Where do these stories come from? : )
There has been no change to the 2.85 (RD-1C) design. My takeoff RPM is
around 6200 rpm (limited by fixed pitch prop) and top speed rpm is 7450 so
far.
Top speed runs have been limited due to oil mist
blowing out of the crankcase vent at anything above 7000 rpm. Still
working on an oil / air separator needed for air racing. No time for
making this and new prop cuffs so I'll miss the Ohio to Oshkosh race this
year. Look forward to doing it next year in the 20B powered RV-8 which is
moving ahead (finally). I noticed they are separating the formula RV
classes by engine displacement Bwahh Ha Ha Ha! .... :
)
Tracy
MY PSRU is not dissimilar to Tracy's in regard to
using the 2.85 Ford E4OD Planetary. Just differently configured, but then
again I'm led to believe that Tracy has changed the design for the 2.85. I
personally prefer different bearings. I don't
plan on going over 7,500.
Someone mentioned to me Tracy didn't exceed 7,200
on take-off, with the 2.85.
I hoping for 115 to 125hp at 7,500 rpm, I think
that's achievable!
George ( down under)