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Question: The lift of a swept wing

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Aerowerx

Well-Known Member
Joined
Dec 1, 2011
Messages
6,091
Location
Marion, Ohio
I understand that the lift of a wing does down as it is swept backwards, buy the factor of the cosine of the sweep angle.

For example, for 20 degrees of sweep the loss in lift would be about 6%.

Ok, so what do you do with this information?

One thing I have thought of is to increase the wing area. If you calculate the wing area, given the stall speed, MTOW, and maximum cl, you could apply the factor to the maximum cl.

So now you have a wing area to get the desired stall speed, corrected for sweep. What now? Do you apply the factor again when calculating the design lift coefficient at the desired cruise speed? Or has it already been taken care of by virtue of the increased area?

And if you do apply the factor again, do you multiply or divide to get the design lift coefficient?
 
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