Bobby, I am going to bring down a leaf blower with my anemometer and take measurements. Will add some turning vanes and test on the ground. This is the tinkering I like to do, now that I have a flyable plane. Holly crap, 48lbs for electric prop?

Charlie, thank you for the pictures (and videos). I wonder with my digital electronics, if I can get accurate enough to measure the pluses. Place two pitot tubes facing front and back inside the ducting. Hmm interesting. I agree with you that the wedge in theory is different than in practice. My ducts are the same idea as yours, so will add the turning vanes.

Jeff, I wish we could exit out exhaust out the sides like in the Bull Moose. I think with our high velocity of exhaust exit speed, we must be able to harness that energy to help pull air out of the cowl. Just a trade off of having a short exhaust dumping out, or long exhaust under the cowl.

Le Roux, thank you for the pictures. Right now I'm trying to duct my side oil rad, down and out the cowl. If I need to get a bigger oil rad, I'll have to move things around and add side adjustable cowl louvers I think.