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Message
I am using 2 1/8" dia .035 wall
thickness 304 SS. Forgot to mention that each 4 foot muffler weighs 6
lbs 8 oz. I could probably knock that down to a bit over 4 lbs each
on the next one. I might also shorten it from 48" to 36". I believe that
going to a 3" dia tube would work even better - but $$ start to go up pretty
quickly with those sizes - also couldn't find any 3" dia discs of the right
thickness and reasonable prices.
No drawings of the discs at this point, they
started out as 2" dia SS washers for 1/2" bolts. Also we'll have to
see how well they hold up. The last time I purchased a header insert
(which did reduce the bark) made of mild steel, the exhaust had reduced them to
1/2" chucks of twisted metal in about 1 month time.
By the way, Rusty, do you think you might try to
make the RV flyin at LakeLand in Jan??
Ed
----- Original Message -----
Sent: Tuesday, November 30, 2004 5:32
PM
Subject: [FlyRotary] Re: New Muffler
Design
The mufflers consider of two 2" dia tubes 4' long
with sound attenuating discs inserted. Each muffler hangs off of my two
header pipes and extend back under the fuselage with the exhaust exit dumping
behind the cockpit area.
Sounds
interesting. What are the tubes made of (mild steel, 321 ss, etc)?
Any drawings of the discs? I'd love to eliminate the weight and drag of
the Spintech, but it sure does hold up well. Good luck with the new
design.
Rusty
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