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Yakovlev Yak-16

From Alfawiki
Yakovlev Yak-16
Company typeAircraft
IndustryAerospace
Founded1947
FounderYakovlev Design Bureau (OKB)
Headquarters
Soviet Union
ProductsLight transport aircraft


Template:Infobox aircraft

The Yakovlev Yak-16 (NATO reporting name Cork) was a Soviet light transport aircraft that took to the skies for the first time in 1947. Two prototypes were constructed, one configured for passenger use and another designed as a military cargo variant. Despite successful testing, neither model entered mass production since the Antonov An-2 was deemed more adaptable for the intended roles.

Development

Following the conclusion of World War II, the GVF (Grazdahnskij Vozdushnyj Flot—Civil Air Fleet) issued a specification for a passenger aircraft intended to serve routes with limited demand, where deploying a larger Lisunov Li-2 was not economically viable. The requirement called for an aircraft capable of transporting ten passengers across approximately 800 km (500 mi) at a cruising speed near 290 km/h (180 mph), powered by two 700-horsepower (520 kW) Shvetsov ASh-21 radial engines. In February 1946, the Yakovlev design bureau (OKB) was assigned to develop this aircraft, aiming to have the first prototype ready for State acceptance tests by 1 November 1946.[1] However, due to the bureau’s existing workload, this timeline proved unrealistic, and the prototype's completion was postponed until August 1947. Simultaneously, the specification was updated to require a minimum speed of 350 km/h (220 mph) at sea level and mandated that the military variant be equipped with a dorsal turret armed with a single 20 mm (0.79 in) cannon.[2]

The Yak-16 featured a low-wing, twin-engine monoplane design bearing resemblance to the Li-2. Its semi-monocoque fuselage was constructed from metal and housed a cockpit for two crew members along with seating for ten passengers, complemented by a lavatory and luggage compartment. While the tail structure was metal-skinned, its control surfaces were covered with fabric. The wing assembly consisted of three metal sections—a rectangular center section flanked by trapezoidal outer panels—built around two spars. The main landing gear retracted forward into the engine nacelles but left the wheels partially exposed; in contrast, the tailwheel remained fixed. Each Shvetsov ASh-21 engine was enclosed within NACA cowlings and drove two-bladed VISh-11V-20 variable-pitch propellers.[3]

The initial prototype, commonly designated as Yak-16-I, completed its maiden flight on 24 September 1947 and demonstrated excellent controllability even when operating on a single engine; it was also capable of climbing under such conditions. Early in 1948, it successfully passed State acceptance trials conducted by the NII GVF (Nauchno-Issledovatel'skiy Institut Grazhdanskogo Vozdushnogo Flota—Scientific Test Institute for Civil Air Fleet).[4]

The military transport version, frequently referred to as Yak-16-II, differed notably from its passenger counterpart by incorporating a UTK-1 ball turret mounting a 12.7 mm (0.50 in) Berezin UB machine gun positioned just behind the cockpit. Its cargo cabin floor was reinforced to handle heavier loads; additionally, it featured an enlarged vertical stabilizer and an extended fuselage length. This variant employed three-bladed V-511 propellers with scimitar-shaped blades capable of feathering. The Yak-16-II could accommodate seven paratroopers, ten fully equipped soldiers, or six stretchers alongside a medical attendant. Cargo loading was facilitated through a large clamshell door on the left side of the fuselage, which included an inset smaller door opening inward on its forward half. The aircraft could also carry three TsDMMM-120 supply containers mounted on racks beneath the wing’s center section and was equipped with a glider tow hook.[5]

Manufacturer trials for the Yak-16-II were completed in April 1948 before it proceeded to State acceptance testing shortly after. These evaluations uncovered several shortcomings that necessitated enlarging the horizontal tail surface and installing deicing equipment on the leading edges of both wings and tailplane. Upon re-submission, it received approval for production; nonetheless, it was ultimately not chosen because the Antonov An-2 offered greater versatility across both civil and military applications. Attempts to promote export sales in Eastern Europe failed due to lack of interest, partly because it had not been adopted by Aeroflot. The two prototypes continued to be utilized by the Yakovlev OKB and Factory No. 464—the facility responsible for their construction.[6]

Specifications (Yak-16-I)

Template:Aircraft specs

Notes

  1. ↑ Gordon, p. 239.
  2. ↑ Gordon, pp. 239–240
  3. ↑ Gordon, p. 240
  4. ↑ Gordon, pp. 240–41
  5. ↑ Gordon, p. 241
  6. ↑ Gordon, pp. 241–43

Bibliography

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External links

Template:Yakovlev aircraft Template:Aviation.ru

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