Zavod 39 (TsKB-) designations
- Thread starter Maveric
- Start date
I found a small problem in the book of Maslov "Lost Victories Soviet aviation":
1) TsKB-5 - this Polikarpov LSch designer? or will be properly BOK-2 (RK) structures Krichevsky.
2) TsKB-9 - DI-3 is a Polikarpov Grigorovich? or will be properly BOK-3 (IC) design Tsebrikova.
Which statement is correct, the book is Maslov designation BOK-2 (TsKB-5) and BOK-3 (TsKB-9)
And who estli photo or 3 types of BOK-2 will be very grateful.
1) TsKB-5 - this Polikarpov LSch designer? or will be properly BOK-2 (RK) structures Krichevsky.
2) TsKB-9 - DI-3 is a Polikarpov Grigorovich? or will be properly BOK-3 (IC) design Tsebrikova.
Which statement is correct, the book is Maslov designation BOK-2 (TsKB-5) and BOK-3 (TsKB-9)
And who estli photo or 3 types of BOK-2 will be very grateful.
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Hi all!
Dear Maveric, there is some confusion in your table. Firstly, the title is wrong - it would be simply TsKB list, not TsAGI TsKB. None of the mentioned aircraft wasn't created by TsAGI TsKB - some of them were before, and most of them were after
. The TsAGI TsKB existed only short time (since August 27, 1931 to May 1932 - see http://www.secretprojects.co.uk/forum/index.php/topic,10640.0.html), and during that time all projects were labeled "ANT"... Then, you mixed two TsKB eras: the first one (from December 1929 when TsKB was organized at Zavod No.39 till the "marriage" with TsAGI on August 27, 1931) when TsKB was ruled by Nikolai Paufler, and the second era after TsKB rebirth on January 13, 1933 when its head was Sergei Ilyushin. This is the reason for some "double" designations. (Actually they aren't double because the designations of the first TsKB weren't "TsKB-X", but "Aircraft No.X of TsKB schedule" - "Самолёт № Х по плану ЦКБ").
Here is my attempt of TsKB list. The aircraft marked out with Bold Italic font were built in series:
The first era (XII.1929 - VIII.1931) – only some numbers are known:
No.5 – Kocherigin LSh (ЛШ) attack biplane (not finished)
No.6 – Kocherigin TSh-1 armoured attack biplane (Probably TSh-1 is wrong designation. Some documents mean it as “TSh-2 first version”; according to those, TSh-1 was Tupolev ANT-17 project known also as the TSh-B).
No.7 – Grigorovich I-Z fighter
No.8 – Grigorovich TB-5 heavy bomber
No.9 – DI-3 two-seat fighter
No.10 – R-5a (MR-5) float version of Polikarpov R-5. (Not U-2M / MU-2!)
No.11 – Chetverikov MDR-3 flying boat
No.21 – Kocherigin TSh-2 (or “TSh-2 second version)
No.23 – Kocherigin ShON carrier-based attack biplane
No.25 – Beriev MBR-2 flying boat
The second era (since 1933):
TsKB-1– Kocherigin LR recon aircraft
TsKB-2 – real double designation: firstly Kocherigin DI-5 two-seat fighter (project only), later reassigned to Chizhevsky SS stratospheric aircraft (BOK-1).
TsKB-3 – Polikarpov I-15 fighter
TsKB-4– Kocherigin/Gurevich TSh-3 attack aircraft
TsKB-5 – Krichevsky RK / BOK-2 experimental aircraft with slotted wing
TsKB-6 – Ilyushin, 6-seat passenger/utility aircraft (project only)
TsKB-7 - ?
TsKB-8 - ?
TsKB-9 – Tsebrikov BOK-3 utility/liaison aircraft
TsKB-10 – Cheranovsky BICh-14 “Parabola” tailless experimental/passenger aircraft
TsKB-11– Kocherigin/Yatsenko DI-6 two-seat fighter
TsKB-12 – Polikarpov I-16 fighter
TsKB-13 – Chizhevsky BOK-5 / LK M-11 experimental tailless aircraft
TsKB-14 – Polikarpov DI-7 two-seat fighter (I-17 derivative, project only)
TsKB-15 – Polikarpov I-17 fighter (first prototype)
TsKB-16 – Samsonov MBR-5 flying boat (later TsKB MS-2)
TsKB-17 – Chizhevsky BOK-6 / LK 2M-34 tailless twin-engine bomber (project only)
TsKB-18 – Polikarpov I-16Sh (I-16 attack version, M-22 engine, fixed landing gear)
TsKB-19 – Polikarpov I-17 fighter (second prototype)
TsKB-19bis – Polikarpov I-17 fighter (third prototype, with motor-cannon)
TsKB-20 - ?
