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----- Original Message -----
From: keltro@att.net
Date: Friday, October 24, 2003 0:30 am
Subject: [FlyRotary] Re: EWP check valves
Ernest,
I am still planning on remote radiators but not as far to the rear of the Delta as you have indicated. I plan on mounting a GM evaporator on each
side of the a/c to the rear of the firewall between the second and third rib
inboard of the Delta centersection. the large 9.5"x13" evaporators fit very
well here. I am using a NACA report on radiators buried in wings from the 1940's to size, shape and position the inlets and outlets. I will use alum.
tubing and short hose connectors. Not sure of what size yet but will be larger than 5/8" but smaller than 2". I am leaning toward 1.25" or 1.5". I am considering running the alum tube inside a duct that I can put
cooling air through.
Kelly Troyer
I think I'm going to have to follow your lead. I found some engineering data on how to calculate the backpressure caused by tubing, and then worked up a spreadsheet. Inputs are tube diameter and length. Useful outputs are weight and head pressure.
Off the top of my head, the 5/8 tube would only add about 4lbs but require over 2000psi of pressure. the 1.25 tube will add almost 30lbs, but only need 3psi.
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