ORIGINAL: spaceworm
Some CF props have been reported to have "soft" centers, like some chocolates and some people. How do you tell and how should the tightening torque be adjusted if the centers are "soft"?
Thanks.
Richard
@ TOM,
Thanks for posting.
@ Richard
Torque resistance of thepropis a requirement in an engine. If the soft center does not allow enough clamping force to achive the required torque resistance, that prop is not suited for the engine. Relaxing tightening torques is not the way to do it and will lead to desaster. Larger prop washers will increase clamping surface, and then 'maybe' will allow the required bolt tightening torque.
I would rather stay away from that brand prop.
This is a picture of the prop heart off an engine that was buried a foot deep in hard loam soil. The sides of the drilled holes show no sign of even touching the bolt threads.