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Description
The Convair XC-99, AF Ser. No. 43-52436, is a prototype heavy cargo aircraft built by Convair for the United States Air Force . It was the largest piston-engined land-based transport aircraft ever built, and was developed from the Convair B-36 bomber, sharing the wings and some other structures with it. The first flight was on 24 November 1947 in San Diego, California , and after testing it was delivered to the Air Force on 26 May 1949. The Convair Model 37 was a planned civil passenger variant based on the XC-99 but was not built.

Role: Heavy transport
Manufacturer: Convair
First flight: 24 November 1947
Introduction: 26 May 1949
Retired: 1957
Primary user: United States Air Force

Number built: 1
Developed from: Convair B-36 Peacemaker
Type: Prototype
Serial: 43-52436
Total hours: 7,400 hours
Preserved at: National Museum of the United States Air Force in Dayton, Ohio

General characteristics
Crew: Five duty + five reserve crew
Capacity: 400 troops
Payload : 100,000 lb (45,000 kg)
Length: 182 ft 6 in (55.64 m)
Wingspan : 230 ft 0 in (70.12 m)
Height: 57 ft 6 in (17.53 m)
Wing area: 4,772 ft² (443.5 m²)
Empty weight : 135,232 lb (61,469 kg)
Loaded weight: 265,000 lb (120,455 kg)
Max. takeoff weight : 320,000 lb (145,455 kg)
Powerplant : 6 × Pratt & Whitney R-4360 -41 Wasp Major 28-cylinder air-cooled radial engine , 3,500 hp (2,611 kW) each
Performance
Maximum speed : 307 mph (267 knots, 494 km/h)
Range : 8,100 mi (7,043 nmi , 13,041 km)
Service ceiling : 30,000 ft (9,150 m)

Description
The Convair XC-99, AF Ser. No. 43-52436, is a prototype heavy cargo aircraft built by Convair for the United States Air Force . It was the largest piston-engined land-based transport aircraft ever built, and was developed from the Convair B-36 bomber, sharing the wings and some other structures with it. The first flight was on 24 November 1947 in San Diego, California , and after testing it was delivered to the Air Force on 26 May 1949. The Convair Model 37 was a planned civil passenger variant based on the XC-99 but was not built.

Role: Heavy transport
Manufacturer: Convair
First flight: 24 November 1947
Introduction: 26 May 1949
Retired: 1957
Primary user: United States Air Force

Number built: 1
Developed from: Convair B-36 Peacemaker
Type: Prototype
Serial: 43-52436
Total hours: 7,400 hours
Preserved at: National Museum of the United States Air Force in Dayton, Ohio

General characteristics
Crew: Five duty + five reserve crew
Capacity: 400 troops
Payload : 100,000 lb (45,000 kg)
Length: 182 ft 6 in (55.64 m)
Wingspan : 230 ft 0 in (70.12 m)
Height: 57 ft 6 in (17.53 m)
Wing area: 4,772 ft² (443.5 m²)
Empty weight : 135,232 lb (61,469 kg)
Loaded weight: 265,000 lb (120,455 kg)
Max. takeoff weight : 320,000 lb (145,455 kg)
Powerplant : 6 × Pratt & Whitney R-4360 -41 Wasp Major 28-cylinder air-cooled radial engine , 3,500 hp (2,611 kW) each
Performance
Maximum speed : 307 mph (267 knots, 494 km/h)
Range : 8,100 mi (7,043 nmi , 13,041 km)
Service ceiling : 30,000 ft (9,150 m)