EDO SA. Lavochkin end 1943 g. It has done a lot of work to further improve the flight data of his fighter La-5FN. Significant improvement of the flight data of the aircraft has been achieved by working together with TsAGI its aerodynamics. The aircraft features full encapsulation of the engine bonnet, minor recomposition wing center section, changes in masloohlazhdeniya and exhaust systems, etc.. Oil cooler has been moved under the fuselage, and a suction air for cooling the oil - in the center-sock.
Fighter La-7 – video
Racks main chassis were shortened to 80 mm. All of these changes were the basis of TsAGI recommendations for the second round of improvements to the aircraft La-5 (recommendations of the first round have been implemented to create La-5FN). testing machine, became virtually flying laboratory, LII began in late 1943 g. The tests did not last long, in February 1944 g. car crashed. Test pilot NV. Adamovich had to leave the burning plane on a parachute. 1 February 1944 g. Test Pilot GM. Shiyanov raised in the air advanced fighter La-5 "Standards 1944 Mr. ", which is characterized by installing a screw with a special profile blades TSAGI B-4, rotating at transonic. Events, carried out in accordance with the recommendations TSAGI, helped to reduce the weight of an empty car on 71 kg, and alignment has moved back, reducing the margin of longitudinal stability. In February 1944 g. "Reference 1944 g "was tested in NII VVS. The maximum speed at altitude was obtained during these tests, 680 kmh, What's on 34 km / h more, than an experienced La-5FN. In January 1944 g. new fighter had already been made at the production plant, and soon received the designation La-7.
Overall, La 7 has an obvious advantage to the La-5FN, and began to build commercially in several plants. Armament La-7 was significantly more powerful - three new guns B-20 instead of the two guns ShVAK on La-5. true, in connection with nedovedennostyu guns B-20 adopted the first production of La-7 remained the same, as well as at La-5FN.
Admission La-7 aircraft parts began in the middle 1944 g. and went on increasing pace. From the beginning of production until the surrender of Germany got air units 4359 these fighters. At the beginning of mass production could not provide the required quality of production of the new fighter, require more careful manufacture, than La-5. This often resulted in a significant reduction in rate of La 7. loss of speed on some newly released aircraft plants reached 40 kmh. It had to issue special recommendations for improving the quality of manufacturing. Carried out military tests on the Baltic front showed the advantage of the La-7 in a dogfight. For a month the regiment shot down 55 enemy aircraft, having lost four of their. On the La-7 ace illustrious I.N. Kozhedub sbyl 17 enemy aircraft, including jet Me-262.
In August 1944 g. Test prototype came out of La-7 with the engine AL-83. With this engine airplane for the first time exceeded the 700-kilometer line speed. Then the prototype "120" was created with the DB-83, which had an improved design with a broader application of metal. It first laminar wing has been established in the USSR. In July 1945 g. speed has been reached on it 725 kmh, What's on 24 km / h more, than La-7 with AL-83. In March 1945 g. factory number 21 It was created by double training fighter La 7UTI without bulletproof glass and bronespinki. On the basis of the La-7 was created a few prototypes with additional rocket engines. Total produced 5905 aircraft La-7.
The performance characteristics of the La-7
– chief designer: FROM. A. Lavochkin
– First flight: November 1943 of the year
– Getting Started: Spring 1944 of the year
– End of operation: end 1947 of the year, 1950 year (Czechoslovakia)
– years of production: Spring 1944 — 1946 years
– units produced: 5 905
The crew of La 7
– 1 human
Dimensions La 7
– Wingspan, m: 9.80
– Length, m: 8.67
– Height, m: 2.54
– wing area, m2: 17.59
Weight La 7
– empty weight: 2605 kg
– Take-off weight: 3265 kg
La-7 engine
– 1 AP Shvetsova ASH-82FN
– Power, hp: 1 x 1850
The rate of La 7
– Maximum speed at ground: 597 kmh
– Maximum speed at height: 680 kmh
– The maximum rate of climb: 1111 m / min
Range La-7 flight
– 635 km
Practical ceiling La 7
– 10750 m
Armament La 7
– three 20-mm UX-gun 20 or two 20-mm cannon ShVAK
– to 200 kg bombs
Photo La-7
