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Old 02-05-2002 | 06:06 AM
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Jazzy
 
Joined: Jan 2002
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From: Fort Walton Beach, FL
Default Thrust formula?

This is not a cut and dry subject... as far as I know.
Thrust will depend on engine, prop, airframe, and what you are trying to accomplish.
You can think of thrust as a column of air the prop produces.
A short high pitched prop will move a long slender column of air while a long low-mid pitch prop will move a shorter wider column of air.
The short high pitched prop generally has low static thrust and only produces it's maximum thrust at speed. Just the opposite for the other prop.
You can figure out static thrust with a soft but strong tether, a pull-scale, and your aircraft.

What have you got and what are you trying to do?