Bob Darrah wrote:
 >

 > Paul said (big snip)
 > Obviously I have the sheet metal too close
 > near the bottom of the rad.
 >
 > Maybe, but don't bet on it.  Is the sheet metal actually touching the

fins?

 >
 > Bob Darrah

 Towards the end yes. I know what happens if I go to the other extreme
 with this rad angle.

 With my first test rig (Dec 99) when I used the furnace blower a wall at

the

 end of the duct would cause the air to stack up down there.

 I am sure things change when the angle of the rad changes. Your angle
 at 5 or 7 degrees is much shallower then mine which is about 30 degrees.

 What have you found out so far? I wish you had a digital camera.


 P

Paul,
In the tests with the furnace blower, the results are likely to have been
biased by the non-uniform flow from the blower. They typically have a higher
flow on the side of the duct near the periphery of the blower wheel.  A long
straightening section with egg-crate grill could help smooth it out.

In your car-top test, you should be able to get a more representative flow,
but it might require (probably will) a change in the duct shape.

Bill Schertz
KIS Cruiser #4045

 
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