Does anyone in the UK sell Magnetic Apogee Detectors?

Cheers

Halam

>Does anyone in the UK sell Magnetic Apogee Detectors?

I'm sure Steve sells them at random solutions  but he's not got any listed 
currently.

might be worth dropping him a line.

Why are you thinking of using a MAD over an altimeter or timer.

I know some people do use these very succesfully but i have also seen a 
number of failures especially if the rocket tail slides.

If no one has one you could always buy one direct from R DeHate 
info@picoalt.com

HTH

Damian


-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

Halam Rose wrote On 10/06/2007 17:39:
> Does anyone in the UK sell Magnetic Apogee Detectors?
> 
> Cheers
> 
> Halam 
> 
> 
Don't know of any UK supplier but as Damian says Steve of Random
Solutions is a good bet.

For advice on using one speak to Mel Sharpe who has many ears experience
on using one and what not to do when near one!


-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

> Why are you thinking of using a MAD over an altimeter or timer.
>
> I know some people do use these very succesfully but i have also seen a 
> number of failures especially if the rocket tail slides.
>

Thanks Damien,

I like to play with new things, surley a rocket wont tail slide for long, 
how could it be stable in reverse?

Cheers,

Halam

"Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:

>> Why are you thinking of using a MAD over an altimeter or timer.
>>
>> I know some people do use these very succesfully but i have also
>> seen a number of failures especially if the rocket tail slides.
>
> Thanks Damien,
>
> I like to play with new things, surley a rocket wont tail slide for
> long, how could it be stable in reverse?

Easily.  Things often tailslide and land in a flat spin, especially
long, thin rockets.  My L1 tailslid at apogee and never turned over,
and that was 6" dia, 4ft tall.

MADs can work but a baro-alt is a much better bet.

Chris
-- 
Chris Eilbeck
MARS Flight Crew                              http://www.mars.org.uk/
UKRA #1108 Level 2                                                UYB
Tripoli UK Member #9527                                          LSMR

Chris Eilbeck wrote:

> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
> 
> >> Why are you thinking of using a MAD over an altimeter or timer.
> > > 
> >> I know some people do use these very succesfully but i have also
> >> seen a number of failures especially if the rocket tail slides.
> > 
> > Thanks Damien,
> > 
> > I like to play with new things, surley a rocket wont tail slide for
> > long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.  My L1 tailslid at apogee and never turned over,
> and that was 6" dia, 4ft tall.
> 
> MADs can work but a baro-alt is a much better bet.
> 
> Chris

I seem to recall that the first MAD flight I ever saw came all the way
from apogee to the ground tail first; think it was a hybrid... might
have belonged to Mupp?

Damian Burrin wrote:
> If no one has one you could always buy one direct from R DeHate 
> info@picoalt.com

I don't think Robert DeHate sells them (I could be wrong). These days I 
buy mine from Bob Fortune @ Aerocon:
   http://www.aeroconsystems.com/electronics/index.htm
I don't know if he exports these devices, though.

It's possible Robert Galejs, the developer of the device, sells them. 
Sorry, I don't have a link or email for him but you could try googling. :-)

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

Chris Eilbeck wrote:
> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>> I like to play with new things, surley a rocket wont tail slide for
>> long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.

With the latter, also known as "backsliding":
   http://members.aol.com/petealway/srrg.htm

A flat spin would most likely be OK with the MAD. The angle at which the 
MAD triggers varies from slightly below horizontal to slightly above 
depending on the compass direction of the rocket's long axis. (And the 
amount of this angle above/below can be "tuned", albeit awkwardly.) A 
backslider doesn't spin but glides with a slight negative angle of 
attack (tail lower than nose), and if it just happens to be gliding in 
the "wrong" compass direction the MAD won't trigger.

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
<me@invalid.invalid> wrote:

>For advice on using one speak to Mel Sharpe who has many ears experience

Isn't he more of  Black Knight's guy?

I'll get my coat...

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
 wrote:

>Chris Eilbeck wrote:
>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>> I like to play with new things, surley a rocket wont tail slide for
>>> long, how could it be stable in reverse?
>> 
>> Easily.  Things often tailslide and land in a flat spin, especially
>> long, thin rockets.
>
>With the latter, also known as "backsliding":
>   http://members.aol.com/petealway/srrg.htm
>

That's a great article. I think we published it in 10,9,8... not sure
which issue though.

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

>Does anyone in the UK sell Magnetic Apogee Detectors?

I'm sure Steve sells them at random solutions  but he's not got any listed 
currently.

might be worth dropping him a line.

Why are you thinking of using a MAD over an altimeter or timer.

I know some people do use these very succesfully but i have also seen a 
number of failures especially if the rocket tail slides.

If no one has one you could always buy one direct from R DeHate 
info@picoalt.com

HTH

Damian


-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

Halam Rose wrote On 10/06/2007 17:39:
> Does anyone in the UK sell Magnetic Apogee Detectors?
> 
> Cheers
> 
> Halam 
> 
> 
Don't know of any UK supplier but as Damian says Steve of Random
Solutions is a good bet.

For advice on using one speak to Mel Sharpe who has many ears experience
on using one and what not to do when near one!


-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

> Why are you thinking of using a MAD over an altimeter or timer.
>
> I know some people do use these very succesfully but i have also seen a 
> number of failures especially if the rocket tail slides.
>

Thanks Damien,

I like to play with new things, surley a rocket wont tail slide for long, 
how could it be stable in reverse?

Cheers,

Halam

"Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:

>> Why are you thinking of using a MAD over an altimeter or timer.
>>
>> I know some people do use these very succesfully but i have also
>> seen a number of failures especially if the rocket tail slides.
>
> Thanks Damien,
>
> I like to play with new things, surley a rocket wont tail slide for
> long, how could it be stable in reverse?

Easily.  Things often tailslide and land in a flat spin, especially
long, thin rockets.  My L1 tailslid at apogee and never turned over,
and that was 6" dia, 4ft tall.

