Various Post-War Yakovlev (Yak) Projects & Prototypes

[visvirtusvoluntas]

Yakovlev Factory

These are from the book "ОПЫТНОЕ КОНСТРУКТОРСКОЕ БЮРО ИМЕНИ А.С. ЯКОВЛЕВА" - Experimental Design Bureau named after A. S. YAKOVLEV

Various aspects of the Yakovlev's production plants.

 

[hesham]

Amazing find Visvirtusvoluntas,


I hope to get Yak-35 fighter project.

 

[hesham]

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.

 

[visvirtusvoluntas]

Great color drawing. The inscription reads: "Microfighter Yak-40 Jet Powered Zveno (Coupling) - Little known jet aircraft's project by Yakovlev"

 

[Stargazer]

Re: Yak-19

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.

A fabulous book indeed. Truly one of the highlights of the Red Star series.

 

[Petrus]

Re: Yak-19

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.
3- Definitive layout but Nene engine (not installed on the real thing).
4- Same layout but Lyul'ka TR-1 engine (same fate).
5- Yak-19 with Nene engine.
6- Yak-19 with Derwent engine.

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

What is the source of the drawings of Yak-19 early concepts? In the "Early Soviet Jet Fighters" by Yiefim Gordon there is no such drawings.

Piotr

 

[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]

Hi,

I know there was a Yakovlev Project derivative from Yak-36 as a Supersonic Fighter,powered
by two engines not one,and had no lift fan engines ?.

Here is also two Yakovlev projects,led to develop Yak-41 and supersonic Yak-38,but had
a lift engines.

http://www.paralay.com/lfsyak.html

 

[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