wingspan	160
M_cruise	0.8
M_landing	0.2
	
cLalpha_cruise	.0567
cL0	0.144
cMalpha_cruise	-0.062
cM0	-0.199
	
efficiency	0.8872
	
alt_cruise	35000
weight_cruise	160000
	
cd_correction	0
c_f	0.003