Specifications
Year: 1943
Manufacturer(s): Northrop Corporation - USA
Production: 2
Capabilities: Fighter; X-Plane;
Manufacturer(s): Northrop Corporation - USA
Production: 2
Capabilities: Fighter; X-Plane;
Crew: 1
Length: 27.56 ft (8.4 m)
Width: 42.45 ft (12.94 m)
Height: 10.99 ft (3.35 m)
Weight (Empty): 8,699 lb (3,946 kg)
Weight (MTOW): 11,349 lb (5,148 kg)
Length: 27.56 ft (8.4 m)
Width: 42.45 ft (12.94 m)
Height: 10.99 ft (3.35 m)
Weight (Empty): 8,699 lb (3,946 kg)
Weight (MTOW): 11,349 lb (5,148 kg)
Power: 1 x Pratt & Whitney R-2800-29 engine developing 2,000 horsepower driving a three-bladed propeller unit in "pusher" configuration.
Speed: 465 mph (748 kph; 404 kts)
Ceiling: 32,999 feet (10,058 m; 6.25 miles)
Range: 662 miles (1,065 km; 575 nm)
Rate-of-Climb: 3,125 ft/min (952 m/min)
Ceiling: 32,999 feet (10,058 m; 6.25 miles)
Range: 662 miles (1,065 km; 575 nm)
Rate-of-Climb: 3,125 ft/min (952 m/min)
Operators: United States (cancelled)
The XP-56 was fitted with large-area wings, cranked downwards at their outboard sections, and attached to a rather stubby fuselage. Aspiration for the the engine was through intakes integrated directly into the mainplane leading edges to feed the engine buried in the aft section of the fuselage. A sole vertical fin was seated over the rear of the aircraft and there was also a ventral protrusion. The cockpit was mounted at front which gave the pilot a commanding view over the nose with his view to the rear obstructed by the raised fuselage spine. A tricycle undercarriage (wholly retractable) rounded out the list of modern design features.
Power was derived from a single Pratt & Whitney R-2800-29 engine developing 2,000 horsepower and driving a three-bladed propeller unit.
Proposed armament was 2 x 20mm cannons coupled with 4 x 0.50 caliber heavy machine guns, presumably all mounted in the nose or wings or spread across both.
The Black Bullet was initially flown in prototype form on September 23, 1943 though this aircraft was eventually lost during a high-speed ground run exercise that same year. A second prototype followed on March 23, 1944 and incorporated some improvements to the original design including a yaw control system and a larger-area vertical stabilizer. This example underwent a battery of tests only to finally reveal that the aircraft offered no real performance benefits in its unique design and layout when compared to conventionally arranged prop-driven fighters. Additionally, advanced being made in bringing jet-powered fighters along helped to doom such programs.
As such, the XP-56 program was limited to just the two prototype examples, the second ending her days as a museum piece. All development ended on the XP-56 in January of 1946.
As completed, the XP-56 held dimensions that included a length of 27.5 feet, a wingspan of 42.5 feet, and a height of 11 feet. Its empty weight was 8,700lb against a Maximum Take-Off Weight (MTOW) of 12,145lb. Performance specifications with the PW engine in place included a maximum speed of 465 miles per hour, a range out to 660 miles, a service ceiling up to 33,000 feet, and a rate-of-climb of 3,125 feet-per-minute.
Armament
PROPOSED (never fitted):
2 x 20mm cannons
4 x 0.50 caliber heavy machine guns
Variants / Models
• XP-56 "Black Bullet" - Prototype Model Series Designation; 2 examples produced with first prototype lost to accident; second prototype featured larger-area vertical stabilizer, improved wingtip design and yaw control flight system.
• P-56 - Assumed production model designation
