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Author Topic: Yak-141  (Read 11605 times)

Offline Flanker.94

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Yak-141
« on: April 16, 2007, 11:45:45 PM »
Guys, do you have any information about the Yak-141? I think it will replace the Yak-36, am I wrong? Her is picture I found:
It's time to dive in the fireworks!

Offline Flanker.94

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Re: Yak-141
« Reply #1 on: April 16, 2007, 11:47:53 PM »
Oops! I did an error; I think the Yak-141 will replace the Yak-38, not the Yak-36.
It's time to dive in the fireworks!

Offline Cobra2

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Re: Yak-141
« Reply #2 on: April 17, 2007, 01:40:44 AM »
I found some information for you:


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-141M was supposed to fly at speeds of Mach 1.7, but it was never able to fly supersonic, and was claimed to have had a maneuverability comparable to the MiG-29 'Fulcrum'. It was designed for the Soviet Air Force (VVS), not for the Soviet Navy (VMF), as was the original Yak-41.





The program was initiated in 1975 as the Yak-141, a development of the Yak-38. The first conventional flight of the Yak-41 was on March 9 1987, and the first hovering flight on December 29 1989. The Yak-41M designation was adopted around 1991 to reflect a shift to a multi-role configuration.

In August 1991 the program was stopped because of the shrinking military budget of the Soviet Union. The Yakovlev design bureau has attempted to generate interest in reviving the program, including the proposal for an advanced version known as the Yak-43, but has yet to find interest.


Related development
Yak-36 - Yak-38 - Yak-43


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








Hope that helps :)

Source: Wikipedia



Offline Webmaster

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Re: Yak-141
« Reply #3 on: April 17, 2007, 02:05:26 AM »
The Russian Navy opted for bigger carriers with ski-ramps to enable larger and better fighters to be carried on board, the Su-27K (Su-33) and MiG-29K. The latter also did not enter service because of the USSR breakdown, but the know-how and designation is now used again to build new, modern MiG-29Ks based on the MiG-29M/M2 for the Indian Navy. Russia ended up with only one carrier, with a squadron of Su-33s and a handful of Su-25UTG as trainers. The aircraft carrying cruisers and Yak-38s were retired a long time ago.

According to one source (or a couple?), some of the Yak-41/141 design know-how was put to use in the JSF X-35B SVTOL variant. I am not sure if it is true... Lockheed/Yakovlev co-op? Hmmm.

Quote
The Yakovlev design bureau has attempted to generate interest in reviving the program, including the proposal for an advanced version known as the Yak-43, but has yet to find interest.

I think this piece is a bit dated, I don't believe Yakovlev is still trying this, they have the Yak-130 advanced trainer now to worry about, although selected by the RuAF, they still have to complete the program and find export buyers and interest for possible derivatives (see picture). Yakovlev has some other products (for example the carrier-borne Yak-44 AEW) which might have more future, not to mention their UAV and commercial projects. The RuAF doesn't need a VTOL fighter, and the Navy is going after bigger carriers for the future with Sukhoi's and MiGs onboard.

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Offline Gripen

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Re: Yak-141
« Reply #4 on: April 17, 2007, 08:20:20 AM »
God this plane is UGLEE!

Offline Flanker.94

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Re: Yak-141
« Reply #5 on: April 17, 2007, 05:54:42 PM »
Thank you for the information, guys.
It's time to dive in the fireworks!

Offline Flanker.94

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Re: Yak-141
« Reply #6 on: April 17, 2007, 05:57:21 PM »
Do you know if the Yak-141, or Yak-41 will enter service and when?
It's time to dive in the fireworks!

Offline Flanker.94

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Re: Yak-141
« Reply #7 on: April 17, 2007, 05:59:14 PM »
God this plane is UGLEE!

Wich plane is ugly? When did the Yak-38 was retired and why?
It's time to dive in the fireworks!

Offline Gripen

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Re: Yak-141
« Reply #8 on: April 18, 2007, 03:51:13 AM »
The 141 is uglee. eew. i thought russia had taste, i mean look at the Flanker Family and the Mig 29!!

Offline Webmaster

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Re: Yak-141
« Reply #9 on: April 21, 2007, 02:33:34 PM »
Do you know if the Yak-141, or Yak-41 will enter service and when?

It won't... read my reply

Quote from: Flanker.94
When did the Yak-38 was retired and why?

June 1991, following a crash all were grounded and withdrawn from service, safety and USSR collapse were the main reasons for its early retirement, not to mention its poor capabilities

Quote from: Gripen
The 141 is uglee. eew. i thought russia had taste, i mean look at the Flanker Family and the Mig 29!!

Ow yeah, looks are so important for combat aircraft....come on. It's not a beauty contest.

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Offline Gripen

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Re: Yak-141
« Reply #10 on: April 22, 2007, 11:26:21 AM »
Yeah, but being shot down by a model is better then being down by a ugly biker.


 



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