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Yak 141 Freestyle

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The Yakovlev Yak-41 (NATO reporting name Freestyle) was a supersonic VTOL fighter aircraft from the Soviet Union. Although it never entered operational service, some of its advanced technology will see application on Lockheed-Martin's F-35 fighter The Yak-141 (a development prototype of the Yak-41) was, like the 1960s prototype Dassault Mirage Balzac/Mirage VIIIV, an attempt at a supersonic VTOL aircraft. The British Hawker-Siddeley P.1154 supersonic version of the Hawker Siddeley Harrier project was cancelled as part of the massive defense cuts of 1960s before a prototype could be built.The Yak 141 gained VTOL ability through a combination of a lift and lift/cruise engines, as did the Balzac and earlier Yak VTOL designs. The two lift jets were mounted behind the cockpit. These contributed only to take-off and once in horizontal flight were switched off. The main engine was installed in the rear fuselage area, with a swivelling nozzle and an afterburner. For take off and hovering the exhaust from the jet was vectored downwards through 90° working in conjunction with the forward lift jets. To obtain sufficient power for vertical take off, the afterburner had to be used, which imposed serious limitations on the types of runway surfaces that could be used.The Yak-41M was capable of speeds up to Mach 1.7, and was claimed to have had a maneuverability comparable to the Mikoyan MiG-29. It was designed for the Soviet Air Force (VVS), not for the Soviet Navy (VMF), as the original Yak-41 was.General characteristics * Crew: one, pilot * Length: 18.30 m (60 ft 0 in) * Wingspan: 13.97 m (45 ft 10 in) * Height: 5.00 m (16 ft 5 in) * Wing area: 31.7 m² (341 ft²) * Empty weight: 11 650 kg (25,680 lb) * Loaded weight: kg (lb) * Max takeoff weight: 19 500 kg (43,000 lb) * Powerplant: 1× MNPK Soyuz R-79V-300 turbojet, 108 kN (24,300 lbf) * Powerplant: 2x RKBM RD-41 42 kN (9,300 lbf) thrust each) Performance * Maximum speed: Mach 1.7 * Range: 1400 km (870 statute miles) * Service ceiling: 15 500 m (50,850 ft) * Rate of climb: m/s (ft/min) * Wing loading: kg/m² (lb/ft²) Armament * 1 x 30 mm GSh-301 cannon with 120 rounds * Four underwing and one fuselage hardpoints for 2 600 kg (5,500 lb) of external stores

Channel: Howto & Style
Uploaded: November 30, 1999 at 12:00 am
Author: zeoul001

Length: 01:34
Rating: 4.69
Views: 79459

Tags: 747  787  A380  airbus  aircraft  airplane  boeing  fighter  jet  off  plane  russian  sky  take  verical  warbird  Yak-141  Yakovlev  

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66Brian99 (November 30, 1999 at 12:00 am)
more or less you're rigth...:)
zipacna1980 (November 30, 1999 at 12:00 am)
tell me at least hundred, can you?:) sci&tech espionage was helped to make hundreds american tech too. both sides about equally used it.
SrbinZaUvek1 (November 30, 1999 at 12:00 am)
Can somebody confirm how many Yakovlev 141's were made? Im just wondering, my guess puts it at around 20-25
JazzBassBloke (November 30, 1999 at 12:00 am)
I don't buy that story timberbridge - RR and GE are quite capable of coming up with such a three bearing nozzle on their own (as indeed they have with their respective inputs to the F35 program) - its not such a technical leap.
conotoxin (November 30, 1999 at 12:00 am)
timberbridge - Bullshit. The F35 lift system is completely different from the yak's. The yak used seperate lift jet engines to get off the ground. The f35 has a single engine and uses an elegant solution of the lift fan to get off the crowd. Another difference. The f35 works.
conotoxin (November 30, 1999 at 12:00 am)
265Spike - Yeah except they are nothing alike. The f-35 uses a lift fan connected to the engine via a clutch. Not 2 seperate RKBM RD-41 lift engines. So you are a bullshitter.
66Brian99 (November 30, 1999 at 12:00 am)
still nothing compared to hundreds of stolen technologies from US by USSR
timberbridge (November 30, 1999 at 12:00 am)
It's true, the Russians sold this tech to the U.S. for the F-35 program. At the time, this was published in "Aviation" magazine among others. Also the Yak 141 is a lot older than the F35 program. Then there's the fact that it uses a rotating main thrust nozzle and an independent thrust aft the cockpit, just as the subsequent F35 design. It's the U.S. that "copied and pasted" with the help of their credit card.
retsnom92 (November 30, 1999 at 12:00 am)
wasent the yak 141 stoped in like 1999 or something?
265Spike (November 30, 1999 at 12:00 am)
ponchoyo f- 35 VTOL system is copy of russian yak-141 VTOL system, it is well known fact, russians sold to the US old technology to safe their business, now they got more advanced technology, but it's now secret.

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