The Pacific War Online Encyclopedia
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National Archives #80-G-483681
Martin PBM-3C Mariner
|Crew||7 to 8
|Dimensions||118' by 80' by 27'6"
36.0m by 24.4m by 8.4m
|Wing area||1408 square feet
130.8 square meters
|Maximum speed||198 mph at 13,000 feet
319 km/h at 4000 meters
|Cruise speed||135 mph
|Landing speed||76 mph
|Climb rate||7 feet per second
2.1 meters per second
|Service ceiling||16,900 feet
|Power plant||two 1700 hp (1268 kW) R-2600-12 Wright Cyclone 14-cylinder two-row radial engines driving four bladed propellers|
|Armament||1 twin 0.50
1 twin 0.50 nose turret
2 0.50 machine guns in waists
2 0.50 machine guns in tail
|External stores||2000 lbs (910 kg) of bombs or depth charges|
||ASG surface search radar
|Production||1405 of all types at
The Glenn L. Martin Company, Baltimore, MD:
The -3D could carry up to 8000 lbs of ordinance, including two underwing torpedoes.
The -3R was a transport version.
The -3S was an antisubmarine version.
The -5A was an amphibious version of the -5
The Martin Mariner was the successor to the Catalina, and was somewhat overshadowed by its famous predecessor. It was an excellent patrol aircraft that continued in production after the war, but, like most modern aircraft, required much from the pilots and crew. The Mariner was very stable, but had high wing and power loadings. It was capable of carrying a very heavy weapons loadout internally and was an excellent antisubmarine platform.
The concept was first tested with a quarter-scale
single seat prototype, which was followed by a full-size prototype that
first flew on 18 February 1939. This demonstrated the need for the
distinctive dihedral tailplanes. The first production aircraft were
delivered in 1941. Some 25 were given to the British as Lend-Lease in August 1943 but were
returned to the United States six weeks later.
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