Appears somewhat similar in concept to the
SpinTech muffler using baffles/ladders to break up the sound wave front. The
thing I would wonder about is whether those ladders which appears to stretch
across the diameter of the tube could withstand the pulse pounding from the
rotor. My experience with the turbo 13B (with no exhaust splitters) would
indicate it might not long withstand that pounding. But, I could be wrong
about that.
Guess you’re going to have to buy
one and let the rest of us know, Mark.
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Mark Steitle
Sent: Friday, January 16, 2009
9:05 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] DNA Muffler
Does anyone on the list have any real-life rotary experience
with the DNA Gen II muffler (http://www.dnamufflers.com/DNA/main_DNA.html)? It is an interesting design in
that it has no packing material to burn out. Instead, it utilizes
ladder-rungs, which they call "internal sound diffusers", which
resemble a chain of DNA down through the center of the muffler body, which is
made of 304 SS. Their web site claims that the racers use them with great
success. From speaking with a sales rep, they claim there the rotary
crowd uses them too. I'm considering purchasing one of their FULL
THROTTLE COLLECTOR mufflers (P/N 1040), but thought I would check to see
if anyone else has used this style muffler. This muffler has a 3"
inlet/outlet with a 4" body. So it is compact enough to fit
inside my cowl. My exhaust header has a 3" swivel joint, so it
should be a good fit.