Well, I originally planned to build a plenum behind the oil cooler and duct it to a venturi on the bottom of the cowl. Then one of guys at the airport, who's opinion I greatly respect, convinced me to make an "air grabber" of sorts, and force the air into a plenum in front of the oil cooler. I tried every way I could and could not find enough room to put the intake hose into the plenum, or to route and secure the intake hose where it would get a lot of air. So, back to the first plan, and figure out the venturi as the plenum was already configured. Well, that was getting very complicated as there is not much room inside the cowling, due to the crossover exhaust.
So, I decided to put two 2" aluminum tubes through the bottom of the cowl, sort of like very short exhaust pipes, to which I will run my air ducts from the plenum, behind the oil cooler. These will protrude somewhat from the bottom of the cowl, and I think that I should cut them at an angle to create that "sucking" effect. Now for the question. Does anyone have an EDUCATED opinion on the angle, to the air stream, at which I should cut these tubes to get the maximum "suck"? See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2007 - KR Gathering There is a time for building and a time for FLYING and the time for Flying has begun. Daniel R. Heath - Lexington, SC
