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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.

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

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

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