Mailing List flyrotary@lancaironline.net Message #37717
From: George Lendich <lendich@optusnet.com.au>
Subject: Re: [FlyRotary] Re: Single rotor video
Date: Wed, 6 Jun 2007 08:21:06 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Rusty,
If at all possible, I would consider the harder dampers, you can buy the polyurethane off the shelf and turn it up in a lathe to make the size/ shape you require.
George ( down under)
What a great video. I ran it in slow motion.  
 
Hi Al,
 
I never thought about running this in slow motion, but holy crap!!!  
 
For the dialup folks, here are a couple frames from the video, when the engine was probably around 2500 rpm.  These are sequential frames, so only a 30th of a second apart.  Take a look at the blade flex, but then note the position of the engine from rotational torque.  It's undeniable that this is a torque reversal issue.    
 
Before I change dampers, I may make another video at more controlled rpms, and with the camera zoomed in on the engine/prop more. 
 
Rusty (creating a monster)


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