Various Post-War Yakovlev (Yak) Projects & Prototypes

[visvirtusvoluntas]

Hello Piotr,
the source is "Early Soviet Jet Fighters" 2014 Edition.

Not to be confused with 2002 Edition.

 

[Petrus]

Hello Piotr,
the source is "Early Soviet Jet Fighters" 2014 Edition.

Not to be confused with 2002 Edition.

Thanks for the info. I've never heard of the 2014 Edition. I must look for it.

P.

 

[visvirtusvoluntas]

It's essentially a brand new book. Double size than the first and very impressive for the amount of information, data, drawings and photographs.

 

[Deino]

Just found at the German FF posted by "Feldmaus": Finally a mock up of the new Yak-152 ! ... looks different to the one Rolf posted above. ??? ... and even more to the Chinese off-spring the CJ-7/L-7:
Deino

A rare image oft he CJ-7 prototype during its maiden flight ...

 

[Stargazer]

It's essentially a brand new book. Double size than the first and very impressive for the amount of information, data, drawings and photographs.

Interesting. I wasn't aware of this new version being so different!

 

[Antonio]

It's essentially a brand new book. Double size than the first and very impressive for the amount of information, data, drawings and photographs.

Almost decided to order a copy.

Could you please show here the contents page or the index?

Thanks in advance

Antonio

 

[GTX]

Looks very similar to the Su-49:

 

[visvirtusvoluntas]

It's essentially a brand new book. Double size than the first and very impressive for the amount of information, data, drawings and photographs.

Almost decided to order a copy.

Could you please show here the contents page or the index?

Thanks in advance

Antonio

This is the summary:

1- Mikoyan's first jets
2- Yakovlev's early jets
3- Lavochkin's first jets
4- Sukhoi's first jet fighters
5- The jet fighters of Semyon Alekseyev

432 pages, tons of pictures and drawings. Cover price £39.95 - $64.95

 

[hesham]

Hi Visvirtusvoluntas,


first do you have a brief name ?,and second,my dear Pometablava meant that,we want
to see a pages of index itself,can you scan and send them here ?,thanks.

 

[visvirtusvoluntas]

Hi Visvirtusvoluntas,


first do you have a brief name ?,and second,my dear Pometablava meant that,we want
to see a pages of index itself,can you scan and send them here ?,thanks.

First, you can call me Al
Second, I'll scan the summary but it is exactly the same as I wrote...

 

[visvirtusvoluntas]

But maybe you need this:

 

[Antonio]

Al,

Many thanks!

Antonio

 

[Cy-27]

Yakovlev Yak-25 (1947 - 1st use of designation)

A single seat experimental jet fighter derivative of the Yak-19. It also had a straight laminar flow wing but with a different cross-section of only 9% thickness/chord ratio and swept back tail surfaces. Only two were built.

Despite showing exceptional performance and agility characteristics, it lost out to the MiG-15 as the MiG had already been ordered in large quantities.

POWERPLANT: 1x Tumansky RD-500 turbojet (1,590 kgs st)
WING SPAN: 8.88 m
LENGTH: 8.65 m
EMPTY WEIGHT: 2,285 kg
ACCOMODATION: 1
MAXIMUM SPEED: 972 km/h
PRODUCTION: 2
ARMAMENT: 3 x 23 mm machine guns

SOURCES:
Krilya Rodiny 1995-10
University of Southampton Notes 1997

 

[Zizi6785]

Re: Yak-19


Are there any more 3view pictures of the early 1946 RD-10 versions of the Yak-19?
The book mentions about 5-6 versions with various dates.

More infos from "Early Soviet Jet Fighters", a superb book that I bought immediately after the publication, but left on my shelf for a while. I'm sorry for the quality of the scans, but my scanning device is small and I'm afraid to spoil the book...

This is the Yak-19 development:

1- First version with RD-10 engine, low wing, lateral air intakes, pod-and-boom layout. 6th June 1946.
2- Subsequent variant with same engine, mid wing, pod-and-boom. Closely reminding Lavochkin Samolet 150. 15th June 1946.

In the real Yak-19 was installed the RD-10F afterburning turbojet.

