I have a brushless seperates HB-CP2 setup, with a himax 3600 motor. I had a minor crash this weekend. I was at an indoor fly in an aircraft hanger, and I was dialing in my heli and doing some forward flight. I sent it out ok, but turning her around and bringing her back I got disoriented (I was running without the canopy on, and I couldn't tell from that far away what the tail was doing). I shut down the motor about two feet in the air because I was afraid I was going to hit the walls, so the heli came down in its training gear and popped off the rear rotor before sliding to a halt, again upright on its training gear. Didn't even do any blade damage, everything else looked ok. I was going to fly again, except it threw the tail gear underneath this big hanger door and it fell down the track where I couldn't get it.
So today I get my tail gear from mail order, and I put it on, and start to spin it up. A screetching noise came from the motor so I shut it down. I look at it, and the shaft has dropped out of the motor to the point that the pinion no longer contacted the gear.
My question is twofold: Am I completely boned here, or can this thing be repaired? I don't see any obvious way to get into this motor to check it out, and I don't want to start experimenting with ways until I know something can even be done. I don't know how the secure the shaft to the bearings, but there is nothing loose rattling inside the motor, and if I just run it on the bench it work just fine. Put it under load and the shaft pops right out.
Second question: If it can't be repaired, are brushless motors this fragile, or have I experienced something very rare? TIA!