Yak-141 Yakovlev Freestyle F-35/JSF "Udarnaya Sila"

[ARA662]

The Yak-141 is the world's first supersonic VTOL fighter.
Russians sold engine principle and technology to Lockheed-Martin in mid 90s.
F-35/JSF uses same engine principles as Yak-141.

At the end of the show the host mentions that Russian aircraft constructors
are not sitting in one place and already have a suprise for the Americans.

http://rapidshare.de/files/11678485/Udarnaja.Sila_-_Yak-141.part1.rar.html
http://rapidshare.de/files/11690805/Udarnaja.Sila_-_Yak-141.part2.rar.html
http://rapidshare.de/files/11693699/Udarnaja.Sila_-_Yak-141.part3.rar.html
http://rapidshare.de/files/11696275/Udarnaja.Sila_-_Yak-141.part4.rar.html
http://rapidshare.de/files/11697109/Udarnaja.Sila_-_Yak-141.part5.rar.html

http://www.yak.ru/PIC/MOD/141_0.jpg (http://www.yak.ru/PIC/MOD/141_0.jpg)

[JVeld]

Cant wait for the surprise.......Russians always made bad ass planes !!!

[akd]

Russians sold engine principle and technology to Lockheed-Martin in mid 90s.
F-35/JSF uses same engine principles as Yak-141.

That's a bit of an exaggeration. The Freestyle has two smaller engines and the JSF one powerful Pratt&Whitney F119-derivative engine (F119 is F-22 engine) with swivelling nozzle and coupled lift fan (lift fan is a Rolls Royce design). The vectoring engine nozzle is a Rolls Royce design patterned after the Yak-141 (but vectoring nozzles are not a design unique to Russia). More than anything, the Yak-141 inspired the lift plus cruise concept.

[balrog]

That's a bit of an exaggeration. The Freestyle has two smaller engines and the JSF one powerful Pratt&Whitney F119-derivative engine (F119 is F-22 engine) with swivelling nozzle and coupled lift fan (lift fan is a Rolls Royce design). The vectoring engine nozzle is a Rolls Royce design patterned after the Yak-141 (but vectoring nozzles are not a design unique to Russia). More than anything, the Yak-141 inspired the lift plus cruise concept.

Actually the Yak-38 Forger had two smaller lift/ cruise engines and the lift fans. The Yak-141 has one large lift cruise and two lift engines. The technology is used on the F-35.

[AmericanImperialist]

Actually the Yak-38 Forger had two smaller lift/ cruise engines and the lift fans. The Yak-141 has one large lift cruise and two lift engines. The technology is used on the F-35.

Actually the technology on the F-35 is one jet engine coupled to one lift fan. How is that in any way like the setup used on the 141?

[ARA662]

http://www.warfare.ru/usa/images/jsfpropboeing.jpg
F-35/JSF uses same engine principles as Yak-141 and constructed on scheme of Yak-141.

the winner of the JSF source selection in October 2001. Lockheed is now
developing its operational version of the concept as a supersonic multirole
aircraft to replace the Harrier.

http://www.vstol.org/wheel/VSTOLWheel/Lockheed-MartinX-35.htm

[..]The Yak-141 had its maiden flight some 25 years ahead of the
timeframe set by foreign manufacturers for creation of such a plane.
After the show in Farnborough, Yakovlev design bureau worked together
with Lockheed on Joint Strike Fighter (JSF) programme. As a result,
Lockheed's final JSF proposal resembles... the Yak-141M. [..]


During the summer of 1995, Lockheed Martin announced a teaming
arrangement with Yakovlev to assist in the former's bid for the JAST
(Joint Adanced Strike Technology) competition. Yakovlev's knowledge of
jet lift technology was to prove invaluable. Lockheed Martin was
subsequently selected to build a demonstrator aircraft, the X-35, which
went on to win the JSF (Joint Strike Fighter) competition and will soon
become a production fighter as the F-35.


[..] The swiveling rear exhaust is a licensed design from the Yakovlev
design bureau in Russia, which tried it out on the Yak-141 STOVL
fighter.[..]
AFA website http://www.afa.org/magazine/jan2002/0102jsf.asp


[..]The lift fan approach had the advantage that it minimized hot
exhaust ingestion back into engine, a common problem with STOVL designs
that robs them of vertical thrust. The scheme was similar to that
pioneered by the Russian Yakovlev Yak-141 "Freestyle" STOVL fighter,
which did not enter production. [..]
Faqs.org http://www.faqs.org/docs/air/avf35.html


http://www.jast.mil/Concepts/Con_X35_Tech.htm
"The exhaust from the engine flows through the 3 Bearing Swivel Nozzle
(3BSN). The 3BSN nozzle, developed by Rolls-Royce, was patterned along
the lines of the exhaust system on the Yakovlev Yak-141 STOVL prototype
that flew at the 1992 Farnborough air show."


http://www.abs.net/~maddock/LO/jsf/x35.htm (http://www.abs.net/%7Emaddock/LO/jsf/x35.htm)
"In 1995, Lockheed Martin signed an agreement with the Russian Yakovlev
Design Bureau and Pratt & Whitney signed one with the Soyuz Aero Engine
Company for information on the supersonic Yak-141 STOVL fighter and its
three bearing swivel duct nozzle. However, Lockheed apparently did not
benefit from the agreement and their return on the investment was
negligible."


