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kj7sr(at)earthlink.net
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 Posted: Tue Oct 17, 2006 8:53 am Post subject: Throttle versus RPM |
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Does anyone have any experience with IVO-Props on a Rotax 503? From what I have read on the Rotax engine it should be set to about 6150 for takeoff. What then when one reaches cruist altitude. I would be interested in hearing how to manage the RPM verses throttle position. My 503 has no manifold guage. So what ratio of throttle position to RPM will not overpressure the engine?
Would appreciate any input.
Chuck
Charles Bloom
kj7sr(at)earthlink.net (kj7sr(at)earthlink.net)
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charlieboccaccio(at)yahoo
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| Posted: Wed Oct 18, 2006 5:40 pm Post subject: Throttle versus RPM |
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Charles:
In your Rotax Operator's manual, you should have a recommended settings table for your engine. This is a table where you have recommended RPM for certain manifold pressures. You will need to have a temporary manifold pressure gage so you can see where your at at the different phases of flight, and from there you can decide what pitch you want for your prop (climb, cruise, or in between) where the angle will not exceed your engine parameters.
Above all, have fun,
Charles Parker\KF3 Rotax 912ULS
Puerto Vallarta, Mexico
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dave
Joined: 22 Sep 2006
Posts: 1382
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| Posted: Thu Oct 19, 2006 4:45 am Post subject: Throttle versus RPM |
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2 strokes don't have a manifold pressure gauge.
Set your prop for static rpm 6200 to 6300 on 503 and try thats.
Watch carefully your egt gauge to keep temps inline with specs
503 is a fine engine.
Throttle postion will vary with prop but it you in over half to 3/4s way are cruise you might be over propped.
A fule flow gauge would be a good indciator as well.
Dave
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