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Old 11-25-2005 | 08:08 AM
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B.L.E.
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From: Austin, TX
Default RE: prop diameter vs pitch


ORIGINAL: smokingcrater

keep in mind the prop also affects how your plane lands. a higher pitch prop on a trainer can turn it into a bear to land, it might idle fast enough the trainer just floats along (or might actually be able to climb a little!)

With high pitch props it can be hard to slow the plane down, especially if your engine does not have a slow idle but, big low pitch props can also make a plane hard to land for a different reason. When the engine is idleing, these props are acting like windmills and brake the plane. This causes the prop to block the airflow over the plane's elevator and the plane does ugly bounces upon landing because the elevator does not have enough control authority to flare the plane.
I have a plane that was a breeze to land deadstick but a bear to land under power, until I learned to open up the throttle a little right before touchdown so that my elevator would have enough control to flare the plane. When I used smaller high pitch props on it, this was not necessary.