MADs can work but a baro-alt is a much better bet.

Chris
-- 
Chris Eilbeck
MARS Flight Crew                              http://www.mars.org.uk/
UKRA #1108 Level 2                                                UYB
Tripoli UK Member #9527                                          LSMR

Chris Eilbeck wrote:

> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
> 
> >> Why are you thinking of using a MAD over an altimeter or timer.
> > > 
> >> I know some people do use these very succesfully but i have also
> >> seen a number of failures especially if the rocket tail slides.
> > 
> > Thanks Damien,
> > 
> > I like to play with new things, surley a rocket wont tail slide for
> > long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.  My L1 tailslid at apogee and never turned over,
> and that was 6" dia, 4ft tall.
> 
> MADs can work but a baro-alt is a much better bet.
> 
> Chris

I seem to recall that the first MAD flight I ever saw came all the way
from apogee to the ground tail first; think it was a hybrid... might
have belonged to Mupp?

Damian Burrin wrote:
> If no one has one you could always buy one direct from R DeHate 
> info@picoalt.com

I don't think Robert DeHate sells them (I could be wrong). These days I 
buy mine from Bob Fortune @ Aerocon:
   http://www.aeroconsystems.com/electronics/index.htm
I don't know if he exports these devices, though.

It's possible Robert Galejs, the developer of the device, sells them. 
Sorry, I don't have a link or email for him but you could try googling. :-)

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

Chris Eilbeck wrote:
> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>> I like to play with new things, surley a rocket wont tail slide for
>> long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.

With the latter, also known as "backsliding":
   http://members.aol.com/petealway/srrg.htm

A flat spin would most likely be OK with the MAD. The angle at which the 
MAD triggers varies from slightly below horizontal to slightly above 
depending on the compass direction of the rocket's long axis. (And the 
amount of this angle above/below can be "tuned", albeit awkwardly.) A 
backslider doesn't spin but glides with a slight negative angle of 
attack (tail lower than nose), and if it just happens to be gliding in 
the "wrong" compass direction the MAD won't trigger.

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
<me@invalid.invalid> wrote:

>For advice on using one speak to Mel Sharpe who has many ears experience

Isn't he more of  Black Knight's guy?

I'll get my coat...

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
 wrote:

>Chris Eilbeck wrote:
>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>> I like to play with new things, surley a rocket wont tail slide for
>>> long, how could it be stable in reverse?
>> 
>> Easily.  Things often tailslide and land in a flat spin, especially
>> long, thin rockets.
>
>With the latter, also known as "backsliding":
>   http://members.aol.com/petealway/srrg.htm
>

That's a great article. I think we published it in 10,9,8... not sure
which issue though.

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

"Darren J Longhorn"  wrote in message 
news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>  wrote:
>
>>Chris Eilbeck wrote:
>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>> I like to play with new things, surley a rocket wont tail slide for
>>>> long, how could it be stable in reverse?
>>>
>>> Easily.  Things often tailslide and land in a flat spin, especially
>>> long, thin rockets.
>>
>>With the latter, also known as "backsliding":
>>   http://members.aol.com/petealway/srrg.htm
>>
>
> That's a great article. I think we published it in 10,9,8... not sure
> which issue though.

Volume 7, Issue 3.  Ignore page 8...

Darren J Longhorn wrote On 11/06/2007 01:44:
> On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
> <me@invalid.invalid> wrote:
> 
>> For advice on using one speak to Mel Sharpe who has many ears experience
> 
> Isn't he more of  Black Knight's guy?
> 
> I'll get my coat...
> 
LOL

-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

No need to google...

Several vendors in the UK have, in the past, stocked my kits.  However, 
I haven't heard from any of them in years.  Not sure why.

I do sell MAD kits directly.  They are US$30 each.  Paypal to this 
e-mail works well to money to the US.  This includes normal 
international first-class shipping.  If you want it sooner, let me know 
and I'll see how much more it would cost.

Thanks,

Robert Galejs

Steve Humphrey wrote:
> Damian Burrin wrote:
>> If no one has one you could always buy one direct from R DeHate 
>> info@picoalt.com
> 
> I don't think Robert DeHate sells them (I could be wrong). These days I 
> buy mine from Bob Fortune @ Aerocon:
>   http://www.aeroconsystems.com/electronics/index.htm
> I don't know if he exports these devices, though.
> 
> It's possible Robert Galejs, the developer of the device, sells them. 
> Sorry, I don't have a link or email for him but you could try googling. :-)
>

>Does anyone in the UK sell Magnetic Apogee Detectors?

I'm sure Steve sells them at random solutions  but he's not got any listed 
currently.

might be worth dropping him a line.

Why are you thinking of using a MAD over an altimeter or timer.

I know some people do use these very succesfully but i have also seen a 
number of failures especially if the rocket tail slides.

If no one has one you could always buy one direct from R DeHate 
info@picoalt.com

HTH

Damian


-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

Halam Rose wrote On 10/06/2007 17:39:
> Does anyone in the UK sell Magnetic Apogee Detectors?
> 
> Cheers
> 
> Halam 
> 
> 
Don't know of any UK supplier but as Damian says Steve of Random
Solutions is a good bet.

For advice on using one speak to Mel Sharpe who has many ears experience
on using one and what not to do when near one!


-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

> Why are you thinking of using a MAD over an altimeter or timer.
>
> I know some people do use these very succesfully but i have also seen a 
> number of failures especially if the rocket tail slides.
>

Thanks Damien,

I like to play with new things, surley a rocket wont tail slide for long, 
how could it be stable in reverse?

Cheers,

Halam

"Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:

>> Why are you thinking of using a MAD over an altimeter or timer.
>>
>> I know some people do use these very succesfully but i have also
>> seen a number of failures especially if the rocket tail slides.
>
> Thanks Damien,
>
> I like to play with new things, surley a rocket wont tail slide for
> long, how could it be stable in reverse?

