Aviation of Word War II

Home Russian

Yak-9M

Fighter

Yakovlev

Yak-9M

The Yak-9M with the M-105PF2 engine with a power of 1240 hp was, finally, a better machine, because. it eliminated most of the design defects of the fighters of this family, repeatedly noted in the reclamation acts, protocols of the NKAP and the Air Force, and numerous defective statements. This machine was a kind of crowning achievement of the Yak-9 family of fighters with the M-105PF engine and was produced in the largest series of 4239 aircraft during the war from May 1944 to June 1945. This aircraft was the most archaic in design of the single-engine fighters produced in 1944 by the major countries of the world and the most massive of them. However, in the altitude range up to 1500 m, it demonstrated good aerobatic qualities and had a significantly greater survivability and operational life compared to its predecessors. The modification was made at plant number 153, which previously produced the Yak-9D and Yak-9T. The VK-105PF2 engine was installed on the Yak-9M from October 1944, and before that it was built with the usual VK-105PF, but from the very beginning of production it had a VISH-105 SV-01 propeller and a cockpit shifted 400 mm back.

Armament - similar to the Yak-9D, as well as the piloting technique; but the "emka" had the best anti-bonnet qualities. The fuel supply also remained the same. The main shortcomings of the Yak-9 concept were eliminated: the wing was strengthened (as a result, for the first time in two years of production, strength was brought to compliance with technical requirements), an emergency reset cockpit canopy was installed (it has been on the Bf-109 since 1939 on all modifications) and an automatic adjustment water temperature in the ART-1 engine cooling system (on Bf-109 - since 1940). A dust filter was also installed at the engine inlet, the mechanical recharging system was replaced by a pneumo-mechanical one. A number of minor improvements have been made: push-button control of the radio station, a shortened antenna, etc.

The lead vehicle was tested at the Air Force Research Institute from 17 to 27 December 1944, i.ะต. 10 months after the start of production of this modification. The name Yak-9M was assigned starting from No. 25-01, i.e. from the first aircraft of the 25 series.

The Yak-9PVO was a version of the Yak-9M, designed to guard the USSR airspace in the operational rear, and differed from the usual one by better instrumentation, a smaller supply of oil and fuel, and the absence of armor. This was done in order to improve the two main indicators for the interceptor - speed and rate of climb - and to intercept in difficult weather conditions. In addition to standard equipment, the Yak-9 air defense had an FS-155 headlight, a VR-2 variometer, an RPK-10M radio semi-compass, an RSI-4M multi-channel radio station with an RSI-6 MTs receiver and an RSI-ZM-1 transmitter, a "friend or foe" transponder MF -3 and a light signaling the position of the landing gear (in addition to two green lamps on the instrument panel, two red lamps were lit).

From the 25th to the 43rd series, a total of 4239 aircraft were produced.



Yak-9 Modifications
Yak-9P Yak-9M Yak-9U Yak-9P
Year of issue 1944 1944 1944 1947
Dimensions
Length, m 8.5 8.5 8.55 8.55
Wing span, m 9.74 9.74 9.74 9.74
Wing area, m² 17.15 17.15 17.15 17.15
Wing loading, kg/m² 196 181 187 207
Weight, kg:
Empty weight 2382 2428 2512 2708
Maximum takeoff weight 3356 3096 3204 3550
Powerplant
Engine VK-105PF VK-105PF VK-107A VK-107A
Power, hp 1180 1180 1500 1500
Power loading, kg/hp 2.84 2.62 2.14 2.37
Performance
Max speed, km/h at sea level 507 518 575 590
at altitude 562 573 572 550
m 3750 3750 5000 5000
Time to 5000 m, min 6.5 6.1 5.0 5.8
Time of turn, sec 25-26 19-20 20 21
Service ceiling, m 8600 9500 10650 10500
Service range, km 880 950 675 1130
Armament
Cannon, 20-mm 1 1 1 5
Machine guns, 12.7-mm 1 1 2 -
Photo Description
Drawing Yak-9M Drawing Yak-9M
The Yak-9M side view The Yak-9M side view. The aircraft has longer rear canopy fairing, leant aerial mast, small radiostation access hatch and four joint engine cowling. Rowndish oil cooler FWD edge is seen quite good. Water cooler AFT edge is slightly beyond split flaps one. Super charger intake cap is absent or it is fixed in fully opened position. The stars are in white-red edge. All the features of Yak-9 25th batch are present here.

Bibliography

  • "Yak-9: Private soldiers of heavens" /Dmitriy Leipnik/
  • "The history of designs of planes in USSR 1938-1950" /Vadim Shavrov/
  • "Planes of Stalin falcons" /Konstantin Kosminkov and Dmitriy Grinyuk/
  • "Stories of the aircraft designer" /Alexander Yakovlev/
  • "The Soviet planes" /Alexander Yakovlev/