From: jimp@gonzo.specsol.net

Christopher Howard  wrote:
> Hi, I did some reading up on the basic math for jet aircraft,
> thrust-to-weight ratio, and related concepts. I was trying to relate
> this understanding to propeller driven aircraft, like a small
> single-prop plane. When I see the stats for these small planes in
> magazines, the engine horsepower is listed, along with the power loading
> and empty weight.
>
> I was wondering if it was possible, without diving too deeply into the
> math and details, to roughly figure out the lbf that can be generated by
> a propeller with, say, a 100 hp engine. Maybe by making a bunch of
> simplifying assumptions, like a typical propeller, standard barometric
> pressure, and such like?
>

There is a rule of thumb that a decent propeller makes about 20 lbs
thrust per 10 HP.

Alternately Google "how to calculate propeller thrust".

--
penninojim@yahoo.com

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