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Message
Greetings,
I made a short video
yesterday of a single rotor run. The purpose was to demonstrate and
document the prop tip behavior with the stock rubber coupler/damper, so I can
see if it gets any better with the new softer one.
As you can see, it gets
pretty wild at times, particularly when changing rpms. I'm not sure this
is completely abnormal though, because I've watched the Subaru engines on the
RAF2000 gyro do the exact same thing. They even have a bit of tip
wandering too, so some of this may be OK.
During the video, you'll
hear me say 2600 rpm, and at that point, the tips are wandering fore and aft a
bit. The next rpm tested was 3500, and it appears fairly smooth.
You'll note that my throttle control doesn't have much friction, and closes
itself if I don't hold it. By the time I say 3500 rpm into the camera, you
can see that the engine has slowed down considerably, so 3500 is the point where
I get up to come back to the camera, not when I say 3500. For that
reason, 4000 rpm became a hand signal, and appears perfectly smooth.
The video is 60 MB, so not
for the dialup crowd unless you download it overnight. Also, if there's
more traffic than I expect, I may have to shut the link down to preserve my web
space quota for the month.
Rusty
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