TsKB-21 – Polikarpov SI fighter/speed record aircraft (twin-boom pusher, coupled engine, project only). According to some sources, it was used as a base for Beriev B-10 project.
TsKB-22 - ?
TsKB-23 – experimental aircraft with slotted wing (project only)
TsKB-24 - ?
TsKB-25 – Polikarpov I-19. There were two totally different projects under this designation. The first one was I-16 derivative for Gnome-Rhone Mistral Major (M-85) engine (kind of I-180 precursor; some sources also proclaim it a base for infamous Silvansky I-220). It was projected in mid-1935 but soon cancelled, and the designation was re-used for I-17 version with Mikulin M-34 engine.
TsKB-26 – Ilyushin experimental bomber (BB-2, SB-39) – DB-3 first prototype.
TsKB-27 – Kocherigin SR, R-9 recon aircraft.
TsKB-28 – Polikarpov I-20 – fighter project of I-17 family, with HS 12Ybrs engine (no more info).
TsKB-29 – modified I-16 with Wright Cyclone F-54 engine and redesigned landing gear (project only).
TsKB-30 – Ilyushin DB-3 long-range bomber
TsKB-31 - ?
TsKB-32 – Ilyushin I-21 fighter (first prototype: M-34FRN engine, 4xShKAS, evaporative cooling system)
TsKB-33 – Polikarpov I-18 (I-17 version with evaporative cooling system). Uncompleted.
TsKB-34 to 37 - ?
TsKB-38 – Kocherigin DI-6Sh (DI-6 attack version)
TsKB-39, 40 - ?
TsKB-41 – Kocherigin DI-6 single-seat version (project only)
TsKB-42 - ?
TsKB-43 – Polikarpov I-18bis: TsKB-33 with smaller wing, for speed record attempt. Project only.
TsKB-44 – I-16 modification with Wright Cyclone F-54 engine and 4x ShKAS. Project only (1935). Probably later reassigned to Polikarpov MPI-1 / VIT-1.
TsKB-45 to 47 - ?
TsKB-48 – Polikarpov VIT-2 attack / bomber / anti-tank aircraft
TsKB-49 to 50 – ?
TsKB-51 – Ilyushin DB-3TP torpedo bomber seaplane (on floats).
TsKB-52 – Ilyushin I-21 second prototype (AM-35 engine, 2x ShVAK cannons, normal cooling system). Was in construction in 1938-39. Most probably uncompleted.
TsKB-53 – Ilyushin DB-3T torpedo bomber
TsKB-54 – Ilyushin DB-3SS escort aircraft (aka “DB-3 cruiser”)
TsKB-55 – Ilyushin BSh-2 first prototype (Il-2 precursor): AM-35A engine, two-seat
TsKB-56 – Ilyushin DB-4 long-range bomber
TsKB-57 – Ilyushin BSh-2 second prototype (AM-38 engine, single-seat)
TsKB-58, 59 – ?
TsKB-60 – Ilyushin Il-6 2AM-38, twin-engine attack aircraft. Project only. The last design under “TsKB” index.
