small vivration

[john john melon]

i have a t-rex pro 600 and every time i start it and give it gas about 1/4 of stick the heli start to have a small vivration on the frame. is there a trick that it can make it go away???? any help would be appreciated

[fiveoboy01]

Well if it's only happening at low throttle, sounds like a possible issue with your clutch/hub/fan assembly. Did you check the balance on them? At low throttle those are still spinning at pretty good RPMs.

[invertmast]

just the frame is vibrating? is it a slow wobble or a fast buzz vibration>?

[john john melon]

it a slow wobble @ 1/4 stick and then a moder wobble, but now it goes away when i hit the 3D button on the control.

[fiveoboy01]

Hmm that sounds like something else then. If it's a lower frequency vibration, make sure your blades are balanced, it could also just be a wobble at startup while the main rotor blades straighten themselves out. Check your mainshaft to be sure it's not bent.

[invertmast]

i bet your running this 80 or 90 duro dampers aren't you? If so, its normal.

[john john melon]

duro dampers??? not sure what that is but i will read up on it. Thanks for the help.

[invertmast]

duro = durometer IE how stiff or soft the dampers are.

what dampers did you install in the head when you built it?