So it may be that ( choose one! ) :

- Everything is fine but you are running the LiPo's down too much.
- You are pulling more current from the LiPo's than they can stand
- The pack itself may have a marginal cell

3 minutes and 45 seconds is a little light for the flight times.

I wonder if you have a damaged cell in a pack. If you can do a full cycle on that pack with your charger.
The charger should be able to report the capacity of the battery after a charge, discharge, charge cycle.

Set the discharge as high as the charger can handle. Normally small chargers max out at 5amps, but if you are limited to 2-4 use that instead.


You should pick up some 2200 mah packs ( PM me please! )

I often find that with these RTF's I can enlarge the battery area and stick a bigger pack in.

This ups the flight times.

Anyway it is unlikely that you are over discharging the packs as @ 15c your packs SHOULD be able to withstand 15 amps continuous and 19 amps burst draw.

Do your packs get VERY warm? Or just slightly warm? If the latter you are not drawing too much current from them and the plane is merely depleting them quickly... and bigger packs will help.

If the packs get very warm and/or slightly "puffy" after a flight, your are pushing out too much current, and you really need a larger pack with a higher "C" rating.

The ESC is rated to 25A, so 25A x 11.1v = 277 watts max.

In turn 277 watts divided by 1lb = 277 watts / lb.... which means that you don't need wings to fly this plane at maximum throttle!!!

At high throttle the motors may be capable of putting out more power than what your 1300mAh 15C packs can provide.