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Aviation / Aerospace

McDonnell XF-85 Goblin (Parasite Fighter)


Prototype Jet-Powered Fighter / Bomber Escort [ 1948 ]



The XF-85 Goblin was to be a bomber-released parasite fighter but was soon found to be much too impractical.



Authored By: Staff Writer | Last Edited: 01/29/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

VIEW SPECIFICATIONS [+]
The XF-85 Goblin was an attempt by the McDonnell bureau to realize the dream of a "parasite fighter" program that was actually feasible for use in a wartime environment. The basic theory revolving the parasite fighter was not a new one for development of such a fighter was already attempted by German scientists during the Second World War. Nevertheless, the XF-85 Goblin was - at least in the eyes of McDonnell engineers - to be the first successful attempt, though in practice the retrieval process proved to be too impractical and the program was therefore limited to just two prototypes and fully scrubbed.

The XF-85 featured a most basic aerodynamically friendly design with very little in the way of external features. The system featured the post-war development of swept back wings (pioneered by the Germans throughout World War Two) and were of 37 degrees sweep. The Goblin was to be air dropped from a bomber, fly to and engage targets as needed, then return to the bomber by meeting up with the bomber's retractable hook and trapeze combination. Should an emergency had arisen for the diminutive Goblin, a steel skid was installed underfuselage (along with runners at the wingtips for additional landing support) for emergency landings. Armament for the XP-85 consisted of a 4 x 12.7mm (.50 caliber) machine gun array. Crew accommodations amounted to a single pilot. Power was derived from a single J34 type turbojet mounted at rear with a noticeable intake front of the fuselage. The first flight of the XF-85 Goblin prototype occurred on August 23rd of 1948.

The XF-85 proved to be a stable platform that required very little extended flight knowledge for any pilot to fly her. The one - and major issue - reported by pilots of the XF-85 was in the aircraft retrieval process which proved to be impractical when put into practice. With only two prototypes constructed and flying, the program was cancelled. One of the two XF-85 Goblin prototypes was shipped to the United States Air Force Museum in Dayton, Ohio for display. The other resides at the Strategic Air and Space Museum in Ashland, Nebraska.©MilitaryFactory.com
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Specifications



McDonnell - USA
Manufacturer(s)
United States
Operators National flag of the United States
1948
Service Year
United States
National Origin
Cancelled
Project Status
1
Crew
2
Units


AIR-TO-AIR COMBAT
General ability to actively engage other aircraft of similar form and function, typically through guns, missiles, and/or aerial rockets.
X-PLANE
Aircraft developed for the role of prototyping, technology demonstration, or research / data collection.


14.8 ft
(4.50 meters)
Length
21.0 ft
(6.40 meters)
Width/Span
8.2 ft
(2.50 meters)
Height
3,748 lb
(1,700 kilograms)
Empty Weight
5,512 lb
(2,500 kilograms)
Maximum Take-Off Weight
+1,764 lb
(+800 kg)
Weight Difference


1 x Westinghouse XJ34 turbojet delivering 3,000lbs of thrust.
Propulsion
665 mph
(1,070 kph | 578 knots)
Max Speed
47,999 ft
(14,630 m | 9 miles)
Ceiling
12,500 ft/min
(3,810 m/min)
Rate-of-Climb


MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030


STANDARD:
4 x 12.7mm Browning M2 heavy machine guns in nose


0
Hardpoints


XF-85 - Prototype Designation; two prototypes manufactured as s/n 46-0523 and 46-0524.


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Images



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Image of the McDonnell XF-85 Goblin (Parasite Fighter)
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Image of the McDonnell XF-85 Goblin (Parasite Fighter)
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Image of the McDonnell XF-85 Goblin (Parasite Fighter)
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Image of the McDonnell XF-85 Goblin (Parasite Fighter)
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Image of the McDonnell XF-85 Goblin (Parasite Fighter)
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6 / 8
Image of the McDonnell XF-85 Goblin (Parasite Fighter)
Image courtesy of the United States Air Force Museum, Dayton, Ohio.
7 / 8
Image of the McDonnell XF-85 Goblin (Parasite Fighter)
Image courtesy of the United States Air Force Museum, Dayton, Ohio.
8 / 8
Image of the McDonnell XF-85 Goblin (Parasite Fighter)
Image courtesy of the United States Air Force Museum, Dayton, Ohio.

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