Tight auto rotation hub

[darkoroje]

Hello,

I am building the Synergy E5 and I have noticed that the auto-rotation hub is very tight. Even if I test it ouside of the helicopter, by just inserting the auto-rotation sleeve into the hub, I can notice its tightness. The rotation is smooth, but it takes quite a bit of effort to perform it, much more than on my other helicopters. Is this normal?

Many thanks.

[Ross Lawton]

Hi darkoroje,

When new the autorotation assemblies can have a little resistance but they usually bed in after a few flights, the tollerances between the sleeve and the autorotation assembly is very close.

It is advisable to use a light oil in the bearing such as triflow oil to lubricate the bearing.

Hope this helps,
Ross

[Chris Sexton]

It also may be necessary to lightly sand the delrin shims a bit. This is an adjustable area to accommodate tolerance variances.

sent from my Verizon Samsung Galaxy Note 2

[darkoroje]

Thank you

[dpelletier]

Mine was like that after the re-build.
First I had tightened the jesus bolt to much, so I loosened that to barely snug.
After a few flights it is beginning to loosen up, but still has a ways to go.

[Dave Willis]

Mine was tight also. I swapped out one of the Spacers for a Shim that was the right thickness.

Dave

[Greg Jackson]

It's also better that the part is designed to have tighter tolerances then built in slop.   Over time the auto rotation assembly will feel great, whereas a unit with slop will only get worse in my opinion.