I know, I know - no adverts.

But some bloke on uk.d-i-y has a friend selling a 'Bradbury Freewheel' 4 
wheel lift in London, 500ish, 3phase.

Sounds like the sort of toy most of us would love to have in the garage...

>I know, I know - no adverts.
>
> But some bloke on uk.d-i-y has a friend selling a 'Bradbury Freewheel' 4 
> wheel lift in London, 500ish, 3phase.
>
> Sounds like the sort of toy most of us would love to have in the garage...


4-post lift?  That's bloody cheap if you do mean 4-post lift - if not, 
what's a 4-wheel lift?

A lot of us would love to have one in the garage, but sadly, I don't think 
many of us would have a garage high enough to make decent use of it.

Peter

AstraVanMan (Peter@Whataloadofforeskinbollocks.co.uk) gurgled happily,
sounding much like they were saying : 


>> But some bloke on uk.d-i-y has a friend selling a 'Bradbury
>> Freewheel' 4 wheel lift in London, 500ish, 3phase.

> 4-post lift?  That's bloody cheap if you do mean 4-post lift - if not,
> what's a 4-wheel lift?


I wonder if it's like a friend has two of in his workshop - two post, with 
arms so all four wheels are danglings free.


> A lot of us would love to have one in the garage, but sadly, I don't
> think many of us would have a garage high enough to make decent use of
> it. 


Or, indeed, 3-phase. (One of friend's is single-phase, however...)

The message <P59De.1235$Cu3.640@newsfe4-win.ntli.net>
from "AstraVanMan"  contains
these words:


> A lot of us would love to have one in the garage, but sadly, I don't think 
> many of us would have a garage high enough to make decent use of it.


You could have one of those pleated pop-up roofs you used to see on
Campervans. It'd be dead cool watching the whole roof go up as your car
rose into the gods.

-- 
Skipweasel.
Ivor Cutler - "Never knowingly understood."

The message <eZ8De.159320$Vo6.117451@fe3.news.blueyonder.co.uk>
from "PC Paul"  contains these words:


> Sounds like the sort of toy most of us would love to have in the garage...


Would that I had a 3-ph supply to the garage.

-- 
Skipweasel.
Ivor Cutler - "Never knowingly understood."

> Would that I had a 3-ph supply to the garage.


Inverters are relatively cheap now, and you get second hand ones on eBay.

On Tue, 19 Jul 2005 19:55:55 +0100, "Newshound"
 wrote:


>> Would that I had a 3-ph supply to the garage.
>
>Inverters are relatively cheap now, and you get second hand ones on eBay. 


Hi Guys,

PC Paul kindly posed the ad here on behalf of a mate of mine.

It is a real '4 poster' and was left over from when their company used
to do cars alongside motorbikes.

I was wondering if, depending on the power of the current 3 phase
motor, if it could be replaced with a single phase one (I'm guessing
there is only one motor)?  Machine Mart possibly?

Also I believe the 'freewheel' bit is where you can lidt the car up on
the ramp then lift it again off the ramp to get all 4 wheels clear at
the same time?

All the best ..

T i m

p.s. This is a genuine 'surplus' item ..  ;-)

>

On Tue, 19 Jul 2005 20:32:01 GMT, T i m wrote:


> On Tue, 19 Jul 2005 19:55:55 +0100, "Newshound"
>  wrote:
> 
>>> Would that I had a 3-ph supply to the garage.
>>
>>Inverters are relatively cheap now, and you get second hand ones on eBay. 
> 
> Hi Guys,
> 
> PC Paul kindly posed the ad here on behalf of a mate of mine.
> 
> It is a real '4 poster' and was left over from when their company used
> to do cars alongside motorbikes.
> 
> I was wondering if, depending on the power of the current 3 phase
> motor, if it could be replaced with a single phase one (I'm guessing
> there is only one motor)?  Machine Mart possibly?


Don't bother. Most of the lifts are only 2 horse motors (about 2kw) and you
can easily run a 3 phase inverter from a single phase supply. Usually the
inverter is cheaper than the replacement single phase motor.

<snip>

>> 
>> I was wondering if, depending on the power of the current 3 phase
>> motor, if it could be replaced with a single phase one (I'm guessing
>> there is only one motor)?  Machine Mart possibly?
> 
> Don't bother. Most of the lifts are only 2 horse motors (about 2kw)


2HP is about 1.5kW


> and 
> you can easily run a 3 phase inverter from a single phase supply. Usually
> the inverter is cheaper than the replacement single phase motor.


Indeed, around 250UKP for a 2kW one perhaps. Also likely to be more reliable
and better able to provide the starting torque needed for many applications
that were designed for a 3-phase motor.

