09-25-2009, 02:35 AM
1) backfire in an automotive engine caused by early ignition timing will give a pop,pop,pop. Can sound just like automatic weapon when the gas is released ...
2) see mythbusters about returning bullets .... if fired in the air... they will not land with the same force or enough impact to do real harm
hope it was car exhaust... Jerry has enough of a workload
from mythbusters:
9mm 4,000 ft, 37 seconds
Terminal velocity of a falling bullet
Adam built an acrylic wind tunnel (much like the one in the Penny Drop myth). Air was shot up through the bottom and a bullet was dropped into the chamber. The terminal velocity was calculated based on the speed of the air needed to make the bullet stop falling. They figured that the terminal velocity was 100mph (150 ft/s). The wind tunnel also showed that the most stable falling position for the bullets was on their side.
aloha
edit added mythbusters info
2) see mythbusters about returning bullets .... if fired in the air... they will not land with the same force or enough impact to do real harm
hope it was car exhaust... Jerry has enough of a workload
from mythbusters:
9mm 4,000 ft, 37 seconds
Terminal velocity of a falling bullet
Adam built an acrylic wind tunnel (much like the one in the Penny Drop myth). Air was shot up through the bottom and a bullet was dropped into the chamber. The terminal velocity was calculated based on the speed of the air needed to make the bullet stop falling. They figured that the terminal velocity was 100mph (150 ft/s). The wind tunnel also showed that the most stable falling position for the bullets was on their side.
aloha
edit added mythbusters info