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Cessna AT-17 Bobcat

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This page is a soft redirect.Cessna AT-17 Bobcat #REDIRECTmw:Help:Magic words#Other
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AT-17 / UC-78 Bobcat
Model T-50
Role

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This page is a soft redirect. five-seat light transport #REDIRECTmw:Help:Magic words#Other
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Manufacturer

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This page is a soft redirect. Cessna Aircraft Company #REDIRECTmw:Help:Magic words#Other
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First flight

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This page is a soft redirect. March 26, 1939 (T-50) #REDIRECTmw:Help:Magic words#Other
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Primary users

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This page is a soft redirect. United States Army Air Forces
Royal Canadian Air Force
United States Navy #REDIRECTmw:Help:Magic words#Other
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Number built

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The Cessna AT-17 Bobcat was a twin-engined advanced trainer aircraft designed and made in the United States, and used during World War II to bridge the gap between single-engined trainers and twin-engined combat aircraft. The AT-17 was powered by two Jacobs R-755-9 radial piston engines. The commercial version was the Model T-50, from which the AT-17 was developed.

Design and development

The AT-17 was a military version of the commercial Cessna T-50 light transport. The Cessna Airplane Company first produced the wood and tubular steel, fabric-covered T-50 in 1939 for the civilian market, as a lightweight and low-cost twin for personal use where larger aircraft such as the Beech 18 would be too expensive. A low-wing cantilever monoplane, it featured retractable main landing gear and wing trailing edge flaps, both electrically actuated. The wing structure was built up of laminated spruce spar beams with spruce and plywood ribs. The fixed tailwheel is non-steerable and full-swivelling. The prototype T-50 made its maiden flight on 26 March 1939.[1]

In 1940, the United States Army Air Corps ordered them under the designation AT-8 as multi-engine advanced trainers.

Operational history

Thirty-three AT-8s were built for the U.S. Army Air Corps, and production continued under the designation AT-17 reflecting a change in equipment and engine types. In 1942, the U.S Army Air Force ( the successor to the Air Corps from June 1941 ) adopted the Bobcat as a light personnel transport and those delivered after January 1, 1943 were designated UC-78s. By the end of World War II, Cessna had produced more than 4,600 Bobcats for the U.S. military, 67 of which were transferred to the United States Navy as JRC-1s. In addition, 822 Bobcats had been produced for the Royal Canadian Air Force as Crane Is, many of which were used in the British Commonwealth Air Training Plan.[2] The aircraft did not last long in North American postwar military service. Few (if any) Bobcats were in service with the United States Air Force when it was formed in September, 1947. Surviving military aircraft were declared obsolete in 1949.[3]

Dubbed the "Bamboo Bomber" by the pilots who flew them, it was one of the aircraft featured in the popular television series "Sky King" of the early-to-mid 50s. The aircraft was replaced in later episodes by the T-50's successor, the all-metal Cessna 310.

Postwar, surplus AT-17s and UC-78s could be converted by CAA-approved kits to civilian standard aircraft allowing their certification under the T-50s original Type Certificate (ATC- 722, issued 3-24-1940).[4] They were used by small airlines, charter and "bush" operators and private pilots. Some were operated on floats. By the 1970s, the number of airworthy aircraft had dwindled as they were made obsolete by more modern types and by the maintenance required by their aging wood wing structures and fabric covering. Since then, several have been restored by antique airplane enthusiasts.

In August 2009, FAA records show 378 T-50s, 10 AT-17s and 30 UC-78s are listed on the FAA registration database.[5][6][7]

In the postwar years, Bobcats continued in military service with Brazil and the Nationalist Chinese.

Variants

T-50
Company design number. Five-seat twin-engined commercial transport aircraft, fitted with Jacobs L-4MB radial piston engines.
AT-8
Military trainer version of the T-50 with two 295 hp (220-kW) Lycoming R-680-9 radial piston engines, 33 built.
AT-17
As the AT-8 but powered by Script error: No such module "convert". Jacobs R-775-9 (L-4) engines, 450 built some later converted to AT-17E.
AT-17A
As the AT-17 but with metal propellers and reduced weight, 223 built. 182 to Canada as Crane IAs and later conversion to AT-17Fs.
AT-17B
As the AT-17A but with equipment changes, 466 built. Subsequent aircraft were built as UC-78Bs.
AT-17C
As the AT-17A but different radio equipment, 60 built.
AT-17D
As the AT-C with equipment changes, 131 built.
AT-17E
AT-17 with gross weight limited to Script error: No such module "convert"..
File:CessnaUC78C.jpg
Cessna UC-78C
AT-17F
AT-17A with gross weight limited to Script error: No such module "convert"..
AT-17G
AT-17B with gross weight limited to Script error: No such module "convert"..
C-78
Military transport version for the United States Army Air Forces, redesignated UC-78 in 1943, 1354 built.
UC-78
C-78 redesignated in 1943; variable-pitch propellers.
UC-78A
17 impressed civilian T-50s
UC-78B
Originally the AT-17B, wooden propellers and reduced weight, 1806 built.
UC-78C
Originally the AT-17D, same as UC-78B with equipment changes, 196 built and 131 AT-17Ds redesignated.
JRC-1
Navy light transport version of the UC-78 with two Jacobs R-775-9 engines, 67 delivered.
Crane I
Royal Canadian Air Force designation for T-50s with minor equipment changes, 640 delivered as light transports.
Crane 1A
182 AT-17As delivered to Canada under lend-lease.

Operators

23x15px Brazil
23x15px Canada
23x15px Costa Rica
23x15px Ethiopia
23x15px France
23x15px Guatemala
Template:Country data Haiti
23x15px Nicaragua
23x15px North Yemen
23x15px Republic of China
23x15px Peru
23x15px Poland
23x15px United States

Specifications (AT-17)

General characteristics

  • Crew: pilot+four
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  • Wingspan: Script error: No such module "convert".
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  • Wing area: Script error: No such module "convert".
  • Empty weight: Script error: No such module "convert".
  • Gross weight: Script error: No such module "convert".
  • Max takeoff weight: Script error: No such module "convert".
  • Powerplant: 2 × Jacobs R-755-9 seven-cylinder, air-cooled, radial piston engine, Script error: No such module "convert". each

Performance

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  • Cruise speed: Script error: No such module "convert".
  • Service ceiling: Script error: No such module "convert".

See also

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Related lists

References

Notes
  1. Wixley 1984, p.13.
  2. Phillips, Edward H: Cessna, A Master's Expression, Flying Books, 1985. ISBN 0911139044
  3. Swanborough, Gordon & Bowers, Peter M: United States Military Aircraft Since 1909, Putnam, 1989. ISBN 0-85177-816-X
  4. Juptner, Joseph P: U.S. Civil Aircraft Series, Vol 8, TAB Books, 1994. ISBN 0-8168-9178-8
  5. http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=CESSNA&Modeltxt=T-50&PageNo=1
  6. http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=CESSNA&Modeltxt=AT-17&PageNo=1
  7. http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=CESSNA&Modeltxt=UC-78&PageNo=1
Bibliography
  • Mondey, David. American Aircraft of World War II (Hamlyn Concise Guide). London: Bounty Books, 2006. ISBN 978-0-7537-1461-4.
  • Wixley, Kenneth E. "Cessna Bobcat:A Production History". Aircraft Illustrated, January 1984, Vol 17 No 1, pp. 13–16. ISSN 0002-2675.
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External links