Mailing List flyrotary@lancaironline.net Message #29589
From: Russell Duffy <russell.duffy@gmail.com>
Subject: flywheel weight?
Date: Fri, 20 Jan 2006 11:51:36 -0600
To: Flyrotary List <flyrotary@lancaironline.net>
Message
Greetings,
 
Yes, I'm trying to avoid spending too much time on this, but I'm tempted to try adding more significant flywheel weight to the single rotor, to see it it will behave better.  I realized this isn't an ideal solution to an already heavy engine, but it might still be worth trying. 
 
My question is how much weight should I add to make sure this will get rid of the torque reversal issues? 
 
I understand that weight added farther out from the center has more effect than weight close to the center.  Ideally, I would plan to make a ring, with about an 11" OD (or as large as I can without interfering with the starter ring), and about 7" ID.  This would bolt to the redrive side of the dampener plate, using the existing 7/16" bolts.   I made an estimate of the weight of steel, by measuring the volume of a 4130 plate, and weighing it.  The result was 4.5 oz per cu in.  My best estimate is that I can get close to 10 lbs, using a half inch thick piece of steel.  Unfortunately, this will be quite time consuming, and tough to fabricate, balance, etc. 
 
The other option is to try to add more weight than I did before at the 4 bolt locations.  This is a much easier plan to implement, but I'm afraid I'll be lucky to get 5 lbs added using this method. 
 
Anyone want to take a swag at how well this would work? 
 
Thanks,
Rusty (resistance is futile)
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