X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from m15.nyc.untd.com ([64.136.22.78] verified) by logan.com (CommuniGate Pro SMTP 4.3.6) with SMTP id 612749 for flyrotary@lancaironline.net; Sat, 23 Jul 2005 16:15:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.22.78; envelope-from=jbker@juno.com Received: from m15.nyc.untd.com (localhost [127.0.0.1]) by m15.nyc.untd.com with SMTP id AABBQFKKWAFAN3A2 for (sender ); Sat, 23 Jul 2005 13:14:44 -0700 (PDT) X-UNTD-OriginStamp: Y+Mfppm2QyGfnY/dq+iW1R7OXScrkpqZURbv9K5zNFdHiFRTbQt5uQ== Received: (from jbker@juno.com) by m15.nyc.untd.com (jqueuemail) id KYMCCRSB; Sat, 23 Jul 2005 13:14:02 PDT To: flyrotary@lancaironline.net Date: Sat, 23 Jul 2005 16:12:26 -0400 Subject: Re: [FlyRotary] Re: fiberglass runners Message-ID: <20050723.161227.2276.7.JBKER@juno.com> X-Mailer: Juno 5.0.33 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=--__JNP_000_48f9.717c.2e44 X-Juno-Line-Breaks: 8-6,7-8,10-11,16-26,41-42,47-55,66-67,68-32767 From: WALTER B KERR X-ContentStamp: 25:12:3687524110 X-MAIL-INFO:453f83ab8a6b7393fa8ac7f36a5acb17c7274f0b43ae177a47de1a8b0b0b0b7f8e6e471a2feb0e572beb0e4e2b4ebf47baaa1f2f3bef0f9e6f4e2ebb3f5a331f332a8ecffb77ba3befaf1313be7ef7bb5fd39f3a X-UNTD-Peer-Info: 127.0.0.1|localhost|m15.nyc.untd.com|jbker@juno.com This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_48f9.717c.2e44 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit On Sat, 23 Jul 2005 15:25:09 -0400 "Joe Berki" writes: Chris, You could use sections of blue foam used in the cannard cut in a long pipe or cynider shape. Cut them up to make any type of pipe you want. Coat the thing with RTV, glass over it. Disolve the foam with solvent and pul the RTV out with pliers. It leaves a smooth surface inside the tubes. Joe Berki Limo EZ ----- Original Message ----- From: Christopher Barber To: Rotary motors in aircraft Sent: Saturday, July 23, 2005 2:12 AM Subject: [FlyRotary] Re: fiberglass runners I have seen some postings over the few years I have been on this list regarding making fiberglass runners for an intake manifold, however, I am unsure if anyone has actually made any and if not why not. If I understand it correctly they are paths for air and would not require any "structural strength, just need to be resistant to the heat in the area they are placed and direct the air properly. If this is true, and please correct me where I am wrong, why would fiberglass runners not work. Is it that there are not that many composite guys on the list (just Mr. Slade and myself?) and as a result are resistant or not skilled in working with fiberglass. Seems they would be light, easy to form and get into tighter places and do the job well. However, I am not an engineer and am concerned about obvious stuff I could easily miss. I am not skilled with any welding (even though my build partner, David Staten, just bought a welder for us to learn with) so like the idea of having alternatives. I am in the final stages of my Velocity airframe construction (now in the micro, sand repeat stage) and feel VERY confident in my abilities with fiberglass. What obvious stuff am I missing regarding using high temp epoxy to make well formed runners out of fiberglass. Y'alls input/insight is greatly appreciated. TIA. All the best, Chris Barber Houston, GSOT LoneStarVelocity.com ++++++++++++++++++++++++++++++++++++++ Joe, too hard! Do it the easy lazy man's way. Get bicyle tube slightly smaller diameter than the finished tube, cut it apart . Get PVC pipe with ID of your finished runner's ID. Cut to disired length of runner and split in half. Duct tape pipe back together. Tie wrap one end of tube shut and insert into pipe. Fill with blasting sand though open end. Shoot a shot of shop air into it while holding vertical. Sand will fill tube out to PVC. When filled with sand to top of PVC, tie wrap off. Remove PVC and you have a saugage bag that you can shape to any desired curve. Apply a separating agent ( I used PAM) , then wrap with FG tape. When cured , undo tie wrap, dump sand, pull tube out and presto you have a runner with very smooth interior. Bernie ----__JNP_000_48f9.717c.2e44 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable
 
 
On Sat, 23 Jul 2005 15:25:09 -0400 "Joe Berki" <jskmberki@alltel.net> writes:
Chris,
    You could use = sections of blue=20 foam used in the cannard cut in a long pipe or cynider shape.  = Cut=20 them up to make any type of pipe you want.  Coat the thing with RTV,= =20 glass over it.  Disolve the foam with solvent and pul the RTV out = with=20 pliers. It leaves a smooth surface inside the tubes.
 
Joe Berki
Limo EZ 
----- Original Message -----
= From:=20 Christopher Barber
To: Rotary motors in aircraft=20
Sent: Saturday, July 23, 2005 2:= 12=20 AM
Subject: [FlyRotary] Re: = fiberglass=20 runners

I=20 have seen some postings over the few years I have been on this list=20 regarding making fiberglass runners for an intake manifold, however, I = am=20 unsure if anyone has actually made any and if not why not.  If I=20 understand it correctly they are paths for air and would not require = any=20 "structural strength, just need to be resistant to the heat in the area= they=20 are placed and direct the air properly.  If this is true, and = please=20 correct me where I am wrong, why would fiberglass runners not work.&= nbsp; Is=20 it that there are not that many composite guys on the list (just Mr. = Slade=20 and myself?) and as a result are resistant or not skilled in working = with=20 fiberglass.  Seems they would be light, easy to form and get into= =20 tighter places and do the job well.  However, I am not an engineer= and=20 am concerned about obvious stuff I could easily miss.  I am not = skilled=20 with any welding (even though my build partner, David Staten,  = just=20 bought a welder for us to learn with) so like the idea of having=20 alternatives.
 
I=20 am in the final stages of my Velocity airframe=20 construction (now in the micro, sand repeat stage) and feel = VERY=20 confident in my abilities with fiberglass.  What obvious stuff am = I=20 missing regarding using high temp epoxy to make well formed = runners out=20 of fiberglass.  Y'alls input/insight is greatly appreciated. = =20 TIA.
 
All the best,
 
Chris Barber
Houston, GSOT
LoneStarVelocity.com
++++++++++++++++++++++++++++++++++++++
 
Joe, too hard!  Do it the easy lazy man's way. Get bicyle tube= =20 slightly smaller diameter than the finished tube, cut it apart . Get PVC = pipe=20 with ID of your finished runner's ID. Cut to disired length of runner and= =20 split in half. Duct tape pipe back together. Tie wrap one end = of=20 tube shut and insert into pipe. Fill with blasting sand though open end. = Shoot=20 a shot of shop air into it while holding vertical. Sand will fill tube = out to=20 PVC. When filled with sand to top of PVC, tie wrap off. Remove PVC and = you=20 have a saugage bag that you can shape to any desired curve. Apply a = separating=20 agent ( I used PAM) , then wrap with FG tape. When cured , undo tie wrap,= dump=20 sand, pull tube out and presto you have a runner with very smooth=20 interior.
 
Bernie
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