Easily.  Things often tailslide and land in a flat spin, especially
long, thin rockets.  My L1 tailslid at apogee and never turned over,
and that was 6" dia, 4ft tall.

MADs can work but a baro-alt is a much better bet.

Chris
-- 
Chris Eilbeck
MARS Flight Crew                              http://www.mars.org.uk/
UKRA #1108 Level 2                                                UYB
Tripoli UK Member #9527                                          LSMR

Chris Eilbeck wrote:

> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
> 
> >> Why are you thinking of using a MAD over an altimeter or timer.
> > > 
> >> I know some people do use these very succesfully but i have also
> >> seen a number of failures especially if the rocket tail slides.
> > 
> > Thanks Damien,
> > 
> > I like to play with new things, surley a rocket wont tail slide for
> > long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.  My L1 tailslid at apogee and never turned over,
> and that was 6" dia, 4ft tall.
> 
> MADs can work but a baro-alt is a much better bet.
> 
> Chris

I seem to recall that the first MAD flight I ever saw came all the way
from apogee to the ground tail first; think it was a hybrid... might
have belonged to Mupp?

Damian Burrin wrote:
> If no one has one you could always buy one direct from R DeHate 
> info@picoalt.com

I don't think Robert DeHate sells them (I could be wrong). These days I 
buy mine from Bob Fortune @ Aerocon:
   http://www.aeroconsystems.com/electronics/index.htm
I don't know if he exports these devices, though.

It's possible Robert Galejs, the developer of the device, sells them. 
Sorry, I don't have a link or email for him but you could try googling. :-)

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

Chris Eilbeck wrote:
> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>> I like to play with new things, surley a rocket wont tail slide for
>> long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.

With the latter, also known as "backsliding":
   http://members.aol.com/petealway/srrg.htm

A flat spin would most likely be OK with the MAD. The angle at which the 
MAD triggers varies from slightly below horizontal to slightly above 
depending on the compass direction of the rocket's long axis. (And the 
amount of this angle above/below can be "tuned", albeit awkwardly.) A 
backslider doesn't spin but glides with a slight negative angle of 
attack (tail lower than nose), and if it just happens to be gliding in 
the "wrong" compass direction the MAD won't trigger.

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
<me@invalid.invalid> wrote:

>For advice on using one speak to Mel Sharpe who has many ears experience

Isn't he more of  Black Knight's guy?

I'll get my coat...

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
 wrote:

>Chris Eilbeck wrote:
>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>> I like to play with new things, surley a rocket wont tail slide for
>>> long, how could it be stable in reverse?
>> 
>> Easily.  Things often tailslide and land in a flat spin, especially
>> long, thin rockets.
>
>With the latter, also known as "backsliding":
>   http://members.aol.com/petealway/srrg.htm
>

That's a great article. I think we published it in 10,9,8... not sure
which issue though.

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

"Darren J Longhorn"  wrote in message 
news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>  wrote:
>
>>Chris Eilbeck wrote:
>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>> I like to play with new things, surley a rocket wont tail slide for
>>>> long, how could it be stable in reverse?
>>>
>>> Easily.  Things often tailslide and land in a flat spin, especially
>>> long, thin rockets.
>>
>>With the latter, also known as "backsliding":
>>   http://members.aol.com/petealway/srrg.htm
>>
>
> That's a great article. I think we published it in 10,9,8... not sure
> which issue though.

Volume 7, Issue 3.  Ignore page 8...

Darren J Longhorn wrote On 11/06/2007 01:44:
> On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
> <me@invalid.invalid> wrote:
> 
>> For advice on using one speak to Mel Sharpe who has many ears experience
> 
> Isn't he more of  Black Knight's guy?
> 
> I'll get my coat...
> 
LOL

-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

No need to google...

Several vendors in the UK have, in the past, stocked my kits.  However, 
I haven't heard from any of them in years.  Not sure why.

I do sell MAD kits directly.  They are US$30 each.  Paypal to this 
e-mail works well to money to the US.  This includes normal 
international first-class shipping.  If you want it sooner, let me know 
and I'll see how much more it would cost.

Thanks,

Robert Galejs

Steve Humphrey wrote:
> Damian Burrin wrote:
>> If no one has one you could always buy one direct from R DeHate 
>> info@picoalt.com
> 
> I don't think Robert DeHate sells them (I could be wrong). These days I 
> buy mine from Bob Fortune @ Aerocon:
>   http://www.aeroconsystems.com/electronics/index.htm
> I don't know if he exports these devices, though.
> 
> It's possible Robert Galejs, the developer of the device, sells them. 
> Sorry, I don't have a link or email for him but you could try googling. :-)
>

"Robert Galejs"  wrote in message 
news:466D5014.7090909@ll.mit.edu...
> I do sell MAD kits directly.  They are US$30 each.  Paypal to this e-mail 
> works well to money to the US.  This includes normal international 
> first-class shipping.  If you want it sooner, let me know and I'll see how 
> much more it would cost.

Great, Paypal should have come through to you already.

Thanks

Halam

>I don't think Robert DeHate

Sorry yes i meant Robert Galejs.  DeHate does the pico Duh!!

damian

-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

On Mon, 11 Jun 2007 08:17:09 +0100, "Richard Parkin"  wrote:

>
>"Darren J Longhorn"  wrote in message 
>news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
>> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>>  wrote:
>>
>>>Chris Eilbeck wrote:
>>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>>> I like to play with new things, surley a rocket wont tail slide for
>>>>> long, how could it be stable in reverse?
>>>>
>>>> Easily.  Things often tailslide and land in a flat spin, especially
>>>> long, thin rockets.
>>>
>>>With the latter, also known as "backsliding":
>>>   http://members.aol.com/petealway/srrg.htm
>>>
>>
>> That's a great article. I think we published it in 10,9,8... not sure
>> which issue though.
>
>Volume 7, Issue 3.  Ignore page 8... 

I appear to have lost the use of my eyes.


