"Bass, Jerry" wrote:

I just tested a Resonator [sausage like tube, with holes on the inside but
not through the skin] on the ends of my exhaust stacks.  I like it. On a
quick test last night, I was able to get 7000 rpm, and still talk on the
radio.  The tower man said loud and clear!  WoW.

The overall noise was down, and the engine performance was up. I climbed out
at 120 knots and 1800 fpm ROC. No sound data yet, but just a strong feeling.

The Resonators are about 13" long, with tube connections on each end. I got
them from Midas, two years ago.  I did not know where to put them as they
are longer than will fit into the engine room. They do not have any blockage
inside the tube, longitudinally.

Jerry Bass

Keep checking them Jerry for signs of internal collapse. If they do
perhaps you can copy them in .050 stainless steel.

BTW what psru ratio are you running? We really need some pictures of your
airplane and engine installation. Can you make it to Sun & Fun?
If not where are you?

Paul Lamar

Don Dunbar wrote:

Don
What type plane was this tested in?  traction or pusher.

Don Dunbar

I think it is a Whitman Tailwind. Tractor.

Paul Lamar
 
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