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Author Topic: Gyroscopic Progression  (Read 921 times)

Offline Will Moore

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Gyroscopic Progression
« on: September 16, 2013, 06:04:21 PM »
What is the current thinking among the engineers out here regarding
Gyroscopic effects on the airplane from the light electric APC and
Carbon fiber copy cat props we use. 

1. Does rpm have an effect,  is lower better that higher (?) or

2. Is the diameter the more important consideration?

What are the advantages and disadvantages.

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Offline Phil Krankowski

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Re: Gyroscopic Progression
« Reply #1 on: September 17, 2013, 06:30:57 AM »
http://en.wikipedia.org/wiki/Precession

RPM increase will increase the forces.

Diameter increase will increase the rotational inertia, and at a given RPM increase the force.

A diameter increase with a reduction of RPM may or may not increase or decrease the forces involved.

I have not considered how it affects control line flying.

Phil
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Offline Dan Bregar

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Re: Gyroscopic Progression
« Reply #2 on: September 17, 2013, 09:13:20 AM »
In regard to advantages vs disadvantages, I have seen larger dia. can hurt your corners, mostly the squares. Ever notice how some top notch flyers run 3 blade props ? Sometimes the reason is not just for ground clearance.
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