X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m23.mx.aol.com ([64.12.137.4] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2778299 for flyrotary@lancaironline.net; Wed, 05 Mar 2008 10:46:25 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.4; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m23.mx.aol.com (mail_out_v38_r9.3.) id q.bd3.1aa992eb (34935) for ; Wed, 5 Mar 2008 10:45:41 -0500 (EST) Received: from webmail-ne18 (webmail-ne18.sim.aol.com [207.200.67.18]) by cia-da04.mx.aol.com (v121.4) with ESMTP id MAILCIADA048-887747cec02430f; Wed, 05 Mar 2008 10:45:41 -0500 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: Exhaust? was [FlyRotary] engine installation pictures Date: Wed, 05 Mar 2008 10:45:41 -0500 X-AOL-IP: 65.161.241.3 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CA4CEF1A0557E0_FCC_6FF8_webmail-ne18.sysops.aol.com" X-Mailer: AOL Webmail 34865-STANDARD Received: from 65.161.241.3 by webmail-ne18.sysops.aol.com (207.200.67.18) with HTTP (WebMailUI); Wed, 05 Mar 2008 10:45:41 -0500 Message-Id: <8CA4CEF19A85B67-FCC-385C@webmail-ne18.sysops.aol.com> X-Spam-Flag: NO ----------MB_8CA4CEF1A0557E0_FCC_6FF8_webmail-ne18.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Greg,=20 Please let me say I'm not a naysayer and re-reading my last post it might ha= ve sounded rather aggressive. Please understand that isn't what was intended= . My intent was to mention that I have never seen really MEASUREABLE results= with any kind of wrap. In an aircraft application my worry would be exactly= as stated before, you couldn't see a minor crack until it was already dange= rous. Since a turbo application uses the exhaust manifold as a minor structu= ral member I'd suggest coating rather than wrap. It looks a great deal bette= r too. Bill Jepson -----Original Message----- From: Greg Ward To: Rotary motors in aircraft Sent: Tue, 4 Mar 2008 11:21 pm Subject: [FlyRotary] Re: Exhaust? was [FlyRotary] engine installation pictur= es No answers to any of these questions Bill.=C2=A0 I will call Brian tomorrow=20= and see what's up, and get some specifics.=C2=A0 He brought it up because we= have been talking about the turbocharging issue, and how/where to locate al= l of the parts, including shielding. Greg ----- Original Message -----=20 From: WRJJRS@aol.com=20 To: Rotary motors in aircraft=20 Sent: Tuesday, March 04, 2008 10:57 PM Subject: [FlyRotary] Re: Exhaust? was [FlyRotary] engine installation pictur= es In a message dated 3/4/2008 8:32:11 PM Pacific Standard Time, gregw@onestopd= esign.biz writes: Yeah, and my friend in SoCal, the Racer again, says that the 20B racers down= there wrap, and it really helps.=C2=A0 But then again, racers...... Greg Greg, And they tested this how? With what instrumentation? So you know I have buil= t racing cars and bikes for others and I have road raced motorcycles myself.= The only coating or wrap I could find that worked was the Jet-Hot coating.=20= That was on a motorcycle. The in cowl temps were reduced by 15=C2=B0F. There= wasn't any HP increase that I could determine reliably. I did record an inc= rease on the wheel dyno but not enough to be certain it wasn't just differen= t temp and baro pressure conditions. The rotary exhaust temperature is so mu= ch hotter that Jet-Hot has only had a suitable coating for about a year and=20= a half. I'd try that if you must. Shielding, even thin and close has proven=20= to be effective, as has zirconia ceramic blanket. The wrap may not have actu= ally caused the cracking on the exhaust system mentioned previously but it c= ertainly makes it impossible to detect cracks before they get dangerous. I'd= stay away from wraps for just that reason. Bill Jepson It's Tax Time! Get tips, forms and advice on AOL Money & Finance. ----------MB_8CA4CEF1A0557E0_FCC_6FF8_webmail-ne18.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"
Greg,
Please let me say I'm not a naysayer and re-reading my last post it mig= ht have sounded rather aggressive. Please understand that isn't what was int= ended. My intent was to mention that I have never seen really MEASUREABLE re= sults with any kind of wrap. In an aircraft application my worry would be ex= actly as stated before, you couldn't see a minor crack until it was already=20= dangerous. Since a turbo application uses the exhaust manifold as a minor st= ructural member I'd suggest coating rather than wrap. It looks a great deal=20= better too.
Bill Jepson


-----Original Message-----
From: Greg Ward <gregw@onestopdesign.biz>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 4 Mar 2008 11:21 pm
Subject: [FlyRotary] Re: Exhaust? was [FlyRotary] engine installation pictur= es

No answers to any of these questions Bill.  I will=20= call Brian tomorrow and see what's up, and get some specifics.  He brou= ght it up because we have been talking about the turbocharging issue, and ho= w/where to locate all of the parts, including shielding.
Greg
----- Original Message -----
Sent: Tuesday, March 04, 2008 10:57 P= M
Subject: [FlyRotary] Re: Exhaust? was= [FlyRotary] engine installation pictures

In a message dated 3/4/2008 8:32:11 PM Pacific Standard Time, gregw@onestopdesign.biz writes:
Yeah, and my friend in SoCal, the Racer again, says=20= that the 20B racers down there wrap, and it really helps.  But then aga= in, racers......
Greg
Greg,
And they tested this how? With what instrumentation? So you know I have= built racing cars and bikes for others and I have road raced motorcycles my= self. The only coating or wrap I could find that worked was the Jet-Hot coat= ing. That was on a motorcycle. The in cowl temps were reduced by 15=C2=B0F.=20= There wasn't any HP increase that I could determine reliably. I did record a= n increase on the wheel dyno but not enough to be certain it wasn't just dif= ferent temp and baro pressure conditions. The rotary exhaust temperature is=20= so much hotter that Jet-Hot has only had a suitable coating for about a year= and a half. I'd try that if you must. Shielding, even thin and close has pr= oven to be effective, as has zirconia ceramic blanket. The wrap may not have= actually caused the cracking on the exhaust system mentioned previously but= it certainly makes it impossible to detect cracks before they get dangerous= . I'd stay away from wraps for just that reason.
Bill Jepson



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