flyrotary@lancaironline.net Mailing List Archive

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 <html> <head> <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; = charset=3Dus-ascii"> <meta name=3DGenerator content=3D"Microsoft Word 10 (filtered)"> <style>  </style> </head> <body lang=3DEN-US link=3Dblue vlink=3Dpurple> <div class=3DSection1> 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 </div> </body> </html> ------=_NextPart_001_0007_01C3B987.EE4CF410--

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