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engine thrust

Old 12-24-2007, 10:23 PM
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Default engine thrust

Is there a way to figure thrust without using a scale is there a formula rpm x prop =thrust can anyone help?
Old 12-24-2007, 11:29 PM
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Default RE: engine thrust

http://www.zingerpropeller.com/Thrust.htm

This is just a guide. Prop's are all different so the numbers will vary. Different brand props of the same pitch and diameter will vary....even props of the same brand will vary slightly. It's also a function of atmospheric conditions too. This chart says a 22x8 will pull 24# at 7000 RPM. That's very close to what I've seen people post here using their digital fish scales tied to the plane...and other contraptions.
Old 12-25-2007, 02:03 PM
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Default RE: engine thrust

Go to Pe Reivers web site. He has the most accurate spread sheet thrust calculator I have ever seen. His numbers come out extremely close to my non scientific fish scale test

http://www.prme.nl/forum/index.php?s...f589af3fd7117e
Old 12-25-2007, 03:28 PM
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Default RE: engine thrust

this link is better
[link]http://www.mvvs.nl/prop-power-calculator.xls[/link]

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