I haven't read anything else about the return on the investment being
'negligible'. As it is I think the statement is quite suspect: "yes we
purchased the engine technology from the designers of the world's first
STOVL fighter, but no, we didn't get much out of it, in the end it was
all Lockheed know how!" Yeah, right.


http://www.aeroworldnet.com/1ra12087.htm
"In 1992/93 Lockheed contracted Yakovlev on some work pertaining to
short take-off/vertical landing (STOVL) aircraft studies in reference
to the JAST (JSF) project. Yakovlev shared its STOVL technologies with
the US company for several dozen million dollars.


"Former Yakovlev employees accuse Yakovlev heads of taking personal
interest out of the deal with Lockheed, because the official sum of the
contract did not correspond with the value of the information presented
to the US company. The data was on the Yak-141 test program,
aerodynamics and design features, including the design of the R-79
engine nozzles.


After a careful study of those materials, Lockheed - without much noise
- changed its initial JSF proposal, including a design of the engine
nozzles that is now very similar to those of the Yak-141."


http://www.janes.com/defence/air_forces/news/jawa/jawa010103_1_n.shtml
"Lockheed Martin's X-35 design has a trapezoidal wing planform which
initially featured foreplanes, although these since deleted; STOVL
version embodies a lift fan, shaft-driven by a modified F119 with a
vectoring lift/cruise nozzle developed by Rolls-Royce; lift fan
replaced by extra fuel in the CTOL version. Lockheed Martin also turned
to Russia for technical expertise, purchasing design data from
Yakovlev; and used an 86 per cent subscale model (originally developed
for the CALF project and fitted with a Pratt & Whitney F100-PW-220
engine plus an Allison shaft-driven lift fan) for testing"


So as you can see, the JSF runs on a russian engine :grin:

Source: Above Top Secret Forum

[Seiyuuki]

So as you can see, the JSF runs on a russian engine :grin:
A little bit misleading, P&W F135 is a derivative of the F119-PW-100, The lift system is a Russian's concept, but not the engine. The picture you posted is the engine employ by the X-32, more closely related in concept to the Harrier.

This is the F-35...

http://www.aircraftenginedesign.com/pictures/lockheed%20jsf%20cutaway.jpg

[Cifu]

The Yak-141 is the world's first supersonic VTOL fighter.
....

No, it's not. The first Supersonic VTOL fighter is the Dassault Mirage IIIV, reach Mach 2.04 in 1966 september.

http://www.airwar.ru/image/i/xplane/mirage3v-i.jpg

[RomanS]

ARA

thank you for donating the videos to us!

[scream73]

ARA

thank you for donating the videos to us!


Yeah, X2!!!

[cepera]

ARA, we should seriously present you an award for being the most contributive member on mp.net :)

[Levan]

The Yak-141 is the world's first supersonic VTOL fighter.
Russians sold engine principle and technology to Lockheed-Martin in mid 90s.
F-35/JSF uses same engine principles as Yak-141.


wake up dude. what principles you are talking about??? Yak has three engines, JSF only one. please show me the same engine principles. may be the design of engine fan might be similar....

this particular Yak-141 was the loosy unreliable plane with combat radius and combat load smaller than on earlier MiG-29`s so the programm was canceled.

[nick_ua]

No, it's not. The first Supersonic VTOL fighter is the Dassault Mirage IIIV, reach Mach 2.04 in 1966 september.

yehp you are right

this particular Yak-141 was the loosy unreliable plane with combat radius
you shi thead talking about Yak 38

[Levan]

A little bit misleading, P&W F135 is a derivative of the F119-PW-100, The lift system is a Russian's concept, but not the engine. The picture you posted is the engine employ by the X-32, more closely related in concept to the Harrier.

This is the F-35...

http://www.aircraftenginedesign.com/pictures/lockheed%20jsf%20cutaway.jpg


dont loose time. this is the most popular russian myth, about JSF beeing copied from Yak-141. russians are sure even that they got Jesus earlier than every one else o this planet. earlier on a few other forums i tried to explain the difference between single engine STOVL stealth multirole fighter and third generation thee engine fighter but they dont hear to me and refused to accept facts.

