X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2132603 for flyrotary@lancaironline.net; Thu, 21 Jun 2007 20:15:38 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.65; envelope-from=bobperk@bellsouth.net Received: from ibm57aec.bellsouth.net ([74.249.212.131]) by imf17aec.mail.bellsouth.net with ESMTP id <20070622001501.EESB10856.imf17aec.mail.bellsouth.net@ibm57aec.bellsouth.net> for ; Thu, 21 Jun 2007 20:15:01 -0400 Received: from HpPavilion310n ([74.249.212.131]) by ibm57aec.bellsouth.net with ESMTP id <20070622001500.ECU28871.ibm57aec.bellsouth.net@HpPavilion310n> for ; Thu, 21 Jun 2007 20:15:00 -0400 From: "Bob Perkinson" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: PP construction methods Date: Thu, 21 Jun 2007 19:14:58 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004C_01C7B438.75835CE0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_004C_01C7B438.75835CE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit I have not read all the suggestion about sealing the tube for a P port engine, (just got back from Brasil) so this suggestion may have been tossed around and thrown out. If there is enough wall thickness on each side of the cooling chamber a couple of radial groves could be cut into the housing wall and the tube rolled into place. (Expanded internally) This would eliminate the need for any type of sealant in the between the coolant chamber and the inner and outer wall. If there is any doubt about the seal, then a small amount of an anaerobic gasket sealer could be used on the rolled faces. I am not sure if a rolling tool for that size tube would be readily available or not. Pro Seal keeps very nicely for a long time in the fridge Bob Perkinson Hendersonville, TN. RV9 N658RP Reserved If nothing changes Nothing changes -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Ed Anderson Sent: Thursday, June 21, 2007 8:53 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: PP construction methods Thanks for the info, Jerry. Who knows with all this interest in a PP - perhaps a running 2 rotor engine with PP will show up on the list - we all know Richard has a one rotor PP running. Ed ----- Original Message ----- From: Jerry Hey To: Rotary motors in aircraft Sent: Thursday, June 21, 2007 9:11 AM Subject: [FlyRotary] Re: PP construction methods Thanks, I made two of them about two years ago. Now that I am building a single rotor, I have the luxury of having a back up housing. A 1.5" i.d. port is not so small when you look at it in real life. Its size guarantees an easy life for the tip seals. Because of the thick wall I was able to put in several deep grooves before pouring in the epoxy. A word on epoxy. I totally disagree with using JB weld. There are epoxies designed for this type application. One is Duralco 4525. It is intended for high temp (500º), high performance bonding. Expensive but worth the piece of mind. In application, it is extremely thin and very slow curing and thus will flow completely to fill the cavity around the insert. Mine took an entire day to set up. Google Duralco 4525 if interested. Jerry On Jun 21, 2007, at 8:39 AM, Ed Anderson wrote: Nice looking P port, Jerry. Ed ----- Original Message ----- From: Jerry Hey To: Rotary motors in aircraft Sent: Thursday, June 21, 2007 8:09 AM Subject: [FlyRotary] Re: PP construction methods On Jun 21, 2007, at 7:28 AM, Lehanover@aol.com wrote: In a message dated 6/21/2007 3:12:48 A.M. Eastern Daylight Time, lendich@optusnet.com.au writes: George, ??? Let me get this straight.........Steel tube TIG welded to steel insert.......Then aluminum insert with O-ring (s) to seal to the steel tube.......? A sketch would be worth a thousand words for the engineering challenged........ -- Kelly Troyer I would advise against welding anything to the liner. The housings are actually very flexible, and will soon warp in favor of the weld beads. A thick walled aluminum tube in a very light press fit through the inner wall.?Same through the outer wall, but not tight through the outer wall is also fine. The inner wall needs good support to prevent chrome cracking when you torque up the stack. ? Lynn E. Hanover? Lynn,? similar to this?? My inserts(throttle bodies).? They are 2.25 o.d. and 1.5 i.d.? 6061 T6 ? ?Jerry <001c01c7b401$31f0a550$2402a8c0> ---------------------------------------------------------------------- See what's free at AOL.com. ------=_NextPart_000_004C_01C7B438.75835CE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I have not read all = the=20 suggestion about sealing the tube for a P port engine, (just got back from Brasil) so this = suggestion=20 may have been tossed around and thrown out.  If there is enough wall = thickness on=20 each side of the cooling chamber a couple of radial groves could be cut = into the=20 housing wall and the tube rolled into place. (Expanded internally)  This would eliminate the need = for any=20 type of sealant in the between the coolant chamber and the inner and = outer=20 wall.  If there is any = doubt about=20 the seal, then a small amount of an anaerobic gasket sealer could be = used on the rolled faces.  I am not sure if a rolling = tool for that=20 size tube would be readily available or not. 

