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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.
During World War II, a few of Martin's most successful designs were the B-26 Marauder [7] and A-22 Maryland bombers, the PBM Mariner and JRM Mars [8] [9] flying boats, widely used for air-sea rescue, anti-submarine warfare and transport.
Despite being largely overshadowed, limited use of the type continued with some operators, such as in the case of the Shin Meiwa US-1A and the Martin JRM Mars. In the 21st century, flying boats maintain a few niche uses, such as dropping water on forest fires, air transport around archipelagos, and access to undeveloped areas. Many modern ...
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. [3] [4] This was followed by an initial production order for 21 PBM-1 aircraft on 28 December ...
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 ...
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 ...
In November 1943, the Navy took delivery of the first of six Martin PB2M Mars. On 30 November, the PB2M completed a 4,375-mile nonstop flight of 28 hours and 25 minutes, delivering 16,000 pounds of cargo from Patuxent River to Natal, Brazil. With the completion of facilities at NAS Honolulu, VR-11 moved its headquarters there in December.
The Hercules is the largest flying boat ever built, and it had the largest wingspan of any aircraft ever flown until the twin-fuselaged Scaled Composites Stratolaunch first flew on April 13, 2019. [ 4 ] [ 5 ] The aircraft remains in good condition.