[Seiyuuki]

dont loose time. this is the most popular russian myth, about JSF beeing copied from Yak-141. russians are sure even that they got Jesus earlier than every one else o this planet. earlier on a few other forums i tried to explain the difference between single engine STOVL stealth multirole fighter and third generation thee engine fighter but they dont hear to me and refused to accept facts.

I wouldn't call it a myth, it is not a copy, but it is undeniable that Lockheed acquired certain concepts from Yakovlev, I consider the F-35 lift system as a direct improvement/evolution of the system originally employed by the Yak-141, regardless if it has three or two or one engine.

No need to degenerate into a pissing contest, this isn't the Cold War and if the Russian come up with something good and we can legally obtain the rights to the technology and vice versa, then more power to both countries.

[Levan]

I wouldn't call it a myth, it is not a copy, but it is undeniable that Lockheed acquired certain concepts from Yakovlev....

and Yakovlev from Hawker... that is called evolution. But nevertheless russains are still sure that STOVL is their native concept. as we can see it is not.

few more words about Yak-141, which is not a big step from earlier Yak-38, they share the same problems which where doubled in Yak-141. huge unreliable engines. difficulties in sinchronizing power package, very very limited combat load and radius of action. thereby first plane stayd in service for a short time and the later Yak-141 was cancelled.

[Cifu]

Excuse me, i was wrong. The first supersonic VTOL fighter is the German VJ101, wich in 1964 reach Mach 1.04. I apologize. :(


http://www.strange-mecha.com/aircraft/VTOL/vj101c.JPG

[Levan]

Excuse me, i was wrong. The first supersonic VTOL fighter is the German VJ101, wich in 1964 reach Mach 1.04. I apologize. :(


http://www.strange-mecha.com/aircraft/VTOL/vj101c.JPG

you tell me )))

[Scalpel22]

Excuse me, i was wrong. The first supersonic VTOL fighter is the German VJ101, wich in 1964 reach Mach 1.04. I apologize. :(


http://www.strange-mecha.com/aircraft/VTOL/vj101c.JPG

Ah thanks for the information. No need to apologize since it was an honest mistake.

[vryhpyammoadded]

I had always liked the 141 design; a quantum leap beyond the 38. Thanks for the vids.

Why does everyone get into engineering bragging rights contests? Its simple aerospace engineering principles that everyone has to stick with leading to similar functioning aircraft produced for similar purpose.
I’ve seen plenty of engineering design concepts using this setup going back as far as the fifties published by several companies. The 141 is only unique in that it flew first with this specific configuration, one of the most practical I might add. And yes, the JSF uses the same configuration and even had Yakovlev engineers help with the tilt nozzle.

On another subject
Does anyone here know if any of the Grumman and Sukoi collaboration aircraft ever got beyond the design stage? I remember reading years back that the two had contemplated combining talents but then nothing but silence. Together, they would make one hell of an aircraft.

[MK-ULTRA]

Guess the SU-15VD, in the mid 60's was also capable of supersonic speed :

http://vtol.boom.ru/rus/Su-15VD/

http://vtol.boom.ru/rus/Su-15VD/3.jpg

[MK-ULTRA]

Wow, that picture make me go hmmmm :

http://vtol.boom.ru/rus/Jak-43/2.jpg

http://vtol.boom.ru/rus/Jak-43/index.html

[Levan]

I checked at least 10 different web sites with infoabout Yak-141. every one on first pages is mentioned that Yak-141 is "the first ever supersonic STOVL capable to conduct flight".

there where few fundamenta problems while designing this particular airplane

1. Three engines (big fuel consumpton, hard to synchronize, maintenance)
2. due to its design only limited ammount of fuel and payload was available (the plane has twice less radius then MiG-29 which is also outsider in combat radius competition)
3. during every vertical take off and landing you must use afterburner. (destroys cover on flight decs)
4. Old design (almost every military plane designed or modificated at the same time incorporated stealth design)
5. It was not multirole (it means more money and time to be spent in the future)

thus the programm wa cabcelled. only two flightworthy planes where built, one was badly damaged in accident and later restored for ground tests.

[Levan]

Wow, that picture make me go hmmmm :

http://vtol.boom.ru/rus/Jak-43/2.jpg

http://vtol.boom.ru/rus/Jak-43/index.html


another borne-already-dead mythical russian fifth generation super fighter.....

you forgot to mention that on the web page where you found this picture Yak-141 is mentioned as 'fifth generation light fighter" (!!!!!!!!!!) and JSF is metioned as F-22 (WOW!!!!!)

