anyway my maiden was a complete #+/+#

[noste500]

There I was breaking the motor in when -
3 tanks through/ no high revs/ mega rich.

I landed , the engine would not rev.it would only just tick-over.
Brought heli inside for closer inspection.

Pin through bottom of shaft had broken. I have the 2 pieces.
I think the head must have lifted up with pitch input and the moved the gear around, ( oscilating )-
anyway just my luck- the gear ( or the shamfered part of the metal section at the bottom of the gear ) catches the frame whilst in flight , then it grinds away apiece on both sides of the frame and ALL the carbon dust goes into my fan and gets sucked into my brand new OS91.

I have stripped the motor and the back bearing has gone.

Thing is though, I did not over tighten the holding pin in the main shaft. it is still in situ.
Also the pin has not broken in the middle, its more than 2/3 to one side!

Can I replace this with a conventional jesus bolt to be sure it cannot happen again??

I have calmed down abit now and cleaned all the carbon from everywhere.

[flyanything]

If your main gear was rubbing on your frame, make sure you check the orientation of your bearing blocks:

http://www.avantrc.com/support/showthread.php?t=454

I noticed a very slight rubbing during my build and it turned out to be a reversed bearing block.

John

[noste500]

Hi,
I checked all of the bearing blocks. they were correct.
It was a different problem. the pin through the main shaft has broken, retaining screw still in place. I even checked the thread was correct for the retainer screw. It was the bottom of the gear aluminium block that had ground on the frame.
I am going to pm Augusto as I still have the pin and shaft.

Cheers

[Airboss]

glad to hear you got it down in one peice and damage was minor.