Hi,

Am thinking about getting an electric trainer such as Multiplex
Magister.

Is it possible to re-charge the Li-Polymer cells in the field using an
SLA or car battery?

If so, how long would this take?

Cheers,

Kenny

Kenny wrote:
> Hi,
> 
> Am thinking about getting an electric trainer such as Multiplex
> Magister.
> 
> Is it possible to re-charge the Li-Polymer cells in the field using an
> SLA or car battery?
> 
> If so, how long would this take?
> 
> Cheers,
> 
> Kenny
Full recharge between 1 hour and 1 hour 40, depending on the charger 
algorithms.

Best practical approach is:-

Have more than one pack

Make them quite large, - 40 minutes+ duration on a trainer is not 
impossible.

Recharge them before they are flat.

With a couple of decent sized packs you can fly for an hour and a half 
total. Before recharging: with a field charger that can be sretched to 
about 2 hours total non stop.

If you fly a series of 6-8 minutes 'sorties' with ten  minute gaps 
between, and recharge constantly, its likely that you can get around 20 
plus flights in.

When I fly with people the pattern tends to be

Coffee and charge anything that needs it.

About an hour and a halfs flying till everybody is a bit 'drained'

Recharge and have more coffee, discuss flights, repair minor damage, 
evaluate flights. Eat sandwiches.

Have another hour or two's flying.

Pack up an go home. Or down the pub.