Yakovlev Yak-100

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

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.

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)

References

1 2 3 4 Gordon, Yefim; Dmitry; Sergey Komissarov (2005). OKB Yakovlev. Hinkley: Midland Publishing. pp. 351–352. ISBN 1-85780-203-9.

Yakovlev aircraft
Early aircraft	AVF-10 AVF-20 AVF-34 AIR-1 AIR-2 AIR-3 AIR-4 AIR-5 AIR-6 AIR-7 AIR-8 AIR-9 AIR-10 AIR-11 AIR-12 AIR-14 AIR-15 AIR-16 AIR-17 AIR-18 Ya-1 Ya-2 Ya-3 Ya-4 Ya-6 Ya-7 Ya-10 Ya-19 Ya-20 Ya-21 Ya-22 Ya-23
Fighters	Yak-1 Yak-3 Yak-7 Yak-9 Yak-15 Yak-17 Yak-23 Yak-25 (II) Yak-28 Yak-38
Bombers	Yak-2 Yak-4 Yak-28 Yak-35
Transports	Yak-6 Yak-10 Yak-12 Yak-14 Yak-18T Yak-40 Yak-42 Yak-58 Yak-112 Yak-242 (MC-21)
Reconnaissance	Yak-25 Yak-27 Pchela
Helicopters	Yak-24 Yak-100
Trainers	UT-1 UT-2 UT-3 UT-15 UT-21 UT-23 Yak-7 Yak-11 Yak-17 Yak-18 Yak-20 Yak-21 Yak-28 Yak-30 (II) Yak-32 Yak-50 (II) Yak-52 Yak-53 Yak-54 Yak-55 Yak-130 Yak-152 Yak-200 Yak-210
Experimental	EG Yak-5 Yak-8 Yak-13 Yak-16 Yak-19 Yak-25 (I) Yak-26 Yak-30 (I) Yak-36 Yak-41 Yak-43 Yak-44 Yak-45 Yak-46 Yak-50 (I) Yak-60 Yak-140 Yak-141 Yak-201 Yak-1000

Design and development

Specifications (Yak-100)

See also

References

Further reading