At 10:25 PM 5/8/2006, you wrote: >Mark: >By NACA ducts do you mean "scavenger" exhaust systems >where the open exhaust pipe is in the narrow throat of a venturi >like exhaust stack to aid in reducing exhaust back pressure and >cool the exhaust? >Don > ------------------------------------------------------------------------
Check out : http://home.hiwaay.net/~langford/nacaducts/02082310.jpg to see what he means. Larry Flesner
