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rho v^2 = constant
what is density rho at ground and at 20,000 feet?
what is density rho at ground and at 20,000 feet?
At 20,000 ft 0.049 lb/ cubic ft
v^2 = 1405
v = 37.5 mph
Lift = lift Coef * area * (1/2) rho v^2
the lift coef and geometry are the same