Models View all NASA challenge heat exchanger 3 21 0 Dasa’s BLUFF-BICONE for CFD analysis 1 38 0 LOX tank FOR LAUNCH VEHICLE 2 72 0 Gemini Spacecraft Retrograde Section concept 4 34 0 APOLLO space capsule for CFD analysis 4 170 0 ( Rockot ) launch vehicle payload adapter 7 108 0