Mcdonnell Xf-85 Goblin - The McDonnell XF-85 Goblin was an American experimental aircraft. The Parasite fighter was specifically designed to operate from the Convair B-36 long-range peacekeeping bomber. The idea was to launch the jets in the fusion of the B-36 fighter jet in the air and in case of enemy combat. After the mission, the aircraft carrier has to pick him up. But there is no such thing.
In the early 1940s consideration was given to how the B-36 would provide effective protection. The range of the heavy bombers was too long for any form of protection by fighters, since air refueling facilities had not yet been developed at that time. The parasite decided to evolve into a fighter. This concept was already used successfully in the USA in the 1930s with the Curtiss F9C biplane and carrier aircraft. ie a fixed wing aircraft was not a new thing either. In the US air force at the time there were already successful operations until five fighters/fighter-bombers landed at a Soviet Union aircraft carrier in Sueno. The main principle of having a fighter coupled to a trapeze in the air and pushing it in and out of the aircraft vehicle is to use that trapeze. So the new aircraft had to be compact and have folding wings.
Mcdonnell Xf-85 Goblin
On April 11, 1941, before the Japanese attack on Berry Bay and the United States into World War II, the Air Force specified the development and procurement of an intercontinental bomber that could reach targets 8,000 kilometers away. , 5 tons of bomb payload and a speed of 480 km/h. The resulting flight time of 30 Stunn made conventional defense with single-seat fighter planes impossible. So, in December 1942, the MX-472 project was started as a fighter that completed the B-29, B-35 and B-36 bombers in missions. In 1944, McDonnell Aircraft Company St. Louis was the only manufacturer to respond with four versions of the Hub 27. In January 1945 it was decided that the fighter would be housed entirely in the fuselage - this meant that the B-29 could no longer be used. On October 9, 1945, the Air Force and McDonnell signed a Phase I contract to develop and test the Hub 27E, which was now only growing into the nearly completed B-36.
Mcdonnell Xf 85 Goblin Specifications And Photos
In June and July 1946 in St. Louis, McDonnell showed an example of the fuselage segment of the B-36, which corresponds to bomb bays 1 and 4, the trapezoid bomb and the first shell .P-85, showing r fighters. extension and retraction e. fuselage that could This was done in a provisional contract on June 18, 1946, which was replaced by a final contract on February 2, 1947.
Therefore, McDonnell Aircraft Corporation received an order to build and test two experimental aircraft under the designation XP-85 for the US Air Force. s In addition, the plans and measures necessary to complete the conversion of the B-36 as well as the usual bomb load for the development of the XP-85. Or, even the desire to take into account three XP-85s and no bomb load.
At the same time, the Corvair was instructed to prepare all B-36s from the 23rd delivery onwards to include a trapeze holder in the front bomb bay.
Among the complex changes and modifications to the B-36 were a trapeze, a heated bomb bay, a compression chamber, stores for 2,400 rounds of ammunition and a tank system designed to supply the fighters with fuel from the force bomber. These changes gave the bombers an extra weight of about 1,000 kilograms - not counting the fighter's extra 2,500 kilograms.
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James Smith McDonnell, Green and President McDonnell had a long career as an aircraft engineer, in the occult and parapsychological, and in the 1940s he named several aircraft after characters from the stories, for example FH Phantom (1945), McDonnell F2H Banshee (. 1947) and McDonnell F3H mon (1951).
So the XF-85 was called the "Goblin" and the relatively huge Boeing B-29 aircraft carrier the "Monster" - after the whale from the 1940 animated film Pinocchio.
During the reform of the United States Air Force's designation system, all fighters were given the letter code "F" (fighter, meaning: "fighter plane)" from 1948; until then it was "P" (for study). The XF -85 was called "Cobalin"; however, the original design of the XP-85 can still be found in various publications.
In early 1947, the NACA Molle tested various standards in wind tunnels at the Langley Memorial Aeronautical Laboratory in Hampton (Virginia) for the Army Air Materiel Command. Aerodynamicists have tested the stability around the transverse axis and the real properties in the 1/16 smaller.
Mcdonnell Xf 85
On the other 1/5 scale Moll, slow flight features were tested in conjunction with row boundary fences (for fin stall control) and wide slats. The XF-85 received advanced aerodynamic aids to improve flight characteristics, especially when going forward.
