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The Martin JRM Mars is a large, four-engined cargo transport flying boat designed and built by the Martin Company for the United States Navy during World War II. It was the largest Allied flying boat to enter production, although only seven were built.
It received an order for a single prototype XPBM-1 on 30 June 1937. [2] To test the PBM's layout, Martin built a three-eighths scale flying model, the Martin 162A Tadpole Clipper with a crew of one and powered by a single 120 hp (89 kW) Chevrolet engine driving two airscrews via v-belts; this was flown in December 1937.
The Mars was converted by the Navy into a transport aircraft designated the XPB2M-1R. Satisfied with the performance, 20 of the modified JRM-1 Mars were ordered. The first of the five production Mars flying boats entered service ferrying cargo to Hawaii and the Pacific Islands on 23 January 1944. [50]
It was basically a 40% enlargement of the Martin JRM Mars, weighing 250,000 pounds at takeoff and featuring a longer hull and wingspan, being powered by six radial piston engines. No powerplant types were revealed. The Martin 193 lost out to the Hughes H-4 Hercules, and after the end of World War II obviated the urgency for Sky Freighters ...
The Glenn L. Martin Company, also known as The Martin Company from 1917 to 1961, was an American aircraft and aerospace manufacturing company founded by aviation pioneer Glenn L. Martin. The Martin Company produced many important aircraft for the defense of the US and allies, especially during World War II and the Cold War .
Martin JRM Mars: 23 Jun 1942: Flying boat: 7: 39.04 yards (35.70 meters) 66.71 yards (61.00 meters) 73.62 tons: 14.76 tons: Heaviest until the Junkers 390, Largest serial production flying boat Latécoère 631: 4 Nov 1942: Flying boat: 11: 47.57 yards (43.50 meters) 62.77 yards (57.40 meters) 70.27 tons: Pax: 46 Longest until the Convair B-36 ...
August 28 – The U.S. Navy Martin JRM-2 Mars flying boat Caroline Mars arrives in Chicago, Illinois, after a record-breaking nonstop flight of 4,748 miles (7,641 km) from Honolulu, Hawaii, in 24 hours 12 minutes with 42 people and a payload of 42,000 pounds (19,000 kg) on board. [23]
The Hawaii Mars ("redtail"), 30 July 2009. In 1959 four Martin JRM Mars large, four-engined cargo transport flying boats, designed and built by the Martin Company for the United States Navy during World War II, were acquired by Forest Industries Flying Tankers (FIFT) to use as firefighting water bombers.