Power Loss Issue - Please Help

[sashheli]

Hello everyone... thanks ahead for reading. I'm new to B400, and to the hobby, but i really like how she flies and how much more input she needs on the controls.

I had a minor crash, so i replaced feathering shaft and the main shaft, But now as it flies it starts loosing power mid-air and kind of winds itself down. Seems to have enough power on the startup... Any ideas or thoughts?

Is it Motor? Or something got overtightened on rebuild?

Battery is fully charged.

[aranciata]

hello.
the problem can to be much...
I advise of change the battery, i look much battery to be full, but it isn't true. I don't know your charger , but i advise to take good charger for lipo that to mark " milliamper-hour" (mah) of LOAD . Much lipo become to be " HARD " ( much milliohm inside , that down capacity total).
The motor and ESC, i don't think....( ESC check your motor to start with sound "beep-beep " ,ecc.)
check your servo are good and NO SHORT -CIRCUIT or wire servo are good.
check your servo NOT FORCE with movement (to be free and speed)
check your pinion if is good close on motor shaft .
check your OBW if is good and check your main gear ( NO TOOTH BROKEN ) , check your OBW shaft is good.
check your main bearing on main shaft.
check to couple good between pinion and main gear.
This , to be thing you check...
i hope that this ,help you...

[sashheli]

Originally Posted by aranciata

hello.
the problem can to be much...
I advise of change the battery, i look much battery to be full, but it isn't true. I don't know your charger , but i advise to take good charger for lipo that to mark " milliamper-hour" (mah) of LOAD . Much lipo become to be " HARD " ( much milliohm inside , that down capacity total).
The motor and ESC, i don't think....( ESC check your motor to start with sound "beep-beep " ,ecc.)
check your servo are good and NO SHORT -CIRCUIT or wire servo are good.
check your servo NOT FORCE with movement (to be free and speed)
check your pinion if is good close on motor shaft .
check your OBW if is good and check your main gear ( NO TOOTH BROKEN ) , check your OBW shaft is good.
check your main bearing on main shaft.
check to couple good between pinion and main gear.
This , to be thing you check...
i hope that this ,help you...

Thank you very much! I'll run down your list.

Main bearing may be the issue... probably got damaged in the crash... and once heats up causes too much traction.

Battery should be fine... Only has 4 flights on it, and i check it before flights with meter.