Martin PBM-5A Mariner
The Martin factory had built a series of flying boats for the US Navy, to know the Martin Model 117 PM-1, the Martin Model 111 PM-2, Martin Model 120 P3M-1 and -2 and the Martin model 130 Clipper.
In 1937 the Us Navy was looking for an improved and larger successor of the Consolidated PBY. Martin proposed Model 162. To evaluate the model, a ¼ scale model with on 120 hp engine driving two propellers was built. This mode made its first flight in December 1937.
Martin received a contract for one prototype, designated as XPBM-1 (Experimental Patrol Bomber Martin 1) in June.
This aircraft made its first flight in February 1939. Already in December 1937 Martin had received an order for 20 aircraft designated PBM-1. This version had a revised tail-section and two 1600 hp Wright R-2600-6 engines.
The first examples entered service in September 1940.
The PBM-2 was a long-range design, not entering production.
The PBM-3 was equipped with two 1700 hp Wright R-2600-12 engines, more armament and enlarged fuel capacity.
The PBM-5, with two 2100 hp Wright R-2800 made its first flight in May 1943. It had an enlarged fuel capacity and an An/APS-15 radar. 1000 examples were ordered of which about 600 examples were delivered duet o the end of the war. Of the final version, the PBM-5A amphibian 36 examples were built plus four PBM-5s were modified.
- XPBM-1 (Model 162):
- Prototype, with two 1,600 hp Wright R-2600-6 engines.
- PBM-1 (Model 162):
- first production version with five .50 inch machine guns; 21 examples built.
- XPBM-2 (Model 162):
- One modified PBM-1 for catapult tests and long range.
- PBM-3 (Model 162B):
- 32 examples of an improved version with two 1,700 hp R-2600-12 engines.
- PBM-3R (Model 162B): unarmed transport version; 118 examples built plus 31 modified PBM-3s.
- PBM-3C (Model 162C): 274 examples of an improved patrol version with two .50 inch machine guns in nose turret en dorsal turret; one single .50 inch machine gun in tail turret en side positions; on AN/APS-15 radar in a radome in the roof just aft the cockpit.
- PBM-3B (Model 162C): designation for 332 examples ex-RAF Mariner GR.1As after being returned to US.
- PBM-3S (Model 162C): special anti submarine version with reduced armament and enlarged range. 94 examples built plus 62 modified PBM-3.
- PBM-3D (Model 162D): patrol bomber version with two 1,900 hp (1,417 kW) Wright R-2600-22s and expanded armament two .50 inch machine guns in nose, dorsal and tail turret and two single guns in both side positions. 256 examples built.
- PBM-4 (Model 162E):
- Never built version with two 2,700 hp Wright R-3350 engines
- PBM-5 (Model 162F):
- last boat version with two 2,100 hp Pratt & Whitney R-2800 engines; 628 examples built.
- PBM-5E: version with improved radar.
- PBM-5S: light weight anti submarine version.
- PBM-5S2: improved anti submarine version with revised radar.
- PBM-5A (Model 162G): amphibious version.
|Length:||24,3 m||Wingspan:||36 m|
|Height:||8,38 m||Wing area:||- m2|
|Empty weight:||14890 kg||Max. start weight:||27350 kg|
|Max. speed:||340 km/hr||Climbing speed:||- m/min|
|Cruising speed:||175 km/hr|
|Range:||3600 km||Service ceiling:||6035 m|
|Engine type:||Two Pratt & Whitney R-2900-34 Twin Wasp rated 2100 hp each|