wrote: Well, you could be correct, Mark.=20 However, even looking at the exploded view of the one you posted, = it still looks to me that the only packing shown is the insulation = packing (looks like approx 1/2" thick") around the peripheral of the = shell.=20 Now that is the resonator, while I have the full up muffler - and I = carefully checked for packing because my experience has shown no sound = absorbent packing will last more than a few hours with my engine. I = could detect no packing material by shinning a light down the ends - = but, that does not prove its not there. Just see no evidence of it. I even tried some 2000F rated ceramic material for packing - it = withstood the heat just fine, but the pulses blasted it into pieces = within 1 hour of flight time (perhaps even less). 13Bs without the = turbo block or the Renesis may be kinder {:>) My 0.02 Ed -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -------------------------------------------------------------------------= ----- Never miss a thing. Make Yahoo your homepage. ------=_NextPart_000_0008_01C853CC.9D4A1190 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hummm, disappointing to hear, Rich. I was = hoping it=20 would be a nice compromise compared to price and shape of the = spintech. =20 Mine is still quieter than previous (but that might not be saying much=20 {:>))

----- Original Message -----

From:=20 Richard = Nadig=20

To: Rotary motors in = aircraft

Sent: Thursday, January 10, = 2008 7:32=20 PM

Subject: [FlyRotary] Re: Fw: = [FlyRotary]=20 Re: Dennis' Muffler

Ed,

I installed a Hushpower II on my 13b and it was noticeably = quieter ....=20 for a while. It is now quite noisy and I intend to put the old = square=20 muffler back on. The Hushpower has turned powder gray on the out = side=20 like it has become hot

Rich

Ed Anderson <eanderson@carolina.rr.com&g= t;=20 wrote:

Well, you could be correct, = Mark.

However, even looking at the exploded = view of=20 the one you posted, it still looks to me that the only packing shown = is the=20 insulation packing (looks like approx 1/2" thick") around the=20 peripheral of the shell.

Now that is the resonator, while I = have the full=20 up muffler - and I carefully checked for packing because my = experience has=20 shown no sound absorbent packing will last more than a few hours = with my=20 engine. I could detect no packing material by shinning a light = down=20 the ends - but, that does not prove its not there. Just see no = evidence of it.

I even tried some 2000F rated = ceramic material=20 for packing - it withstood the heat just fine, but the pulses = blasted=20 it into pieces within 1 hour of flight time (perhaps even = less). 13Bs=20 without the turbo block or the Renesis may be kinder = {:>)

My 0.02

Ed
--
Homepage:=20 http://www.flyrotary.com/
Archive and UnSub:=20 = http://mail.lancaironline.net:81/lists/flyrotary/List.html

Never miss a thing. Ma= ke Yahoo=20 your homepage.

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