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Jerry,
I have used the Jet Hot coatings and can assure you that they do work! If you decide to coat a muffler like the one shown you should mask the cool tube, and only coat the outside. OR Ed flange the next one so the tube can be removed and coat the muffler inside and out then slide the tube back in and clamp it in place. You would see at least a 20-30°F difference in inside cowl temps.
Bill Jepson PS. Be sure to get the HIGHEST HEAT COATING if you do it. Several of the coatings won't hold up to rotary ex temps.
In a message dated 3/8/2005 3:33:08 PM Eastern Standard Time, Jerry Hey <jerryhey@earthlink.net> writes:
Thanks for your comment Ed. The cool tube is intended to extract a
lot of that heat and pump it overboard. We shall soon see if it works
as Bob White will be running his engine soon. I got my fingers
crossed.
On Tuesday, March 8, 2005, at 03:17 PM, Ed Anderson wrote:
Jerry, Tracy Crook flew with a similar Tangential muffler for a number
of
hours. The neat thing is it does fit under the cowl and suppress sound
nicely, the un-neat thing is it acts like a large oven under the cowl
and
keeps cowl temps highly elevated. I am fairly certain that is why
Tracy
removed it.
Ed A
----- Original Message -----
From: "Jerry Hey" <jerryhey@earthlink.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, March 08, 2005 3:01 PM
Subject: [FlyRotary] Tangential muffler
From the "other" list comes the report that someone has tested a
similar exhaust system to what I have been building on his PowerSport
p
ported engine. . He reports the muffler worked well to quiet the
exhaust note and that the engine seemed to breath freely. The neat
thing about this exhaust system is that it fits inside the cowl.
Here are a couple of photos showing the muffler on a Mustang 2. The
muffler is 6" o.d. x 10 inches long. Construction is 321 16 gage.
The cool tube running through the center is intended to cool the
exhaust gas. Fresh air is plumbed through it. The engine mount is
the S-beam. Jerry
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