Tweet
Hi All.
Had my first crash on the weekend. (Trex500EFL) Really disappointing as just rolled over on take off and not really sure why. 3rd flight of the day it started rolling left. I back off and it settled and took off no problems. 4th flight it rolled right I backed off but too late and the blades hit.
Have done about 45-50 flights, last dozen with no training skids. I have 2 thoughts why it went bad.
1st) The training skids put a wobble through the heli so I had to turn the Gains down a lot to stop bob. With out them I was slowly increasing the gains (Aileron and Elevator) to trim to the new setup. Currently on 12 O'clock on the 3GX box. Read the 3Gx settings after the crash and both total gains on 70. Would too high a Aileron gain make it tip on take off?
2nd) When going from idle up to normal to land I felt the head speed was to low. Made it not so easy to land. So I increased the throttle curve to 0,50,75,85,95 and pitch was left the same 30,35,50,75,100. In idle up pitch is 0,25,50,75,100. I raised the normal mode pitch so I couldn't get too much negative pitch when landing. center stick is 0 pitch. Afterwards was thinking maybe the throttle curve is too step and will have 50% power at -3 deg pitch. Did this cause the problem? It seem to start to roll a long way before it was close to taking off.
I think I read you shouldn't use any stick inputs with the 3Gx until it is airborne as can mess it up. Shouldn't the swash plate level itself? I carried it to take off point after tuning on. Can this mess it up? Really not sure why I crashed and what to do to prevent it in the future which is the frustrating part.
Stripped 3 servos, bend tail boom, very slight bent main shaft, landing gear, bearing in tail boom unit. Link rod x1 Main blades just a few scratches on the tips and small ding when it folded back into blade grip. I think repairable. Fairly major rebuild. Canopy didn't have a scratch on it. Was surprised at how much damage got done under the hood.
any thoughts greatly appreciated.
cheers
Had my first crash on the weekend. (Trex500EFL) Really disappointing as just rolled over on take off and not really sure why. 3rd flight of the day it started rolling left. I back off and it settled and took off no problems. 4th flight it rolled right I backed off but too late and the blades hit.
Have done about 45-50 flights, last dozen with no training skids. I have 2 thoughts why it went bad.
1st) The training skids put a wobble through the heli so I had to turn the Gains down a lot to stop bob. With out them I was slowly increasing the gains (Aileron and Elevator) to trim to the new setup. Currently on 12 O'clock on the 3GX box. Read the 3Gx settings after the crash and both total gains on 70. Would too high a Aileron gain make it tip on take off?
2nd) When going from idle up to normal to land I felt the head speed was to low. Made it not so easy to land. So I increased the throttle curve to 0,50,75,85,95 and pitch was left the same 30,35,50,75,100. In idle up pitch is 0,25,50,75,100. I raised the normal mode pitch so I couldn't get too much negative pitch when landing. center stick is 0 pitch. Afterwards was thinking maybe the throttle curve is too step and will have 50% power at -3 deg pitch. Did this cause the problem? It seem to start to roll a long way before it was close to taking off.
I think I read you shouldn't use any stick inputs with the 3Gx until it is airborne as can mess it up. Shouldn't the swash plate level itself? I carried it to take off point after tuning on. Can this mess it up? Really not sure why I crashed and what to do to prevent it in the future which is the frustrating part.
Stripped 3 servos, bend tail boom, very slight bent main shaft, landing gear, bearing in tail boom unit. Link rod x1 Main blades just a few scratches on the tips and small ding when it folded back into blade grip. I think repairable. Fairly major rebuild. Canopy didn't have a scratch on it. Was surprised at how much damage got done under the hood.
any thoughts greatly appreciated.
cheers
Comment