Chris

-- 
Remove prejudice to reply

On Tue, 19 Jul 2005 15:36:15 GMT, "AstraVanMan"
 wrote:


>>I know, I know - no adverts.
>>
>> But some bloke on uk.d-i-y has a friend selling a 'Bradbury Freewheel' 4 
>> wheel lift in London, 500ish, 3phase.
>>
>> Sounds like the sort of toy most of us would love to have in the garage...
>
>4-post lift?  That's bloody cheap if you do mean 4-post lift - if not, 
>what's a 4-wheel lift?


That is very cheap.

sponix

On Wed, 20 Jul 2005 08:01:34 GMT, Chris Whelan wrote:


> <snip>
>>> 
>>> I was wondering if, depending on the power of the current 3 phase
>>> motor, if it could be replaced with a single phase one (I'm guessing
>>> there is only one motor)?  Machine Mart possibly?
>> 
>> Don't bother. Most of the lifts are only 2 horse motors (about 2kw)
> 
> 2HP is about 1.5kW


1496W actually. I round up to the nearest convenient number to be safe - as
long as it's less than the magic 3.3kW it'll run off a 13A socket....


> 
>> and 
>> you can easily run a 3 phase inverter from a single phase supply. Usually
>> the inverter is cheaper than the replacement single phase motor.
> 
> Indeed, around 250UKP for a 2kW one perhaps. Also likely to be more reliable
> and better able to provide the starting torque needed for many applications
> that were designed for a 3-phase motor.
> 
> Chris


Think my father paid about 200 for his so that'd be about right. Was
impressed by how small they are now - about the size of a large paperback
with some impressive solid state devices on it doing the grunt work.

Chris Street wrote:

> On Wed, 20 Jul 2005 08:01:34 GMT, Chris Whelan wrote:
>
>> <snip>
>>>>
>>>> I was wondering if, depending on the power of the current 3 phase
>>>> motor, if it could be replaced with a single phase one (I'm
>>>> guessing there is only one motor)?  Machine Mart possibly?
>>>
>>> Don't bother. Most of the lifts are only 2 horse motors (about 2kw)
>>
>> 2HP is about 1.5kW
>
> 1496W actually. I round up to the nearest convenient number to be
> safe - as long as it's less than the magic 3.3kW it'll run off a 13A
> socket....
>
>>
>>> and
>>> you can easily run a 3 phase inverter from a single phase supply.
>>> Usually the inverter is cheaper than the replacement single phase
>>> motor.
>>
>> Indeed, around 250UKP for a 2kW one perhaps. Also likely to be more
>> reliable and better able to provide the starting torque needed for
>> many applications that were designed for a 3-phase motor.
>>
>> Chris
>
> Think my father paid about 200 for his so that'd be about right. Was
> impressed by how small they are now - about the size of a large
> paperback with some impressive solid state devices on it doing the
> grunt work.


lol - the last serious inverter I had anything to do with was a 10kW 400Hz 
3ph generator on the other end of a 3ph 50Hz motor. All had to be bolted 
down firmly in it's own brick shed and it cost a fortune!

<snip>


> 1496W actually. I round up to the nearest convenient number to be safe -
> as long as it's less than the magic 3.3kW it'll run off a 13A socket....


Well, maybe. If the ring main circuit protection is via a MCB rather than a
fuse, you might find the enormous inrush current of these things will cause
nuisance tripping.

Of course, if the installation of a garage hoist was to comply with BS7671,
(as it should), the circuit should be supplied from a separate circuit. :-)

Chris

-- 
Remove prejudice to reply

> lol - the last serious inverter I had anything to do with was a 10kW 400Hz
> 3ph generator on the other end of a 3ph 50Hz motor. All had to be bolted
> down firmly in it's own brick shed and it cost a fortune!


Interesting. How long ago was that? 

I started my electrical career rewinding/repairing stuff like that in 1962!

Chris

-- 
Remove prejudice to reply

Chris Whelan wrote:

>> lol - the last serious inverter I had anything to do with was a 10kW
>> 400Hz 3ph generator on the other end of a 3ph 50Hz motor. All had to
>> be bolted down firmly in it's own brick shed and it cost a fortune!
>
> Interesting. How long ago was that?
>
> I started my electrical career rewinding/repairing stuff like that in
> 1962!
>


About 3 years ago(!) - testing aircraft systems (hence the 400Hz) on the 
ground.

The message <1817q6px6ooht.bs73wg29ne85$.dlg@40tude.net>
from Chris Street  contains these words:



> 1496W actually. I round up to the nearest convenient number to be safe - as
> long as it's less than the magic 3.3kW it'll run off a 13A socket....


I wouldn't like to draw that much off the sockets in my garage - not
knowing what I do about how the power gets there!

-- 
Skipweasel.
Ivor Cutler - "Never knowingly understood."

The message <RPpDe.2246$Pf3.590@fe2.news.blueyonder.co.uk>
from "PC Paul"  contains these words:


> About 3 years ago(!) - testing aircraft systems (hence the 400Hz) on the 
> ground. 


