Posted by Bill(Wis) on February 13, 2009 at 04:48:00 from (71.249.198.251):
In Reply to: OT-Balistics question posted by Bill Porter on February 12, 2009 at 20:13:07:
Your question reminds me of some testing the Army did at Yuma Proving ground where they were doing exactly that, only with a 175mm Long Tom! They had developed a new fuse for the 175mm shell and wanted to fire some using inert rounds and recover the fuses as undamaged as possible. The solution was to fire them vertically. That way, the round would go right straight up and come to a stop without arcing over and fall back to earth base first thus sparing the fuse from impact damage. They used cables to stabilize the tube and they fired those things for days. Cinetheodolite cameras positioned on adjacent mountaintops took pictures of the rounds from the time they left the tube until they struck the earth. I don't know how high they went. All I did was fly the helicopter out to where they landed where the survey crews could get a fix on us while the observer threw a flag in the hole. Those rounds sunk in so deep that they used a specially built bulldozer (FMC) to dig them out.
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