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Wow, that is 2935
RPM at the prop with a prop tip speed of just under 900 FPS. I am still
too shy to run mine that fast, although I could easily get there.
Interestingly, the calculations say the max corkscrew speed of that prop at that
RPM is only 197mph. He could pick up a little for being really clean, and
maybe some more depending on how they calculate prop pitch.
That makes sense
because according to the program I have your max speed should be 180 mph at 5800
RPM. So you and Tracy seem to be easily exceeding what my program predicts
while it seems to be right on for me. (194 mph at 6000 rpm with my 68x74
prop). That would give me 205mph at 6350rpm... still not fast enough
to beat you c-drive guys. Perhaps the fact that I have an RV6 is slowing
me down, or maybe my prop is not really 74" (or even 71").
Regardless, its
time to get a bigger prop. :-)
Dave
Leonard
BTW, does anyone
know how fast Tracy let his old prop turn? What size is it?
Rusty?
Hi Dave,
According to
Performance Props, Tracy's first prop was finalized at 68" D x 71"
P. According to Tracy, the max he turned was 6350 at 215 MPH. I
haven't made any full speed runs, but have turned it 5800 rpm at 8000 ft, and
196 mph TAS.
Rusty
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