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Ok, I put a Neu 1105 3y in my Rex last week.
Im running Flightpower Evo20 3s 2150.
11 tooth pinion, 100% in idle up.
I flew 2 initial flights of 12 minutes with only very slight power loss in the last 30 seconds, just hovering.
From memory it used about 1900mah.
So I set my timer for 11 minutes for around 80% battery capacity.
I flew 2 packs yesterday, 90% hovering around.
First pack sagged at about 10 minutes, landed and stopped at 11.
Second pack also sagged at 10, gave up.
I just charged these packs, and both took back between 2050-2100mah.
Voltage was 10.3 and 10.6.
Ive taken the motor out and it turns freely with no end play.
There appears to be no new drag evident in the driveline either.
I changed nothing between flights.
Judging by my first flights Im using 158mah per minute, so 11 minutes should give me 1741mah which is around 80% pack capacity.
Im at a loss as to whats going on.
For the love of the hobby