Realistic generic *.par wing profiles?

[ennobee]

[woro90]

I use XFLR5, that means I'm using Xfoil in it. I set an analysis of the airfoil and then manually fill the POLAR section of the .par file. If you download some models from my site, they have some usable polars - the problem of FMS is in the fact that the polars for whole wings work only for straight and level balanced flight. Otherwise the coeficients don't match, because slow landing at 8 deg AOA is not the same as 8 deg AOA pulling G's in fast flight. The Reynolds numbers are very different, so is mostly the drag. Imagine an F3B/F sailplane - would you set the polars for fixed speed in order to simulate tight turns and fast passes during pylon racing (using it as F3F) or for fixed lift in order to simulate behaviour at different speeds during thermalling? This is the problem. And it can not be solved, because the code would get very complex and so would do the .par files.

[ggunners]

ennobee,

FMS 2.8.5 includes 4 different polars. You can see a showing the .par files of the 4 models included with FMS 2.8.5. There are 3 wing POLAR and one control surface POLAR. There are an acrobatic airplane, glider, biplane and electric there to choose from.

Also, par editor includes a calculator for creating simple wing POLARs in FMS. After much experimentation, I use a single POLAR from the Suchoi model for all my FMS airplanes. It works OK. Trying to craft a perfect POLAR for FMS was most difficult.

For glider POLARs, try woro90's.

If you find something that works well, please share it with us.

-- ggunners

[ennobee]

[TreeHugger]