Bryan, My two Hushpower
mufflers are outside the cowl, slung under the fuselage just in back of the
bottom cowl opening. One muffler for each
rotor.
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Bryan Winberry
Sent: Friday, July 10, 2009 8:15
AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Flowmaster
Hushpower Report
Ed,
Is yours under the
cowl? I’m thinking proximity to heat source is the primary factor
here.
Bryan
Unless yours is under
the cowl. In that case, it’s the plugs up orientation that keeps yours
cool :>)
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Ed Anderson
Sent: Friday, July 10, 2009 7:26
AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Flowmaster
Hushpower Report
Hummm, I’ve had my
two HushpowerII mufflers on for around two years now and can’t tell of any
deterioration. I’ve never noticed any of the stuff that you and Mark
Steitle have found and the innards still seem in one piece. The
difference is I use two HushpowerII mufflers perhaps reducing the exhaust
stress on them? Plus Mark had three rotors pushing through one and you
have the turbo - although I would think the turbo would absorb some/most of
the stress.
Let us know how the
new muffler works out, Dave
Ed
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of David Leonard
Sent: Thursday, July 09, 2009 10:39
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Flowmaster Hushpower
Report
For the last couple hundred hours I have been using a
Flowmaster Hushpower II muffler. Also used by Tracy and some others I
think. It is done. The outside held up wery well, but I reciently
removed it and discovered that the insides have entirely disientigrated.
Whatever they used as packing has turned to a heavy clay-like substance
ratteling around in the bottom. She steel mesh is in pieces.
I had been thinking that the plane was not as quiet as it seemed 2 years
ago.. go figure.
So I was thinking about one of the DNA Mufflers
someone mentioned. They seemed nice because there is no
packing, just steel dividers. Unfortunately, it is a little to big
around to fit in my current set up. Instead, I ordered this
muffler that also has steel innards but no
packing:
It is nice because it is going to be smaller and
lighter than the flowmaster (or the DNA), as well as less expensive - even the
SS version that I ordered.
Will report back in 2 years on its
performance :-)
--
David Leonard
Turbo Rotary RV-6
N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
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