Yakovlev Yak-100

Yakovlev Yak-100
Three-sided view of the Jak-100
Type:	Experimental helicopter
Design country:	Soviet Union
Manufacturer:	OKB Yakovlev
First flight:	July 1949
Commissioning:	-
Production time:	1948
Number of pieces:	2

The Jakowlew Jak-100 ( Russian Яковлев Як-100 ) was a Soviet helicopter that was not put into series production in favor of the Mi-1 .

development

Alexander Jakowlew apparently based his helicopter design, second after the EC, on the US S-51 from Sikorsky. The first prototype was completed in November 1948 and made its maiden flight in July of the following year. The following test, which lasted about a year, showed acceptable flight performance, in particular with regard to the vertical rate of climb and the fuel consumption of 65 kg / h in the stationary state. There were also no vibrations transmitted to the cell by the rotor, the so-called “shaking”, which was not uncommon in helicopter designs at that time. During the tests, some changes were made to the model, in particular the engine cooling and the increase in the tank volume to 240 l. The cabin glazing has also been changed slightly. Despite the acceptable values, no series production was ordered; instead, the decision was made in favor of the Mi-1. The fact that this came from a construction office specializing in helicopter constructions , while helicopter construction at OKB Jakowlew was more of a marginal phenomenon, played a not insignificant role.

construction

The cell of the Jak-100 was largely made of duralumin . The tail rotor was on the left side of a boom, the main rotor, made entirely of wood, behind the cabin above the fuselage. Entry was via two sliding doors on both sides. The single-wheel tricycle landing gear was rigid.

Technical specifications

Parameter	Data
Crew / passengers	1/2
Rotor circle diameter	Main rotor 14.50 m, tail rotor 2.60 m
length	13.91 m
height	2.25 m
Empty mass	1690 kg
Takeoff mass	2090 kg
drive	a seven -cylinder engine AI-26GRFL with a three-bladed wooden rotor
power	423 kW (575 hp)
Top speed	170 km / h
Rate of climb	8.2 min at 2000 m altitude
Summit height	2720 ​​m
Range	325 km

literature

• Wilfried Bergholz: Jakowlew since 1927 . Motorbuch, Stuttgart 2017, ISBN 978-3-613-04024-3 , p. 98/99 .
• Wilfried Bergholz: Russia's great aircraft manufacturer . Jakowlew, Mikojan / Gurewitsch, Suchoj. Aviatic, Oberhaching 2002, ISBN 3-925505-73-3 , p. 66 .

Web links

Commons : Jakowlew Jak-100  - Collection of pictures, videos and audio files

• Яковлев Як-100. Retrieved February 24, 2018 (Russian, dates and photos).