On 9/29/2023 12:05 PM, victor taylor wrote:
I’m not quite so skeptical. Keep in mind that for racing the prop
would be changed to run the engine at 4200 rpm’s. That allows the
motor to put out around 150 hp. The speed was measured by lap times so
it’s going to be fairly accurate.
With that being said Steve Alderman told me last year that he visited
Kevin and flew formation with that plane with his O-200 powered KR.
Steve’s KR was pretty fast and he said that he was a little faster
than the KR-100. I believe that it did go that fast but it certainly
wouldn’t do it for long at 4200 rpm.
Victor Taylor
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I'm still one or two digits past skeptical. The highest speed listed
for 1004K that I've seen was 205 mph on a time trial. I'm not sure
where the 262 mph came from. Steve Alterman recorded a speed of 193 mph
in a Sun-N-Fun race years ago and if he claimed to be a bit faster that
confirms my doubts. There is no mention in any of the flight reports or
race information that N1004K had an 0-200 capable of producing anywhere
near 4000 rpm or anywhere near 150 hp. A friend of mine in "Race 22", a
Q200, runs an 0-200 with high compression, fuel injection, electronic
ignition and spark advance, and turns it a bit past 3000 rpm and he runs
most races in the 200 to 205 mph range. I'm guessing his Q200 is as
slick as the KR100. Just changing a prop to allow 4000 rpm would not
make it a faster airplane. I'm guessing it would even be slower because
of the greatly reduced pitch. Some rough math indicates you'd need to
turn a 70"P prop at the 4000 rpm range to hit 265 mph mark. An 0-200
with higher compression and electronic ignition would struggle to turn
that prop at 3000 to 3200 rpm.
I consider timed laps on a race course with other aircraft in the
pattern, and with unknown winds, to be the least accurate measure of top
speed of an aircraft. A straight line measured course, known winds,
consistent altitude, would make me a believer.
I still think it's a slick looking bird and would like to see more
built. It would make a great single place crotch rocket for someone.
Larry Flesner
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