 

[visvirtusvoluntas]

I didn't see anything about.

 

[kaiserbill]

I've had a close look through this thread, and also through the Yak-141 thread, because whilst watching the video below, I noticed something.


At 6:44 onwards there is a model on the desk that has semi-rounded intakes, canards, and a twin tail. None of the pictures in this thread, nor the Yak-141 thread show an aircraft with that combination. A brief google image search also threw up nothing
Not being able to understand Russian, I assume this is a Yakovlev aircraft, related to the Yak-141......is it an early configuration, or something that was looked at later?

View: https://www.youtube.com/watch?v=e8_le1seUh8

 

[overscan (PaulMM)]

Like this?

 

[kaiserbill]

No Paul, although there are similarities....I really must learn how to do a screen grab from a video. :-[


The camera pans over the model between 6:50 to 7:02.
It has upward canted canards on the wing LERX, the twin vertical fins are not as canted as on your model above, and the engine exhaust isn't as far back as on the model above, being more akin to the Yak-141.

 

[CiTrus90]

Definitely not a Yak-141, nice catch Kaiserbill

Regards.

 

[CiTrus90]

Checked my copy of Buttler & Gordon Soviet Secret Projects: fighters since 1945. On page 101 is mentioned a pre-Yak-41 study with semi circular side intakes, twin fins and cranked delta wing a la Yak-45. I think this is our culprit.

Regards.

 

[kaiserbill]

Excellent..thanks for the screengrabs, CiTrus90.


I must have a look through my edition of that book...does it mention the upward canted canards?
It was the canards and semi-circular intakes that grabbed my attention when viewing the video.

 

[ivran]

Only 3 view, does anybody have data or dimensions
thanks in advance
very interesning projects

 

[ivran]

and

 

[hesham]

Only 3 view, does anybody have data or dimensions
thanks in advance
very interesning projects

Hi Ivran,


it was Yak-70,please see reply # 72.

 

[borovik]

Several options for preliminary designs of OKB-115, the first jet fighter with the engine JUMO-004, before finally was chosen scheme Yak-RD / Yak-15.
(from : N.Yakubovich-"Jet firstborn")

 

[Zizi6785]

Great find!


First one maybe an early Yak-19 project!

 

[hesham]

Several options for preliminary designs of OKB-115, the first jet fighter with the engine JUMO-004, before finally was chosen scheme Yak-RD / Yak-15.
(from : N.Yakubovich-"Jet firstborn")

Oh my God,you made my day,thank you my dear Borovik.

 

[borovik]

First one maybe an early Yak-19 project!
I had the same thoughts ... (probably is)), but I kept in the post text and punctuation from the aforementioned book. In the chapter on design bureau Yakovlev refers only to the three "birds": Yak-15 / Yak-RD-10 / Yak-17.
The work on the Yak-19, launched in June 1946, almost parallel with the Yak-RD-10, you have a more detailed look at the text of the new book by Gordon and Komissarov (starting with about 113 pages) I unfortunately do not have this book yet.

 

[hesham]

Hi,

the Yak-SKh was a project of agricultural aircraft,derived from Yak-54,powered by one
M-14 engine,single seat as estimated and second seat optional,has anyone a drawing
to it ?.

 

[hesham]

From Авиация и космонавтика 2015-3 & Авиация и космонавтика 2015-4,

here is a drawings and pictures to Yak-50,also Yak-60.

 

[hesham]

And;

 

[hesham]

And a Surprise,the Yak-M Drawing.

 

[Mikhael]

Yak-125B

 

[hesham]

Yak-125B

Nice find Mikhael.

 

[hesham]

From Kryl'ya Rodine 7-8/2015.

 

[Vladimir]

Yak-40 designed between January and June 1948. It was a single seat fighter powered by two 850 kgp ramjet engines mounted at the wingtips. The aircraft was 7.5 m long, with a wingspan of 5.05 m and an all-up weight of 1800 kg. Normally the fighter was to take off from a wheeled launch dolly accelerated by solid fuel rocket, landing on a centerline skid. Yakovlev OKB suggested using Yak-40 as parasite fighter to be suspended under Tu-4 wings in number of 6 (see image). The Yak-40A introduced a bicycle retractable landing gear and two rocket boosters for take off. Not built.

