Sukhoi Design Bureau
Sukhoi Su-25 Grach "Frogfoot"
Sukhoi Design Bureau Sukhoi Su-25 Frogfoot
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| A Russian Air Force Su-25 | |
| Role | Close air support |
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| National origin | Soviet Union / Russia / Georgia |
| Design group | Sukhoi |
| Built by | TAM Management Tbilisi Aircraft Manufacturing Ulan-Ude Aviation Plant |
| First flight | 22 February 1975; 49 years ago |
| Introduction | 19 July 1981 |
| Status | In service |
| Primary users | Russian Aerospace Forces Ukrainian Air Force Korean People's Army Air Force Peruvian Air Force See Operators for others |
| Produced | 1978–2017 |
| Number built | Over 1,000 |
| Variants | Sukhoi Su-28 |
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History Sukhoi Design Bureau
Сухой Су-25
Sukhoi Su-25 Grach "Frogfoot"
The Sukhoi Su-25 Grach (Russian: Грач (rook); NATO reporting name: Frogfoot) is a subsonic, single-seat, twin-engine jet aircraft developed in the Soviet Union by Sukhoi. It was designed to provide close air support for Soviet Ground Forces. The first prototype made its maiden flight on 22 February 1975. After testing, the aircraft went into series production in 1978 in Tbilisi in the Georgian Soviet Socialist Republic.
Design
The Su-25 has a conventional aerodynamic layout with a shoulder-mounted trapezoidal wing and a traditional tailplane and rudder. Several metals are used in the construction of the airframe: 60% aluminium, 19% steel, 13.5% titanium, 2% magnesium alloy and 5.5% other materials.
All versions of the Su-25 have a metal cantilever wing, of moderate sweep, high aspect ratio and equipped with high-lift devices. The wing consists of two cantilever sections attached to a central torsion box, forming a single unit with the fuselage. The air brakes are housed in fairings at the tip of each wing. Each wing has five hardpoints for weapons carriage, with the attachment points mounted on load-bearing ribs and spars. Each wing also features a five-section leading edge slat, a two-section flap and an aileron.
The flaps are mounted by steel sliders and rollers, attached to brackets on the rear spar. The trapezoidal ailerons are near the wingtips. The fuselage of the Su-25 has an ellipsoidal section and is of semi-monocoque, stressed-skin construction, arranged as a longitudinal load-bearing framework of longerons, beams and stringers, with a transverse load-bearing assembly of frames. The one-piece horizontal tailplane is attached to the load-bearing frame at two mounting points
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Sukhoi Design Bureau Сухой Су-25
Sukhoi Su-25 Grach "Frogfoot"
Sukhoi Design Bureau Сухой Су-25
Sukhoi Su-25 Grach "Frogfoot"
General Info
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- Crew: 1
- Length: 15.53 m (50 ft 11 in) (including nose probe)
- Wingspan: 14.36 m (47 ft 1 in)
- Height: 4.8 m (15 ft 9 in)
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Powerplant
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- Empty weight: 9,800 kg (21,605 lb)
- Gross weight: 14,440 kg (31,835 lb)
- Max takeoff weight: 19,300 kg (42,549 lb)
- Powerplant: 2 × Soyuz/Tumansky R-195 turbojet engine, 44.18 kN (9,930 lbf) thrust each
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Performance
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- Maximum speed: 975 km/h (606 mph, 526 kn)
- Maximum speed: Mach 0.79
- Range: 1,000 km (620 mi, 540 nmi)
- Combat range: 750 km (470 mi, 400 nmi) at sea level with 4,400 kg (9,700 lb) of ordnance and two external fuel tanks
- Service ceiling: 7,000 m (23,000 ft)
- g limits: +6.5
Armament
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Guns:
- 1 × 30 mm Gryazev-Shipunov GSh-30-2 autocannon with 250 rounds
- SPPU-22 gun pods for 2 × 23 mm Gryazev-Shipunov GSh-23 autocannons with 260 rounds
- Hardpoints: 11 hardpoints with a capacity of up to 4,400 kg (9,700 lb) of stores
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Guns:
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Links to Youtube & Others
In February 2017, it was announced that Russia's United Aircraft Corporation had signed a contract with its subsidiary Ilyushin Aviation Complex for the development of a new version of Ilyushin Il-96-400 wide-body passenger airliner to compete with the Boeing 777-9 and Airbus A350-1000.
Sukhoi Design Bureau
Sukhoi Su-25 Frogfoot
By January 2020, the first test-flight airframe was in final assembly and the wing and fuselage were joined, to be finished at the end of 2020 before a first flight in 2021
Youtube Link
Projected double-deck version of Il-96 for 550-600 passengers and powered by Kuznetsov NK-93 propfan engines. Following flight tests in 2007 the engines were removed and the aircraft was not developed further.
Read more in Sukhoi Design Bureau Sukhoi Sukhoi Su-25 Grach "Frogfoot"
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