I am GOING to build a P-51 style duct under my RV-4. I am right at that stage and will start in 2 weeks when my kitchen remodel is done. I've gotten the rad from C&R Racing. It's a 7000 series with AN 16 fittings and an air bleed return line. The duct will go from the firewall, with the rad mounted at an angle under the wing spar, and taper back to the fuselage under the passenger seat. It will also incorporate a large cowl flap. I am going to make my own engine cowl with the engine about 5-6 inches forward of the stock RV.( the spinner, that is) Spinner will be larger than stock, probably 14 in dia. My cowl will not have cowl cheeks. Exhaust will be out the right side, and the oil cooler will be a stock one, mounted under the engine, with the exhaust air from that blowing through a plenum which surrounds the exhaust system and exits the hole through which the exhaust pipe exits.

I've been stalled for the longest time while doing other  projects and fulfilling  other obligations. Now it's on to the big push, hope to be done by 2002.

Brian Trubee
Redmond, Wa

 
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