New Tail GearBox

[Sluggo]

Hey thanks Chris! As for your rods snapping I would think you have a high vib going on as David said. I would check to make sure all your tail parts are straight and well balanced. Also make sure to check your input shaft if you have crashed the heli before. I have seen them bend a little in a crash and will cause high frequency vib. Are they breaking on the front or the back of the rod?

I needed a threaded end one time for a spare tail push rod. I couldn't find the right rod so I used a 70mm robbe frame bolt and cut the head off. I knurled the end of it before jb welding it in. These bolts are very hard and have a nice long shank with very little thread on them so it worked perfect.

[King Cobra]

It must be a notch in my tail shaft, It broke in the front rod. Or could be the dual bearing on the torque tube. Thanks again

[Dr.Ben]

I agree, Chris. Unless that 3mm rod was pre-fatigued from bending, and I know you didn't do that, there must have been a pretty wicked high frequency vibration to cause it to break. The p/r support isn't positioned in a "perfect" position to allow the rod to buzz in flight, is it?

BTW, if you are going to have your FF again this year, please try to set dats ASAP so we all can arrange time off; I have to work some weekends.

Ben Minor

[King Cobra]

Dr. Ben
I have the sanction for the event date is OCt 2-3 . I will try to stay the same weekend every year . Looking forward to having you again .
I didn't bend the rod, but did notice some tail vibration in normal mode with lower Rpm, ID up is smooth, also it could be from a bad set of tail blade

[jrwalte]

Deleted. Stupid tt posted in wrong thread.

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