1) Artillery ammunition
Found on
https://www.crosswordclues.com/clue/base-bleed
Base bleed is a system used on some artillery shells to increase their range, typically by about 30%. Most of the drag on an artillery shell comes from the nose of the shell, as it pushes the air out of its way at supersonic speeds. Shaping the shell properly can reduce this greatly. However, another powerful source of drag is the vacuum left behi...
Found on
http://en.wikipedia.org/wiki/Base_bleed
No exact match found.
