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Let Me Be The First. Tethered Flight Math. & More

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Dick Fowler:
I've find this link very informative...  

http://www.mh-aerotools.de/airfoils/control_line_aero_1.htm

The whole site has some good information.

Archie Adamisin:
If you like that, try out the JAVA prop program.  Very neat and easy to use.

Archie Adamisin
Muncie, Indiana

Alan Hahn:
Another nice prop program (as well as an electric motor program). Look at the bottom of the page for a the prop program. What I like about this particular program is that you can fix a rpm and the look at power and torque needs as the flight speed varies.

http://www.drivecalc.de/

Another bonus is that there are both Windows, Mac, and Linux versions.

Here is a link to some calculations I did for various prop parameters (pitch, diameter, # blades...) which I originally posted in the Electric forum--where the real propeller heads lurk!

http://stunthanger.com/smf/index.php?topic=7574.0

Brett Buck:

--- Quote from: Alan Hahn on June 22, 2009, 09:15:30 AM ---Another nice prop program (as well as an electric motor program). Look at the bottom of the page for a the prop program. What I like about this particular program is that you can fix a rpm and the look at power and torque needs as the flight speed varies.

http://www.drivecalc.de/

Another bonus is that there are both Windows, Mac, and Linux versions.

Here is a link to some calculations I did for various prop parameters (pitch, diameter, # blades...) which I originally posted in the Electric forum--where the real propeller heads lurk!

http://stunthanger.com/smf/index.php?topic=7574.


--- End quote ---

    That's a very useful program - in fact, in about 30 seconds I proved the point that I spent about half a week and a dyno and thrust stand test trying to convince Leonard Neumann (i.e. 4" pitch has a steeper thrust/velocity curve and a lot more static thrust than 6" pitch, when set to the level flight speed.   I also discovered that my *really cheesy* prop simulation was pretty darn close and gave decent results/

    Brett

RandySmith:

--- Quote from: Brett Buck on June 22, 2009, 11:40:46 PM ---    That's a very useful program - in fact, in about 30 seconds I proved the point that I spent about half a week and a dyno and thrust stand test trying to convince Leonard Neumann (i.e. 4" pitch has a steeper thrust/velocity curve and a lot more static thrust than 6" pitch, when set to the level flight speed.   I also discovered that my *really cheesy* prop simulation was pretty darn close and gave decent results/

    Brett

--- End quote ---


Hi Brett

care to share the info about the thrust/velocity curves?

I would be interestes in seeing anything like that

Regards
Randy

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