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How long to charge Li-Polymer between flights?

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Kenny - 26 Nov 2007 10:46 GMT
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
The Natural Philosopher - 26 Nov 2007 11:11 GMT
> Hi,
>
[quoted text clipped - 9 lines]
>
> 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.
 
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