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Prop balancing

 
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nico(at)cybersuperstore.c
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PostPosted: Tue Apr 17, 2007 6:36 am    Post subject: Prop balancing Reply with quote

Interesting article I found on the Rocket list. It might be useful to all owners.

Thanks
Nico





After weeks of trial and error, I have finally reached a point where I can safely say that clocking the prop doesn’t just make a difference, it makes ALL the difference.

Several weeks ago I set out on a mission to run to ground a vibration in my RV-8. An IO-540 C4B5 with a Hartzell 2 blade prop. There has been a vibration that I would characterize as objectionable. Common on big engine Rockets and RV’s. The lower the RPM, the more objectionable it was.

I was able to instrument the plane and do some real tests and get real results with real data. The net of it is that by changing the prop clocking, I was able to improve my vibration by 83%. And no Im not kidding. You can read all the details here. http://www2.mstewart.net:8080/super8/index.htm

I captured a lot of data. I sure hope others find it useful. I have a new plane as a result.

Best,
Mike
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