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