Martin XB-33B Technical Specifications
Service Year: 1942
Type: Proposed High-Altitude Medium / Heavy Bomber
National Origin: United States
Manufacturer(s): Glen L. Martin Company - USA
Production Total: 0
Structural (Crew Space, Dimensions and Weights)
Operating Crew (Typical): 7
Overall Length: 79.07 feet (24.1 meters)
Overall Width: 133.99 feet (40.84 meters)
Overall Height: 23.98 feet (7.31 meters)
Weight (Empty): 83,776 lb (38,000 kg)
Weight (MTOW): 105,822 lb (48,000 kg)
Installed Power and Standard Day Performance
Propulsion: 4 x Wright R-2600-15 radial piston engines developing 1,800 horsepower each and driving three-bladed propellers.
Maximum Speed: 345 mph (555 kph; 300 knots)
Maximum Range: 3,107 miles (5,000 km)
Service Ceiling: 39,370 feet (12,000 meters; 7.46 miles)
Armament / Mission Payload
2 x 0.50 caliber heavy machine guns in nose position.
2 x 0.50 caliber heavy machine guns in dorsal turret.
2 x 0.50 caliber heavy machine guns in ventral turret.
2 x 0.50 caliber heavy machine guns in tail position.
Up to 10,000lb of internally-held conventional drop stores.
Global Operators / Customers
United States (cancelled)
Model Variants (Including Prototypes)
XB-33 "Super Marauder" - Base Project Designation
XB-33 - Twin-engined proposal fitting Wright R-3350 engines of 1,800 horsepower each; two prototypes cancelled.
XB-33A - Four-engined prototype proposal fitting Wright R-2600-15 engines of 1,800 horsepower each; two prototypes cancelled; dimensionally larger than original XB-33 offering.
B-33A - Production model designation