3D WASP
Veteran
Location: Home of the Reagan Library, CA
| I've got 7 sets of front tail gears. Every last one of them is bent. All of the flat gears (that run up against the big autorotation gear) are not on the shaft straight. They all orbit around the shaft and cause a vibration, not to mention a nasty noise say around 100rpm. The bevel gear that the torque tube goes into is not centered either. This causes a terrible vibration as you could imagine when the tail is spinning at 10,000 rpm. I've got the best combo I could come up with in the heli right now and it still vibrates like a motha F#$%er. This all after I made a custom torque tube out of a synergy torque tube. Why the custom torque tube? You guessed it, two brand new ones bent, right out of the packaging. I think they had too tight of press with tt ends, so when they pressed them in it bent. These 7 sets of gears came from 2 different hobby shops, I think I've got 5 sets of gray and 2 in white. The torque tube I could fix myself, but these gears you can't really do anything with. I've got the gyro mounted in the back, and at 29% the tail wags due to all the vibration. I'm going to move it to the front on top of the servos to see if that gets rid of the wag. Which is only a disguise, I really wish I could just go buy a straight set of gears and a TT that was too straight. But I'll have to wait til my LHS' get some more in stock, who knows maybe those parts will be from a different batch and they'll be straight? I can only hope.
Also, not to go off topic, but my main bearings dont fit the main shaft to well either. With everything tight I can rock the main shaft front to back. Two new main shafts and new bearings and I get the same thing. The tolerances are just off a hair, but thats all it takes. And I'm sure its not helping my tail wag. Other than that this heli kicks A$$, awesome practice helicopter.
Timing is everything |
