The supertrap is a flame arrestor required in some forrest locations. It is a stack of rings with a small space between each one. About three sets of discs minimum to get the back pressure down. Comes in smaller tube sizes. Gave mine away when I went to 4" pipe. Worked OK at 105 dB. Needed a mufler in front of it to get down to 103 dB. It is stainless and give no trouble. It needs to be in the open air to work.

 

Lynn E. Hanover

 

 

 

Has anyone ever tried using a Supertrap on the rotary? Was talking with a
guy this last weekend at the local EAA chapter meeting. Said he used to race
an RX-7 and swore that the Supertrap quietted the beast and held up under
the pressure. I'm skeptical but have had good luck with Supertraps on
motorcycles and various hot rods. Maybe a custom built "super Supertrap"
with 321 stainless or even Inconel discs? Might be worth a try.

One thing is certain. My "muffler" isnt (a muffler that is). I need
something better.

Mike Wills
RV-4 N144MW