*Implemented oswald efficiency estimation
*Adjusted CLmax values to C-5 like values (previous CLmax of 4 was unrealistic)
*Set stall speed to 115kts which is more C-5 like (previously 100kts!)
*Set Vspeeds according to MIL specs outlined at http://www.dept.aoe.vt.edu/~mason/Mason_f/SD1L8.pdf
*Added constraint for 2 failed engines at 3% climb gradient