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The US Navy made several attempts to gain the benefit of high over-target performance combined with long range by introducing mixed powerplant. The Martin Model 219 patrol bomber represented one of the results of such a specification, two XP4M-1 prototypes being ordered on 6 July 1944. The first was flown on 20 September 1946 as a cantilever shoulder-wing monoplane with retractable tricycle landing gear. Its powerplant comprised two 2218kW Pratt & Whitney R-4360-4 Wasp Major radial engines, but each nacelle also incorporated a 17,350kg thrust Allison J33-A-17 turbojet. After a protracted development programme 19 P4M-1 production aircraft were built, the first being delivered to US Navy Squadron VP-21 on 28 June 1950, and all served with this unit. Most of them were converted into P4M-1Q Elint aircraft, one being shot down.
| MODEL | P4M-1 |
| ENGINE | 2 x Pratt Whitney R-4360-20A piston engines, 2424kW + 2 x Allison J33-A-10A, 2087kg |
| WEIGHTS |
| Take-off weight | 40000 kg | 88185 lb |
| DIMENSIONS |
| Wingspan | 34.75 m | 114 ft 0 in |
| Length | 25.50 m | 83 ft 8 in |
| Height | 7.95 m | 26 ft 1 in |
| Wing area | 121.79 m2 | 1310.94 sq ft |
| PERFORMANCE |
| Max. speed | 660 km/h | 410 mph |
| Ceiling | 10545 m | 34600 ft |
| Range | 4570 km | 2840 miles |
| ARMAMENT | 2 x 20mm cannons, 4 x 12.7mm machine-guns, 2700kg of bombs |
Tom Glass, tofr5gl(@)yahoo.com, 26.07.2008
Unique, rare aircraft. "Corncob" recips, hidden jets. Most appreciative of crews who flew out of NAS Iwakuni. VP-9 P2V vet.
H W Thornhill, Harlen(@)consolidated.net, 17.05.2008
I served with VP-21 from 1952-1955. Worked on P4M-1s in 1952 before the squadron transitioned to P2Vs. Removed many a stress plates from the upper wing surface of the P4M during a check. I still have pictures of the aircraft and a large one presented to all personnel by the Martin company just before the aircraft left to be converted to P4M-1Q and sent to Port Lyauty.
Len Nielsen, lima294(@)cox.net, 02.05.2008
saw one on the ramp at NAS, Moffett Field, in 1959?? very noisy on take-off
Gerald L. Tripp, trippg748(@)roadrunner, 19.04.2008
Yes I spent many hours flying in the P4M-1Q with VQ-2 out of Port Lyaute, Morroco. '55to '57. No ejection seats.Come to think of it we never had a bailout drill. The plane did have a small hydro plane that could be manually lowered in place. It was just aft of the forward turret.
Bob Brewer, rgb927(@)bellsouth.net, 29.06.2007
Did the Martin P4M have any ejection seats? How were emergency bailouts performed?
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Do you have any comments concerning this aircraft ?
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