-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

>Does anyone in the UK sell Magnetic Apogee Detectors?

I'm sure Steve sells them at random solutions  but he's not got any listed 
currently.

might be worth dropping him a line.

Why are you thinking of using a MAD over an altimeter or timer.

I know some people do use these very succesfully but i have also seen a 
number of failures especially if the rocket tail slides.

If no one has one you could always buy one direct from R DeHate 
info@picoalt.com

HTH

Damian


-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

Halam Rose wrote On 10/06/2007 17:39:
> Does anyone in the UK sell Magnetic Apogee Detectors?
> 
> Cheers
> 
> Halam 
> 
> 
Don't know of any UK supplier but as Damian says Steve of Random
Solutions is a good bet.

For advice on using one speak to Mel Sharpe who has many ears experience
on using one and what not to do when near one!


-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

> Why are you thinking of using a MAD over an altimeter or timer.
>
> I know some people do use these very succesfully but i have also seen a 
> number of failures especially if the rocket tail slides.
>

Thanks Damien,

I like to play with new things, surley a rocket wont tail slide for long, 
how could it be stable in reverse?

Cheers,

Halam

"Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:

>> Why are you thinking of using a MAD over an altimeter or timer.
>>
>> I know some people do use these very succesfully but i have also
>> seen a number of failures especially if the rocket tail slides.
>
> Thanks Damien,
>
> I like to play with new things, surley a rocket wont tail slide for
> long, how could it be stable in reverse?

Easily.  Things often tailslide and land in a flat spin, especially
long, thin rockets.  My L1 tailslid at apogee and never turned over,
and that was 6" dia, 4ft tall.

MADs can work but a baro-alt is a much better bet.

Chris
-- 
Chris Eilbeck
MARS Flight Crew                              http://www.mars.org.uk/
UKRA #1108 Level 2                                                UYB
Tripoli UK Member #9527                                          LSMR

Chris Eilbeck wrote:

> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
> 
> >> Why are you thinking of using a MAD over an altimeter or timer.
> > > 
> >> I know some people do use these very succesfully but i have also
> >> seen a number of failures especially if the rocket tail slides.
> > 
> > Thanks Damien,
> > 
> > I like to play with new things, surley a rocket wont tail slide for
> > long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.  My L1 tailslid at apogee and never turned over,
> and that was 6" dia, 4ft tall.
> 
> MADs can work but a baro-alt is a much better bet.
> 
> Chris

I seem to recall that the first MAD flight I ever saw came all the way
from apogee to the ground tail first; think it was a hybrid... might
have belonged to Mupp?

Damian Burrin wrote:
> If no one has one you could always buy one direct from R DeHate 
> info@picoalt.com

I don't think Robert DeHate sells them (I could be wrong). These days I 
buy mine from Bob Fortune @ Aerocon:
   http://www.aeroconsystems.com/electronics/index.htm
I don't know if he exports these devices, though.

It's possible Robert Galejs, the developer of the device, sells them. 
Sorry, I don't have a link or email for him but you could try googling. :-)

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

Chris Eilbeck wrote:
> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>> I like to play with new things, surley a rocket wont tail slide for
>> long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.

With the latter, also known as "backsliding":
   http://members.aol.com/petealway/srrg.htm

A flat spin would most likely be OK with the MAD. The angle at which the 
MAD triggers varies from slightly below horizontal to slightly above 
depending on the compass direction of the rocket's long axis. (And the 
amount of this angle above/below can be "tuned", albeit awkwardly.) A 
backslider doesn't spin but glides with a slight negative angle of 
attack (tail lower than nose), and if it just happens to be gliding in 
the "wrong" compass direction the MAD won't trigger.

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
<me@invalid.invalid> wrote:

>For advice on using one speak to Mel Sharpe who has many ears experience

Isn't he more of  Black Knight's guy?

I'll get my coat...

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
 wrote:

>Chris Eilbeck wrote:
>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>> I like to play with new things, surley a rocket wont tail slide for
>>> long, how could it be stable in reverse?
>> 
>> Easily.  Things often tailslide and land in a flat spin, especially
>> long, thin rockets.
>
>With the latter, also known as "backsliding":
>   http://members.aol.com/petealway/srrg.htm
>

That's a great article. I think we published it in 10,9,8... not sure
which issue though.

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

"Darren J Longhorn"  wrote in message 
news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>  wrote:
>
>>Chris Eilbeck wrote:
>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>> I like to play with new things, surley a rocket wont tail slide for
>>>> long, how could it be stable in reverse?
>>>
>>> Easily.  Things often tailslide and land in a flat spin, especially
>>> long, thin rockets.
>>
>>With the latter, also known as "backsliding":
>>   http://members.aol.com/petealway/srrg.htm
>>
>
> That's a great article. I think we published it in 10,9,8... not sure
> which issue though.

Volume 7, Issue 3.  Ignore page 8...

Darren J Longhorn wrote On 11/06/2007 01:44:
> On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
> <me@invalid.invalid> wrote:
> 
>> For advice on using one speak to Mel Sharpe who has many ears experience
> 
> Isn't he more of  Black Knight's guy?
> 
> I'll get my coat...
> 
LOL

-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

No need to google...

Several vendors in the UK have, in the past, stocked my kits.  However, 
I haven't heard from any of them in years.  Not sure why.

I do sell MAD kits directly.  They are US$30 each.  Paypal to this 
e-mail works well to money to the US.  This includes normal 
international first-class shipping.  If you want it sooner, let me know 
and I'll see how much more it would cost.

