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Chase YC-122 Avitruc

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XG-18/YC-122 Avitruc
Role

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This page is a soft redirect. Military transport aircraft #REDIRECTmw:Help:Magic words#Other
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Manufacturer

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This page is a soft redirect. Chase #REDIRECTmw:Help:Magic words#Other
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Designer

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This page is a soft redirect. Michael Stroukoff #REDIRECTmw:Help:Magic words#Other
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First flight

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This page is a soft redirect. 18 December 1947 #REDIRECTmw:Help:Magic words#Other
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Produced

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This page is a soft redirect. 1947–1953 #REDIRECTmw:Help:Magic words#Other
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Number built

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This page is a soft redirect. 18 #REDIRECTmw:Help:Magic words#Other
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Developed from

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Developed into

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The Chase XCG-18A and YC-122 Avitruc (known internally as the Chase MS.8) was a military transport aircraft designed by Chase Aircraft and produced in limited numbers in the United States in the late 1940s, initially as a glider, but definitively in powered form. The design was based on the CG-14 cargo glider but was substantially larger and featured all-metal construction. It was a high-wing cantilever monoplane. The fuselage was of rectangular cross-section and featured a loading ramp at its rear. The main undercarriage units were carried at the sides of the fuselage and were fixed, while the nosewheel was retractable. In its powered form, two radial engines were fitted in nacelles in the wings.

Design and development

File:Chase XCG-18.jpg
XCG-18A prototype

The USAAF's experiences with cargo gliders during World War II indicated a role for a similar aircraft in the post-war inventory, but one capable of carrying a substantially heavier load and with greater recoverability than the essentially expendable wartime wooden assault gliders. Chase's CG-14 was selected as a starting point, and in January 1947, the USAAF placed an order for an enlarged, metal version of this aircraft, initially designated XCG-14B but redesignated to XCG-18A to reflect the basically all-new nature of the aircraft. When the prototype flew that December, it was the world's first all-metal transport glider.[1] One of the major improvements was the use of a thinner wing section which allowed high tow speeds and small aircraft like the P-47 fighter being able to tow it into the air and to its release point.[2]

Operational history

In March 1948, the service (now the USAF) ordered four more aircraft under the new designation XG-18A and a fifth to be fitted with engines as the YC-122. The air force eventually lost interest in purchasing assault gliders, but continued with the development of the powered variant, purchasing two more examples for evaluation as the YC-122A and redesignating the second of these as the YC-122B when the original Pratt & Whitney engines were swapped for Wright units. This aircraft would form the basis for the definitive service trials version, the YC-122C.

Nine of these aircraft were ordered and although they performed well in evaluation (first at Sewart AFB, Tennessee, later at Ardmore AFB, Oklahoma), the USAF no longer saw a need for a small transport aircraft and cancelled the project. Despite the short-lived history of the aircraft, it was used extensively at Ardmore AFB. By February 1955, at least one pilot, Captain Phillip C. Gromley of the 16th Troop Carrier Squadron, 463rd Troop Carrier Wing, achieved 1,000 hours in piloting the aircraft.[3] All aircraft were replaced by Fairchild C-123B Providers by July 1955. The last YC-122C assault transport was flown to Tucson, Arizona, on 30 August 1955, for storage at Davis-Monthan AFB. Captain Gromely is recorded as making the final flight of a YC-122C to Tucson. The remaining machines served on in utility roles until 1957.

Following their retirement, the fuselage of one of the YC-122s was used in the construction of the Hiller X-18.

Variants

Chase MS.7
Company designation for the XCG-14B / XCG-18A
XCG-18A
XCG-14B re-designated
XG-18A
revised glider version (4 built)
YC-122
prototype powered version, an XG-18A with Pratt & Whitney R-2000-11 engines (one built)
YC-122A
refined version of the YC-122 (two built)
YC-122B
YC-122A re-engined with Wright R-1820-101 engines (one converted)
YC-122C
definitive service trials version (nine built)

Operators

23x15px United States

Specifications (YC-122C)

Data from Jane's All The World's Aircraft 1951–52[4]

General characteristics
  • Crew: Two pilots
  • Capacity: 30 troops or 24 stretchers or cargo
  • Length: Script error: No such module "convert".
  • Wingspan: Script error: No such module "convert".
  • Height: Script error: No such module "convert".
  • Wing area: Script error: No such module "convert".
  • Aspect ratio: 11.25:1
  • Empty weight: Script error: No such module "convert".
  • Max takeoff weight: Script error: No such module "convert".
  • Powerplant: 2 × Wright R-1820-101 9-cylinder air-cooled radial piston engine, Script error: No such module "convert". each

Performance

  • Maximum speed: Script error: No such module "convert".
  • Cruise speed: Script error: No such module "convert".
  • Stall speed: Script error: No such module "convert".
  • Range: Script error: No such module "convert". with maximum cargo
  • Service ceiling: Script error: No such module "convert".
  • Rate of climb: Script error: No such module "convert".

See also

Related development
Aircraft of comparable role, configuration and era

Related lists

References

Notes

  1. ^ World Aircraft Information Files, File 891 Sheet 26. London: Bright Star Publishing.
  2. ^ "Combat Glider Carries 30 Men." Popular Mechanics, April 1948, p. 154.
  3. ^ Simmons, G. "Chronological Reminders Of The Past." Ardmore Air Force Base, 2014. Retrieved: 26 January 2014.
  4. ^ Bridgman 1951, pp. 214c–215c.

Bibliography

  • Bridgman, Leonard. Jane's All The World's Aircraft 1951–52.London: Sampson Low, Marston & Co. Ltd, 1951.
  • Taylor, Michael J. H. Jane's Encyclopedia of Aviation. London: Studio Editions, 1989. ISBN 0-517-69186-8.
  • World Aircraft Information Files, File 891 Sheet 26–27. London: Bright Star Publishing, 1989.
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