(
seen on the blackboard), from left to right:
Ernest O. Lawrence,
Arthur H. Compton,
Vannevar Bush,
James B. Conant,
Karl T. Compton, and Loomis In the late 1930s, Loomis's scientific team turned their attention to radio detection studies, building a crude
microwave radar which they deployed in the back of a van. They drove it to a golf course and aimed it at the neighboring highway in order to track automobiles, then took it to the local airport, where they tracked small aircraft. Loomis had visited the
United Kingdom and knew many of the British scientists who were working on radar. Britain, at
war with Germany, was being bombed nightly by the German
Luftwaffe, while America was trying to stay out of the war. British scientists had developed the
cavity magnetron, which allowed their radar to be made small enough for installation in aircraft. In 1940, the British
Tizard Mission visited the
United States, seeking help to mass-manufacture the technology they had invented. On hearing that the British magnetron had a thousand times the output of the best American transmitter, Loomis invited its developers to Tuxedo Park. Because he had performed more work in this area than anyone else in the country, Loomis was appointed by
Vannevar Bush to the
National Defense Research Committee as chairman of the Microwave Committee and vice-chairman of
Division D (Detection, Controls, Instruments). Within a month, he had selected a building on the MIT campus in which to equip a laboratory, dubbing it the
MIT Radiation Laboratory, usually referred to as the
Radiation Laboratory and later known simply as the
Rad Lab. He pressed for the development of radar in spite of the Army's initial skepticism, and arranged funding for the Rad Lab until federal money was allocated. The MIT Rad Lab was managed by its director,
Lee DuBridge. Meanwhile, Loomis assumed his customary function of eliminating the obstacles to research and providing the encouragement that was needed at a time when success still remained elusive. The resulting 10-cm radar was a key technology that enabled the sinking of
U-boats, spotted incoming German bombers for the British, and provided cover for the
D-Day landing. Loomis took advantage of all his business acumen and industry contacts to ensure that no time was wasted in its development. DuBridge later commented, "Radar won the war; the atom bomb ended it." Originally known as "LRN" for Loomis Radio Navigation,
LORAN was a proposal of Loomis. It was the most widely used long-range navigation system until the advent of
GPS. The system was developed at Rad Lab and is based on a pulsed hyperbolic system. A world network of stations once existed. The
United States Coast Guard (USCG) and
Canadian Coast Guard (CCG) ceased transmitting LORAN-C (and joint CHAYKA) signals in 2010. Loomis also made a significant contribution to the development of ground-controlled approach technology, a precursor of today's
instrument landing systems that use radar to enable ground controllers to "talk down" aircraft pilots and help them to land safely when poor visibility makes visual landings difficult or impossible. Loomis was elected to the
American Philosophical Society in 1930, the
National Academy of Sciences in 1940, and received several honorary degrees: from
Wesleyan University he received a D.Sc. in 1932, from
Yale University an M.Sc. in 1933, and from the
University of California an LL.D. in 1941.
President Roosevelt lauded the value of Loomis's work, describing him as being the civilian who was second perhaps only to Churchill, in facilitating the Allied victory in World War II. == Personal life and death ==