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The AN/CPS-1, also known as the Microwave Early Warning (MEW) radar, was a semi-mobile, S band, early-warning radar developed by the MIT Radiation Laboratory during World War II. It was one of the first projects attempted by the Lab and was intended to build equipment to transition from the British long-wave radar to the new microwave ...
In June 1936, the NRL's first prototype radar system, now operating at 28.6 MHz, was demonstrated to government officials, successfully tracking an aircraft at distances up to 25 miles (40 km). Their radar was based on low frequency signals, at least by today's standards, and thus required large antennas , making it impractical for ship or ...
The first flight on October 2, 1918 [5] was a failure: the plane climbed too steeply after takeoff, stalled and crashed. [6] Subsequent flights were successful, and the aircraft was demonstrated to Army personnel at Dayton: "The Kettering Bug had 2 successes on 6 attempts at Dayton, 1 of 4 at Amityville, and 4 of 14 at Carlstrom."
Tupolev Tu-155, the first aircraft to fly solely on hydrogen. First flight by an aircraft fuelled only with hydrogen: was made by a Tupolev Tu-155 (a modified Tu-154 airliner) powered only by hydrogen on April 15, 1988. [251] A NACA Martin B-57B flew on hydrogen in February 1957, but only for 20 minutes before reverting to jet fuel. [252]
After the United States entered World War I in 1917, Loomis volunteered for military service. He was commissioned as a captain, and rose to the rank of lieutenant colonel. He worked in ballistics at the Aberdeen Proving Ground in Maryland, where he invented the Aberdeen Chronograph, the first instrument to measure accurately the muzzle velocity of artillery shells, and portable enough to be ...
The first aggressive use of balloons in warfare took place in 1849. Austrian imperial forces besieging Venice attempted to float some 200 paper hot air balloons each carrying a 24–30-pound (11–14 kg) bomb that was to be dropped from the balloon with a time fuse over the besieged city.
The P-61 radar operator occupied a separate compartment in the rear of the fuselage accessed from a hatch below. In August 1940, sixteen months before the United States entered the war, the U.S. Air Officer in London, Lieutenant General Delos C. Emmons, was briefed on British research in radar ("Radio Detection And Ranging" as it was then known), which had been underway since 1935, and had ...
A Bat on its hoist. The ASM-N-2 Bat was a United States Navy World War II radar-guided glide bomb [3] [4] which was used in combat beginning in April 1945. It was developed and overseen by a unit within the National Bureau of Standards (which unit later became a part of the Army Research Laboratory) with assistance from the Navy's Bureau of Ordnance, the Massachusetts Institute of Technology ...