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Sukhoi Su-7 (Fitter-A) Fighter-Bomber / Ground Attack (1959)

Authored By Staff Writer | Last Updated: 9/14/2013

The Sukhoi Su-7 Fitter-A was produced in nearly 1,850 examples with over a quarter of these made available for export.

The Sukhoi Su-7 (NATO codename of "Fitter-A") was a single-seat, single engine jet-powered fighter in service with the Soviet Air Force (Frontal Aviation) throughout the 1960s. It was a nuclear-capable aircraft that went on to be a successful ground-attack fighter (noted for its ability to withstand large amounts of combat damage and still fly), seeing extensive combat actions particularly in the Middle East and in Southern Asia. The type was delivered to Warsaw Pact nations as well as trusted Third World allies and, today, few are in service with any air force. Despite its speed, bombing accuracy and battlefield robustness, the Su-7's powerplant proved exceedingly thirsty, limiting its tactical usefulness to its meager combat radius of several hundred miles. The aircraft went on to be produced in at least ten known major variants that also included a two-seat trainer and appeared in approximately 1,847 total production examples from 1957 to 1972.

Development

The Su-7 began life as early as 1953 (the final year of the Korean War), to which the Sukhoi OKB firm was reestablished and charged with finding an answer to the North American F-86 Sabre jet fighter. The American jet effectively "stole" the Korean War away from the North Korean/Chinese/Soviet conglomerate, matching wits with the highly-prized Soviet-made Mikoyan-Gurevich MiG-15 "Fagot" single-seat, single engine, swept-wing jet fighter.

A Sukhoi swept-wing design soon emerged as the S-1 "Strela", a prototype revealed by the mid-1950's and fitted with a new Lyulka AL-7 series turbojet engine within a long and slender aerodynamic fuselage. The aircraft featured an open nose assembly for which to feed the engine and air intake was controlled through a variable-position nose cone mounted within the intake itself. First flight was on September 7th, 1955 and further tests allowed the fighter to set an internal Soviet speed record of over Mach 2. Since the S-1 would be called upon in the air-to-air combat role, close-in armament was key to its success and ultimate survival. Sukhoi called on an intended battery of 3 x 37mm Nudelman N-37 series cannons as well as a retractable under-fuselage tray housing up to 32 x 57mm unguided rockets (the Americans fielded similar fighters armed as such, though complimented by machine guns instead of cannon). The S-1 was unveiled to Western eyes in the 1956 Soviet Aviation Day presentation at Tushino Airport near Moscow.

The S-2 prototype soon appeared though this time showcasing a new "slab" tailplane assembly and general external refinements over the S-1. The S-1 was later fatally lost (its test pilot killed) in an accident on November 23rd, 1956. Regardless, the program proceeded and ultimately produced the base Su-7 production-level fighter in 1959.

Like most other early and middle Cold War-era jet fighters, the Su-7 was envisioned in a dedicated ground-attack variant. The S-22 pre-production model was developed for this purpose - based on the S-2 prototype - and brought with it an area-ruled fuselage as well as other refinements. The S-22 was designed in such a way as to take advantage of the aircraft's inherent speed while taking into account the low-level bombing role it would be utilized in. First flight occurred in March of 1959 and, before long, the type emerged as the Su-7B production model in 1961.

In typical NATO fashion, the non-flattering codename of "Fitter" was attached to the Soviet aircraft line. NATO maintained a "healthy" habit of assigning Soviet fighters with "F" based names (MiG-17 "Fresco") while bombers were given "B" names (Tu-85 "Bear").

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Specifications for the
Sukhoi Su-7 (Fitter-A)
Fighter-Bomber / Ground Attack


Focus Model: Sukhoi Su-7BKL (Fitter-A)
Country of Origin: Soviet Union
Manufacturer: Sukhoi - Soviet Union
Initial Year of Service: 1959
Production: 1,847


Crew: 1


Length: 55.12ft (16.8m)
Width: 30.54ft (9.31m)
Height: 16.37ft (4.99m)
Weight (Empty): 18,365lbs (8,330kg)
Weight (MTOW): 33,532lbs (15,210kg)


Powerplant: 1 x Lyulka AL-7F-1 turbojet engine generating 22,150lbf of thrust with afterburning; 2 x SPRD-110 JATO lift rockets generating 13,300lbf.


Maximum Speed: 715mph (1,150kmh; 621kts)
Maximum Range: 1,025miles (1,650km)
Service Ceiling: 57,743ft (17,600m; 10.9miles)
Rate-of-Climb: 31,500 feet per minute (9,601m/min)


Hardpoints: 6
Armament Suite:
STANDARD:
2 x 30mm Nudelman-Rikhter NR-30 cannons

OPTIONAL:
Mission-specific armaments included a combination of the following across six external hardpoints (2 usually reserved for fuel tanks):

Conventional Drop Bombs
UB-16-57U 57mm Rocket Pods
Gun Pods
R-13M air-to-air missiles
R-60 air-to-air missiles
R-73A air-to-air missiles
Kh-25ML air-to-surface missiles
Kh-27 air-to-surface missiles
Kh-29 air-to-surface missiles
Kh-58 air-to-surface missiles
8U69 5-kiloton nuclear bomb
2 x 160 gallon fuel tanks


Variants:
S-1 - Prototype Model Designation


S-2 - Prototype Model Designation with redesigned slab tailplane; becoming the Su-7 air superiority production model.

S-22 - Preproduction Derivative Model of the S-2 fitted with Lyulka AL-7F turbojet capable of 19,814 lbs of thrust; becoming the ground attack production model.

Su-7 (Fitter-A) - Initial Production Model Designation; tactical air superiority version; produced from 1957 until 1960; 132 examples produced.

Su-7BM - Fitting an upgraded Lyulka AL-7F-1 turbojet engine; revised aerodynamics; wing fuel tanks; provision for underwing external fuel tanks for increased range; nuclear-capable; production from 1963 to 1965.

Su-7BKL / S-22KL - Fitted with 2 x SPRD-110 JATO lift rockets of 13,300lbf; skids added to main landing gear for improved field operations; brake parachutes for short-landings; production from 1965 to 1972.

Su-7BMK - Export Model of the Su-7BM production version; produced from 1967 to 1971.

Su-7U (Moujik) - Two-seat tandem trainer model; deletion of internal fuel tank; produced from 1966 to 1972.

Su-7UMK - Export version of the Su-7U two-seat trainer.

Su-7UM - Two-Seat Trainer version of the Su-7BM production model.

Su-7IG - Proposed Variable Geometry Wing model (swing-wing); becoming the Su-17 "Fitter" production model line; fitting improved AL-7F-1 turbojet engine of 24,691lbs thrust.

100LDU "Control Configured Vehicle" (CCV) - Modified Su-7U trainer model fitted with canards; fly-by-wire testing platform.


Operators:
Afghanistan; Algeria; Bangladesh; Czechoslovakia; Hungary; Egypt; India; Iraq; North Korea; North Vietnam; Poland; Soviet Union; South Yemen; Syria; Vietnam