Thanks,

Robert Galejs

Steve Humphrey wrote:
> Damian Burrin wrote:
>> If no one has one you could always buy one direct from R DeHate 
>> info@picoalt.com
> 
> I don't think Robert DeHate sells them (I could be wrong). These days I 
> buy mine from Bob Fortune @ Aerocon:
>   http://www.aeroconsystems.com/electronics/index.htm
> I don't know if he exports these devices, though.
> 
> It's possible Robert Galejs, the developer of the device, sells them. 
> Sorry, I don't have a link or email for him but you could try googling. :-)
>

"Robert Galejs"  wrote in message 
news:466D5014.7090909@ll.mit.edu...
> I do sell MAD kits directly.  They are US$30 each.  Paypal to this e-mail 
> works well to money to the US.  This includes normal international 
> first-class shipping.  If you want it sooner, let me know and I'll see how 
> much more it would cost.

Great, Paypal should have come through to you already.

Thanks

Halam

>I don't think Robert DeHate

Sorry yes i meant Robert Galejs.  DeHate does the pico Duh!!

damian

-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

On Mon, 11 Jun 2007 08:17:09 +0100, "Richard Parkin"  wrote:

>
>"Darren J Longhorn"  wrote in message 
>news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
>> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>>  wrote:
>>
>>>Chris Eilbeck wrote:
>>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>>> I like to play with new things, surley a rocket wont tail slide for
>>>>> long, how could it be stable in reverse?
>>>>
>>>> Easily.  Things often tailslide and land in a flat spin, especially
>>>> long, thin rockets.
>>>
>>>With the latter, also known as "backsliding":
>>>   http://members.aol.com/petealway/srrg.htm
>>>
>>
>> That's a great article. I think we published it in 10,9,8... not sure
>> which issue though.
>
>Volume 7, Issue 3.  Ignore page 8... 

I appear to have lost the use of my eyes.


-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

>Does anyone in the UK sell Magnetic Apogee Detectors?

I'm sure Steve sells them at random solutions  but he's not got any listed 
currently.

might be worth dropping him a line.

Why are you thinking of using a MAD over an altimeter or timer.

I know some people do use these very succesfully but i have also seen a 
number of failures especially if the rocket tail slides.

If no one has one you could always buy one direct from R DeHate 
info@picoalt.com

HTH

Damian


-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

Halam Rose wrote On 10/06/2007 17:39:
> Does anyone in the UK sell Magnetic Apogee Detectors?
> 
> Cheers
> 
> Halam 
> 
> 
Don't know of any UK supplier but as Damian says Steve of Random
Solutions is a good bet.

For advice on using one speak to Mel Sharpe who has many ears experience
on using one and what not to do when near one!


-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

> Why are you thinking of using a MAD over an altimeter or timer.
>
> I know some people do use these very succesfully but i have also seen a 
> number of failures especially if the rocket tail slides.
>

Thanks Damien,

I like to play with new things, surley a rocket wont tail slide for long, 
how could it be stable in reverse?

Cheers,

Halam

"Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:

>> Why are you thinking of using a MAD over an altimeter or timer.
>>
>> I know some people do use these very succesfully but i have also
>> seen a number of failures especially if the rocket tail slides.
>
> Thanks Damien,
>
> I like to play with new things, surley a rocket wont tail slide for
> long, how could it be stable in reverse?

Easily.  Things often tailslide and land in a flat spin, especially
long, thin rockets.  My L1 tailslid at apogee and never turned over,
and that was 6" dia, 4ft tall.

MADs can work but a baro-alt is a much better bet.

Chris
-- 
Chris Eilbeck
MARS Flight Crew                              http://www.mars.org.uk/
UKRA #1108 Level 2                                                UYB
Tripoli UK Member #9527                                          LSMR

Chris Eilbeck wrote:

> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
> 
> >> Why are you thinking of using a MAD over an altimeter or timer.
> > > 
> >> I know some people do use these very succesfully but i have also
> >> seen a number of failures especially if the rocket tail slides.
> > 
> > Thanks Damien,
> > 
> > I like to play with new things, surley a rocket wont tail slide for
> > long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.  My L1 tailslid at apogee and never turned over,
> and that was 6" dia, 4ft tall.
> 
> MADs can work but a baro-alt is a much better bet.
> 
> Chris

I seem to recall that the first MAD flight I ever saw came all the way
from apogee to the ground tail first; think it was a hybrid... might
have belonged to Mupp?

Damian Burrin wrote:
> If no one has one you could always buy one direct from R DeHate 
> info@picoalt.com

I don't think Robert DeHate sells them (I could be wrong). These days I 
buy mine from Bob Fortune @ Aerocon:
   http://www.aeroconsystems.com/electronics/index.htm
I don't know if he exports these devices, though.

It's possible Robert Galejs, the developer of the device, sells them. 
Sorry, I don't have a link or email for him but you could try googling. :-)

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

Chris Eilbeck wrote:
> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>> I like to play with new things, surley a rocket wont tail slide for
>> long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.

With the latter, also known as "backsliding":
   http://members.aol.com/petealway/srrg.htm

A flat spin would most likely be OK with the MAD. The angle at which the 
MAD triggers varies from slightly below horizontal to slightly above 
depending on the compass direction of the rocket's long axis. (And the 
amount of this angle above/below can be "tuned", albeit awkwardly.) A 
backslider doesn't spin but glides with a slight negative angle of 
attack (tail lower than nose), and if it just happens to be gliding in 
the "wrong" compass direction the MAD won't trigger.

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
<me@invalid.invalid> wrote:

>For advice on using one speak to Mel Sharpe who has many ears experience

Isn't he more of  Black Knight's guy?

I'll get my coat...

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
 wrote:

>Chris Eilbeck wrote:
>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>> I like to play with new things, surley a rocket wont tail slide for
>>> long, how could it be stable in reverse?
>> 
>> Easily.  Things often tailslide and land in a flat spin, especially
>> long, thin rockets.
>
>With the latter, also known as "backsliding":
>   http://members.aol.com/petealway/srrg.htm
>

That's a great article. I think we published it in 10,9,8... not sure
which issue though.

