Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Sun, 21 Dec 2003 13:55:43 -0500 Message-ID: X-Original-Return-Path: Received: from harrier.mail.pas.earthlink.net ([207.217.120.12] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2899594 for flyrotary@lancaironline.net; Sun, 21 Dec 2003 10:53:01 -0500 Received: from user-2injrsd.dialup.mindspring.com ([165.121.239.141] helo=Carol) by harrier.mail.pas.earthlink.net with smtp (Exim 3.33 #1) id 1AY5t5-0004pU-00 for flyrotary@lancaironline.net; Sun, 21 Dec 2003 07:53:00 -0800 X-Original-Message-ID: <009e01c3c7da$7c5d67c0$0000a398@Carol> From: "sqpilot@earthlink" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Emailing: Ed-Klepeis X-Original-Date: Sun, 21 Dec 2003 09:52:48 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_009B_01C3C7A8.30F128D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2727.1300 This is a multi-part message in MIME format. ------=_NextPart_000_009B_01C3C7A8.30F128D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: Jim Sower=20 To: Rotary motors in aircraft=20 Sent: Saturday, December 20, 2003 11:48 PM Subject: [FlyRotary] Re: Emailing: Ed-Klepeis I was there too, but I thought it wasn't a valid test since there was = a metal "wall" just aft of the outlet, and all sound drummed and echoed = off that wall. I have no way of quantifying the effect of that barrier = but I intuit that it was substantial, so I have to pretty much ignore = that test as far as sound suppression goes. I do like the compact size = and shape and hope it works out really well.=20 Waiting for another shoe to drop .... Jim S.=20 kevin lane wrote:=20 I was there when this prototype was first run at Tracy's. I didn't = have a decibel meter like Paul, but then I didn't need one, it was very = loud and seemed to have no muffling effect. based on its small size and = no innards, it would have been remarkable if it did have any effect, = actually.Kevin Lane Portland, OR=20 e-mail-> n3773@comcast.net=20 web-> http://home.comcast.net/~n3773=20 (browse w/ internet explorer)=20 ...also this principle is used to reduce sound effects in the = exhaust outlet nozzle by routing cool air around the hot center (reduces = the ripping noise quite a bit)....fwiw. So maybe it will work on the = rotary... I talked to Ed Klepeis about it on the phone this week. He said = that he is awiting testing from Mr. Bass, and that the noise level would = be addressed. I mentioned to him that in the 60's on motorcycles, we = installed the "salt and pepper" exhaust silencers on our bikes, and they = worked well. Very simple. Mounts to the end of the exhaust, and just has = several holes like a salt shaker cover. They also had inserts that slid = into the end of the exhaust pipe, with swirls that did an effective job. = Of course the inserts would probably have to be inconel or ? The = compact size of this thing is appealing to me. Paul Conner --=20 Jim Sower=20 Crossville, TN; Chapter 5=20 Long-EZ N83RT, Velocity N4095T=20 =20 ------=_NextPart_000_009B_01C3C7A8.30F128D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

----- Original Message -----
From:=20 Jim=20 Sower
To: Rotary motors in = aircraft

Sent: Saturday, December 20, = 2003 11:48=20 PM

Subject: [FlyRotary] Re: = Emailing:=20 Ed-Klepeis

I was there too, but I thought it wasn't a valid test = since=20 there was a metal "wall" just aft of the outlet, and all sound drummed = and=20 echoed off that wall. I have no way of quantifying the effect of = that=20 barrier but I intuit that it was substantial, so I have to pretty much = ignore=20 that test as far as sound suppression goes. I do like the = compact size=20 and shape and hope it works out really well.
Waiting for another = shoe to=20 drop .... Jim S.=20
kevin lane wrote:=20
I was there when this = prototype was=20 first run at Tracy's. I didn't have a decibel meter like Paul, = but=20 then I didn't need one, it was very loud and seemed to have no = muffling effect. based on its small size and no innards, it = would have=20 been remarkable if it did have any effect, = actually.Kevin=20 Lane Portland, OR
e-mail-> n3773@comcast.net
web-> = http://home.comcast.net/~n3773=20
(browse w/ internet explorer)=20

=85..also this = principle is=20 used to reduce = sound = effects in=20 the exhaust outlet nozzle by routing cool air around the hot = center=20 (reduces the ripping noise quite a bit)=85=85..fwiw. So maybe it = will work on=20 the rotary=85=85.

I talked to Ed = Klepeis about=20 it on the phone this week. He said that he is awiting testing from = Mr.=20 Bass, and that the noise level would be addressed. I mentioned to = him that=20 in the 60's on motorcycles, we installed the "salt and pepper" = exhaust=20 silencers on our bikes, and they worked well. Very simple. Mounts = to the=20 end of the exhaust, and just has several holes like a salt shaker=20 cover. They also had inserts that slid into the end of the = exhaust=20 pipe, with swirls that did an effective job. Of course the inserts = would=20 probably have to be inconel or ? The compact size of = this=20 thing is appealing to me. Paul=20 Conner

--
Jim Sower
Crossville, TN; Chapter 5
Long-EZ N83RT, = Velocity=20 N4095T

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