avia.wikisort.org - Helicopter

The Yakovlev Yak-100 was a single-engine, transport helicopter developed in the USSR in 1948. This was the Yakovlev Design Bureau's second helicopter.

Yak-100
Role	Transport helicopter Type of aircraft
Designer	Yakovlev
First flight	November 1948
Status	Project cancelled
Produced	Moscow Plant No. 115
Number built	2

Design and development

The Yak-100 (initially designated Yak-22) was developed in direct competition with Mikhail Mil's Mi-1. Bearing a striking resemblance to the Sikorsky H-5, the Yak-100 had a conventional main and anti-torque rotor configuration, driven by an Ivchenko AI-26GRFL radial piston engine. The pilot and crewman/passenger sat under a long greenhouse-style canopy, with very good visibility.[1]

Flight trials progressed quickly, with the almost ubiquitous vibration being tackled by moving the centre of gravity of the main rotor blades behind their flexural axes. Manufacturer's trials were completed in June 1950, with successful State acceptance trials following later that year.[1]

Although successful in trials, the Yak-100 was not put into production because the equally successful Mi-1 had already been prepared for production before the Yak-100 had completed acceptance trials. The second prototype had three seats as well as other minor improvements.[1]

Specifications (Yak-100)

Data from OKB Yakovlev[1]

General characteristics

• Crew: 2
• Capacity: + 3rd seat in second prototype
• Length: 13.91 m (45 ft 8 in)
• Empty weight: 1,690 kg (3,726 lb) first prototype; 1,805 kg (3,979 lb) second prototype
• Max takeoff weight: 2,090 kg (4,608 lb) first prototype; 2,180 kg (4,810 lb) second prototype
• Powerplant: 1 × Ivchenko AI-26GRFL , 313 kW (420 hp)
• Main rotor diameter: 14.5 m (47 ft 7 in)

Performance

• Maximum speed: 170 km/h (110 mph, 92 kn)
• Range: 325 km (202 mi, 175 nmi)
• Service ceiling: 5,250 m (17,220 ft) *Hovering ceiling: 2,720 m (8,920 ft)

See also

Aircraft of comparable role, configuration, and era

• Sikorsky H-5
• Bristol Sycamore
• Weir W.9
• Bell 48

References

Further reading

• Gordon, Yefim; Gunston, Bill (1997). Yakovlev aircraft since 1924 (1st ed.). London: Putnam. p. 126. ISBN 0851778720.

На других языках

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[de] Jakowlew Jak-100

Der Jakowlew Jak-100 (russisch Яковлев Як-100) war ein sowjetischer Hubschrauber, der zugunsten des Mi-1 nicht in die Serienproduktion überführt wurde.

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- [en] Yakovlev Yak-100

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[it] Yakovlev Yak-100

Lo Yakovlev Yak-100 (in cirillico Яковлев Як-100) fu un elicottero leggero utility, bimotore con rotore tripala, progettato dall'OKB 115 diretto da Aleksandr Sergeevič Jakovlev, sviluppato in Unione Sovietica nei tardi anni quaranta e rimasto allo stadio di prototipo.

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[ru] Як-100

Як-100 — советский опытный транспортный вертолёт одновинтовой схемы с рулевым винтом, построенный в 1948 году. Серийно не строился, так как проходивший испытания в это же время вертолёт Ми-1 показал более высокие характеристики[какие?]. Общая компоновка и внешний вид вертолёта схожи с Sikorsky R-5. Также известен под первоначальным обозначением Як-22.

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