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

"Darren J Longhorn"  wrote in message 
news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>  wrote:
>
>>Chris Eilbeck wrote:
>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>> I like to play with new things, surley a rocket wont tail slide for
>>>> long, how could it be stable in reverse?
>>>
>>> Easily.  Things often tailslide and land in a flat spin, especially
>>> long, thin rockets.
>>
>>With the latter, also known as "backsliding":
>>   http://members.aol.com/petealway/srrg.htm
>>
>
> That's a great article. I think we published it in 10,9,8... not sure
> which issue though.

Volume 7, Issue 3.  Ignore page 8...

Darren J Longhorn wrote On 11/06/2007 01:44:
> On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
> <me@invalid.invalid> wrote:
> 
>> For advice on using one speak to Mel Sharpe who has many ears experience
> 
> Isn't he more of  Black Knight's guy?
> 
> I'll get my coat...
> 
LOL

-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

No need to google...

Several vendors in the UK have, in the past, stocked my kits.  However, 
I haven't heard from any of them in years.  Not sure why.

I do sell MAD kits directly.  They are US$30 each.  Paypal to this 
e-mail works well to money to the US.  This includes normal 
international first-class shipping.  If you want it sooner, let me know 
and I'll see how much more it would cost.

Thanks,

Robert Galejs

Steve Humphrey wrote:
> Damian Burrin wrote:
>> If no one has one you could always buy one direct from R DeHate 
>> info@picoalt.com
> 
> I don't think Robert DeHate sells them (I could be wrong). These days I 
> buy mine from Bob Fortune @ Aerocon:
>   http://www.aeroconsystems.com/electronics/index.htm
> I don't know if he exports these devices, though.
> 
> It's possible Robert Galejs, the developer of the device, sells them. 
> Sorry, I don't have a link or email for him but you could try googling. :-)
>

"Robert Galejs"  wrote in message 
news:466D5014.7090909@ll.mit.edu...
> I do sell MAD kits directly.  They are US$30 each.  Paypal to this e-mail 
> works well to money to the US.  This includes normal international 
> first-class shipping.  If you want it sooner, let me know and I'll see how 
> much more it would cost.

Great, Paypal should have come through to you already.

Thanks

Halam

>I don't think Robert DeHate

Sorry yes i meant Robert Galejs.  DeHate does the pico Duh!!

damian

-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

On Mon, 11 Jun 2007 08:17:09 +0100, "Richard Parkin"  wrote:

>
>"Darren J Longhorn"  wrote in message 
>news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
>> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>>  wrote:
>>
>>>Chris Eilbeck wrote:
>>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>>> I like to play with new things, surley a rocket wont tail slide for
>>>>> long, how could it be stable in reverse?
>>>>
>>>> Easily.  Things often tailslide and land in a flat spin, especially
>>>> long, thin rockets.
>>>
>>>With the latter, also known as "backsliding":
>>>   http://members.aol.com/petealway/srrg.htm
>>>
>>
>> That's a great article. I think we published it in 10,9,8... not sure
>> which issue though.
>
>Volume 7, Issue 3.  Ignore page 8... 

I appear to have lost the use of my eyes.


-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

>Does anyone in the UK sell Magnetic Apogee Detectors?

I'm sure Steve sells them at random solutions  but he's not got any listed 
currently.

might be worth dropping him a line.

Why are you thinking of using a MAD over an altimeter or timer.

I know some people do use these very succesfully but i have also seen a 
number of failures especially if the rocket tail slides.

If no one has one you could always buy one direct from R DeHate 
info@picoalt.com

HTH

Damian


-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

Halam Rose wrote On 10/06/2007 17:39:
> Does anyone in the UK sell Magnetic Apogee Detectors?
> 
> Cheers
> 
> Halam 
> 
> 
Don't know of any UK supplier but as Damian says Steve of Random
Solutions is a good bet.

For advice on using one speak to Mel Sharpe who has many ears experience
on using one and what not to do when near one!


-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

> Why are you thinking of using a MAD over an altimeter or timer.
>
> I know some people do use these very succesfully but i have also seen a 
> number of failures especially if the rocket tail slides.
>

Thanks Damien,

I like to play with new things, surley a rocket wont tail slide for long, 
how could it be stable in reverse?

Cheers,

Halam

"Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:

>> Why are you thinking of using a MAD over an altimeter or timer.
>>
>> I know some people do use these very succesfully but i have also
>> seen a number of failures especially if the rocket tail slides.
>
> Thanks Damien,
>
> I like to play with new things, surley a rocket wont tail slide for
> long, how could it be stable in reverse?

Easily.  Things often tailslide and land in a flat spin, especially
long, thin rockets.  My L1 tailslid at apogee and never turned over,
and that was 6" dia, 4ft tall.

MADs can work but a baro-alt is a much better bet.

Chris
-- 
Chris Eilbeck
MARS Flight Crew                              http://www.mars.org.uk/
UKRA #1108 Level 2                                                UYB
Tripoli UK Member #9527                                          LSMR

Chris Eilbeck wrote:

> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
> 
> >> Why are you thinking of using a MAD over an altimeter or timer.
> > > 
> >> I know some people do use these very succesfully but i have also
> >> seen a number of failures especially if the rocket tail slides.
> > 
> > Thanks Damien,
> > 
> > I like to play with new things, surley a rocket wont tail slide for
> > long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.  My L1 tailslid at apogee and never turned over,
> and that was 6" dia, 4ft tall.
> 
> MADs can work but a baro-alt is a much better bet.
> 
> Chris

I seem to recall that the first MAD flight I ever saw came all the way
from apogee to the ground tail first; think it was a hybrid... might
have belonged to Mupp?

Damian Burrin wrote:
> If no one has one you could always buy one direct from R DeHate 
> info@picoalt.com

I don't think Robert DeHate sells them (I could be wrong). These days I 
buy mine from Bob Fortune @ Aerocon:
   http://www.aeroconsystems.com/electronics/index.htm
I don't know if he exports these devices, though.

It's possible Robert Galejs, the developer of the device, sells them. 
Sorry, I don't have a link or email for him but you could try googling. :-)

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

Chris Eilbeck wrote:
> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>> I like to play with new things, surley a rocket wont tail slide for
>> long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.

