Sukhoi Su-7B

[PremiumFuelOnly 1,604]

Aircraft: Sukhoi Su-7B [NATO designation: “Fitter-A”]

 

Classification: fighter-bomber jet

 

Visuals: 

 

Spoiler

 

 

 

 

 

 

 

 

Description: While the preceding Su-7 was designed as a frontline fighter, the Soviet Air Force felt that a fighter-bomber role would be more apt for the aircraft, and so efforts to convert the type into a fighter-bomber were undertaken - an important role considering the emergence of Western fighter-bombers such as the F-100D and upcoming F-105 Thunderchief which had just begun testing by the late ‘50s.

 

Initially called the S-22, prototype Su-7Bs saw a significant increase in their empty weight (by 220 kg) due to internal reinforcement of the airframe and wings, so as a result had to make provisions for greater internal fuel capacity and a strengthened undercarriage to cope with the higher weight. In addition to integral structural changes, Su-7Bs were also fitted with upgraded avionics to better suit their mission profiles, and while the accuracy of their systems’ sights was not considered remarkable, it had a sufficient effectiveness for the time period.

 

As Su-7Bs were put into production, a continuous stream of modifications and improvements was made on the production line as new problems were discovered when the aircraft began to reach squadrons. Two of the major problems encountered were engine flameouts when firing unguided rockets, and ingesting foreign objects during taxi and landing due to the aircraft’s significant nose-down attitude on the ground. The first issue was addressed via the incorporation of the KS-1 system which virtually eliminated engine flameouts by reducing the engine’s RPM when the stick firing button was pressed, regardless of throttle position. The engine would automatically spool back up to its previous setting after a salvo had been fired, allowing for a full return to performance without the risk of engine flameout. Likewise, ingestion of foreign objects on the ground was eliminated by shortening the main landing gear of the aircraft by 113mm which presented the Su-7B in a slight nose-up attitude. 

 

By 1960, the Su-7B began to enter service with fighter-bomber regiments of the Soviet Air Force, and was officially accepted into service on January 24th, 1961. A total of 431 aircraft were built.

 

Fuel and Oil Data:

Internal Fuel Capacity: 3455 liters (912.7 gals) 

Oil Capacity: ? liters (? gallons)

Fuel Grade: Kerosene T-1 or TS-1 

Full Fuel Weight: 2760 kg (6080 lbs)

 

Engine Data:

Manufacturer: Lyul’ka

Designation: AL-7F-1

Type: axial-flow afterburning turbojet           

Combustion Chamber: annular

Compressor Stages: single-spool, 9-stage 

Turbine: 2-stage axial (HP)

 

Power Data:

Afterburner Power: 9200 kgf (20280 lbf) ? RPM 

Dry Max Power: 6800 kgf (14990 lbf) @ ? RPM

 

Dimensional Data: 

Length: 16.607 m (54.48 ft)

Height: 5.157 m (16.92 ft) 

Wing Span: 9.309 m (30.54 ft)  

Wing Area: 34.0 sq meters (365.97 sq. ft)

Wing Loading: 318.79 kg/sq.m (65.28 lbs/sq.ft) @ normal takeoff weight 

 

Weight Data:

Empty Weight: 7765 kg (17120 lbs)

Normal Takeoff Weight: 10839 kg (23889 lbs)

Maximum Takeoff Weight: 13043 kg (28747 lbs)

Landing Weight: 8622 kg (19003 lbs)

 

General Performance Data:

Maximum Speed (at 13000 m): 2120 kph (1317 mph)

Maximum Rate of Climb @ SL:  ? m/s (? ft/min)

Power-off, flaps-up Stall Speed: ? kph (? knots)

Unstick Speed: 360-370 kph (224-230 mph)

Landing Speed: 270-280 kph (168-174 mph)

Takeoff Distance @ SL: 1350 m (4430 ft)

