I have done some analysis on my plane without any control surfaces first but when I put an elevator in my horizontal tail with a ZERO deflection angle (so nothing has really changed since there's no deflection), the behavior of the graph or the performance curve is completely different. Why is that so?
Please help. Thank you.
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There is no reason for type 1 and 2 polars to be different with a zero deflection angle.
If it's a type 7, the analysis will automatically switch to inviscid if there is a flap defined, even if its deflection is zero. This will change the drag and the moments.
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Thank you Andre for the response! Yes, that's why I am confused why they are different. Im using type2 (fixed lift) for the analysis. Attached pic is the graph. Trial 8 (no elevator flap) and Trial 8 with elev 0 deg (with flap - 0 deg).
Hi,
I have done some analysis on my plane without any control surfaces first but when I put an elevator in my horizontal tail with a ZERO deflection angle (so nothing has really changed since there's no deflection), the behavior of the graph or the performance curve is completely different. Why is that so?
Please help. Thank you.
There is no reason for type 1 and 2 polars to be different with a zero deflection angle.
If it's a type 7, the analysis will automatically switch to inviscid if there is a flap defined, even if its deflection is zero. This will change the drag and the moments.
Thank you Andre for the response! Yes, that's why I am confused why they are different. Im using type2 (fixed lift) for the analysis. Attached pic is the graph. Trial 8 (no elevator flap) and Trial 8 with elev 0 deg (with flap - 0 deg).
Mr. Andre,
Thank you.