Return-Path: Received: from fed1rmmtao01.cox.net ([68.230.241.38] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 87063 for flyrotary@lancaironline.net; Mon, 24 May 2004 10:00:36 -0400 Received: from davidandanne ([68.111.224.107]) by fed1rmmtao01.cox.net (InterMail vM.6.01.03.02 201-2131-111-104-20040324) with SMTP id <20040524020706.BUQH8495.fed1rmmtao01.cox.net@davidandanne> for ; Sun, 23 May 2004 22:07:06 -0400 From: "DaveLeonard" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Two problems solved, 2 more pop up... Date: Sun, 23 May 2004 19:07:14 -0700 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0069_01C440F9.286AD1A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_0069_01C440F9.286AD1A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit MessageThanks Todd. Maybe I'll just hang in there until I show up one day to find the cowl melted.... but I guess the aluminum can never hurt and is very easy to do. Though I see that as a good solution for radiated heat while running but not convective heat after shut down. Dave Leonard -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Haywire Sent: Sunday, May 23, 2004 12:48 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Two problems solved, 2 more pop up... New problem: melt down after shut down. That turbo has a lot of very hot mass. I flow enough air through the cowl when running to keep things cool. Right after shut down the cowl is just luke warm to the touch. But 5 min after shutting down the turbo side of the cowl is too hot to touch on the top and I can smell resin. It gets a little soft to tap on it and it is starting to look a little mottled and maybe yellow (if I let my immagineation run away). I have seen a couple of RVs with drop down hatches in the top cowl to let heat out after shut down. Does anyone have an idea about how hot I can let the fiberglass get? Bright Ideas? Hi Dave; When I first began to run with the cowl on, I experienced the same issue after shutdown, however it created an issue with my creative air intake, which is located directly above the turbo (pic attached). The after-shutdown heat soak caused the trapped air inside the foam to expand, severely blistering the intake (It looked awful). I drilled a few small holes through the inside of the cowl into the inside of the inlet duct foam to release the air pressure and it went back to close to original size/shape. After a few cold nights it had completely gone back to shape and I've not seen it expand again after shutdown. Hopefully that will be the end of it as I don't feel like redoing it. The inside of the cowl does have a very slight brown tint to it as well. I may follow Ed's lead and put a little heavy aluminium foil on it. So I wouldn't get overly concerned about it. Of coarse your California OAT may be enough to make a difference. A hot day in Canada would be a cold day for you :-) S. Todd Bartrim (going purple) Turbo 13B RV-9Endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Whatever you vividly imagine, Ardently desire, Sincerely believe in, Enthusiastically act upon, Must inevitably come to pass". ------=_NextPart_000_0069_01C440F9.286AD1A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Thanks=20 Todd.  Maybe I'll just hang in there until I show up one day to = find the=20 cowl melted....  but I guess the aluminum can never hurt and is = very easy=20 to do.  Though I see that as a good solution for radiated heat = while=20 running but not convective heat after shut down.
 
Dave=20 Leonard
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of=20 Haywire
Sent: Sunday, May 23, 2004 12:48 = PM
To: Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Two problems = solved, 2=20 more pop up...

New problem:  melt down after shut down.  = That turbo=20 has a lot of very hot mass.  I flow enough air through the cowl = when=20 running to keep things cool.  Right after shut down the cowl is = just luke=20 warm to the touch.  But 5 min after shutting down the turbo side = of the=20 cowl is too hot to touch on the top and I can smell resin.  = It gets=20 a little soft to tap on it and it is starting to look a little = mottled=20 and maybe yellow (if I let my immagineation run away).  I have = seen a=20 couple of RVs with drop down hatches in the top cowl to let heat out = after=20 shut down.  Does anyone have an idea about how hot I can let the=20 fiberglass get?  Bright Ideas?
 
Hi=20 Dave;
   =20 When I first began to run with the cowl = on, I=20 experienced the same issue after shutdown, however it created an issue = with my=20 creative air intake, which is located directly above the = turbo (pic=20 attached). The after-shutdown heat soak caused the trapped air inside = the foam=20 to expand, severely blistering the intake (It looked awful). I drilled = a few=20 small holes through the inside of the cowl into the inside of the = inlet duct=20 foam to release the air pressure and it went back to close to original = size/shape. After a few cold nights it had completely gone back to = shape and=20 I've not seen it expand again after = shutdown.
    Hopefully that will be the end of it as I = don't feel like=20 redoing it. The inside of the cowl does have a very slight brown tint = to it as=20 well. I may follow Ed's lead and put a little heavy aluminium = foil on it.=20 So I wouldn't get overly concerned about it. Of coarse your California = OAT may=20 be enough to make a difference. A hot day in Canada would be a cold = day for=20 you :-)

S. Todd Bartrim    = (going=20 purple)
Turbo 13B = RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

=    "Whatever you vividly imagine, Ardently desire, = Sincerely=20 believe in, Enthusiastically act upon, Must inevitably come to pass".=20

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