Calculating thrust
Calculating thrust
(OP)
Calculating thrust of a bypass fan turban. I have a 31 blade fan that turns 8000 RPM, tip diameter 16 inches 8 inches of the root of the blade I'm trying to figure out how much thrust this fan will produce or some assistance in finding the math.





RE: Calculating thrust
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: Calculating thrust
If you don't actually "have" a fan to measure, then the math gets a bit hairier, and you will need the 2nd of Oates' books (ref. 2) where he discussed blade cascade analysis.
ref. 1 https://www.amazon.com/Aerothermodynamics-Turbine-...
ref. 2 https://www.amazon.com/Aerothermodynamics-Aircraft...
RE: Calculating thrust
RE: Calculating thrust
RE: Calculating thrust
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Calculating thrust
The GE J85 is not a "small" engine.
Sounds fun - less the annoying neighbors that cannot see the "fun" in this project.
RE: Calculating thrust
B.E.
You are judged not by what you know, but by what you can do.
RE: Calculating thrust
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: Calculating thrust
RE: Calculating thrust
RE: Calculating thrust
STF
RE: Calculating thrust
Keith Cress
kcress - http://www.flaminsystems.com
RE: Calculating thrust
RE: Calculating thrust
Each part of the J85 is sized and designed to work within the range of operation that the J85 as a whole was intended for. Taking a piece of it isn't necessarily going to give anything close to optimum performance, since it was not intended for ducted fan operation.
TTFN (ta ta for now)
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