[akd]

http://www.warfare.ru/usa/images/jsfpropboeing.jpg
F-35/JSF uses same engine principles as Yak-141 and constructed on scheme of Yak-141.

the winner of the JSF source selection in October 2001. Lockheed is now
developing its operational version of the concept as a supersonic multirole
aircraft to replace the Harrier.

http://www.vstol.org/wheel/VSTOLWheel/Lockheed-MartinX-35.htm

[..]The Yak-141 had its maiden flight some 25 years ahead of the
timeframe set by foreign manufacturers for creation of such a plane.
After the show in Farnborough, Yakovlev design bureau worked together
with Lockheed on Joint Strike Fighter (JSF) programme. As a result,
Lockheed's final JSF proposal resembles... the Yak-141M. [..]


During the summer of 1995, Lockheed Martin announced a teaming
arrangement with Yakovlev to assist in the former's bid for the JAST
(Joint Adanced Strike Technology) competition. Yakovlev's knowledge of
jet lift technology was to prove invaluable. Lockheed Martin was
subsequently selected to build a demonstrator aircraft, the X-35, which
went on to win the JSF (Joint Strike Fighter) competition and will soon
become a production fighter as the F-35.


[..] The swiveling rear exhaust is a licensed design from the Yakovlev
design bureau in Russia, which tried it out on the Yak-141 STOVL
fighter.[..]
AFA website http://www.afa.org/magazine/jan2002/0102jsf.asp


[..]The lift fan approach had the advantage that it minimized hot
exhaust ingestion back into engine, a common problem with STOVL designs
that robs them of vertical thrust. The scheme was similar to that
pioneered by the Russian Yakovlev Yak-141 "Freestyle" STOVL fighter,
which did not enter production. [..]
Faqs.org http://www.faqs.org/docs/air/avf35.html


http://www.jast.mil/Concepts/Con_X35_Tech.htm
"The exhaust from the engine flows through the 3 Bearing Swivel Nozzle
(3BSN). The 3BSN nozzle, developed by Rolls-Royce, was patterned along
the lines of the exhaust system on the Yakovlev Yak-141 STOVL prototype
that flew at the 1992 Farnborough air show."


http://www.abs.net/~maddock/LO/jsf/x35.htm (http://www.abs.net/%7Emaddock/LO/jsf/x35.htm)
"In 1995, Lockheed Martin signed an agreement with the Russian Yakovlev
Design Bureau and Pratt & Whitney signed one with the Soyuz Aero Engine
Company for information on the supersonic Yak-141 STOVL fighter and its
three bearing swivel duct nozzle. However, Lockheed apparently did not
benefit from the agreement and their return on the investment was
negligible."


I haven't read anything else about the return on the investment being
'negligible'. As it is I think the statement is quite suspect: "yes we
purchased the engine technology from the designers of the world's first
STOVL fighter, but no, we didn't get much out of it, in the end it was
all Lockheed know how!" Yeah, right.


http://www.aeroworldnet.com/1ra12087.htm
"In 1992/93 Lockheed contracted Yakovlev on some work pertaining to
short take-off/vertical landing (STOVL) aircraft studies in reference
to the JAST (JSF) project. Yakovlev shared its STOVL technologies with
the US company for several dozen million dollars.


"Former Yakovlev employees accuse Yakovlev heads of taking personal
interest out of the deal with Lockheed, because the official sum of the
contract did not correspond with the value of the information presented
to the US company. The data was on the Yak-141 test program,
aerodynamics and design features, including the design of the R-79
engine nozzles.


After a careful study of those materials, Lockheed - without much noise
- changed its initial JSF proposal, including a design of the engine
nozzles that is now very similar to those of the Yak-141."


http://www.janes.com/defence/air_forces/news/jawa/jawa010103_1_n.shtml
"Lockheed Martin's X-35 design has a trapezoidal wing planform which
initially featured foreplanes, although these since deleted; STOVL
version embodies a lift fan, shaft-driven by a modified F119 with a
vectoring lift/cruise nozzle developed by Rolls-Royce; lift fan
replaced by extra fuel in the CTOL version. Lockheed Martin also turned
to Russia for technical expertise, purchasing design data from
Yakovlev; and used an 86 per cent subscale model (originally developed
for the CALF project and fitted with a Pratt & Whitney F100-PW-220
engine plus an Allison shaft-driven lift fan) for testing"


So as you can see, the JSF runs on a russian engine :grin:

Source: Above Top Secret Forum


Nice cut and paste job. Might want to reconsider your source considering that is not X-35 engine at the top. :roll:

[MK-ULTRA]

another borne-already-dead mythical russian fifth generation super fighter.....

you forgot to mention that on the web page where you found this picture Yak-141 is mentioned as 'fifth generation light fighter" (!!!!!!!!!!) and JSF is metioned as F-22 (WOW!!!!!)

Did'nt even noticed that.