1981 Event Rocket-powered ice sled attains 399 kph, Lake George, New York 1959 Event USAF rocket-powered rail sled attains Mach 4.1 (4970 kph), New Mexico 1931 Event 1st rocket-powered aircraft design patented, Robert Goddard 1888 Birthday Ernst Heinrich Heinkel, German inventor, 1st rocket-powered aircraft
