|
Well, the other big question is does it actually
muffle? If the best thing that can be said about it is that it's surviving
I'd be a little disappointed. I know its hard to judge but how about your
opinion regarding the volume?
Thanks,
Mike Wills
----- Original Message -----
Sent: Monday, March 09, 2009 8:38
AM
Subject: [FlyRotary] Re: DNA
Muffler
"sounds good" Mark. My guess is that the 2" restrictor is
in the correct place now. Don't think it would be as effective before
the muffler.
But the big question is, did the 3 to 2 " reducer cause
any noticeable power loss? I plan to do the same thing on my plane
when time allows.
Tracy
On Mon, Mar 9, 2009 at 8:08 AM, Mark Steitle <msteitle@gmail.com> wrote:
Mike,
It may be a little premature to declare it a winner, but with ~10 hrs
on it now, it is holding up better than anything I've tried so far.
Keep in mind that this is DNA's best muffler, rated for 1000hp.
It is made of fairly thick SS, .030 if I recall, much thicker material
than most mufflers. I had to add a 3" to 2" taper to
the outlet in order for it to be acceptable in the noise category, but
that was surprisingly effective in reducing the exhaust noise
to an acceptable level. (Maybe I should have just put the reducer
on the 3" downpipe and saved some weight.) Anyway, when it passes 25
hours, I'll post another update. At this time it is looking very
promising.
Mark S.
On Sun, Mar 8, 2009 at 9:20 PM, Mike Wills <rv-4mike@cox.net> wrote:
Mark,
Any update on the DNA
muffler?
Mike Wills
RV-4 N144MW
-----
Original Message -----
Sent:
Friday, January 16, 2009 7:05 AM
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.
Mark
S.
|