# Lift and Pressure Question (need help )

1. Nov 30, 2005

### physicsCU

This is the problem:

We are given either a local velocity or local coefficient of pressure. Using one, the other can be solved. Freestream V is given.

Now, if that Cp is the average Cp on the upper surface of a wing and that upper surface provides 3/4 of the lift, what is the coefficient of lift?

How would I solve the integrand of the cl integral?

2. Dec 1, 2005

### enigma

Staff Emeritus
I'm not sure I follow the problem as stated, but

$$c_l=\int_{LE}^{TE}c_p dx$$