40 years in the air — Su-25 Frogfoot – 1st flight on February 22 1975.

On 22nd February is anniversary of the 1st flight, of one of the most used ground attacker in the world. It will be 40 years of the 1st flight, of legend Su-25 Frogfoot.

13269165223662

Russian AF Su-25

 

Su-25 was in service in many countries around the world, and still in use. Su-25 survived some modernizations during his long time usage.

Used in many wars and conflicts, OKB Suhogo used Su-25 war experience to make him better, stronger to survive any bad situation.

Frogfoot is very tough jet, with two separated engines, subsonic, with possibility to carry tons of bombs and rockets, and have possibility to fly with only one engine.

 

 

SU-25__001

Bulgarian AF Frogfoot

 

More than 1000 units are produced and used in Angola, Chad, Congo, Equatorial Guinea, Ethiopia, Gambia, Iran, Iraq, Ivory Coast, Former Yugoslav Republic of Macedonia, Peru, Sudan, Turkmenistan, Uzbekistan,Ukraine, Slovakia, Kazakhstan, Gambia, Georgia, Czech Republic, Bulgaria, Belarus, Azerbaijan, Armenia, SSSR/Russia.

 

 

 

 

Involved in wars and conflicts:

  • Soviet war in Afghanistan
  • Iran–Iraq War
  • Persian Gulf War
  • Abkhazian War
  • First Chechen War
  • Second Chechen War
  • Ethiopian-Eritrean War
  • 2001 insurgency in the Republic of Macedonia
  • War in Darfur
  • Ivorian-French clashes
  • 2008 Russia–Georgia war
  • Iran
  • 2014-2015 conflict in Ukraine
  • 2014 Northern Iraq offensive

 Variants:

  • Su-25 – basic version, single seat, produced in Georgia
  • Su-25K – export version of basic version, produced in Georgia
  • Su-25UB – twin seat version / trainer
  • Su-25UBK – export variant of Su-25UB trainer
  • Su-25UBM – Su-25UBM is a twin seat variant that can be used as an operational trainer, but also has attack capabilities, and can be used for reconnaissance, target designation and airborne control.
  • Su-25UTG – is a variant of the Su-25UB designed to train pilots in takeoff and landing on a land-based simulated carrier deck, with a sloping ski-jump section and arrester wires. About 10 are produced, half remained in Russian service after 1991 and were used on Russia’s sole aircraft carrier, the Admiral Kuznetsov. This small number of aircraft were insufficient to meet the training needs of Russia’s carrier air group, so a number of Su-25UBs were converted into Su-25UTGs. These aircraft being distinguished by the alternative designation Su-25UBP
  • Su-25BM – is a target-towing variant of the Su-25 whose development began in 1986. The prototype, designated T-8BM1, successfully flew for the first time on 22 March 1990, at Tbilisi, and later was put into production.
  • Su-25T –  is a dedicated antitank version, which has been combat-tested with notable success in Chechnya. The design of the aircraft is similar to the Su-25UB ( unification of 85%). The variant was converted to one-seater, with the rear seat replaced by additional avionics
  • Su-25TM (Su-39) – A second-generation Su-25T, the Su-25TM (also designated Su-39), has been developed with improved navigation and attack systems, and better survivability. While retaining the built-in Shkval of Su-25T, it may carry Kopyo (rus. “Spear”) radar in the container under fuselage, which is used for engaging air targets (with RVV-AE/R-77 missiles) as well as ships (with Kh-31 and Kh-35 antiship missiles).
  • Su-25SM – is an “affordable” upgrade program for the Su-25, conceived by the Russian Air Force (RuAF) in 2000. The program stems from the attempted Su-25T and Su-25TM upgrades, which were evaluated and labeled as over-sophisticated and expensive. The SM upgrade incorporates avionics enhancements and air-frame refurbishment to extend the Frogfoot’s service life by up to 500 flight hours or 5 years. Navigation and attack precision provided by the new suite is three times better of the baseline Su-25 and is reported to be within 15 m (49 ft) using satellite correction and 200 m (660 ft) without it. Su-25SM weapon suite has been expanded with the addition of the Vympel R-73 highly agile air-to-air missile (albeit without helmet mounted cuing and only the traditional longitudinal seeker mode) and the S-13T 130 mm rockets (carried in five-round B-13 pods) with blast-fragmentation and armor-piercing warheads.
  • Su-25KM – nicknamed “Scorpion”, is an Su-25 upgrade program announced in early 2001 by the original manufacturer, Tbilisi Aircraft Manufacturing in Georgia, in partnership with Elbit Systems of Israel. The prototype aircraft made its maiden flight on 18 April 2001 at Tbilisi in full Georgian Air Force markings. Standard Su-25 air-frame, enhanced with advanced avionics including a glass cockpit, digital map generator, helmet-mounted display, computerized weapons system, complete mission pre-plan capability, and fully redundant backup modes. Performance enhancements include a highly accurate navigation system, pinpoint weapon delivery systems, all-weather and day/night performance, NATO compatibility, state-of-the art safety and survivability features, and advanced on board debriefing capabilities complying with international requirements. It has the ability to use Mark 82 and Mark 83 laser-guided bombs and air-to-air missiles, the short-range Vympel R-73.
  • Su-28 –  is an advanced basic jet trainer, built on the basis of the Su-25UB as a private initiative by the Sukhoi Design Bureau. The Su-28 is a light aircraft designed to replace the Czechoslovak Aero L-39 Albatros. Unlike the basic Su-25UB, it lacks a weapons-control system, built-in cannon, weapons hard-points, and engine armour.
  • Su-25R – a tactical reconnaissance variant designed in 1978, but never built.
  • Su-25U3 – also known as the “Russian Troika”, was a three-seat basic trainer aircraft. The project was suspended in 1991 due to lack of funding
  • Su-25U – a trainer variant of Su-25s produced in Georgia between 1996 and 1998. Three aircraft were built in total, all for the Georgian Air Force.
  • Su-25M1 – modernized by Ukrainian Air Force, one built, few more are ordered.
  • Su-25UBM1 –  modernized by Ukrainian Air Force
QGk718p

