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Martin 162 PBM Mariner


The XPBM-1 prototype flying-boat patrol bomber was originally ordered by the US Navy in 1936. Before it was built, a quarter-size prototype (Model 162A) was constructed and flown. The full-size aircraft was flown for the first time in February 1939.

The production PBM-1 - fitted with two 1,192 kW Wright R-2600-6 radial engines, a dihedral tail and retractable wingtip floats - was ordered in 1938 and 20 of these went into Navy service in 1941. A single XPBM-2 was ordered at the same time as a long-range version specially strengthened for catapult take-off.
The PBM-3, with two 1,267kW Wright R-2600-12 engines, was ordered in quantity in 1940 and deliveries began in 1942. In this version the crew was increased from seven to nine, the armament was revised and the fuel capacity increased. The retractable wingtip floats of the PBM-1 were replaced by fixed floats. In 1942 the PBM-3 was adopted also as a naval transport carrying 20 passengers or 3,629-4,082kg of cargo (PBM-3R). Twenty-six PBM-3B patrol bombers were also used by RAF Coastal Command, delivered under Lend-Lease. At the end of the war a specialised anti-submarine version was also developed as the PBM-3S.


The final two production versions of the Mariner were the PBM-5 and PBM-5A, powered by 1,565kW R-2800-22 and R-2800-34 engines respectively. The last PBM-5A was delivered to the US Navy in April 1949. This version was basically an amphibious version of the PBM-5 and ended its career as a general utility aircraft.


PBM-5A Mariner


630 PBM-5 flying boats were built, followed by 36 PBM-5A amphibians, used for air-sea rescue duties, primarily by the U.S.C.G.


In 1963 the US Navy tested vertical floats designed by General Dynamics/Convair, on a PBM-5.
These made the seaplane a stable working platform for anti-submarine warfare with little motion from 4-5 ft waves.


Engines: 2 x Wright R-2800A-5B, 1250kW
Max take-off weight: 25400 kg / 55998 lb
Empty weight: 14660 kg / 32320 lb
Wingspan: 36.0 m / 118 ft 1 in
Length: 34.4 m / 112 ft 10 in
Height: 8.4 m / 27 ft 7 in
Wing area: 130.0 sq.m / 1399.31 sq ft
Max. speed: 325 km/h / 202 mph
Cruise speed: 240 km/h / 149 mph
Ceiling: 6150 m / 20200 ft
Armament: 8 x 12.7mm machine-guns, 2000kg of bombs
Crew: 7


PBM-5A Mariner
Air-sea rescue amphibian
Engines: 2 x Pratt & Whitney R2800-34, 2,100 h.p.
Wingspan: 118ft
Length: 79ft. 10in
Loaded weight: 60,300 lb
Max speed: over 200 m.p.h.
Ceiling: 20,200 ft.
Max range: 2,900 miles at 143 m.p.h.
Armament: (when fitted) 8x.50 in machine-guns
Bombload: 4,000 lb

Martin PBM 3 D Mariner

Engines: 2 x Wright R-2600-22 Cyclone, 1874 hp
Length: 79.823 ft / 24.33 m
Height: 27.493 ft / 8.38 m
Wingspan: 118.012 ft / 35.97 m
Wing area: 1407.931 sq.ft / 130.8 sq.m
Max take off weight: 58009.1 lb / 26308.0 kg
Weight empty: 33180.8 lb / 15048.0 kg
Max. speed: 184 kts / 340 km/h
Service ceiling: 19800 ft / 6035 m
Wing load: 41.21 lb/sq.ft / 201.00 kg/sq.m
Range: 1947 nm / 3605 km
Crew: 8
Armament: 8x MG cal.50 (12,7mm), 3629kg Bomb./Depth Chrgs.


Martin 162 / PBM Mariner


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