With the latter, also known as "backsliding":
   http://members.aol.com/petealway/srrg.htm

A flat spin would most likely be OK with the MAD. The angle at which the 
MAD triggers varies from slightly below horizontal to slightly above 
depending on the compass direction of the rocket's long axis. (And the 
amount of this angle above/below can be "tuned", albeit awkwardly.) A 
backslider doesn't spin but glides with a slight negative angle of 
attack (tail lower than nose), and if it just happens to be gliding in 
the "wrong" compass direction the MAD won't trigger.

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
<me@invalid.invalid> wrote:

>For advice on using one speak to Mel Sharpe who has many ears experience

Isn't he more of  Black Knight's guy?

I'll get my coat...

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
 wrote:

>Chris Eilbeck wrote:
>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>> I like to play with new things, surley a rocket wont tail slide for
>>> long, how could it be stable in reverse?
>> 
>> Easily.  Things often tailslide and land in a flat spin, especially
>> long, thin rockets.
>
>With the latter, also known as "backsliding":
>   http://members.aol.com/petealway/srrg.htm
>

That's a great article. I think we published it in 10,9,8... not sure
which issue though.

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

"Darren J Longhorn"  wrote in message 
news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>  wrote:
>
>>Chris Eilbeck wrote:
>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>> I like to play with new things, surley a rocket wont tail slide for
>>>> long, how could it be stable in reverse?
>>>
>>> Easily.  Things often tailslide and land in a flat spin, especially
>>> long, thin rockets.
>>
>>With the latter, also known as "backsliding":
>>   http://members.aol.com/petealway/srrg.htm
>>
>
> That's a great article. I think we published it in 10,9,8... not sure
> which issue though.

Volume 7, Issue 3.  Ignore page 8...

Darren J Longhorn wrote On 11/06/2007 01:44:
> On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
> <me@invalid.invalid> wrote:
> 
>> For advice on using one speak to Mel Sharpe who has many ears experience
> 
> Isn't he more of  Black Knight's guy?
> 
> I'll get my coat...
> 
LOL

-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

No need to google...

Several vendors in the UK have, in the past, stocked my kits.  However, 
I haven't heard from any of them in years.  Not sure why.

I do sell MAD kits directly.  They are US$30 each.  Paypal to this 
e-mail works well to money to the US.  This includes normal 
international first-class shipping.  If you want it sooner, let me know 
and I'll see how much more it would cost.

Thanks,

Robert Galejs

Steve Humphrey wrote:
> Damian Burrin wrote:
>> If no one has one you could always buy one direct from R DeHate 
>> info@picoalt.com
> 
> I don't think Robert DeHate sells them (I could be wrong). These days I 
> buy mine from Bob Fortune @ Aerocon:
>   http://www.aeroconsystems.com/electronics/index.htm
> I don't know if he exports these devices, though.
> 
> It's possible Robert Galejs, the developer of the device, sells them. 
> Sorry, I don't have a link or email for him but you could try googling. :-)
>

"Robert Galejs"  wrote in message 
news:466D5014.7090909@ll.mit.edu...
> I do sell MAD kits directly.  They are US$30 each.  Paypal to this e-mail 
> works well to money to the US.  This includes normal international 
> first-class shipping.  If you want it sooner, let me know and I'll see how 
> much more it would cost.

Great, Paypal should have come through to you already.

Thanks

Halam

>I don't think Robert DeHate

Sorry yes i meant Robert Galejs.  DeHate does the pico Duh!!

damian

-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

On Mon, 11 Jun 2007 08:17:09 +0100, "Richard Parkin"  wrote:

>
>"Darren J Longhorn"  wrote in message 
>news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
>> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>>  wrote:
>>
>>>Chris Eilbeck wrote:
>>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>>> I like to play with new things, surley a rocket wont tail slide for
>>>>> long, how could it be stable in reverse?
>>>>
>>>> Easily.  Things often tailslide and land in a flat spin, especially
>>>> long, thin rockets.
>>>
>>>With the latter, also known as "backsliding":
>>>   http://members.aol.com/petealway/srrg.htm
>>>
>>
>> That's a great article. I think we published it in 10,9,8... not sure
>> which issue though.
>
>Volume 7, Issue 3.  Ignore page 8... 

I appear to have lost the use of my eyes.


-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

>Does anyone in the UK sell Magnetic Apogee Detectors?

I'm sure Steve sells them at random solutions  but he's not got any listed 
currently.

might be worth dropping him a line.

Why are you thinking of using a MAD over an altimeter or timer.

I know some people do use these very succesfully but i have also seen a 
number of failures especially if the rocket tail slides.

If no one has one you could always buy one direct from R DeHate 
info@picoalt.com

HTH

Damian


-- 
Damian Burrin
UKRA 1159 Level 2 RSO

http://www.ukrocketry.com
http://www.larf-rocketry.co.uk

LARF - Putting the amateur back in rocketry!!

Halam Rose wrote On 10/06/2007 17:39:
> Does anyone in the UK sell Magnetic Apogee Detectors?
> 
> Cheers
> 
> Halam 
> 
> 
Don't know of any UK supplier but as Damian says Steve of Random
Solutions is a good bet.

For advice on using one speak to Mel Sharpe who has many ears experience
on using one and what not to do when near one!


-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

> Why are you thinking of using a MAD over an altimeter or timer.
>
> I know some people do use these very succesfully but i have also seen a 
> number of failures especially if the rocket tail slides.
>

Thanks Damien,

I like to play with new things, surley a rocket wont tail slide for long, 
how could it be stable in reverse?

Cheers,

Halam

"Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:

>> Why are you thinking of using a MAD over an altimeter or timer.
>>
>> I know some people do use these very succesfully but i have also
>> seen a number of failures especially if the rocket tail slides.
>
> Thanks Damien,
>
> I like to play with new things, surley a rocket wont tail slide for
> long, how could it be stable in reverse?

