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Date: Mon, 11 Feb 2008 11:32:24 -0500
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Rotor 'slinging'; was Rotor Weight Codes
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Phil White wrote:
>    This all results in a 'slinging' movement of the rotor, both up and 
> down and sideways, but it is all smoothly circular; no starting and 
> stopping like a piston.
The original point I was trying to make was that just 1/4" lb at 2000RPM 
would make large forces.  Please forgive me for mentioning 
"reciprocating".  I understand that it is a fighting word around here 
8*).  It isn't reciprocating, it is an off-center spin.  But as my 
washing machine with its weak springs demonstrates, an off-center spin 
can still shake the house.  Washing polyester shirts, instead of cotton 
jeans, makes the shaking much less.