"Sukhoi Su-7 (1944)" redirects here. For the Cold War supersonic fighter-bomber, see Sukhoi Su-7.
For the electric vehicle with a similar name, see Xiaomi Su7.
The Sukhoi Su-6 was a Sovietground-attack aircraft developed during World War II. The mixed-power (rocket and piston engines) high-altitude interceptor Su-7 was based on the single-seat Su-6 prototype.
Su-6
Su-6(S2A) second prototype, two-seater with M-71 engine
Development of the Su-6 began in 1939, when the Sukhoi design bureau began work on a single-seat armoured ground-attack aircraft. An order for two prototypes was placed on 4 March 1940, and on 1 March 1941 flight testing of the first prototype was begun by test pilot A.I. Kokin.[1]
The flight tests indicated that the Su-6 was superior to the Ilyushin Il-2 in nearly all performance categories, however its engine exceeded its age limit before testing could be completed, and no further Shvetsov M-71 engines were available.[1]
The second prototype flew only in January 1942 because the OKB had to be evacuated after the start of the Great Patriotic War.[2] It was armed with two 23 mm cannon, four machine guns and ten rails for aerial rockets. Test results were very favorable, and the AFRA Scientific Research Institute recommended the acquisition of a small production batch for testing under front-line conditions. A draft resolution for the production of 25 aircraft was prepared, however unfortunately for Sukhoi, it was never officially issued.[1]
Meanwhile, combat experience with single-seat Il-2s demonstrated the need for a rear gunner. The third prototype was therefore designed with the second crewman at the expense of bomb load (decreased from 400 kg/881 lb to 200 kg/440 lb), and was fitted with a more powerful M-71F engine. Official tests revealed that the two-seat Su-6 had a 100 km/h (54 kn, 62 mph) greater top speed than the Il-2, although with a considerably smaller payload.[2] When the troublesome M-71 was canceled, Sukhoi was directed to utilize the liquid-cooled Mikulin AM-42 engine. When flight tests began on 22 February 1944, the re-engined Su-6 proved inferior to the Ilyushin Il-10 using the same engine thanks to the additional 250 kg (551 lb) of armor required to protect the liquid-cooled engine and the lower power output of the AM-42 compared with M-71F.[2]
Although the Su-6 never entered production, in 1943 Pavel Sukhoi was awarded the Stalin Prize of the 1st Degree for the development of the aircraft.[1]
Su-7edit
As an experiment, the basic single-seat Su-6 design was converted into a mixed-power high-altitude interceptor named Su-7 (the name was reused in the 1950s for a supersonic fighter-bomber). The armor was removed and the fuselage was of all-metal construction. Power came from a Shvetsov ASh-82FN piston engine with two TK-3 turbochargers in the nose and a Glushko RD-1-KhZ rocket engine in the tail. The piston engine produced 1,380 kW (1,850 hp), while the rocket engine utilized kerosene and nitric acid for fuel and generated 2.9 kN (600 lbf) of thrust for up to 4 minutes.[2] Armament consisted of three 20 mm ShVAK cannon with 370 rounds of ammunition. The sole Su-7 was completed in 1944. Test flights demonstrated a top speed of 510 km/h (275 kn, 315 mph) at 12,000 m (39,370 ft) without the rocket motor, and 705 km/h (380 kn, 440 mph) with the rocket.[2] In 1945, the rocket motor exploded during flight testing, killing the pilot and destroying the aircraft.[3]
The Su-6 fitted with a second cockpit with a rear-firing 12.7 mm (0.50 in)Berezin UBT machine gun. Testing revealed better performance and armour than the Il-2, but despite recommendations, production was not carried out due to the M-71 engine not entering production.
^ abcde. Sukhoi Company Museum. Archived from the original on 2007-04-30. Retrieved 2007-01-07.
^ abcdefShavrov V.B. (1994). Istoriia konstruktskii samoletov v SSSR, 1938-1950 gg. (3 izd.). Mashinostroenie. ISBN5-217-00477-0.
