..da plane : 1996 RV-4 (J3-with-a-speed-kit)- N996RV
based at HIO, Hillsboro, OR. Powered by a Lycoming O-320-E2G rated
150hp@2700rpm / 140hp@2450rpm. Prop is a Sensenich 70CM with 79 inch
pitch (cruise prop) limited to 2600 rpm. High speed cruise is ~170
mph TAS at 7500'-8500'. I ran this in one R.A.C.E. race at Jackpot
Nevada in July 2001 and was clocked at 177 mph over the one lap course.
Race altitude was ~7500 msl, but, density altitude was closer to 10,500.
The plane could use substantial aerodynamic fine tuning. New style
pressure recovery wheel and gear leg fairings would add probably 10 mph
to the top speed.
..da engine : Mazda 13B na (normally aspirated),
6-port engine with extensive porting that has turned it into a very large
4-port engine. The front cover is from a 12A so it has motor mounts
on that end. This engine was originally built for 1/4 mile racing
by Pineapple Racing of Portland,
OR. My "armchair estimate" is an anticipated 200 hp @ 8500 rpm.
This will be turning a prop via a gear reduction of 2.85:1 from Real
World Solutions . Cruise rpm will be 6000 turning the prop ~2100.
War-Emergency-Power is 8500 rpm, 3000 at the prop.
