Cooling air accelerated to match velocity of falling object eliminates drag. 3 meter drop tower with suction fan and specific geometry causes air to accelerate downward at 1 g. Although cooling of molten material released from top is slow because surrounding air moves with it, drop remains nearly spherical.
Drop tower with no aerodynamic drag
NASA Tech Briefs ; 5 , 4
1981-04-01
Miscellaneous
No indication
English
NTIS | 1973
Engineering Index Backfile | 1958
|Aerodynamic Drag and Drag Reduction
AIAA | 2003
|Online Contents | 1998
|