Dear Maveric, there is some confusion in your table. Firstly, the title is wrong - it would be simply TsKB list, not TsAGI TsKB. None of the mentioned aircraft wasn't created by TsAGI TsKB - some of them were before, and most of them were after
. The TsAGI TsKB existed only short time (since August 27, 1931 to May 1932 - see http://www.secretprojects.co.uk/forum/index.php/topic,10640.0.html), and during that time all projects were labeled "ANT"... Then, you mixed two TsKB eras: the first one (from December 1929 when TsKB was organized at Zavod No.39 till the "marriage" with TsAGI on August 27, 1931) when TsKB was ruled by Nikolai Paufler, and the second era after TsKB rebirth on January 13, 1933 when its head was Sergei Ilyushin. This is the reason for some "double" designations. (Actually they aren't double because the designations of the first TsKB weren't "TsKB-X", but "Aircraft No.X of TsKB schedule" - "Самолёт № Х по плану ЦКБ").Here is my attempt of TsKB list. The aircraft marked out with Bold Italic font were built in series:
The first era (XII.1929 - VIII.1931) – only some numbers are known:
No.5 – Kocherigin LSh (ЛШ) attack biplane (not finished)
No.6 – Kocherigin TSh-1 armoured attack biplane (Probably TSh-1 is wrong designation. Some documents mean it as “TSh-2 first version”; according to those, TSh-1 was Tupolev ANT-17 project known also as the TSh-B).
No.7 – Grigorovich I-Z fighter
No.8 – Grigorovich TB-5 heavy bomber
No.9 – DI-3 two-seat fighter
No.10 – R-5a (MR-5) float version of Polikarpov R-5. (Not U-2M / MU-2!)
No.11 – Chetverikov MDR-3 flying boat
No.21 – Kocherigin TSh-2 (or “TSh-2 second version)
No.23 – Kocherigin ShON carrier-based attack biplane
No.25 – Beriev MBR-2 flying boat
The second era (since 1933):
TsKB-1– Kocherigin LR recon aircraft
TsKB-2 – real double designation: firstly Kocherigin DI-5 two-seat fighter (project only), later reassigned to Chizhevsky SS stratospheric aircraft (BOK-1).
TsKB-3 – Polikarpov I-15 fighter
TsKB-4– Kocherigin/Gurevich TSh-3 attack aircraft
TsKB-5 – Krichevsky RK / BOK-2 experimental aircraft with slotted wing
TsKB-6 – Ilyushin, 6-seat passenger/utility aircraft (project only)
TsKB-7 - ?
TsKB-8 - ?
TsKB-9 – Tsebrikov BOK-3 utility/liaison aircraft
TsKB-10 – Cheranovsky BICh-14 “Parabola” tailless experimental/passenger aircraft
TsKB-11– Kocherigin/Yatsenko DI-6 two-seat fighter
TsKB-12 – Polikarpov I-16 fighter
TsKB-13 – Chizhevsky BOK-5 / LK M-11 experimental tailless aircraft
TsKB-14 – Polikarpov DI-7 two-seat fighter (I-17 derivative, project only)
TsKB-15 – Polikarpov I-17 fighter (first prototype)
TsKB-16 – Samsonov MBR-5 flying boat (later TsKB MS-2)
TsKB-17 – Chizhevsky BOK-6 / LK 2M-34 tailless twin-engine bomber (project only)
TsKB-18 – Polikarpov I-16Sh (I-16 attack version, M-22 engine, fixed landing gear)
TsKB-19 – Polikarpov I-17 fighter (second prototype)
TsKB-19bis – Polikarpov I-17 fighter (third prototype, with motor-cannon)
TsKB-20 - ?
TsKB-21 – Polikarpov SI fighter/speed record aircraft (twin-boom pusher, coupled engine, project only). According to some sources, it was used as a base for Beriev B-10 project.
TsKB-22 - ?
TsKB-23 – experimental aircraft with slotted wing (project only)
TsKB-24 - ?
TsKB-25 – Polikarpov I-19. There were two totally different projects under this designation. The first one was I-16 derivative for Gnome-Rhone Mistral Major (M-85) engine (kind of I-180 precursor; some sources also proclaim it a base for infamous Silvansky I-220). It was projected in mid-1935 but soon cancelled, and the designation was re-used for I-17 version with Mikulin M-34 engine.
TsKB-26 – Ilyushin experimental bomber (BB-2, SB-39) – DB-3 first prototype.
TsKB-27 – Kocherigin SR, R-9 recon aircraft.
TsKB-28 – Polikarpov I-20 – fighter project of I-17 family, with HS 12Ybrs engine (no more info).
TsKB-29 – modified I-16 with Wright Cyclone F-54 engine and redesigned landing gear (project only).
TsKB-30 – Ilyushin DB-3 long-range bomber
TsKB-31 - ?