From; Аэрокосмическое обозрение №06 (67) 2013


here is again Yak-40 drawings in colors.

Cool, hesham, have You more info about it?

 

[hesham]

Hi,

here is a strange Yak-9V with modifications,maybe remained a Project ?.

Все самолеты-разведчики СССР: "Глаза" армии и Флота

 

[blackkite]

Hi! Yak-1000.

http://alternathistory.com/eksperimentalniy-samolet-yak-1000-sssr

"On the experimental Yak-1000 until now it has been little known: established in 1951 and never flew. Meanwhile, it was undoubtedly one of the most unusual aircraft of its time, it has already caused one kind of association with fantasy and wonder about it that has not yet been told anything. History of experimental aircraft Yak-1000 directly related to prospecting for TsAGI wings for high-speed aircraft, managed to restore the sparse and scattered documents preserved from those times, as well as the memories of direct participants in the events.

Yak-1000 was designed and built extremely quickly. By the end of February 1951 the aircraft was in flight test stations company at the airport L AI in Zhukovsky.

After the first runs of the Yak-1000, which brought so many problems, the designers have developed a number of activities to finalize the airplane. In particular, it was planned to set the wheels in place of underwing suspension, put in the nose of the aircraft chas 100 kg of cargo to the run-up to the front wheel better "keep the streak" and the plane does not expand the wind. It was also proposed to amend the structure of feathers and the tail section of the fuselage. Ended in March 1951 full-size mock tests Yak-1000 in a wind tunnel T-101 revealed that the take-off and landing speeds will be significantly higher than initially expected. This required further refinement and chassis to the limit exacerbated the already difficult problem of taking off and landing........... "

 

[blackkite]

Hi! Yakovlev LFI.
http://translate.google.fr/translate?hl=fr&sl=auto&tl=en&u=http%3A%2F%2Fwww.hitechweb.genezis.eu%2FfightersSF02.htm

Paralay-san's super site.
http://paralay.com/lfsyak.html
http://translate.google.fr/translate?hl=fr&sl=ru&tl=en&u=http%3A%2F%2Fparalay.com%2Flfsyak.html&sandbox=1

 

[blackkite]

Hi! Another beauty Yak-140. She had bicycle type landing gear.(For light weight realization?)

Wikipedia.
https://en.wikipedia.org/wiki/Yakovlev_Yak-140
"The prototype was completed in December 1954 and it passed all the necessary ground tests by 10 February 1955 when it was cleared to begin flight trials. However, MAP (Ministerstvo Aviatsionnoy Promyshlennosti—the Ministry of Aviation Industry) denied Yakovlev authorization to begin flight tests as it favored competing designs from Sukhoi and Mikoyan-Gurevich. A Council of Ministers directive was issued on 28 March 1956 to terminate the program and the corresponding MAP order followed on 6 April." As usual....... ???

Russian site.
http://www.airwar.ru/enc/xplane/yak140.html
"Of further interest to the Yak-140 is the fact that the light frontline fighter could easily compete with the well-known MiG-21.

Performance: vertical speed at the ground of 200 m / s and at an altitude of 15,000 m - 30 m / s. with; ceiling of more than 18,000 m, and the maximum speed at altitudes of 10,000-15,000 meters reaches 1700 km / h with its low wing loading and high thrust-weight ratio, lightweight fighter has excellent maneuverability both in the vertical and horizontal planes.

Yak-140 had different phenomenal for the time thrust-weight ratio, which is estimated to be slightly more than 1 (!), Which corresponds to the performance of modern fighter aircraft F-15, F-16, MiG-29 or Su-27. For comparison, the figure in the MiG-21F (1958) was 0.84, while the F- 104A - 0,83. This thrust-weight ratio combined with a relatively low thermal load on the wing would ensure the Yak-140 absolute advantage in air combat maneuvering. It is significant that modern fighter aircraft designed for the air superiority, different priorities in these qualities. "