Pro Seal keeps very = nicely for a=20 long time in the fridge

 

Bob Perkinson
Hendersonville, TN.
RV9 N658RP=20 Reserved
If nothing changes
Nothing = changes
 

-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Ed=20 Anderson
Sent: Thursday, June 21, 2007 8:53 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: PP construction=20 methods

Thanks for the info, Jerry.
 
Who knows with all this interest in a PP - = perhaps a=20 running 2 rotor engine with PP will show up on the list - we all know = Richard=20 has a one rotor PP running.
 
Ed
----- Original Message -----
From:=20 Jerry=20 Hey
To: Rotary motors in = aircraft=20
Sent: Thursday, June 21, 2007 = 9:11=20 AM
Subject: [FlyRotary] Re: PP=20 construction methods

Thanks,  I made two of them about two years = ago. =20 Now that I am building a single rotor, I have the luxury of having a = back up=20 housing.   A 1.5" i.d. port is not so small when you look = at it in=20 real life.  Its size guarantees an easy life for the tip = seals. =20 Because of the thick wall I was able to put in several deep grooves = before=20 pouring in the epoxy.   A word on epoxy.  I totally = disagree=20 with using JB weld.  There are epoxies designed for this type=20 application.  One is Duralco 4525.   It is intended = for high=20 temp (500=BA), high performance bonding.  Expensive but worth = the piece=20 of mind.  In application, it is extremely thin and very slow = curing and=20 thus will flow completely to fill the cavity around the = insert. =20  Mine took an entire day to set up.   Google Duralco = 4525 if=20 interested.      Jerry  =20




On Jun 21, 2007, at 8:39 AM, Ed Anderson wrote:
Nice looking P port, = Jerry.
 
Ed
----- Original = Message=20 -----
From:=20 Jerry=20 Hey
Sent:=20 Thursday, June 21, 2007 8:09 AM
Subject:=20 [FlyRotary] Re: PP construction methods


On Jun 21, 2007, at 7:28 AM, Lehanover@aol.com wrote:
In a message dated 6/21/2007 = 3:12:48 A.M.=20 Eastern Daylight Time, lendich@optusnet.com.au=20 writes:
George,
??? Let me get = this=20 straight.........Steel tube TIG welded to steel = insert.......Then=20 aluminum
insert with = O-ring (s)=20 to seal to the steel tube.......? A sketch would be worth a=20 thousand
words for the=20 engineering challenged........
--Kelly Troyer =
I would advise against welding = anything to=20 the liner. The housings are actually very = flexible,
and will soon warp in favor of = the weld=20 beads. A thick walled aluminum tube in a very light press fit = through=20 the inner wall.?Same through the outer wall, but not tight = through the=20 outer wall is also fine. The inner wall needs good support to = prevent=20 chrome cracking when you torque up the stack.
?
Lynn E.=20 Hanover?


Lynn,? similar to = this?? My=20 inserts(throttle bodies).? They are 2.25 o.d. and 1.5 i.d.? 6061 = T6 ?=20 ?Jerry

=
<001c01c7b401$31f0a550$2402a8c0>



See what's free = at=20 AOL.com.


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