Su-25 firing S-25 330mm rockets

 

Su-25 have 11 hardpoints and can carry about 4.000 kg loads:

Gun: 1 × GSh-30-2 30mm cannon with 250 rounds

Rockets:  UV-32-57 57 mm or B8M1 80 mm rocket pods, S-24 (240 mm (9.4 in)) or S-25 (330 mm (13 in)) rockets

Missiles: Kh-23 (AS-7), AS-9, Kh-25L (AS-10), Kh-29 (AS-14) air-to-surface missiles, K-13 (AA-2) or R-60 (AA-8) air-to-air missiles

BombsFAB-250, FAB-500, KAB-500 laser-guided bomb

Vozduhoplovnisili2

Su-25 with types of weapon can carry

Peruvian_Air_Force_Sukhoi_Su-25_SDLP-1

Peruvian Air Force Su-25

source: Wikki

Austrian Drakens (SAAB 35) over Alps

The Saab 35 Draken was a Swedish fighter aircraft manufactured by Saab between 1955 and 1974. The Draken was built to replace the Saab J 29 Tunnan and, later, the fighter variant (J 32B) of the Saab 32 Lansen. The indigenous J 35 was an effective supersonic Cold War fighter that was also successfully exported to Austria, Denmark and Finland.

Austrian Air Force received 24 Drakens, and retired them from service.

Draken_05

Austrian Air Force SAAB-35 Draken

General characteristics

  • Crew: 1
  • Length: 15.35 m (50 ft 4 in)
  • Wingspan: 9.42 m (30 ft 10 in)
  • Height: 3.89 m (12 ft 9 in)
  • Wing area: 49.22 m² (529.82 ft²)
  • Empty weight: 7 865 kg (17 340 lb)
  • Loaded weight: 11 400 kg (25 132 lb)
  • Max. takeoff weight: 16 000 kg (35 273 lb)
  • Powerplant: 1 × Volvo Flygmotor RM 6C afterburning turbojet
    • Dry thrust: 56.5 kN (12 787 lbf)
    • Thrust with afterburner: 78.4 kN (17 637 lbf)

Performance

  • Maximum speed: Mach 2.2
  • Range: 3 250 km (2 020 mi) with external drop tanks
  • Service ceiling: 18 000 m (59 000 ft)
  • Rate of climb: 175 m/s (34 450 ft/min)
  • Wing loading: 231.6 kg/m² (47.4 lb/ft²)
  • Thrust/weight: 0.70
  • Takeoff roll: 800 m (2 623 ft)

Armament

  • Guns: 1× or 2× 30 mm M-55 ADEN cannon with 100 rounds per gun (in Saab 35F left cannon omitted to fit avionics needed for Falcon missile integration, earlier variants and export variants retained twin guns.)
  • Hardpoints: for fuel tanks or ordnance with a capacity of 2 900 kg (6 393 lb) and provisions to carry combinations of:
    • Rockets: 2× 75 mm air-to-air rocket pods ventrally or 12× 135 mm rockets on six underwing pylons
    • Missiles: Rb 24, Rb 27 and Rb 28 air-to-air missiles
    • Bombs: 55-, 220-, 500-, and 1 000-pound bombs

 

About Yakovlev Yak-141 “Freestyle”

The Yakovlev Yak-141 (Яковлева Як-141; NATO reporting name “Freestyle”), also known as the Yak-41, was a supersonic vertical takeoff/landing(VTOL) fighter aircraft designed by Yakovlev. It was used for testing.