TsKB-32 – Ilyushin I-21 fighter (first prototype: M-34FRN engine, 4xShKAS, evaporative cooling system)
TsKB-33 – Polikarpov I-18 (I-17 version with evaporative cooling system). Uncompleted.
TsKB-34 to 37 - ?
TsKB-38 – Kocherigin DI-6Sh (DI-6 attack version)
TsKB-39, 40 - ?
TsKB-41 – Kocherigin DI-6 single-seat version (project only)
TsKB-42 - ?
TsKB-43 – Polikarpov I-18bis: TsKB-33 with smaller wing, for speed record attempt. Project only.
TsKB-44 – I-16 modification with Wright Cyclone F-54 engine and 4x ShKAS. Project only (1935). Probably later reassigned to Polikarpov MPI-1 / VIT-1.
TsKB-45 to 47 - ?
TsKB-48 – Polikarpov VIT-2 attack / bomber / anti-tank aircraft
TsKB-49 to 50 – ?
TsKB-51 – Ilyushin DB-3TP torpedo bomber seaplane (on floats).
TsKB-52 – Ilyushin I-21 second prototype (AM-35 engine, 2x ShVAK cannons, normal cooling system). Was in construction in 1938-39. Most probably uncompleted.
TsKB-53 – Ilyushin DB-3T torpedo bomber
TsKB-54 – Ilyushin DB-3SS escort aircraft (aka “DB-3 cruiser”)
TsKB-55 – Ilyushin BSh-2 first prototype (Il-2 precursor): AM-35A engine, two-seat
TsKB-56 – Ilyushin DB-4 long-range bomber
TsKB-57 – Ilyushin BSh-2 second prototype (AM-38 engine, single-seat)
TsKB-58, 59 – ?
TsKB-60 – Ilyushin Il-6 2AM-38, twin-engine attack aircraft. Project only. The last design under “TsKB” index.
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Hi Stephane!
Maybe it would be better to remove "TsAGI" from the title at all. As I said, TsAGI has no real connection with the matter of this topic: moreover, TsKB of Zavod 39 can be considered the main rival of KOSOS TsAGI (ANT).
Maybe it would be better to remove "TsAGI" from the title at all. As I said, TsAGI has no real connection with the matter of this topic: moreover, TsKB of Zavod 39 can be considered the main rival of KOSOS TsAGI (ANT).
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redstar72 said:
My dear Redstar,
what was this aircraft and from which company ?,I only find an Info about it here;
https://books.google.com.eg/books?id=A6rdCwAAQBAJ&pg=PT64&lpg=PT64&dq=%D0%A6%D0%BA%D0%B1-23+%D1%81%D0%B0%D0%BC%D0%BE%D0%BB%D0%B5%D1%82&source=bl&ots=EdzC_Axtf6&sig=_64SjDiU2_EZo88XQvVpCzAfMQc&hl=ar&sa=X&ved=0ahUKEwj6o_6nxd_MAhVE2xoKHU-gCDcQ6AEIUDAH#v=onepage&q=%D0%A6%D0%BA%D0%B1-23%20%D1%81%D0%B0%D0%BC%D0%BE%D0%BB%D0%B5%D1%82&f=false
Really TsKB started in february 1930 and worked on the following planes
- Polikarpov I-5
– Grigorovich LSh-M-17 (ЛШ) attack biplane (was transfered into TSh-2)
– Grigorovich TSh-2M-17 armoured attack biplane (TSh-1 was Tupolev project).
- Grigorovich DI-3M-17 two seat fighter
- Grigorovich ShON-M-17
– Grigorovich I-Z fighter No.7
– Grigorovich TB-5 heavy bomber
Fragment of report from June 1931
- Polikarpov I-5
– Grigorovich LSh-M-17 (ЛШ) attack biplane (was transfered into TSh-2)
– Grigorovich TSh-2M-17 armoured attack biplane (TSh-1 was Tupolev project).
- Grigorovich DI-3M-17 two seat fighter
- Grigorovich ShON-M-17
– Grigorovich I-Z fighter No.7
– Grigorovich TB-5 heavy bomber
Fragment of report from June 1931
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hesham said:
The designation TsKB-23 in inserted text doesn't refer to any aircraft but to the TsKB 23 ( Central Design Bureau No. 23 ) being under control of the NKVD,
where Petlakov's designers group worked on high ceiling heavy fighter VI-100.
