posted 02-16- 11:20 AM               

dataRowSize indicates the length of each row. dataRows contains the actual data as one giant number list. The first number in each row is the angle of attack. There should be 360 entries from –179 to 180. The next three numbers are Cl, Cd, and Cm respectively. The last three numbers are deltas for Cl, Cd, and Cm one standard deviation out. For laminar flow, there is no variation over time so the values should be all 0. Under stalled/turbulent flow, these numbers will drive a random number generator to simulate the dynamic behavior of the stall.

This all sounds good, but I heard someone (TS?) mention that you do not need a row for every AOA. Is this true? Whoever it was who said this also suggested that you need more data in certain areas, like the stall area... is this true?

I have a text based airfoil file from the OpenPlane demo that I am using as a basis for my airfoil editing application. The application will let you create/edit/rename airfoils as well as convert binary airfoils to the text based version. I will test to make sure I can use this texted based airfoil files in SDOE before I start making my app.

So do we need an entry for each angle of attack? Or just AOA's we want to use? Does it interpolate the values between AOA's for missing samples?

Next, about this up and down airfoil chart thing: How does SDOE use this data? Does it interpolate a value between the "normal" and "up" coef. values for when the aileron is 1/2 way up? Is this how it works?

Much thanks!

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-Sv =FC=

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