Understanding Polars

[fishdude]

I am interested in making some bagged wings and the airfoil software (Profili) just happens to have polar graphs on it. I would like to learn how to interpret these, is ther a book, guide etc you can point me to.
Thanks

Fish

[Ricardo RW]

Martin Simons' Model Aircraft Aerodynamics, it's worth the reading.

I've got the fourth edition from Amazon, this year.

Also try Understanding Polars Without Math, A guide to getting the most from polar diagrams by Bill & Bunny (B2) Kuhlman, with Bill Kubiak (http://www.b2streamlines.com/books/UPwoM.html)

[BMatthews]

Seems to me there was a thread or two way back that explained polar reading complete with some charts. Try some searches within the MS forum.

[Ricardo RW]

If you find any of those threads please post them here :D

[mharms]

A quick search brought up these:

http://www.rcgroups.com/forums/showthread.php?t=531108

http://www.rcgroups.com/forums/showthread.php?t=131112

http://www.rcgroups.com/forums/showthread.php?p=4425628

http://www.rcgroups.com/forums/showthread.php?p=4701701

I think there are some links posted in the above threads that should be helpful too.

Mark

[Ricardo RW]

Mark, thanks for your effort, there are a lot to study.

[Batmanwpg]

Try this website http://www.mh-aerotools.de/airfoils/index.htm

Also Quite Flyer magazine ran a good series of articles by Martin Simons on this very topic about a year ago.