Martin P7M SubMaster

The Martin P7M was an unbuilt aircraft designed by the Glenn L. Martin Company in the 1950s. The design was initiated to meet a requirement of the United States Navy (USN) for an anti-submarine warfare flying boat.

P7M
Role anti-submarine warfare (ASW) flying boat
Manufacturer Glenn L. Martin Company
Primary user United States Navy
Number built 0 (mock-up only)

Design and development

The design was for a flying boat that would make use of boundary layer control (BLC) to achieve slow speed flight. It was intended that this would enable the aircraft to land on the open ocean in rough seas and deploy a dipping sonar. Martin proposed a variant of the P5M Marlin, the P5M-3, to take advantage of this phenomenon.

Martin continued development of the P5M-3 under the designation P7M Submaster, introducing two General Electric J85 BLC gas generators, one in the rear of each outer engine nacelle. A mock-up was built, but the P7M, Convair XP6Y and Grumman G-132 were all cancelled when the US Navy abandoned their open-ocean seaplane requirement.[1]

Specifications (P7M projected)

General characteristics

  • Length: 136 ft (41 m)
  • Wingspan: 111 ft 7 in (34.01 m)
  • Height: 39 ft (12 m)
  • Wing area: 2,500 sq ft (230 m2)
  • Powerplant: 4 × Wright R-1820-42 radial piston engines, 1,525 hp (1,137 kW) each
  • Powerplant: 2 × General Electric YJ85-GE-1 turbojet gas generators for BLC in rear of outer nacelles

Performance

  • Maximum speed: 400 mph (650 km/h, 350 kn)
  • Range: 1,400 mi (2,200 km, 1,200 nmi)
  • Service ceiling: 25,300 ft (7,700 m) service ceiling

Armament

  • Missiles, bombs, and depth charges on external hard-points

References

  1. ^ Johnson, E.R. (2009). American flying boats and amphibious aircraft : an illustrated history. Jefferson, N.C.: McFarland & Co. pp. 349–353. ISBN 978-0786439744.
Convair XP6Y

The Convair P6Y was an unbuilt aircraft designed by Convair in the 1950s. The design was initiated to meet a requirement of the United States Navy (USN) for an anti-submarine warfare seaplane.

Glenn L. Martin Company

The Glenn L. Martin Company 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. During the 1950s and 60s, the Martin Company moved from the aircraft industry into the guided missile, space exploration, and space utilization industries.

In 1961, the Martin Company merged with American-Marietta Corporation, a large sand and gravel mining company, forming Martin Marietta Corporation. In 1995, Martin Marietta merged with aerospace giant Lockheed to form the Lockheed Martin Corporation.

Grumman G-132

The Grumman G-132 was an unbuilt aircraft designed by Grumman in the 1950s. The design was initiated to meet a requirement of the United States Navy (USN) for an anti-submarine warfare seaplane.

List of aircraft (Ma)

This is a list of aircraft in numerical order of manufacturer followed by alphabetical order beginning with 'M'.

List of military aircraft of the United States (naval)

This list of military aircraft of the United States (naval) includes prototype, pre-production and operational types designations under the 1922 United States Navy aircraft designation system, which was used by the United States Navy, the United States Marine Corps, and the United States Coast Guard.

Prototypes are normally prefixed with "X" and often unnamed (note that these are not the same as the experimental X-planes, which are not generally expected to go into production), while pre-production models are usually prefixed "Y".

For aircraft designations prior to the adoption of this system, see List of military aircraft of the United States (1909–19).

For aircraft designations under the U.S. Army Air Force/U.S. Air Force USAF system or the post-1962 Tri-Service system and aircraft currently in service, see List of military aircraft of the United States.

Martin and Martin Marietta aircraft
Model numbers
Airliners
Attack aircraft
Bombers
Maritime patrol
Military transports
Military trainers
Scout/Torpedo bombers
Reconnaissance aircraft
Martin Marietta
USN/USMC patrol aircraft designations 1923–1962
Patrol
Patrol Bomber
Patrol Torpedo Bomber

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