Le McDonnell XF-85 Goblin è un prototipo di aereo da caccia americano concepito durante la seconda guerra mondiale dalla McDonnell Aircraft. Era destinato a schierarsi dalla baia delle bombe del gigantesco bombardiere Convair B-36 come combattente parassita. Il ruolo previsto dell'XF-85 era quello di difendere i bombardieri dagli aerei intercettori ostili, una necessità dimostrata durante la seconda guerra mondiale. McDonnell costruì due prototipi prima che l'Air Force (USAAF) terminasse il programma.
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McDonnell XF-85 Goblin a spasso
Fotografi
John Heck, Vladimir Jakubov
Localizzazione
Museo Nazionale dell'USAF, Dayton
Foto
96
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General Characteristics and Role
The McDonnell XF-85 Goblin was an experimental jet fighter developed for the United States Air Force (USAF) in the late 1940s. Its highly unusual role was to serve as a “parasite fighter”—a defensive fighter that would be carried and launched from a bomber, specifically the massive Convair B-36 Peacemaker, and recovered mid-air. This concept arose because early jet fighters lacked the range to escort strategic bombers on long-distance missions, leaving them vulnerable to enemy interceptors deep inside hostile territory. The XF-85 was designed to be small enough to fit within the B-36’s bomb bay and featured a unique hinged nose assembly for hooking up to a trapeze system.
Property
Typical Value (XF-85)
Ruolo
Experimental Parasite Fighter
National Origin
Stati Uniti
Produttore
McDonnell Aircraft Corporation
First Flight (unattached)
23 August 1948
Equipaggio
1 (Pilot)
Lunghezza
4.93 m (16 ft 2 in)
Apertura alare
6.44 m (21 ft 1 in)
Gross Weight
2.540 kg (5.600 libbre)
Powerplant and Unique Features
Engine: 1 x Westinghouse J34-WE-22 turbojet engine.
Thrust: 3,000 lbf (13 kN).
Armament: Proposed four .50 caliber (12.7 mm) M2 Browning machine guns (never installed on the prototypes).
Unique Tail: It featured a distinctive cruciform tail and swept wings that folded upwards for stowage inside the bomber.
Recovery System: The plane used a retractable hook in its nose to latch onto a specialized trapeze lowered from the carrier aircraft (initially a modified B-29 Superfortress, later planned for the B-36).
Performance: The intended speed was over 1,000 km/h (620 mph), designed to intercept potential enemy fighters like the MiG-15.
Program Outcome and Legacy
Testing: The recovery phase of the test flights proved extremely difficult, due to the intense turbulence and buffeting behind the carrier aircraft. Pilots reported high difficulty in successfully mating the hook with the trapeze.
Cancellation: The program was cancelled in 1949 after only a few test flights. The mid-air docking procedure was deemed too risky for operational use. Furthermore, the rapid development of aerial refueling technology provided a more practical solution to the bomber escort problem.
Legacy: While unsuccessful, the XF-85 stands as one of the most unique and ambitious attempts in aviation history to solve the strategic bomber escort challenge. It remains a prime example of Cold War experimental aircraft design.
Preservation: Both prototypes built (AF Ser. No. 46-523 and 46-524) survive. One is displayed at the National Museum of the United States Air Force in Dayton, Ohio, and the other at the Strategic Air Command & Aerospace Museum in Ashland, Nebraska.