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  • Convair B-36 Peacemaker




    The Convair B-36 "Peacemaker" is a strategic bomber built by Convair and operated by the United States Air Force (USAF) from 1949 to 1959.

    General Information

    The B-36 is the largest mass-produced piston-engined aircraft ever built. It had the longest wingspan of any combat aircraft ever built, at 230 ft (70.1 m). The B-36 was the first bomber capable of delivering any of the nuclear weapons in the U.S. arsenal from inside its four bomb bays without aircraft modifications. With a range of 10,000 mi (16,000 km) and a maximum payload of 87,200 lb (39,600 kg), the B-36 was capable of intercontinental flight without refuelling.


    Entering service in 1948, the B-36 was the primary nuclear weapons delivery vehicle of Strategic Air Command (SAC) until it was replaced by the jet-powered Boeing B-52 Stratofortress beginning in 1955. All but four aircraft have been scrapped.


    The B-36 took shape as an aircraft of immense proportions. It was two-thirds longer than the previous "superbomber", the B-29. The wingspan and tail height of the B-36 exceeded those of the 1960s Soviet Union's Antonov An-22 Antheus military transport, the largest ever propeller-driven aircraft put into production. Only with the advent of the Boeing 747 and the Lockheed C-5 Galaxy, both designed two decades later, did American aircraft capable of lifting a heavier payload become commonplace.


    The propulsion system of the B-36 was unique, with six 28-cylinder Pratt & Whitney R-4360 'Wasp Major' radial engines mounted in an unusual pusher configuration, rather than the conventional four-engine, tractor propeller layout of other heavy bombers. The prototype R-4360s delivered a total of 18,000 hp (13,000 kW). While early B-36s required long takeoff runs, this situation was improved with later versions, delivering a significantly increased power output of 22,800 hp (17,000 kW) total.[25] Each engine drove a three-bladed propeller, 19 feet (5.8 m) in diameter, mounted in the pusher configuration, thought to be the second-largest diameter propeller design ever used to power a piston-engined aircraft (after that of the Linke-Hofmann R.II). This unusual configuration prevented propeller turbulence from interfering with airflow over the wing, but could also lead to engine overheating due to insufficient airflow around the engines, resulting in inflight engine fires.


    The large, slow-turning propellers interacted with the high-pressure airflow behind the wings to produce an easily recognizable very-low-frequency pulse at ground level that betrayed approaching flights.


    Beginning with the B-36D, Convair added a pair of General Electric J47-19 jet engines suspended near the end of each wing; these were also retrofitted to all extant B-36Bs. Consequently, the B-36 was configured to have 10 engines, six radial propeller engines and four jet engines, leading to the B-36 slogan of "six turnin' and four burnin' ". The B-36 had more engines than any other mass-produced aircraft. 


    Number built: 384


    For more information on the development, design, operarional history and variants, click here.

    CONVAIR B36 BM-028.jpg

    CONVAIR B36 nose.jpg

    CONVAIR B36 on display.jpg

    CONVAIR B36.jpg


    Crew: 13
    162 ft 1 in (49.40 m)
    230 ft 0 in (70.10 m)
    46 ft 9 in (14.25 m)
    Wing Area:
    4,772 sq ft (443.3 sq m)
    Empty Weight:
    166,165 lb (75,371 kg)
    410,000 lb (185,973 kg)
    6 × Pratt & Whitney R-4360-53 Wasp Major 28-cylinder 4-row air-cooled radial piston engines, plus 4 × General Electric J47 turbojet engines
    Maximum speed: 435 mph (700 km/h, 378 kn)
    Cruise Speed:
    230 mph (370 km/h, 200 kn)
    Combat range: 3,985 mi (6,413 km, 3,463 nmi), Ferry range: 10,000 mi (16,000 km, 8,700 nmi)
    Rate of Climb:
    1,995 ft/min (10.13 m/s)
    Service Ceiling:
    43,600 ft (13,300 m)

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    This video shows the takeoff of this incredible aircraft.




    One variant was the NB36H Crusader. It was fitted with a nuclear reactor installation for trials, had a revised cockpit and raised nose. This was intended to evolve into the Convair X-6. Only 1 example was built and flown.



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    I saw one of these in the USAF national museum in Dayton OH. It is hard to convey the size of the thing without standing next to one.
    They are ENORMOUS.

    Edited by cscotthendry
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    2 hours ago, facthunter said:

    Funny using names like "Peacemaker" and "Liberator" on machines that rain hell from the sky. Nev


    "fighting for peace" is like "F***ing for virginity".

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    I didn't know much about the B36 & reading the Wiki stuff highlights how huge it is. Crews gave it a slogan of "six turning, four burning" but after numerous engine fires they humorously changed it to  into "two turning, two burning, two smoking, two choking and two more unaccounted for". It used 145 octane Avgas which fouled plugs quickly but a change was a huge job with 336 plugs required. Each engine had a 380 litre oil tank. I didn't find out the fuel capacity or consumption but it must have been massive.

    • Haha 1
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    Most would have had in flight oil transfer, particularly as they had a large endurance capability. You get more plug problems with short stage flights. Even the DC-6 (R 2800 P&W) used 130/145 octane avgas.. Nev.

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