Easily.  Things often tailslide and land in a flat spin, especially
long, thin rockets.  My L1 tailslid at apogee and never turned over,
and that was 6" dia, 4ft tall.

MADs can work but a baro-alt is a much better bet.

Chris
-- 
Chris Eilbeck
MARS Flight Crew                              http://www.mars.org.uk/
UKRA #1108 Level 2                                                UYB
Tripoli UK Member #9527                                          LSMR

Chris Eilbeck wrote:

> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
> 
> >> Why are you thinking of using a MAD over an altimeter or timer.
> > > 
> >> I know some people do use these very succesfully but i have also
> >> seen a number of failures especially if the rocket tail slides.
> > 
> > Thanks Damien,
> > 
> > I like to play with new things, surley a rocket wont tail slide for
> > long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.  My L1 tailslid at apogee and never turned over,
> and that was 6" dia, 4ft tall.
> 
> MADs can work but a baro-alt is a much better bet.
> 
> Chris

I seem to recall that the first MAD flight I ever saw came all the way
from apogee to the ground tail first; think it was a hybrid... might
have belonged to Mupp?

Damian Burrin wrote:
> If no one has one you could always buy one direct from R DeHate 
> info@picoalt.com

I don't think Robert DeHate sells them (I could be wrong). These days I 
buy mine from Bob Fortune @ Aerocon:
   http://www.aeroconsystems.com/electronics/index.htm
I don't know if he exports these devices, though.

It's possible Robert Galejs, the developer of the device, sells them. 
Sorry, I don't have a link or email for him but you could try googling. :-)

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

Chris Eilbeck wrote:
> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>> I like to play with new things, surley a rocket wont tail slide for
>> long, how could it be stable in reverse?
> 
> Easily.  Things often tailslide and land in a flat spin, especially
> long, thin rockets.

With the latter, also known as "backsliding":
   http://members.aol.com/petealway/srrg.htm

A flat spin would most likely be OK with the MAD. The angle at which the 
MAD triggers varies from slightly below horizontal to slightly above 
depending on the compass direction of the rocket's long axis. (And the 
amount of this angle above/below can be "tuned", albeit awkwardly.) A 
backslider doesn't spin but glides with a slight negative angle of 
attack (tail lower than nose), and if it just happens to be gliding in 
the "wrong" compass direction the MAD won't trigger.

-- 
Steve Humphrey
(replace "spambait" with "merlinus" to respond directly to me)

On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
<me@invalid.invalid> wrote:

>For advice on using one speak to Mel Sharpe who has many ears experience

Isn't he more of  Black Knight's guy?

I'll get my coat...

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
 wrote:

>Chris Eilbeck wrote:
>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>> I like to play with new things, surley a rocket wont tail slide for
>>> long, how could it be stable in reverse?
>> 
>> Easily.  Things often tailslide and land in a flat spin, especially
>> long, thin rockets.
>
>With the latter, also known as "backsliding":
>   http://members.aol.com/petealway/srrg.htm
>

That's a great article. I think we published it in 10,9,8... not sure
which issue though.

-- 
Darren J Longhorn    http://www.geocities.com/darrenlonghorn/
NSRG #005            http://www.northstarrocketry.org.uk/
/UKRA #1094 /L2 /RSO http://www.ukra.org.uk/

"Darren J Longhorn"  wrote in message 
news:ap6p631ub8ea6ssvenjpi04gdgna9coe08@4ax.com...
> On Sun, 10 Jun 2007 19:03:37 -0400, Steve Humphrey
>  wrote:
>
>>Chris Eilbeck wrote:
>>> "Halam Rose" <h@ro[deleteThis]sered.co.uk> writes:
>>>> I like to play with new things, surley a rocket wont tail slide for
>>>> long, how could it be stable in reverse?
>>>
>>> Easily.  Things often tailslide and land in a flat spin, especially
>>> long, thin rockets.
>>
>>With the latter, also known as "backsliding":
>>   http://members.aol.com/petealway/srrg.htm
>>
>
> That's a great article. I think we published it in 10,9,8... not sure
> which issue though.

Volume 7, Issue 3.  Ignore page 8...

Darren J Longhorn wrote On 11/06/2007 01:44:
> On Sun, 10 Jun 2007 20:27:15 +0100, Sean Arrowsmith
> <me@invalid.invalid> wrote:
> 
>> For advice on using one speak to Mel Sharpe who has many ears experience
> 
> Isn't he more of  Black Knight's guy?
> 
> I'll get my coat...
> 
LOL

-- 

Sean
Level 2 RSO
http://rocketry.arrowsmith.uk.com
"If pigs could fly...What would the world be like"

No need to google...

Several vendors in the UK have, in the past, stocked my kits.  However, 
I haven't heard from any of them in years.  Not sure why.

I do sell MAD kits directly.  They are US$30 each.  Paypal to this 
e-mail works well to money to the US.  This includes normal 
international first-class shipping.  If you want it sooner, let me know 
and I'll see how much more it would cost.

Thanks,

Robert Galejs

Steve Humphrey wrote:
> Damian Burrin wrote:
>> If no one has one you could always buy one direct from R DeHate 
>> info@picoalt.com
> 
> I don't think Robert DeHate sells them (I could be wrong). These days I 
> buy mine from Bob Fortune @ Aerocon:
>   http://www.aeroconsystems.com/electronics/index.htm
> I don't know if he exports these devices, though.
> 
> It's possible Robert Galejs, the developer of the device, sells them. 
> Sorry, I don't have a link or email for him but you could try googling. :-)
>

"Robert Galejs"  wrote in message 
news:466D5014.7090909@ll.mit.edu...
> I do sell MAD kits directly.  They are US$30 each.  Paypal to this e-mail 
> works well to money to the US.  This includes normal international 
> first-class shipping.  If you want it sooner, let me know and I'll see how 
> much more it would cost.

Great, Paypal should have come through to you already.

Thanks

Halam