Mailing List flyrotary@lancaironline.net Message #48392
From: Kelly Troyer <keltro@att.net>
Subject: "20B/13B Exhaust Inserts" was Quiet is Deafening
Date: Thu, 01 Oct 2009 18:37:27 +0000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Mark,
  Has anyone ever explained the reasoning for the odd "D" shape of the stock "Cosmo" 20B/13B rotor
housing exhaust inserts ??.....................Inquiring minds want to know !!..................
--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold



 
-------------- Original message from Mark Steitle <msteitle@gmail.com>: --------------

I may end up with a turbo, but I'm hoping the tangential muffler will work well enough to keep that option off the table.  I'm also building a new p-port engine to replace the stock 3-rotor, so I really don't anticipate needing any more hp.  This time I plan to leave the stock exhaust splitters in the rotor housings. 
 
Mark

On Thu, Oct 1, 2009 at 11:02 AM, John Slade <jslade@canardaviation.com> wrote:
>What kind of muffler are you running?  Is it working? 
Its a Turbonetics T04 turbo, and yes, it works quite well.  Also has a few other side benefits. :)
Of course, building the airplane out of foam and fiberglass rather than metal helps deaden the vibrations too.
Regards,
John


Mark Steitle wrote:
John,
 
What kind of muffler are you running?  Is it working? 

Mark
On Thu, Oct 1, 2009 at 10:48 AM, John Slade <jslade@canardaviation.com> wrote:
>You just need to fly at Mach 1 so you stay ahead of the sound.
No need to go Mach 1. Just put the engine on the back, where it's supposed to be. :)


--

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