1956 Death Milburn Apt, in X-2 rocket plane reaches 3370 kph, but, dies in crash 1956 Event Bell X-2 sets Unofficial manned aircraft altitude record 126,000'+ 1956 Event Bell X-2 rocket plane sets world aircraft speed record of 3,050 kph 1955 Event Bell X-2 rocket plane taken up for 1st powered flight
