Martin Aircraft Company
Martin JRM Mars
First flight 23 June 1942 Coulson Flying Tankers
Produced 1945–1948, built 7
General Info
Martin JRM Mars
 |
|
| General information | |
|---|---|
| Type | Flying boat |
| National origin | United States |
| Manufacturer | Glenn L. Martin Company |
| Status | Retired |
| Primary users |
United States Navy (historical)
|
| Number built | 7 |
| History | |
| Manufactured | 1945–1948 |
| Introduction date | 30 November 1943 |
| First flight | 23 June 1942 |
| Retired | 1956 (USN) 2024 (Civilian) |
| Developed into | Martin 193 |
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History Martin Aircraft Company
Martin JRM Mars
First flight 23 June 1942 Coulson Flying Tankers (historical)
Produced 1945–1948 Number built 7
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. The United States Navy contracted the development of the XPB2M-1 Mars in 1938 as a long-range ocean patrol flying boat, which later entered production as the JRM Mars long-range transport.
Four of the surviving aircraft were later converted for civilian use to firefighting water bombers. Two of the aircraft still remain based at Sproat Lake just outside of Port Alberni, British Columbia, although neither is operational..
Operational history
U.S. Navy service
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Martin Aircraft Company, Martin JRM Mars
First flight 23 June 1942 Coulson Flying Tankers
Produced 1945–1948 Number built 7
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Martin Aircraft Company
Martin Aircraft Company
Martin JRM Mars
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General characteristics
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Role Flying boat National origin United States Manufacturer Glenn L. Martin Company First flight 23 June 1942 Introduction 30 November 1943 Retired 1956 (USN)
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Powerplant
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Status Inactive Primary users United States Navy (historical)
- Forest Industries Flying Tankers (FIFT) (historical)
- Coulson Flying Tankers (historical)
Produced 1945–1948 Number built 7 Developed into Martin 193
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Specifications
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- Crew: four (with accommodations for a second relief crew)
- Capacity: JRM Mars - 133 troops, or 84 litter patients and 25 attendants or 32,000 lb (15,000 kg) payload, including up to seven Willys MB jeeps
- Water/foam load: Mars waterbomber (27,000 kg)
- Length: 117 ft 3 in (35.74 m)
- Wingspan: 200 ft 0 in (60.96 m)
- Width: (4.11 m) Hull beam
- Height: 38 ft 5 in (11.71 m) afloat, 48 ft (15 m) beached
- Hull draught: 5 ft 6 in (1.68 m)
- Empty weight: (34,279 kg)
- Powerplant: 4 × Wright R-3350 Duplex-Cyclone 18-cylinder radial engines, 2,500 hp (1,900 kW) each
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Performance
- Maximum speed: (356 km/h,
- Cruise speed: 190 mph (310 km/h
- Range: 4,900 mi (8,000 km,
- Service ceiling: 14,600 ft (4,500 m)
- Drop speed: 138 mph (222 km/h)
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