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The Vultee XP-54 Swoose Goose was a prototype fighter built by the Vultee Aircraft Company for the United States Army Air Forces (USAAF).

XP-54
Role Fighter
National origin United States
Manufacturer Vultee Aircraft
First flight 15 January 1943
Status Canceled
Primary user United States Army Air Forces
Number built 2
Variants XP-68 Tornado

Design and development


Vultee submitted a proposal in response to a U.S. Army Air Corps request for an unusual configuration. The Vultee design won the competition, beating the Curtiss XP-55 Ascender and the Northrop XP-56 Black Bullet. Vultee designated it Model 84, a descendant of their earlier Model 78. After completing preliminary engineering and wind tunnel tests, a contract for a prototype was awarded on 8 January 1941. A second prototype was ordered on 17 March 1942. Although it appeared to be a radical design, performance was lackluster, and the project was canceled.

The XP-54 was designed with a pusher engine in the aft part of the fuselage. The tail was mounted rearward between two mid-wing booms, with the twelve-foot propeller between them. The design included a "ducted wing section" developed by the NACA to potentially enable installation of cooling radiators and intercoolers in the inverted gull wing. The Pratt & Whitney X-1800 engine was proposed as the powerplant, but after its development was discontinued the liquid-cooled Lycoming XH-2470 was substituted.

In September 1941, the XP-54 mission was changed from low-altitude to high-altitude interception. Consequently, a turbo-supercharger and heavier armor was added, and empty weight increased to 18,000 lb (5,200 to 8,200 kg).

The Swoose Goose
The Swoose Goose

The XP-54 was unique in numerous ways. The pressurized cockpit required a complex entry system: the pilot's seat acted as an elevator for cockpit access from the ground. The pilot lowered the seat electrically, sat in it, and raised it into the cockpit. Bail-out procedure was complicated by the pressurization system, necessitating a downward ejection of the pilot and seat to clear the propeller arc.[1] Also, the nose section could pivot through the vertical, three degrees up and six degrees down. In the nose, two 37 mm T-9 cannon were in rigid mounts while two .50 cal machine guns were in movable mounts. Movement of the nose and machine guns was controlled by a special compensating gun sight. Thus, the cannon trajectory could be elevated without altering the flight attitude of the airplane. The large nose section gave rise to its whimsical nickname, the Swoose Goose, inspired by a song about Alexander who was half-swan and half-goose: "Alexander was a swoose." – a name shared with the oldest surviving B-17.


Operational history


Flight tests of the first prototype, 41-1210, began on 15 January 1943. Trials showed performance to be substantially below guarantees. Simultaneously, development of the XH-2470 engine was discontinued. Although the Allison V-3420 engine could be substituted, that required substantial airframe changes. Projected delay and costs resulted in a decision to not consider production buys.

The prototypes continued to be used in an experimental program until problems with the Lycoming engines and lack of spare parts caused termination. The second prototype, 42-108994 (but mistakenly painted as 42-1211) equipped with an experimental GE supercharger, made ten flights before it was relegated to a "parts plane" to keep the first prototype in the air.[2]


Specifications (XP-54)


Data from Green and Swanborough 1978, p. 84.

General characteristics

Performance

Armament


See also


Related development

Aircraft of comparable role, configuration, and era

Related lists


Notes


  1. Thompson 1992, p. 118.
  2. Thompson 1992, p. 114.

Bibliography





На других языках


[de] Vultee XP-54

Die Vultee XP-54 (Werksbezeichnung Model 84, inoffiziell auch als Swoose Goose bezeichnet) war ein amerikanisches Jagdflugzeug von 1943, von dem nur zwei Prototypen gebaut wurden.
- [en] Vultee XP-54

[fr] Vultee XP-54

Le Vultee XP-54 Swoose Goose était un prototype de chasseur conçu par Vultee Aircraft pour l’Armée de l’air américaine.

[it] Vultee XP-54

Il Vultee XP-54 era un aereo da caccia monomotore realizzato dall'azienda statunitense Vultee Aircraft nella prima parte degli anni quaranta e rimasto allo stato di prototipo.



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