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Yakovlev Yak-18
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The Yakovlev Yak-18 (also transcribed as Jak-18, NATO reporting name Max) was a Soviet tandem two-seat military primary trainer aircraft. Originally powered by one 160 hp Shvetsov M-11FR-1 radial piston engine, it entered service in 1946. It is also produced in China as the Nanchang CJ-5.
mber of the second generation of Russian aircraft designers, and best known for fighter designs, Alexander S. Yakovlev always retained a light aircraft design section.
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The Yakovlev Yak-18 (also transcribed as Jak-18, NATO reporting name Max) was a Soviet tandem two-seat military primary trainer aircraft. Originally powered by one 160 hp Shvetsov M-11FR-1 radial piston engine, it entered service in 1946. It is also produced in China as the Nanchang CJ-5.
Design and development
A member of the second generation of Russian aircraft designers, and best known for fighter designs, Alexander S. Yakovlev always retained a light aircraft design section. In May 1945, Yakovlev initiated design of the Yak-18 two-seat primary trainer. He designed it to replace the earlier Yakovlev UT-2 and Yak-5 in service with the Soviet Air Forces and DOSAAF (Voluntary Society for Collaboration with the Army, Air Force and Navy, which sponsored aero clubs throughout the USSR). In 1944 an advanced version of the UT-2 had been built and featured an enclosed canopy and fixed landing gear which bears a striking resemblance to the new Yak 18. The new aircraft flew a year later, powered by a Shvetsov M-11 five-cylinder (160 hp) radial engine and featuring pneumatically operated retractable main landing gear and a fixed tailwheel. It entered service as a trainer later that year and was built by Yakovlev up until 1956. Examples were exported to China in kit form beginning in 1950. The Chinese began producing license built copies in 1954 with the designation CJ-5.
The Yak 18's greatest claim to fame is its use as a night bomber by the North Korean Air Force during the Korean War. The aircraft were modified with bomb racks on the wing center section and flew over UN troop locations at night to drop bombs and harrass UN forces. The 5 cylinder engine reminded many of the US troops of the sound made by early gasoline powered washing machines earning them the name: "Washing Machine Charlie". The name "Bed Check Charlie" was also used for these night intruders. The Yak 18's along with Polikarpov PO-2's became quite a nusiance until US night fighters began shooting them down.
Other claims to fame for the Yak 18 are an international speed record for class in 1951 as well as being the aircraft used for initial flight training by Yuri Gagarin (1st human in space) and Ken Rowe (No Kum-Sok: defected with a Mig-15 during the Korean War).
Later, as the need for conventional landing gear trainers abated Yakovlev re-designed the Yak 18 with retractable tricycle landng gear and a Ivchenko AI-14RF radial, 224 kW (300 hp)and was designated the Yak-18A. The design proved exceptionally easy to build and maintain, and it continues in production today, 55 years later, in two of its many variants, the four-seat Yak-18T and two-seat Yak-54.
There are an estimated 40 original Yak 18's in existence worldwide. Three are currently flyable in the USA and 3 are flyable in Europe. Approximately 4 other aircraft worldwide are currently being restored for flight. Many are found in major aviation museums worldwide including the National Air and Space Museum in the USA.
The CJ 6a, produced in China, is sometimes quoted as a variant but is a completely different aircraft designed in China by Bushi Cheng and built by Nanchang Aircraft Company.
Operational history
The Yak-18 became the standard trainer for Air Force flying schools and DOSAAF, is in wide use in China, and in many other countries.
Variants
Yak-18
- The original production version.
Yak-18A
- Re-engined version, powered by a 194-kW (260-hp) Ivchenko AI-14 FR engine. Built in large numbers.
Yak-18U
- This version was built in small numbers, but it had retractable tricycle landing gear.
Yak-18P (NATO reporting name: Mouse)
- Single-seat aerobatic aircraft for use by flying clubs. Adaptation of Yak-18 two-seat trainer.
Yak-18PM
- Aerobatic aircraft.
Yak-18PS
- Aerobatic aircraft with retractable tailwheel.
Yak-18T
- Aeroflot training aircraft. The Yak-18T is also a light passenger transport aircraft, with a 4-seat cabin for one pilot and three passengers.
Nanchang CJ-5
- The Yak-18 was built under licence in China as the CJ-5.
Operators
Specifications (Yak-18A)
External links
See also
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