the battery had been depleted so there was not enough juice to power both props.
or you lost the signal. one prop will run when the radio is off and the batteries are weak.
be careful not to touch the antenna too much as the oil from your skin will cause interference.
charging with a nimh charger before you leave for the flight is best and then top off the battery just before flight.
the little batteries are like capacitors in the way that they just deplete themselves as they sit.
i'm getting about 6 minutes from mine.
you can get larger capacity 1/3 aaa cells but, it's not worth the hassle.
the support pack has an extra battery and nimh's for the radio. if you add everything up it's much cheaper than getting the cells individually and then the battery holder.
i charge all my cells with a nimh charger.
check your radio and make sure there is not a loose battery door. they replaced my radio because of that. no matter what i did i had to push the door to make contact.
cool little plane!
philip s.
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