^Green, W; Swanborough, G (2001). The great book of fighters. MBI Publishing. ISBN0-7603-1194-3.
^ abcdeAntonov, Vladimir; Gordon, Yefim; Gordyukov, Nikolai; Yakovlev, Vladimir; Zenkin, Vyacheslav; Carruth, Lenox; Miller, Jay (1996). OKB Sukhoi : a history of the design bureau and its aircraft (1st ed.). Earl Shilton: Midland Publishing. pp. 60–65. ISBN9781857800128.
^Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.
January 01, 1970
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Sukhoi Su 7 1944 redirects here For the Cold War supersonic fighter bomber see Sukhoi Su 7 For the electric vehicle with a similar name see Xiaomi Su7 The Sukhoi Su 6 was a Soviet ground attack aircraft developed during World War II The mixed power rocket and piston engines high altitude interceptor Su 7 was based on the single seat Su 6 prototype Su 6 Su 6 S2A second prototype two seater with M 71 engine Role Ground attack aircraft National origin Soviet Union Manufacturer Sukhoi First flight 1 March 1941 Status Prototype Primary user Soviet Air Forces Number built 3 Contents 1 Design and development 1 1 Su 7 2 Variants 3 Operators 4 Specifications Su 6 SA 2nd prototype 5 See also 6 ReferencesDesign and development editDevelopment of the Su 6 began in 1939 when the Sukhoi design bureau began work on a single seat armoured ground attack aircraft An order for two prototypes was placed on 4 March 1940 and on 1 March 1941 flight testing of the first prototype was begun by test pilot A I Kokin 1 The flight tests indicated that the Su 6 was superior to the Ilyushin Il 2 in nearly all performance categories however its engine exceeded its age limit before testing could be completed and no further Shvetsov M 71 engines were available 1 The second prototype flew only in January 1942 because the OKB had to be evacuated after the start of the Great Patriotic War 2 It was armed with two 23 mm cannon four machine guns and ten rails for aerial rockets Test results were very favorable and the AFRA Scientific Research Institute recommended the acquisition of a small production batch for testing under front line conditions A draft resolution for the production of 25 aircraft was prepared however unfortunately for Sukhoi it was never officially issued 1 Meanwhile combat experience with single seat Il 2s demonstrated the need for a rear gunner The third prototype was therefore designed with the second crewman at the expense of bomb load decreased from 400 kg 881 lb to 200 kg 440 lb and was fitted with a more powerful M 71F engine Official tests revealed that the two seat Su 6 had a 100 km h 54 kn 62 mph greater top speed than the Il 2 although with a considerably smaller payload 2 When the troublesome M 71 was canceled Sukhoi was directed to utilize the liquid cooled Mikulin AM 42 engine When flight tests began on 22 February 1944 the re engined Su 6 proved inferior to the Ilyushin Il 10 using the same engine thanks to the additional 250 kg 551 lb of armor required to protect the liquid cooled engine and the lower power output of the AM 42 compared with M 71F 2 Although the Su 6 never entered production in 1943 Pavel Sukhoi was awarded the Stalin Prize of the 1st Degree for the development of the aircraft 1 Su 7 edit As an experiment the basic single seat Su 6 design was converted into a mixed power high altitude interceptor named Su 7 the name was reused in the 1950s for a supersonic fighter bomber The armor was removed and the fuselage was of all metal construction Power came from a Shvetsov ASh 82FN piston engine with two TK 3 turbochargers in the nose and a Glushko RD 1 KhZ rocket engine in the tail The