400Hz to make transformers lighter and more efficient, yes?

-- 
Skipweasel.
Ivor Cutler - "Never knowingly understood."

On Wed, 20 Jul 2005 09:39:32 GMT, PC Paul wrote:


> Chris Street wrote:
>> On Wed, 20 Jul 2005 08:01:34 GMT, Chris Whelan wrote:
>>
>>> <snip>
>>>>>
>>>>> I was wondering if, depending on the power of the current 3 phase
>>>>> motor, if it could be replaced with a single phase one (I'm
>>>>> guessing there is only one motor)?  Machine Mart possibly?
>>>>
>>>> Don't bother. Most of the lifts are only 2 horse motors (about 2kw)
>>>
>>> 2HP is about 1.5kW
>>
>> 1496W actually. I round up to the nearest convenient number to be
>> safe - as long as it's less than the magic 3.3kW it'll run off a 13A
>> socket....
>>
>>>
>>>> and
>>>> you can easily run a 3 phase inverter from a single phase supply.
>>>> Usually the inverter is cheaper than the replacement single phase
>>>> motor.
>>>
>>> Indeed, around 250UKP for a 2kW one perhaps. Also likely to be more
>>> reliable and better able to provide the starting torque needed for
>>> many applications that were designed for a 3-phase motor.
>>>
>>> Chris
>>
>> Think my father paid about 200 for his so that'd be about right. Was
>> impressed by how small they are now - about the size of a large
>> paperback with some impressive solid state devices on it doing the
>> grunt work.
> 
> lol - the last serious inverter I had anything to do with was a 10kW 400Hz 
> 3ph generator on the other end of a 3ph 50Hz motor. All had to be bolted 
> down firmly in it's own brick shed and it cost a fortune!


sounds like my Grandpa's welding set. That was a five litre V8 petrol motor
driving a honking great gennie that produced DC at tens of kilowatts. You
could weld armour plate with it if you so desired. 

Brick shed was optional but kept the rain off this behomoth.

Guy King wrote:

> The message <RPpDe.2246$Pf3.590@fe2.news.blueyonder.co.uk>
> from "PC Paul"  contains these words:
>
>> About 3 years ago(!) - testing aircraft systems (hence the 400Hz) on
>> the ground.
>
> 400Hz to make transformers lighter and more efficient, yes?


Yup.

The downside is that reactive power losses are significantly higher as you 
up the frequency.
IIRC directly proportional, so 8x higher than at 50Hz in this case.

In article <1817q6px6ooht.bs73wg29ne85$.dlg@40tude.net>,
   Chris Street  wrote:

> 1496W actually. I round up to the nearest convenient number to be safe -
> as long as it's less than the magic 3.3kW it'll run off a 13A socket....


You've got to be careful about that with single phase motors. Although the
running current may be ok, the starting current will be far higher than
that. In practice, 3 hp is about the limit for an induction motor run from
a 13 amp plug.

-- 
*Drugs may lead to nowhere, but at least it's the scenic route *

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

The message 
from Chris Street  contains these words:


> sounds like my Grandpa's welding set. That was a five litre V8 petrol motor
> driving a honking great gennie that produced DC at tens of kilowatts.


My uncle produced a glider winch from a Jag V12 engine with an automatic
gearbox. Apparently a moment's inattention could pull the wings off.

-- 
Skipweasel.
Ivor Cutler - "Never knowingly understood."

In article ,
   Guy King  wrote:

> > About 3 years ago(!) - testing aircraft systems (hence the 400Hz) on the 
> > ground. 

> 400Hz to make transformers lighter and more efficient, yes?


It does, but would be a pain domestically. When a transformer vibrates
with 50 Hz, you get an audible 100 Hz - usually. The same thing with 400
Hz would put it at 800 - slap bang in the middle of the most sensitive
part of the human hearing curve.

-- 
*Be nice to your kids.  They'll choose your nursing home.

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

Guy King wrote:

> The message 
> from Chris Street  contains these
> words:
>
>> sounds like my Grandpa's welding set. That was a five litre V8
>> petrol motor driving a honking great gennie that produced DC at tens
>> of kilowatts.
>
> My uncle produced a glider winch from a Jag V12 engine with an
> automatic gearbox. Apparently a moment's inattention could pull the
> wings off.


On Robby Coltrane's TV show he found someone in the US with a Chevy V8 
connected to an air raid siren. It used full power to drive the thing.

And they worry about loud exhaust pipes...

In article , dave@davenoise.co.uk says...

> In article ,
>    Guy King  wrote:
> > > About 3 years ago(!) - testing aircraft systems (hence the 400Hz) on the 
> > > ground. 
> 
> > 400Hz to make transformers lighter and more efficient, yes?
> 
> It does, but would be a pain domestically. When a transformer vibrates
> with 50 Hz, you get an audible 100 Hz - usually. The same thing with 400
> Hz would put it at 800 - slap bang in the middle of the most sensitive
> part of the human hearing curve.


