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Date: Thu, 23 Jul 2009 21:27:48 -0700
Message-ID: <1c23473f0907232127u6790880dub9d3717ae9389294@mail.gmail.com>
Subject: Moroso Muffler initial report
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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So I replaced my Hushpower II muffler with this stainless steel Moroso
muffler:
http://www.moroso.com/catalog/categorydisplay.asp?catcode=35054

I really like that it weighs in at only a little over 3 pounds (vs. almost
10 for the Hushpower).  It is also smaller and more aerodynamic. One down
side is that it had to be welded, as it was not the right size to make a
slip fit work in my exhaust system (the hushpower had a nice snug slip
fit).  The Moroso is essentially identical in OD to my 2.5" OD exhaust pipe.

 To me it sounds a little quieter than the Hushpower after all its insides
had burned out, but not as quiet as the Hushpower when it was brand new (I
think the packing probably burned up on the first flight so soon
thereafter).   I have been flying with the burned out hushpower for so long
I just got used to it.

The only place I have flown so far with the Moroso is it to an EAA meeting.
One guy really commented on how quiet it was, which is not a comment I get
very often.  So that is one data point.

The innards held up perfectly well the the 1 hour flight.  I plan to fly a
few more hours tomorrow.  Will keep let everyone know if it ever gives up
the ghost.

-- 
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.netrst

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So I replaced my Hushpower II muffler with this stainless steel Moroso muff=
ler:<br><a href=3D"http://www.moroso.com/catalog/categorydisplay.asp?catcod=
e=3D35054">http://www.moroso.com/catalog/categorydisplay.asp?catcode=3D3505=
4</a><br>
<br>I really like that it weighs in at only a little over 3 pounds (vs. alm=
ost 10 for the Hushpower).=A0 It is also smaller and more aerodynamic. One =
down side is that it had to be welded, as it was not the right size to make=
 a slip fit work in my exhaust system (the hushpower had a nice snug slip f=
it).=A0 The Moroso is essentially identical in OD to my 2.5&quot; OD exhaus=
t pipe.<br>
<br>=A0To me it sounds a little quieter than the Hushpower after all its in=
sides had burned out, but not as quiet as the Hushpower when it was brand n=
ew (I think the packing probably burned up on the first flight so soon ther=
eafter).=A0=A0 I have been flying with the burned out hushpower for so long=
 I just got used to it.<br>
<br>The only place I have flown so far with the Moroso is it to an EAA meet=
ing.=A0 One guy really commented on how quiet it was, which is not a commen=
t I get very often.=A0 So that is one data point.<br><br>The innards held u=
p perfectly well the the 1 hour flight.=A0 I plan to fly a few more hours t=
omorrow.=A0 Will keep let everyone know if it ever gives up the ghost.<br c=
lear=3D"all">
<br>-- <br>David Leonard<br><br>Turbo Rotary RV-6 N4VY<br><a href=3D"http:/=
/N4VY.RotaryRoster.net">http://N4VY.RotaryRoster.net</a><br><a href=3D"http=
://RotaryRoster.netrst">http://RotaryRoster.netrst</a> <br>

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