Return-Path: Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 84095 for flyrotary@lancaironline.net; Sat, 22 May 2004 10:15:32 -0400 Received: from 1dd8d01.bellsouth.net ([68.18.116.3]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040522141530.GBQF15189.imf25aec.mail.bellsouth.net@1dd8d01.bellsouth.net> for ; Sat, 22 May 2004 10:15:30 -0400 Message-Id: <6.0.1.1.1.20040522100358.02be93a0@mail.bellsouth.net> X-Sender: brecab@mail.bellsouth.net X-Mailer: QUALCOMM Windows Eudora Version 6.0.1.1 Date: Sat, 22 May 2004 10:14:35 -0400 To: "Rotary motors in aircraft" From: CCI Subject: Re: [FlyRotary] Fiberglass Help! In-Reply-To: References: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_6915243==.ALT" --=====================_6915243==.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed Hi Ed, One easy way that I use is to place the cloth between two pcs. of plastic sheeting (drop cloths from Home Depot) add the resin to the cloth, then squegee using a pc. of plastic or body filler squeegees work good. This way you can see when the glass wets out and you can squeegee the excess resin off to the side if the sheet to save weight. Remove one side of the plastic to apply so you don't get it all over you. It is also easy to cut to size using a Fiskars rotary cutter, just take a marker and lay out the shape you want, cut it and there it is with little mess. For ducts, 8 oz. unidirectional cloth should be about right. Fred At 09:51 AM 5/22/2004, you wrote: >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). > >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. > >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 --=====================_6915243==.ALT Content-Type: text/html; charset="us-ascii" Hi Ed, One easy way that I use is to place the cloth between two pcs. of plastic sheeting (drop cloths from Home Depot) add the resin to the cloth, then squegee using a pc. of plastic or body filler squeegees work good. This way you can see when the glass wets out and you can squeegee the excess resin off to the side if the sheet to save weight. Remove one side of the plastic to apply so you don't get it all over you. It is also easy to cut to size using a Fiskars rotary cutter, just take a marker and lay out the shape you want, cut it and there it is with little mess. For ducts, 8 oz. unidirectional cloth should be about right. Fred

At 09:51 AM 5/22/2004, you wrote:

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).

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.

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

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