Would that explain the bloody whine I can always hear in aircraft, normally 
over the tannoy system?

Pete.

-- 
NOTE! Email address is spamtrapped. Any email will be deleted
Remove the news and underscore from my address to reply by mail

In article ,
   Pete Smith  wrote:

> > It does, but would be a pain domestically. When a transformer vibrates
> > with 50 Hz, you get an audible 100 Hz - usually. The same thing with
> > 400 Hz would put it at 800 - slap bang in the middle of the most
> > sensitive part of the human hearing curve.

> Would that explain the bloody whine I can always hear in aircraft,
> normally over the tannoy system?


Could be. A tannoy system for speech only or musak wouldn't need to go
down as low as 100 Hz. So if they used an amp with poor (or faulty)
filtering from the supply it could well be the 800Hz.

-- 
*I'm not a complete idiot, some parts are missing *

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

The message <w8sDe.2927$Pf3.1460@fe2.news.blueyonder.co.uk>
from "PC Paul"  contains these words:


> On Robby Coltrane's TV show he found someone in the US with a Chevy V8 
> connected to an air raid siren. It used full power to drive the thing.


If it was this one - 

http://www.victorysiren.com/x/main.htm

then it wasn't home made, it was a Chrysler product!

-- 
Skipweasel.
Ivor Cutler - "Never knowingly understood."

The message 
from Pete Smith  contains these words:


> Would that explain the bloody whine I can always hear in aircraft, normally 
> over the tannoy system?


No, that's the nervous passenger sitting behind you.

-- 
Skipweasel.
Ivor Cutler - "Never knowingly understood."

Guy King wrote:

> The message <w8sDe.2927$Pf3.1460@fe2.news.blueyonder.co.uk>
> from "PC Paul"  contains these words:
>
>> On Robby Coltrane's TV show he found someone in the US with a Chevy
>> V8 connected to an air raid siren. It used full power to drive the
>> thing.
>
> If it was this one -
>
> http://www.victorysiren.com/x/main.htm
>
> then it wasn't home made, it was a Chrysler product!


Sorry didn't make it clear - it was an official one, just not many left in 
working order.

The lift could be a Bradbury Four post 'WheelFree' lift.

The car is driven onto the platforms. The lift is then raised.
Two beams (on rollers) run the length of the car. These can then be
positioned to allow the car to be lifted off its wheels.
The beams are then locked at the desired height.
The platforms are lowered. The car is up in the air with the wheels
hanging free.

The one we had gave us many years of reliable service.

In article , 
motforum@btinternet.com says...

> The lift could be a Bradbury Four post 'WheelFree' lift.
> 
> The car is driven onto the platforms. The lift is then raised.
> Two beams (on rollers) run the length of the car. These can then be
> positioned to allow the car to be lifted off its wheels.
> The beams are then locked at the desired height.
> The platforms are lowered. The car is up in the air with the wheels
> hanging free.
> 
> The one we had gave us many years of reliable service.


Stop rubbing it in! I don't have a garage to put it in :-(

Pete.

-- 
NOTE! Email address is spamtrapped. Any email will be deleted
Remove the news and underscore from my address to reply by mail

"Pete Smith"  wrote in message 
news:MPG.1d4a08df4a08df41989765@usenet.plus.net...

> In article ,
> motforum@btinternet.com says...
>> The lift could be a Bradbury Four post 'WheelFree' lift.
>>
>> The car is driven onto the platforms. The lift is then raised.
>> Two beams (on rollers) run the length of the car. These can then be
>> positioned to allow the car to be lifted off its wheels.
>> The beams are then locked at the desired height.
>> The platforms are lowered. The car is up in the air with the wheels
>> hanging free

I've got one of these, bought it for 100 eighteen months ago
Three phase motor on it as well, but a couple of capacitors and a motor 
start relay from a scrap motor, and it happily runs on single phase. Do a 
google search for "3 phase convertors" for details.

On Wed, 20 Jul 2005 12:47:16 +0100, Dave Plowman (News) wrote:


> In article <1817q6px6ooht.bs73wg29ne85$.dlg@40tude.net>,
>    Chris Street  wrote:
>> 1496W actually. I round up to the nearest convenient number to be safe -
>> as long as it's less than the magic 3.3kW it'll run off a 13A socket....
> 
> You've got to be careful about that with single phase motors. Although the
> running current may be ok, the starting current will be far higher than
> that. In practice, 3 hp is about the limit for an induction motor run from
> a 13 amp plug.


Pah. Big cap and a slo-blow fuse it'll be alright....:-)

(for those trying - this is not the best of ideas....)