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Dennis Haverlah wrote:
Bobby Hughes said he had seen data indicating a wedge duct had the highest pressure near the end of the wedge and lower pressure near the opening.
I have not found any information I feel comfortable to use to design the curved ramp and may try to build a wind tunnel in the cowl on the plane. I should be able to insert several ramps and wedge shapes in the test area and measure air pressure on the back side of the radiator using a sensitive manometer. I have two electric leaf blowers that may provide enough air to run it. I'm planning on a 3 in wide x 4 in high inlet size. Any comments or suggestions?
I used the diagram in chapter 12 of K&W to build a wedge duct to the Mazda oil cooler. The system hasn't had testing other than a makeshift 'wind-tunnel' composed of a leaf blower arrangement. I measured reasonably (<10%) variation across the back of the Mazda oil cooler.
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