Freestyle was first supersonic VTOL aircraft in the world. 

Yak-141 has three engines. The main engine was served by four side-mounted ducts as well as a row of large louvers along the upper surface to allow air to enter the engine during full power hovering. This engine was the R-79V-300, a two-shaft augmented turbofan with a bypass ratio of 1. Maximum thrust was 14,000 kg (30,864 lb). The rear nozzle could rotate from 0 degrees to 95 degrees for VTOL landing and hovering. The two lift engines were the RD-41 design, a simple single-shaft engine made mostly of titanium. Each had a thrust of 4,100 kg (9,040 lb). The engines were installed behind the cockpit at an angle of 85 degrees. Like the Yak-38, the engines received their air through eight spring-operated dorsal flaps, and the exhaust exited through a belly opening covered by two ventral doors.

Yakovlev_Yak-141_at_1992_Farnborough_Airshow_(3)

Yakovlev obtained funding for four prototypes. The first (48-0, with no callsign) was a bare airframe for static and fatigue testing. The second (48-1, call sign “48”) was a non-flying powerplant testbed. The third and fourth (48-2 and 48-3, call signs “75” and “77”) were for flight testing. While 48-1 remained unpainted, 48-2 and 48-3 were painted in overall grey, with a black radome and fin cap antennas.

jakowlew-jak-141.jpg.3254420

Someone can say F-35 is a copy of Yak-141, and there is some truth. Lockheed was involved in this project, believe or not. Yakovlev stayed without funds to test more prototypes like Yak-41M, so they called few foreign companies to help them. Lockheed corporation (U.S.A.) was in the process of developing the X-35 for the US Joint Strike Fighter program then, so it was good for both sides to join knowledge and experience.

With Lockheed assistance, Yak-141 prototype 48-2 was displayed at the Farnborough Airshow in September 1992. Yakovlev announced that they had reached an agreement with Lockheed for funds of $385 to $400 million for three new prototypes and an additional static test aircraft to test improvements in design and avionics. Planned modifications for the proposed Yak-41M included an increase in STOL weight to 21,500 kg (47,400 lb). One of the prototypes would have been a dual-control trainer. Though no longer flyable, both 48-2 and 48-3 were exhibited at the 1993 Moscow airshow. The partnership began in late 1991, though it was not publicly revealed by Yakovlev until 6 September 1992, and was not revealed by Lockheed until June 1994.

Soviet supersonic VTOL Yak-41(141).

First flight of the Yak-141 was on 9 March 1987, program canceled in August 1991.

General characteristics

  • Crew: 1
  • Length: 18.36 m (60 ft 2¼ in)
  • Wingspan: 10.105 m (33 ft 1½ in)
  • Height: 5.00 m (16 ft 5 in)
  • Wing area: 31.7 m² (341 ft²)
  • Empty weight: 11,650 kg (25,683 lb)
  • Max. takeoff weight: 19,500 kg (42,989 lb)
  • Powerplant: 1 × Soyuz R-79V-300 ( ru) lift/cruise turbofan
    • Dry thrust: 108 kN (24,300 lbf)
    • Thrust with afterburner: 152 kN (34,170 lbf)
  • Lift engines: 2x RKBM RD-41 (ru) turbojets 41.7 kN (9,300 lbf) thrust each)

yak-141

Performance

  • Maximum speed: 1,800 km/h (1,118 mph, Mach 1.4+)
  • Range: 2,100 km (1,305 mi)
  • Ferry range: 3,000 km (1,865 mi)
  • Service ceiling: 15,500 m (50,853 ft)
  • Rate of climb: 250m/s (15,000 m/min) (49,213 ft/min)

Armament

  • Guns: 1 × 30 mm GSh-301 cannon with 120 rounds
  • Hardpoints: 4 underwing and 1 fuselage hardpoints with a capacity of 2,600 kg (5,733 lb) of external stores and provisions to carry combinations of:
    • Missiles: R-73 Archer, R-77 Adder or R-27 Alamo air-to-air missiles

Yakovlev_Yak-141_at_1992_Farnborough_Videan

Su-47 (S-37 Berkut) Golden Eagle Fighter

The Sukhoi Design Bureau of Moscow, Russia has developed the Su-47 (previously called the S-37 Berkut or Golden Eagle) fighter aircraft, which first flew in September 1997. Su-47 is in a forward-swept wing configuration and uses a highly unstable triplane (with three main lifting surfaces) aerodynamic configuration. The Su-47 was introduced in January 2000 and completed the first stage of flight trials in December 2001. The aircraft is operated by the Russian Air Force

Su-47 Berkut

Su-47 Berkut

In May 2002, Sukhoi was selected as prime contractor for the next-generation Russian PAK FA fighter programme. The PAK FA fighter aircraft is a development of the Su-47 but without the forward swept wings. The first flight test of the PAK FA fighter aircraft was completed on 29 January 2010.