In the fall of 1947, further research reports were made on NACA documents proving that a normal tail unit was retained in 1/16 smaller. Property improvement could not be determined.
Research with 1/10 less aircraft behavior during training and trapezoidal problems has already demonstrated the concept.
He was seriously injured on January 8, 1948 during tests in the NACA Ames aeronautical wind tunnel when he fell "40 to 80 feet" from a height of about 12 meters from a crane. In April 1948 the tests could continue after the hull was repaired.
File:mcdonnell Xf 85 Goblin, National Museum Of The Us Air Force, Dayton, Ohio, Usa. (45613243315).jpg
After it was expected in early 1947 that the B-36 would not be available for flight testing, the B-29 was chosen as the replacement for the XP-85 test flight. Test pilots Robert Edholm (McDonnell) and Kenneth Chilstrom (Air Force) tested the primary suitability of the B-29 on July 22, 1947 at Wright-Patterson Air Force Base. To do this, they flew simulated naval maneuvers with a P-80 on a B-29 with open rocket bombs to test the strategic approaches, possible speed ranges and approach turbulence.
A B-29B-65-BA (See Number 44-84111) built in Atlanta by the Bell Aircraft Company served as a carrier aircraft during the experiment. The bombers were received by the USAAF on August 18, the third day after the Japanese surrender on August 15, 1945, at the Muroc Army Air Force Base test site.
44-84111 flew to McDonnell in St. Louis in 1947, where it was changed to the test and signature of the EB-29B from a.
Extensive flight tests were carried out on the r 44-84111 conversions to check the effects of the newly defined center of gravity, overall weight and drag s through the trapezium and n small bay bombs. For example, the speed of the trapezoidal stretch is reduced by 40 mph (about 60 km/h). As a result of the test, a five-minute cool-down phase was added to the flight plan for flights after climbing to an operating altitude of 20,000 feet (about 6,100 m) - a measure to prevent known overheating problems. Wright R-3350 guns for all B-29s.
Mcdonnell Xf 85 Goblin Underneath Its Mothership, Stock Photo, Picture And Rights Managed Image. Pic. Mev 10992305
A final report from May 1949 deemed the extensive modification of the EB-29B a success, but also showed the potential of an aerodynamically improved trapezoid.
"The B-29 was found to be watertight in all of the XF-85s in the fighter test. However, with a more streamlined trapeze, the B-29 would have been more watertight because the excess horsepower on the hook would have This allows for more hook space at high speeds and easier testing of the XF-85 Parasite Fighter.
A nearly 6 meter high loading pit in Muroc was required to fully extend the holding trapeze under the EB-29B and hang it in the XF-85 receptacle on the holding trapeze prior to the test flight.
Edwin Foresman Schoch was the only person to ever fly the XF-85. As an experienced McDonnell test pilot, he made all test flights and seven free flights with the Goblin from Monster.
Unconventional Thinking: Mcdonnell Xf 85 Goblin
The first flight of the first prototype, the new board on board, the failure of the trapeze deck, ran into the desert.
Flight testing began with the second prototype (46-524) on July 22, 1948. The first test involved only retracting and extending the bomber, running the engine and folding and releasing the wings. . The first free flight took place on August 23, 1948. While trying to dock, a light aircraft encountered turbulence created by a bomber. r Pilot Edwin Foresman Schoch tried desperately to hang on for 10 minutes until the trapeze holding the cockpit collapsed. r "Goblin" belly landing performed at r Air Force Base Edwards (also "Army Muroc Air Force Base"); The pilot was not injured.
The engine was repaired and more than three flights made this turbulence a naval bombardment; just run through these flights.
On the fifth day of the test flight on October 22, 1948, however, the aerodynamic demand on the trapezoid was missing. There was so much turbulence that the XF-85 went completely out of control and flipped over.
File:mcdonnell Xf 85 Goblin Usaf Cockpit.jpg
To increase stability, the engines were provided with small vertical surfaces on the tips of the wings (wings) for flight tests in March 1949 and on April 8, 1949 McDonnell mass n repaired the first prototypes on their first and only flight fly - together r . the final flight test program.
First before the flight
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