Yakovlev Ya-19

Role	Light transport
National origin	USSR
Manufacturer	OKB Yakovlev
Designer	Oleg K. Antonov
First flight	1939
Number built	1
Developed from	Yakovlev UT-3

The Yakovlev Ya-19, (aka S-19 or AIR-19), was a 5-seat light transport aircraft developed directly from the Yakovlev UT-3 during the late 1930s. The Ya-19 did not enter production, despite positive results from flight trials, due to the lack of development of the UT-3 and cancellation of the Voronezh MV-6 engine program, which were the result of changing priorities in the face of the Great Patriotic War.

Design and development

A derivative of the Yakovlev UT-3, the Ya-19was developed as a five-seat light transport by lead designer Oleg K. Antonov.

The Ya-19 mated the wings undercarriage, tail unit and engines of the UT-3 with a new fuselage seating five with a single pilot. Access to the cabin and cockpit was by a door on the port side adjacent to the trailing edge. Four passengers sat in the cabin, two a side and the fifth sat next to the right of the pilot in the cockpit.^[1]

In 1940 Aeroflot requested that the Ya-19 should be produced for use on short haul routes, but the increasing pace of rearmament in the Soviet Union meant that only a single prototype was built. Production was curtailed when the UT-3 failed to achieve large scale production.^[1]

An ambulance version capable of carrying two stretchers, one walking wounded and a medical assistant was proposed to the VVS. A mock-up review commission approved the design but production relied on continued development of the UT-3 and Ya-19, which was curtailed due to war requirements.^[1]

Use of the AIR-19 designation would have been very brief, if used at all, as AIR was dropped as a designation when A.I. Rykov was purged in one of Stalin's pogroms.^[1]

Operational history

The sole prototype completed manufacturer's testing in October 1939 and was then passed to the NII GVF (Nauchno-Issledovatel'skiy Institut Grazdahnskovo Vozdooshnovo Flota - civil air fleet scientific test institute), for state acceptance trials which it passed with good results. Fate of the prototype is unknown.^[1]

Specifications (Ya-19)

Data from OKB Yakovlev,^[2] Yakovlev aircraft since 1924^[1]

General characteristics

Crew: 1 or 2
Capacity: 5 passengers
Length: 10.02 m (32 ft 10 in)
Wingspan: 15 m (49 ft 3 in)
Wing area: 33.42 m² (359.7 sq ft)
Empty weight: 2,134 kg (4,705 lb)
Max takeoff weight: 2,950 kg (6,504 lb)
Fuel capacity: 280 kg (620 lb) fuel, 26 kg (57 lb) oil
Powerplant: 2 × Voronezh MV-6 6-cylinder inverted in-line air-cooled piston engines, 160 kW (220 hp) each
Propellers: 2-bladed wooden fixed pitch propellers

Performance

Maximum speed: 271 km/h (168 mph, 146 kn) *Landing speed: 86 km/h (53 mph; 46 kn)
Cruise speed: 235 km/h (146 mph, 127 kn)
Range: 783 km (487 mi, 423 nmi)
Service ceiling: 5,600 m (18,400 ft)
Time to altitude: 1,000 m (3,300 ft) in 5.3 minutes, 3,000 m (9,800 ft) in 17 minutes
Take-off run: 410 m (1,350 ft)
Landing run: 365 m (1,198 ft)

References

^ ^a ^b ^c ^d ^e ^f Gordon, Yefim; Gunston, Bill (1997). Yakovlev aircraft since 1924 (1. publ. ed.). London: Putnam. pp. 42–45. ISBN 0851778720.
^ Gordon, Yefim; Dmitry; Sergey Komissarov (2005). OKB Yakovlev. Hinkley: Midland Publishing. pp. 46–50. ISBN 1-85780-203-9.

[Yakputnam-1] ^ ^a ^b ^c ^d ^e ^f Gordon, Yefim; Gunston, Bill (1997). Yakovlev aircraft since 1924 (1. publ. ed.). London: Putnam. pp. 42–45. ISBN 0851778720.

[OKBYAK-2] Gordon, Yefim; Dmitry; Sergey Komissarov (2005). OKB Yakovlev. Hinkley: Midland Publishing. pp. 46–50. ISBN 1-85780-203-9.

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