Martyn
2009-06-27 16:41:16 UTC
Flew my Greensleeves electric glider today, with a new battery, new (2.4)
receiver.
I bought the new LiPo (3 cell) to replace a heavy NiCd/NiMh (7 cell).
New battery was charged last month but never flew (weather too bad).
So I discharged it a bit. And recharged it fully this morning.
Flight was OK but no lift whatsoever so it was pretty much on full power for
the whole flight.
Suddenly, with no warning, I had no control, no power, no nothing.
Felt like someone had unplugged the battery.
Normally when the battery gets low the ESC turns off power to the motor but
I still get control to the flying surfaces (is this the BEC thing?). But
today I had nothing.
Luckily the landing was better than I usually manage when I do have power!
and there was no damage, except a bent spinner.
Now at home I've recharged the battery OK; I now have control but no motor
power at all. I did get one little blip, for half a second, but no more.
My current theories are
1. dodgy connection at the battery, switch or r/x.
2. dodgy brand new, expensive receiver.
3. I've burned out the motor using 11V instead of 8.4V (but why the total
loss of control?)
4. none of the above.
Any clues?
receiver.
I bought the new LiPo (3 cell) to replace a heavy NiCd/NiMh (7 cell).
New battery was charged last month but never flew (weather too bad).
So I discharged it a bit. And recharged it fully this morning.
Flight was OK but no lift whatsoever so it was pretty much on full power for
the whole flight.
Suddenly, with no warning, I had no control, no power, no nothing.
Felt like someone had unplugged the battery.
Normally when the battery gets low the ESC turns off power to the motor but
I still get control to the flying surfaces (is this the BEC thing?). But
today I had nothing.
Luckily the landing was better than I usually manage when I do have power!
and there was no damage, except a bent spinner.
Now at home I've recharged the battery OK; I now have control but no motor
power at all. I did get one little blip, for half a second, but no more.
My current theories are
1. dodgy connection at the battery, switch or r/x.
2. dodgy brand new, expensive receiver.
3. I've burned out the motor using 11V instead of 8.4V (but why the total
loss of control?)
4. none of the above.
Any clues?