Cosmo. Fractionally- probably 1/200 sec.! at that speed, & that is a very Short time! There were reports of air bursts by V2's, well above the ground, so no crater. Don't forget that 3,000 mph equates to 4,400 ft./ second. So in 1/10 second( a blink is about 1/30 sec.) it travels nearly 150yards.( sorry all you metricated people, at least the seconds are right). Lyn. Thanks for your good wishes, a very slow process, more so as we get older. Dave