Mailing List flyrotary@lancaironline.net Message #44633
From: <wrjjrs@aol.com>
Subject: Re: [FlyRotary] Re: 20B install issues overcome
Date: Mon, 05 Jan 2009 17:00:03 -0500
To: <flyrotary@lancaironline.net>
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Ernest,
Setting up the band gap tubes to flow air thru would be a good idea. Feeding that air into the downstream flow as we were talking about with the cool tube would also be a good way to get the pumping for free.
Bill



-----Original Message-----
From: Ernest Christley <echristley@nc.rr.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, 5 Jan 2009 12:23 pm
Subject: [FlyRotary] Re: 20B install issues overcome

wrjjrs@aol.com wrote: 
> Earnest, 
> I believe that the SuperTrapp muffler is an example of a band gap > device and it worked well, if properly tuned. 
> I think the large block idea has merit too, but you will have to allow > enough thickness to prevent the tubes that see the exhaust first to > fight the harmonic vibration and heat. Different size diamonds in the > exhaust stream might also help fight harmonics. 
> Bill Jepson 
I haven't given it enough thought to have an actual plan, other than a canister with tubes oriented to allow a flow of cooling air. 
 
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