Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 84937 for flyrotary@lancaironline.net; Sat, 22 May 2004 19:54:46 -0400 Received: from EDWARD (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i4MNKifP026442 for ; Sat, 22 May 2004 19:20:46 -0400 (EDT) Message-ID: <000801c44053$6b6c2810$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fiberglass Help! Date: Sat, 22 May 2004 19:20:49 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01C44031.E40E3CD0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C44031.E40E3CD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Richard, Thanks for the suggestions. Sounds like the heat lamp is a much = better way than using gasoline to dissolve the foam. =20 Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: Richard=20 To: Rotary motors in aircraft=20 Sent: Saturday, May 22, 2004 6:47 PM Subject: [FlyRotary] Re: Fiberglass Help! Hi Ed, I made the ducts for my SOOB four times and found the easiest way with = compound curves is BID cloth. BID cloth allows you to wrap around = anything like rubber. I also made intake elbows for the carburetors the = same way. All you need is 3 layers at most.=20 The other day I needed two 1 1/2" elbows on the one rotor. using = Styrofoam for the core painted with water based out door Latex. When the = Latex was dry I covert it with PVA mold release and made the lay-up with = bid cloth and VE resin. After initial cure I put the heat lamp on it, = and after it got nice hot the styrofoam started to shrink and the whole = core fell out of the elbow. Much cleaner then using gasoline. I hope this helps a little. Richard Sohn N-2071U unicorn@gdsys.net www.gdsys.net/WWWmembers/unicorn/ ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Saturday, May 22, 2004 8:51 AM Subject: [FlyRotary] Fiberglass Help! Ok, you fiberglass types. I need some guidance. I can (and have) = slapped resin on glass cloth and obtained a functional (if heavy) item. = However, I am about to start work on my new radiator ducts and I would = like to do better. My ducts will be approx. 4"x4" at the inlet and = approx. 9"x10" at the core. There might be as much as 1 psi pressure on = the walls (if I should ever be so lucky to go that fast).=20 There a some semi compound curves at the corners of the duct as it = slopes inward from the top and bottom from the core to the inlet. =20 I need your recommendation about the weight and weave of the cloth. = I have previously used the cloth tape as it was easy to manage, but it = required several layers and it is a bit heavy. Like I said functional = but not pretty nor light. I would like your guidance on how best to apply the sheet to the = mold. In the past, I basically wrap the foam mold in duct tape and the = lay resin on it followed by raps of the cloth tape and more resine. I = am told that using sheet rather than the tape and first laying it out on = aluminum foil to wet it and then cut it in sizes say to fit a side of = the 4 side foam mold with a bit for overlap with the adjacent sides was = one way to go. Any suggestions would be appreciated. Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ------=_NextPart_000_0005_01C44031.E40E3CD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Richard,
 
    Thanks for the=20 suggestions.  Sounds like the heat lamp is a much better way than = using=20 gasoline to dissolve the foam.  
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 Richard
Sent: Saturday, May 22, 2004 = 6:47=20 PM
Subject: [FlyRotary] Re: = Fiberglass=20 Help!

Hi Ed,
 
I made the ducts for my SOOB four = times and found=20 the easiest way with compound curves is BID cloth. BID cloth allows = you to=20 wrap around anything like rubber. I also made intake elbows for the=20 carburetors the same way. All you need is 3 layers at most. =
The other day I needed two 1 1/2" = elbows on the=20 one rotor. using Styrofoam for the core painted with water based out = door=20 Latex. When the Latex was dry I covert it with PVA mold release and = made the=20 lay-up with bid cloth and VE resin. After initial cure I put the heat = lamp on=20 it, and after it got nice hot the styrofoam started to shrink and the = whole=20 core fell out of the elbow. Much cleaner then using = gasoline.
I hope this helps a = little.
 
 
Richard Sohn
N-2071U
unicorn@gdsys.net
www.gdsys.net/WWWmember= s/unicorn/
 
 
----- Original Message -----
From:=20 Ed Anderson
To: Rotary motors in = aircraft=20
Sent: Saturday, May 22, 2004 = 8:51=20 AM
Subject: [FlyRotary] = Fiberglass=20 Help!

Ok, you fiberglass types.  I = need some=20 guidance. I can (and have) slapped resin on glass cloth=20 and obtained a functional (if heavy) item.  However, I am = about to=20 start work on my new radiator ducts and I would like to=20 do better.  My ducts will be approx. 4"x4" at the inlet = and=20 approx. 9"x10" at the core.  There might be as much as 1 psi = pressure=20 on the walls (if I should ever be so lucky to go that fast). =
 
There a some semi compound curves = at the=20 corners of the duct as it slopes inward from the top and bottom from = the=20 core to the inlet. 
 
I need your recommendation about = the weight and=20 weave of the cloth.  I have previously used the cloth tape as = it was=20 easy to manage, but it required several layers and it is a bit = heavy. =20 Like I said functional but not pretty nor light.
 
I would like your guidance on how = best to apply=20 the sheet to the mold. In the past, I basically wrap the foam = mold in=20 duct tape and the lay resin on it followed by raps of the cloth tape = and=20 more resine.  I am told that using sheet rather than the tape = and first=20 laying it out on aluminum foil to wet it and then cut it in sizes = say to fit=20 a side of the 4 side foam mold with a bit for overlap with the = adjacent=20 sides was one way to go.
 
Any suggestions would be=20 appreciated.
 
Ed
 
 
Ed Anderson
RV-6A N494BW Rotary=20 Powered
Matthews, = NC
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