The design of the very high manoeuvrability prototype is based on the avionics and aerodynamics technologies developed for the Su-27 upgrade programme.

Some of the systems and component designs from the Su-27, (the all weather supersonic fighter aircraft with Nato reporting name Flanker), have been used in the Su-47, for example the design of the canopy, landing gear, some of the avionics and the near-vertical tails.

Su-47manoeuvrability

The Su-47 has extremely high agility at subsonic speeds enabling the aircraft to alter its angle of attack and its flight path very quickly, and it also retains manoeuvrability in supersonic flight.The Su-47 aircraft has very high levels of manoeuvrability with maintained stability and controllability at all angles of attack.

Maximum turn rates and the upper and lower limits on air speed for weapon launch are important criteria in terms of combat superiority in close combat and also at medium and long range, when the mission may involve engaging consecutive targets in different sectors of the airspace. A high turn rate of the Su-47 allows the pilot to turn the fighter aircraft quickly towards the next target to initiate the weapon launch.

“The Su-47 has extremely high agility at subsonic speeds.”

The swept-forward wing, compared to a swept-back wing of the same area, provides a number of advantages: higher lift to drag ratio; higher capacity in dogfight manoeuvres; higher range at subsonic speed; improved stall resistance and anti-spin characteristics; improved stability at high angles of attack; a lower minimum flight speed; and a shorter take-off and landing distance.

1_1_b2

 

Su-47 fuselage

The Su-47 fuselage is oval in cross section and the airframe is constructed mainly of aluminium and titanium alloys and 13% by weight of composite materials.

The nose radome is slightly flattened at the fore section and has a horizontal edge to optimise the aircraft’s anti-spin characteristics.

Forward-swept wings

The forward swept midwing gives the unusual and characteristic appearance of the Su-47. A substantial part of the lift generated by the forward-swept wing occurs at the inner portion of the wingspan. The lift is not restricted by wingtip stall. The ailerons – the wing’s control surfaces – remain effective at the highest angles of attack, and controllability of the aircraft is retained even in the event of airflow separating from the remainder of the wings’ surface.

The wing panels of the Su-47 are constructed of nearly 90% composites. The forward-swept midwing has a high aspect ratio, which contributes to long-range performance. The leading-edge root extensions blend smoothly to the wing panels, which are fitted with deflectable slats on the leading edge; flaps and ailerons on the trailing edge.

The all-moving and small-area trapezoidal canards are connected to the leading-edge root extensions.

1291023597_su47bodega1eq8

Armament

The Su-47 experimental fighter aircraft features 14 hardpoints (2 wingtip, 6–8 underwing, 6-4 conformal underfuselage). The hardpoints are equipped with R-77, R-77PD, R-73, K-74 air to air missiles.

It is also fitted with air to surface missiles X-29T, X-29L, X-59M, X-31P, X-31A, KAB-500, KAB-1500.

Click to enlarge

Cockpit

The cockpit’s design has focused on maintaining a high degree of comfort for the pilot and also on the pilot being able to control the aircraft in extremely high g-load manoeuvres.

“The wing panels of the Su-47 are constructed of nearly 90% composites.”

The aircraft is equipped with a new ejection seat and life support system. The variable geometry adaptive ejection seat is inclined at an angle of 60°, which reduces the impact of high G forces on the pilot. The seat allows dogfight manoeuvres with significantly higher g loadings than can normally be tolerated by the pilot.

The pilot uses a side-mounted, low-travel control stick and a tensometric throttle control.

1598807

Landing gear

The aircraft uses a retractable tricycle-type landing gear with a single wheel at each unit. The smaller nose wheel retracts towards the rear and the two mainwheels retract forward into the wing roots.

Bt4IcJ7IYAEMXM_

Engine

The Su-47 fighter aircraft is powered by two Perm Aviadvigatel D-30F6 turboshaft engines. Around 83.4kN of dry thurst can be produced by each engine. The engine is principally used in short-haul airplanes for passenger transport.

The length and fantip diameter of the engine are 3.98m and 1.05m respectively, while the dry weight and delivery weight of the engine are 1,550kg and 1,712kg respectively. The engine also features a thrust reverser and a low pressure compressor.

Su-47 performance

The Su-47 fighter aircraft can climb at a rate of 233m/s. The cruise speed is 1,800km/h. The range and service ceiling of the aircraft are 1,782nm (3,300km) and 18,000m respectively.

The maximum take-off weight of the aircraft is 34,000kg. The wing loading and maximum g-force of the Su-47 are 360kg/m² and 9g respectively.

 

source: Sukhoi and airforce-technology.com

1 34 35 36 37