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From Aviation magazine 1956,of course it was a Project only,
the DI-7,
The 1936 DI-7 is the last two-seat fighter, built in U.R.S.S. Like the DI-6, it is a
sesquiplane single engine with train retractable. No details, no illustration have
not been published on this device whose maximum speed is given for 400 km.h.
(249 mph.)
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I assume they meant the last single-engined Soviet 2-seat fighter. Other sources say, as redstar72 did, that the TsKB-14 (DI-7) project relates directly to the single-seat TsKB-15 (I-17) monoplane fighter rather sharing a layout with the sequiplane Kochyerigin DI-6.
Since the TsKB-14 dates to the second half of 1933 like the TsKB-15, that suggests that the two Polikarpov fighter types were being developed in parallel. Presumably, the TsKB-14 began as a simple, 2-seat variant powered by an M-17 (or M-34?) V-12. But there are references to a later-stage development with tandem engines driving coaxial contra-rotating propellers. The latter sounding very much like the built Bolkhovitinov Sparka.
Since the TsKB-14 dates to the second half of 1933 like the TsKB-15, that suggests that the two Polikarpov fighter types were being developed in parallel. Presumably, the TsKB-14 began as a simple, 2-seat variant powered by an M-17 (or M-34?) V-12. But there are references to a later-stage development with tandem engines driving coaxial contra-rotating propellers. The latter sounding very much like the built Bolkhovitinov Sparka.
Aubi
ACCESS: Secret
The other way. TskB-8 was prototype designation for TB-5. TB-5, or Tyazholii bombardirovschchik 5, was the expected service designation.
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My dear Borovik,
do you know more about this Project ?,you talked about it
before;
"DI-7" fighter (two sitter, two engines M-100, variant I-17) by N.Polikarpov 1933-35
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@Antonio, the title still needs fixing!! ;-)
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Hi all,
The aircraft plant No.39 continued to use the digital sequence without "TsKB" at least until the evacuation to Irkustk, These are the known "izdelie" numbers.
izdelie 61 = MiG-1 & MiG-3
izdelie 62 = Polikarpov I-185
izdelie 63 = MiG-1 with AM-37 engine
izdelie 65 = MiG-9 (first)
izdelie 71 = MiG-5 (DIS-200)
izdelie 72 = MiG-7
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Trying to add to the TsKB- designations list is almost an impossible task, and for several reasons:
* Designations found only in a 2002 web page by J.M. Passieux saved onto my computer.
- There are two separate lists, and many sources get mixed up between the two.
- The TsKB- numbers were also often used to designate design bureaus, adding to the confusion.
- Aircraft in the first list are variously refered to as "Samolyet №", "izdeliye", "izdeliye №", "TsKB №" or "mashina №".
- It seems that not all designations were documented, and that some have been lost to history.
