Subject: Coordinates for angled duct diffuser.
From: Paul
Date: 10/30/1999, 4:57 PM
To: zz

X-Mozilla-Keys:                                                                                 
Starting at the back end of the 20 inch long rad here are the numbers
for the curve. This is just an eye ball curve but it worked
way better than I expected..

L   Height
0.     0
3     .25
6     .62
9     1.3
12    2.5
15    4.1 
18    6.2
21    7.9

Intake end.

BTW the tubes in this rad run the wrong way.
This is a side to side flow rad.
They run in the long direction. 

The Mustang and most Toyoto rads run the other way.
the flow runs up or down. The short way.

I noticed the flow was a wee bit stronger around 
the center of the rad. I don't have my
flow sensor working yet so I will have better data
on this next week hopefully.

Also this is for a pressure difference down around 
1/2 inch of water, and a flow rate of about
20 fps. I suspect this could change at higher 
pressures and flow rates because of the velocity squared
factor in the resistance of the rad to air flow.
What I am trying to say is the pressure over the
front side of the rad might try to equalize more at 
high flow rates. Pure speculation on my part.
We need to test for this in a real airplane. 

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org