Convair B-36 Peacemaker

Convair B-36 Peacemaker
Name	B-36 Peacemaker
Caption	A Convair B-36J Peacemaker in flight.
Type	Strategic bomber
Manufacturer	Convair
First flight	8 August 1946
Introduction	1948
Retired	12 February 1959
Status	Retired
Primary user	United States Air Force
Number built	384
Developed into	Convair YB-60

Convair B-36 Peacemaker was a strategic bomber built by Convair and operated solely by the United States Air Force (USAF) from 1949 to 1959. The largest mass-produced piston-engine aircraft ever built, it had the longest wingspan of any combat aircraft in history. The B-36 was the first bomber capable of delivering any nuclear weapon in the U.S. arsenal without modifications, serving as the primary Strategic Air Command nuclear deterrent for much of the early Cold War.

Development and design

The genesis of the B-36 program can be traced to a 1941 United States Army Air Forces requirement for a bomber with intercontinental range, a direct response to the potential fall of Allied bases in Europe and the Pacific. Consolidated Aircraft (later Convair) won the contract, with the design finalized in San Diego before production moved to Fort Worth, Texas. Its revolutionary design featured a massive 230-foot wingspan and a unique six-engine piston-powered pusher configuration, later augmented by four General Electric J47 turbojet engines in pods under the outer wings. The aircraft's immense size necessitated innovations like a tricycle landing gear with a dual-wheel nose gear and a main gear with four bogies, each carrying two wheels. For defense, it was equipped with remote-controlled, radar-directed 20mm cannon turrets, managed by gunners stationed in the pressurized compartments. The bomb bay was cavernous, capable of carrying over 86,000 pounds of conventional bombs or the massive early Mark 17 thermonuclear weapon.

Operational history

Entering service with Strategic Air Command in 1948, the B-36 never saw combat but was the cornerstone of U.S. nuclear deterrence throughout the early Cold War. It conducted frequent long-range training and show of force missions, including simulated strike profiles against the Soviet Union. The 7th Bomb Wing at Carswell Air Force Base was a primary operator. Its most significant operational test was during Operation Ivy, where it sampled atmospheric debris from the Ivy Mike thermonuclear test. The B-36's ability to loiter for extremely long durations was demonstrated in a 1953 flight that lasted over 48 hours. However, the advent of high-speed, high-altitude surface-to-air missiles and jet interceptors like the Mikoyan-Gurevich MiG-17 diminished its viability. It was gradually phased out in favor of the all-jet Boeing B-52 Stratofortress, with the last operational flight occurring in 1959 from Biggs Air Force Base.

Variants

The initial production model was the B-36A, used primarily for crew training. The B-36B introduced more powerful Pratt & Whitney R-4360 engines and full armament. The definitive piston-engine version was the B-36D, which added four jet engines, dramatically improving takeoff and high-altitude performance. The B-36F featured further engine upgrades. The B-36H had an improved cockpit layout, and the final production model, the B-36J, incorporated structural strengthening, reduced defensive armament, and increased fuel capacity for higher operational ceilings. Specialized variants included the RB-36D and RB-36H reconnaissance models, which carried a crew of 22 and a modular photographic laboratory in a converted bomb bay. The sole YB-60 was a swept-wing, all-jet prototype that lost the competition to the B-52.

Operators

The only operator of the B-36 Peacemaker was the United States Air Force. Within the USAF, it was exclusively operated by Strategic Air Command. Major units included the 7th Bomb Wing at Carswell Air Force Base in Texas, the 11th Bomb Wing at Altus Air Force Base, and the 5th Bomb Wing at Travis Air Force Base. The 95th Bomb Wing at Biggs Air Force Base flew the final operational missions. Training and testing were conducted by units such as the 4925th Test Group (Nuclear) at Kirtland Air Force Base.

Specifications (B-36J)

* Crew: 13 (Aircraft Commander, Pilot, Two Flight Engineers, Navigator, Bombardier, Radio Operator, Two ECM Operators, Four Gunners) * Length: 162 ft 1 in (49.42 m) * Wingspan: 230 ft 0 in (70.10 m) * Height: 46 ft 9 in (14.25 m) * Empty weight: 166,165 lb (75,370 kg) * Max takeoff weight: 410,000 lb (186,000 kg) * Powerplant: 6 × Pratt & Whitney R-4360-53 "Wasp Major" 28-cylinder air-cooled radial piston engines, 3,800 hp (2,800 kW) each * Powerplant: 4 × General Electric J47-GE-19 turbojet engines, 5,200 lbf (23 kN) thrust each * Maximum speed: 418 mph (673 km/h, 363 kn) at 36,400 ft (11,100 m) * Cruise speed: 230 mph (370 km/h, 200 kn) * Range: 10,000 mi (16,000 km, 8,700 nmi) * Service ceiling: 43,600 ft (13,300 m) * Armament: 16 × 20mm M24A1 cannon in eight remote-controlled turrets (later reduced); 86,000 lb (39,000 kg) of ordnance in four bomb bays

Aircraft on display

Several B-36 airframes are preserved in museums across the United States. The only complete B-36J is on display at the National Museum of the United States Air Force at Wright-Patterson Air Force Base in Ohio. A B-36J fuselage is part of the collection at the Pima Air & Space Museum in Tucson, Arizona. The forward fuselage of a B-36J is displayed at the Strategic Air Command & Aerospace Museum near Ashland, Nebraska. Other significant relics include a wing panel at the Castle Air Museum at the former Castle Air Force Base in California and the nose section of RB-36H *51-13721* at the Fantasy of Flight museum in Polk City, Florida.

Category:Military aircraft of the United States Cold War