Landing Run: 900 m (2950 ft) w/ brake parachute *or* 1200 m (3940 ft) w/o brake parachute

Service Ceiling: 19500 m (63960 ft) 

 

Structural Limits:

Operational G-limit: +8G

 

Maximum Speeds:

At SL: 1200 kph (745 mph)

At 13000 m: 2120 kph (1317 mph)

At 12000-13000m w. 4x FAB-250 bombs: 1625 kph (1009 mph) 

 

Time to Climb:

SL to 10K m (32810 ft): 4.3 min

 

Armament: 

Guns: 2x NR-30 30mm cannon (up to 160 rds total w/ 80 RPG, 65 RPG standard)

Maximum Warload Weight: 2000 kg (4410 lbs) w/ 500 kg limit per pylon

Additional Ordnance: (nuclear ordnance omitted)

• FAB-100 / OFAB-100 / ZAB-100 
• FAB-250 / OFAB-250
• FAB-500
• RBK-250 / RBK-500 cluster bombs filled with various submunitions
• RBS-100 bomb clusters consisting of AO-25-30 or AO-25-33 fragmentation bombs
• 64x 57mm S-5 unguided rockets carried in 4x UB-16-57U pods
• 28x 160mm S-3K unguided rockets 
• 2-4x 212mm S-21 unguided rockets
• 2-4x 240mm S-24 unguided rockets 

 

Avionics:

Radar: 

• SRD-5M Baza-6M gun ranging radar
• ASP-5NM/-5ND gunsight
• PBK-1 bombing sight
• ARK-10 ADF

Electronic Countermeasures Equipment: 

• Kremniy-2/-2M RHAWS
• Sirena-2 rear warning radar

 

Sources:

[1] Sukhoi Su-7/-17/-20/-22 Soviet Fighter and Fighter-Bomber Family by Yefim Gordon, Aerofax, Midland Publishing, 2004, ISBN: 1-85780-108-3

[2] Sukhoi Fitters in action by Hans-Heiri Stapfer, Aircraft Number 90, squadron/signal publications, 1989, ISBN: 0-89747-214-4

 

Edited March 29, 2020 by Aquilachrysaetos

[Miki_Hoshii 2,449]

Open for discussion.

[EpicBlitzkrieg87 8,350]

+1

[Z3r0_ 4,128]

Definitely support adding this, especially since we've started getting its contemporaries on other trees by now (most notably the A-4B).

[Milocat 4,857]

+1, this would be an awesome jet to see in the game and a perfect attacker to add to the Soviet tree.

[MonkeyBussiness 1,228]

+1

 

[Borotovas 4,500]

+1

[LeMemeAesthetic 266]

Do you have any information on the S-3K rocket? This is the first I've heard of them, and my quick google search is not yielding anything.

 

+1

[MonkeyBussiness 1,228]

12 hours ago, LeMemeAesthetic said:

Do you have any information on the S-3K rocket? This is the first I've heard of them, and my quick google search is not yielding anything.

 

+1

same

[PremiumFuelOnly 1,604]

13 hours ago, LeMemeAesthetic said:

Do you have any information on the S-3K rocket? This is the first I've heard of them, and my quick google search is not yielding anything.

 

+1

 

As most of my books focus on aircraft design/development over ordnance, I couldn't find much about the S-3K in them other than this:

 

 

Until I can find something more definitive and credible, this questionable website will have to do: https://www.armedconflicts.com/1057-3-1050-1050-1040-1056-1057-160-t101901

 

[Night_Trapper 1,649]

APU-14

 

http://www.lietadla.com/vyzbroj/s-3k.htm ... aka google translator .. 

 

[_Pixy 196]

+1

[m_a_r_v 27]

+1

[Z3r0_ 4,128]

Confirmed to be coming in Update 1.99.  It was on the dev server.

[leroyonly 4,311]

As the SU-7B has been added as per update 1.99 Starfighters,

 

Moved to Implemented Suggestions.