At about this time the chief designer of aircraft engines by V. Y. Klimov has finished work on his new engine VK-107A. This engine is developing takeoff power 1650 HP vs 1250 HP M-105PF with little weight gain and almost the same dimensions. Installation VK-107A on “Yak” gave a significant increase flight speed: up to 720 km/h the Yak-3 and 700 km/h on the Yak-9U. On “yaks” and the latest aircraft the Lavochkin La-7, equipped with this engine, ended the war Soviet pilots.
The Yak-9 was the most popular fighter of the great Patriotic war. In all there were over 16,700 instances of different versions of this legendary car.
The design of the aircraft
The fuselage is a welded truss of steel tubes, covered with duralumin sheet in the front and cloth in the rear. Large removable panels on both sides provide good accessibility to the internal equipment.
The lantern of the cockpit is typical of the “Yak” design, with sliding middle part and faceted front visor.
Wing – all-in-one, dahlonga of electronic circuits. Wing profile Clark UNIVERSITY of 15% at the root and 8% at the end of the wing.
The ailerons were metal frame and fabric covering. The bottom in the middle of the wing at shompolnye loop was suspended from a landing flap.
The empennage is a cantilever, all-metal. Elevators and turning, with fabric covering.
The power plant consisted of a V-type engine liquid-cooled M-105PF power 1250 HP with variable-pitch propeller VISH-61P or VISH-105. The management of the engine and propeller were carried out from the cockpit using a rope pull into a tubular sheath.
Brief technical characteristics of the main modifications of the Yak-9
Fuel was placed in tested gasoline tanks, installed in the root of the wing between the spars. To prevent fire or explosion tanks used cooled exhaust gases from the engine, which filled the liberated from the fuel space (in different variants of the aircraft the number and capacity of fuel tanks was different).
Radiator oil cooling was located initially in the forward fuselage under the engine on later models is at the root of the wing. At the bottom under the fuselage behind the rear edge of the wing was vodoradiatora to cool the motor.
Chassis – retractable, tailwheel. The main stand was along the wingspan to the fuselage, the skid was removed back on the flight.
Housekeeping system-landing gear, landing flaps and wheel brakes worked from compressed air. There was a alarm system.
The equipment of the Yak-9 was the minimum required for front-line fighter. The instrument panel was mounted on shock absorbers. The rest of the cabin equipment on the side and side panels. On the starboard side, above the console, was the oxygen device. For communication in the air served as a VHF transmitter / receiver radio station of the RSI-4.
Weapons and book of the planes in the release process was significantly changed. In different variants of the Yak-9 was mounted aircraft cannon caliber 20, 23, 37, 45 and 57 mm UB machine guns of 12.7 mm. As noted above, was a unique variant of the Yak-9B fighter-bomber with an internal suspension of bombs.
Back seat, front and rear armored glass protected the pilot from bullets and shrapnel.
A typical painting of the Yak-9-olive-green, with dark green or brown stains, camouflage on top and light blue bottom. For aircraft of various aviatiei was applied to different kind of digital symbols, insignia and badges of the guards; practiced painting spinner is red. Stars – red with red-white piping.