Models View all NASA challenge heat exchanger 8 69 1 Dasa’s BLUFF-BICONE for CFD analysis 1 48 0 LOX tank FOR LAUNCH VEHICLE 3 88 0 Gemini Spacecraft Retrograde Section concept 4 42 0 APOLLO space capsule for CFD analysis 4 193 0 ( Rockot ) launch vehicle payload adapter 7 126 0