Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2782222 for flyrotary@lancaironline.net; Wed, 03 Dec 2003 15:07:50 -0500 Received: from ms-mss-03-ce0-1 ([10.10.1.41]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with ESMTP id hB3K7hPf006293 for ; Wed, 3 Dec 2003 15:07:47 -0500 (EST) Received: from southeast.rr.com (localhost [127.0.0.1]) by ms-mss-03.southeast.rr.com (iPlanet Messaging Server 5.2 HotFix 1.12 (built Feb 13 2003)) with ESMTP id <0HPC00MX558TKV@ms-mss-03.southeast.rr.com> for flyrotary@lancaironline.net; Wed, 03 Dec 2003 15:07:41 -0500 (EST) Received: from [10.10.1.21] by ms-mss-03.southeast.rr.com (mshttpd); Wed, 03 Dec 2003 15:07:41 -0500 Date: Wed, 03 Dec 2003 15:07:41 -0500 From: echristley@nc.rr.com Subject: Re: [FlyRotary] EWP pressure or flow To: Rotary motors in aircraft Reply-to: echristley@nc.rr.com Message-id: <6ce1f69aaf.69aaf6ce1f@southeast.rr.com> MIME-version: 1.0 X-Mailer: iPlanet Messenger Express 5.2 HotFix 1.12 (built Feb 13 2003) Content-type: multipart/mixed; boundary="Boundary_(ID_8Sg43FczVnTWmLHnjIvytw)" Content-language: en X-Accept-Language: en Priority: normal X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. --Boundary_(ID_8Sg43FczVnTWmLHnjIvytw) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT Content-disposition: inline I finally got through to the archives, and found the numbers stated as one EWP producing 45 liters/min and two in series producing ~56 liters/min. But against what head pressure? I searched all over Davie-Craig's website. While they quote flowrate all over the place, they never state how much head pressure these pumps will create. I'm still trying to work up feasibility numbers for relocating the rads to the back of the plane, and expect much higher than normal back pressure. Is there a way to calculate out these sort of numbers? Content-Type: multipart/alternative; boundary="----=_NextPart_001_0007_01C3B987.EE4CF410" ------=_NextPart_001_0007_01C3B987.EE4CF410 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Mark; Everyone has their own idea about what's safe and what isn't; but to me a small, quality, silicone based heater hose through the firewall is preferable to a large air duct. Even standard small diameter hoses (1/2 or 5/8) work in cars for 20 years. (My '83 van with 255K miles still has all the original heater hoses). I went to NAPA and paged through their catalog of heater cores until I found what I wanted; 6" x 6" x 2" (I think goes to an old Ford van). I built a housing for it, added a centrifugal fan from Lincoln Surplus. It mounts in the back of the cabin on my Velocity, ducts going forward, and has a standard automotive cable control valve in the water circuit that I can adjust from up front. Also has 2-speed blower. Hasn't flown yet, but in tests it makes a LOT of heat. (It helps in making a housing if you are not fiberglass challenged). Al -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Tuesday, December 02, 2003 4:02 PM To: Rotary motors in aircraft Subject: [FlyRotary] Heaters/defrosters Is there a "best practice" for cabin heat/defrost systems for rotary a/c. Those of you that are flying, how did you approach this item. It seems to me that with all that heat going out the tailpipe, it is a no-brainer... except for the carbon-monoxide thing. Then again, I don't want to be scalded with hot ethylene-glycol either. The exhaust muff seems like the lighter and simpler solution. On the other hand, with proper ducting, the heater core could add extra cooling during climb-out. Comments welcome, Mark S. (hot oil exchanger is out of the question) >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_001_0007_01C3B987.EE4CF410 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Mark;

 

Everyone has their own idea about what’s safe = and what isn’t; but to me a small, quality, silicone based heater hose through the firewall is preferable to a large air duct.  Even = standard small diameter hoses (1/2 or 5/8) work in cars for 20 years.  (My = ’83 van with 255K miles still has all the original heater = hoses).

 

I went to NAPA and paged through their catalog of heater = cores until I found what I wanted; 6” x 6” x 2” (I think goes to = an old Ford van).  I built a housing for it, added a centrifugal fan from = Lincoln Surplus.  It mounts in the back of the cabin on my Velocity, ducts = going forward, and has a standard automotive cable control valve in the water = circuit that I can adjust from up front.  Also has 2-speed blower. = Hasn’t flown yet, but in tests it makes a LOT of heat. 

 

(It helps in making a housing if you are not = fiberglass challenged).

 

Al

 

 

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On = Behalf Of Mark Steitle
Sent: Tuesday, December 02, 2003 4:02 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Heaters/defrosters

 

Is there a "best practice" for cabin heat/defrost systems for = rotary

a/c.  Those of you that are flying, how did you approach this item.  It =

seems to me that with all that heat going out the tailpipe, it is a =

no-brainer... except for the carbon-monoxide thing.  Then again, I don't =

want to be scalded with hot ethylene-glycol either.  The exhaust muff = seems

like the lighter and simpler solution.  On the other hand, with proper =

ducting, the heater core could add extra cooling during = climb-out.

 

Comments welcome,

Mark S. (hot oil exchanger is out of the question)

 

 

>>  Homepage:  http://www.flyrotary.com/

>>  Archive:   = http://lancaironline.net/lists/flyrotary/List.html

------=_NextPart_001_0007_01C3B987.EE4CF410-- --Boundary_(ID_8Sg43FczVnTWmLHnjIvytw) Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7BIT Content-disposition: inline >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html --Boundary_(ID_8Sg43FczVnTWmLHnjIvytw)--