X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from access.aic-fl.com ([207.30.253.2] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2120960 for flyrotary@lancaironline.net; Wed, 20 Jun 2007 09:54:47 -0400 Received-SPF: softfail receiver=logan.com; client-ip=207.30.253.2; envelope-from=unicorn@gdsys.net Received: from main (gdsi-38.gdsys.net [207.30.255.38]) by access.aic-fl.com (Rockliffe SMTPRA 4.5.6) with SMTP id for ; Wed, 20 Jun 2007 08:50:38 -0500 Message-ID: <004d01c7b342$7fbdd830$2dff1ecf@main> From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] PP construction methods Date: Wed, 20 Jun 2007 08:54:13 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004A_01C7B318.939019B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_004A_01C7B318.939019B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Wednesday, June 20, 2007 7:19 AM Subject: [FlyRotary] PP construction methods Greetings, One of the things that's always bothered me about making a PP housing = is leakage. I've heard very experienced folks say that eventually, any = PP housing you make will leak, and it's easy for me to imagine that = happening. I don't think I've heard the same thing about factory = housings though. How are the ports installed in the factory PP housing? = =20 The other problem with a conversion is the side ports. I know people = fill these with their favorite epoxy, but I'd worry about that coming = loose, and getting into the rotor. How much would it hurt the PP = operation if you just sealed the ports on the outside of the side = housings with a plate where the intake would have been? =20 Cheers, Rusty Rusty, I have run my PP on the single rotor for about 25hrs throug all sorts = of heat cycles and never had a problem with leaking. Keep in mind that = my insert is held in place by a flange with two bolts, so the JB only = seals, it does not do the holding.=20 I certainly would never want to depend on JB for holding the insert in = place. On your question with the open side port, one of the side ports was = open during the same test period, closed on the outside. Never observed = any negative effect, however, it never ran max RPM. The highest was = 5000RPM. I have closed that port now for the next test runs. FWIW. -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Free Edition.=20 Version: 7.5.472 / Virus Database: 269.9.1/854 - Release Date: = 6/19/2007 1:12 PM ------=_NextPart_000_004A_01C7B318.939019B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Wednesday, June 20, 2007 = 7:19=20 AM
Subject: [FlyRotary] PP = construction=20 methods

Greetings,
 
One of the = things that's=20 always bothered me about making a PP housing is leakage.  I've = heard very=20 experienced folks say that eventually, any PP housing you make will = leak, and=20 it's easy for me to imagine that happening.  I don't think = I've=20 heard the same thing about factory housings though.  = How are the ports = installed in the=20 factory PP housing? 
 
The other = problem with a=20 conversion is the side ports.  I know people fill these with = their=20 favorite epoxy, but I'd worry about that coming loose, and getting = into the=20 rotor.  How much would it hurt the PP operation if you just = sealed=20 the ports on the outside of the side housings with a plate where the = intake=20 would have been?  
 
Cheers,
Rusty
 

Rusty,
 
I have run my PP on the single rotor for about = 25hrs=20 throug all sorts of heat cycles and never had a problem with leaking. = Keep in=20 mind that my insert is held in place by a flange with two bolts, so = the JB=20 only seals, it does not do the holding.
I certainly would never want to depend on JB = for holding=20 the insert in place.
 
On your question with the open side port, one = of the=20 side ports was open during the same test period, closed on the = outside. Never=20 observed any negative effect, however, it never ran max RPM. The = highest was=20 5000RPM. I have closed that port now for the next test = runs.
 
FWIW.
 
 
 
 
 

No virus found in this incoming message.
Checked by AVG Free = Edition.
Version: 7.5.472 / Virus Database: 269.9.1/854 - Release = Date:=20 6/19/2007 1:12 PM
------=_NextPart_000_004A_01C7B318.939019B0--