piston engine produced 1 380 kW 1 850 hp while the rocket engine utilized kerosene and nitric acid for fuel and generated 2 9 kN 600 lbf of thrust for up to 4 minutes 2 Armament consisted of three 20 mm ShVAK cannon with 370 rounds of ammunition The sole Su 7 was completed in 1944 Test flights demonstrated a top speed of 510 km h 275 kn 315 mph at 12 000 m 39 370 ft without the rocket motor and 705 km h 380 kn 440 mph with the rocket 2 In 1945 the rocket motor exploded during flight testing killing the pilot and destroying the aircraft 3 Variants editA 4 The initial design for the Su 6 S 4 The second prototype with various modifications SA modified 4 The SA with 2 x OKB 16 37 mm 1 46 in Cannon and 2x 7 62 mm 0 30 in ShKAS machine guns S2A 4 The Su 6 fitted with a second cockpit with a rear firing 12 7 mm 0 50 in Berezin UBT machine gun Testing revealed better performance and armour than the Il 2 but despite recommendations production was not carried out due to the M 71 engine not entering production Operators edit nbsp Soviet Union Soviet Air ForceSpecifications Su 6 SA 2nd prototype editData from OKB Sukhoi 4 1 2 General characteristicsCrew 1 Length 9 243 m 30 ft 4 in Wingspan 13 58 m 44 ft 7 in Height 3 89 m 12 ft 9 in S2A Wing area 26 m2 280 sq ft Airfoil root TsAGI B 18 tip TsAGI B 8 5 Empty weight 3 727 kg 8 217 lb SA S2A 4 000 kg 8 800 lb dd dd Gross weight 5 534 kg 12 200 lb S2A Fuel capacity 480 kg 1 060 lb Powerplant 1 Shvetsov M 71 18 cylinder two row air cooled radial piston engine 1 500 kW 2 000 hp S2A 1x 1 600 kW 2 200 hp Shvetsov M 71F dd dd Propellers 4 bladed AV 54A 3 25 m 10 ft 8 in diameter constant speed propeller Performance Maximum speed 496 km h 308 mph 268 kn at sea level with 10x RS 132 rockets 510 km h 320 mph 280 kn at sea level without warload 491 km h 305 mph 265 kn at 2 500 m 8 200 ft with bombs 527 km h 327 mph 285 kn at 2 500 m 8 200 ft without bombs S2A 514 km h 319 mph 278 kn at 3 800 m 12 500 ft dd dd dd Landing speed 136 km h 85 mph 73 kn Take off speed 160 km h 99 mph 86 kn Range 450 km 280 mi 240 nmi Ferry range 576 km 358 mi 311 nmi S2A 973 km 605 mi 525 nmi dd dd Service ceiling 8 100 m 26 600 ft S2A Time to altitude S2A 1 555 m 5 102 ft in 10 minutes 36 seconds Take off run 520 m 1 710 ft Take off roll S2A 410 m 1 350 ft Landing roll S2A 730 m 2 400 ft Armament Guns 2 37 mm 1 46 in Nudelman Suranov NS 37 autocannon in the wings 90 rounds per gun 180 rounds total 2 7 62 mm 0 30 in ShKAS machine guns in the wings 1 400 rounds per gun 2 800 rounds total 1 12 7 mm 0 50 in Berezin UBT machine gun in rear turret with 196 rounds Rockets 10x RS 132 rockets Bombs Up to 400 kg 880 lb of bombsSee also editAircraft of comparable role configuration and era Ilyushin Il 2 Ilyushin Il 10 Related lists List of military aircraft of the Soviet Union and the CISReferences edit a b c d e Sukhoi Su 6 Sukhoi Company Museum Archived from the original on 2007 04 30 Retrieved 2007 01 07 a b c d e f Shavrov V B 1994 Istoriia konstruktskii samoletov v SSSR 1938 1950 gg 3 izd Mashinostroenie ISBN 5 217 00477 0 Green W Swanborough G 2001 The great book of fighters MBI Publishing ISBN 0 7603 1194 3 a b c d e Antonov Vladimir Gordon Yefim Gordyukov Nikolai Yakovlev Vladimir Zenkin Vyacheslav Carruth Lenox Miller Jay 1996 OKB Sukhoi a history of the design bureau and its aircraft 1st ed Earl Shilton Midland Publishing pp 60 65 ISBN 9781857800128 Lednicer David The Incomplete Guide to Airfoil Usage m selig ae illinois edu Retrieved 16 April 2019 Retrieved from https en wikipedia org w index php title Sukhoi Su 6 amp oldid 1193974784 Su 7, wikipedia, wiki, book, books, library,