| First period |
| In Autumn 1929, Polikarpov, Grigorovich and others were imprisoned as traitors when they fail to deliver aircraft prototypes on deadline. However, work continued in prison as KB "VT", a special design bureau. Since their VT fighter was deemed better than the Tupolev one and impressed Stalin himself, the team was granted freedom, and a new bureau designated ЦКБ-39 ОГПУ (TsKB-39 OGPU) was organized at factory No.39 in December 1929 under the supervision of Nikolai Paufler. |
| DESIGN | CHIEF DESIGNER | TYPE (Cyrillic) | TYPE | YEAR | NOTES |
| № 1 | POLIKARPOV / GRIGOROVICH | И-5, БТ-11 | I-5, BT-11 | 1930 | (possibly for BT-12/-13 too) previously known as «izdeliye 29»; original plan has "Samolyet N°1" as title |
| № 2 | unknown | ||||
| № 3 ? | POLIKARPOV | У-2 | U-2 | 1931 | designation found but unconfirmed |
| № 4 | unknown | ||||
| № 5 | KOCHERIGIN | ЛШ(-1) | LSh(-1) | 1930 | attack biplane, not finished |
| № 6 | KOCHERIGIN | ТШ-1 | TSh-1 | 1930 | armored attack biplane |
| № 7 | GRIGOROVICH | И-Z (И-Зет) | I-Z | 1932-33 | cannon fighter |
| № 8 | GRIGOROVICH | ТБ-5 | TB-5 | 1930 | heavy bomber |
| № 9 | POLIKARPOV | ДИ-3 | DI-3 | 1930 | two-seat fighter, 1 built |
| № 10 | POLIKARPOV | Р-5а (МР-5) | R-5a (MR-5) | 1931 | float version of R-5 |
| № 11 | CHETVERIKOV | МДР-3 | MDR-3 | 1932 | flying boat, 1 built |
| № 12 | unknown | ||||
| № 13 | unknown | ||||
| № 14 | unknown | ||||
| № 15 | unknown | ||||
| № 16 | unknown | ||||
| № 17 | unknown | ||||
| № 18 | unknown | ||||
| № 19 | unknown | ||||
| № 20 | unknown | ||||
| № 21 | KOCHERIGIN | ТШ-2 | TSh-2 | armored attack biplane | |
| № 22 | unknown | ||||
| № 23 | KOCHERIGIN | ШОН | ShON | carrier-based attack biplane | |
| № 24* | KOCHERIGIN | ТШ-3 | TSh-3 | 1933 | armored attack biplane |
| № 25 | BERIEV | МБР-2 | MBR-2 | became MS-1, MR in another KB | |
| № 26 | unknown | ||||
| № 27 | unknown | ||||
| № 28* | SHAVROV | ФС-2 | FS-2 | ||
| № 29* | SHAVROV | ФС-1, Ш-5 | FS-1, Sh-5 | 1934 |
* Designations found only in a 2002 web page by J.M. Passieux saved onto my computer.
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| Second period | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
On 13th January 1933, TsKB TsAGI was reorganised as TsKB GUAP (Glavnoye upravleniye aviatsionnoy promyshlennosti, Chief Directorate of the Aviation Industry), often refered to simply as "TsKB", under Sergei Vladimirovich IIyushin, who was also involved in solving administrative issues in this bureau. Work was divided into several "brigades":
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(list continues in third post) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
NOTES: * Designations TsKB-7 and TsKB-8 are often found for the same aircraft as N°7 and N°8 of the first list. Although it is only a hypothesis, I have considered here that they may have been carried over from the other list as the projects were still alive. - In the same way that TsKB-38, -42 and -46 were used for TsKB-11Sh, -3RV and -12P, it seems highly likely to me that many of the missing numbers in the list were probably just paper designations for the I-15bis, I-15ter and so forth. They could also have been paper designations for the I-180, I-185 and several other aircraft developed during those years. |
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The TsKB-20 is something of a mystery:
- It is listed as a June 1934 project in a Soviet document entitled "1935 Aircraft industry: Fulfillment of plan: 1934 1935 1936" without any other piece of information: https://textarchive.ru/c-1962837-pall.html
- It is mentioned in passing in a 29 August 1937 Soviet newspaper as a "twin-engine aircraft": https://portal-kultura.ru/upload/iblock/b6c/1937.08.29.pdf
- It was presented in several model magazines in (Model Airplane News, Dec. 1938; Model Aircraft, Feb. 1955) as the "Russian I-18 fighter operated with the Spanish Government Air Force during the civil war." From the images provided, however, it is more likely that it was the I-16 Type 18 rather than the I-18.
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Also, I've just added to the list:
- the TsKB-31, mentioned on the Czech website Ruslet as being a projected development of the Kocherigin LR (TsKB-1): https://ruslet.webnode.cz/technika/ruska-technika/letecka-technika/kocerigin-s-a/lr-ckb-1/
- the TsKB-37, mentioned in the book Fighting Cockpits, by Donald Nijboer, as being the first Ilyushin Il-2: https://books.google.fr/books?id=ON0uDAAAQBAJ
- the TsKB-50, mentioned on a German website as a 1939 prototype of the Il-2: http://www.sepsy.de/rus-il2.htm
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The newspaper mentions a twin-engine aircraft TsKB-26 Ilyushin Design Bureau. Just because of the poor quality of the newspaper's photo, you thought it was TsKB-20
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