brian whatcott wrote:
Stealth Pilot wrote:
/snip/ it is the air below pushing
you up that lifts the wing.
Stealth Pilot

In most circumstances, suction on the upper surface contributes about
2/3 rds of the lift, and pressure on the lower surface contributes about
1/3 rd.
That's one reason which rib stitching for rag wings is a biggy.

Brian W


At high angle of attach - maybe 1/3 on the bottom.
Especially along the leading edge.

At cruise, I believe the lower surface is closer to ambient pressure.