Belyayev DB-LK long-range bomber

[Taranov]

As a add-on - DB-LK long-range bomber

Source: Aviation & Time 2008-04

 

[Taranov]

DB-LK, post 2
Source: Aviation & Time 2008-04

 

[Taranov]

DB-LK, post 3
Source: Aviation & Time 2008-04

 

[Stargazer]

Topic split from another thread. Here is a page taken from Samolyete Strane Sovyetov:

 

[hesham]

Also from Le FANA 498.

 

[blackkite]

Hi!
http://aviadejavu.ru/Site/Crafts/Craft20498.htm

http://www.airwar.ru/enc/bww2/dblk.html

http://translate.google.fr/translate?hl=fr&sl=ru&tl=en&u=http%3A%2F%2Fwww.airwar.ru%2Fenc%2Fbww2%2Fdblk.html&sandbox=1

 

[Avimimus]

Questions:

- Can anyone confirm the designation/name of the dive bomber version?

- I assume the later versions only had one elevator?

- The canard: Was the canard used only for trim? Or for recovery from a diving attack? Or was it used like a normal elevator?

Thanks,

 

[borovik]

- Project (10.1940) had intrafactory numerical designation - "360", was also used as the name of the "new DB-LK" or "PB-LK" - "ПБ-ЛК" Пикирующий Бомбардировщик - Летающее Крыло - Dive Bomber - Flying Wing
- I agree
- It's not exactly "canard" ...
to improve the aerodynamic characteristics used for take off and landing to increase the lift of the wing and the critical angle of attack, as well as in flight to improve maneuverability characteristics. Three other configurations of this project was a classic slat of the center wing.
see : http://www.secretprojects.co.uk/forum/index.php/topic,10549.0/all.html Reply #13

 

[Avimimus]

Thank you Borovik!

I thought so.

It looks like the 'canard' fore-wing was planned to be adjustable?

 

[blackkite]

DB-LK model and BP-3 glider 1/2 model.
http://live.warthunder.com/post/529542/en/
http://www.secretprojects.co.uk/forum/index.php/topic,13296.0.html
http://orionis1.free.fr/planeur/index_planeur.html
http://www.retroplane.net/forum/viewtopic.php?t=2286

And information.
https://www.warbirdsforum.com/topic/865-got-the-belyaev-db-lk/
http://www.dieselpunks.org/profiles/blogs/s-a-m-27-butterfly-wing

https://www.youtube.com/watch?v=TlYt1AZoQqw

https://www.youtube.com/watch?v=DX8aDmfMT3k

 

[blackkite]

Hi!
The wind tunnel test model of the DB-LK dive variant with the central cockpit of the pilot
http://www.secretprojects.co.uk/forum/index.php?action=dlattach;topic=17088.0;attach=202372;image

https://military.wikireading.ru/8054

"Gradually it became clear that it would be necessary to build a completely new aircraft, and to orient it to install one of the most real engines: M-81, AM-35 TK-2 or M-120. However, the requirements of customers continued to increase. In particular, the military offered to make the bomber dive, and put the pilot in the central cabin. As a result, the appearance of the car that received the factory designation "360" or "new DB-LK" has changed significantly. The pilot's cabin moved to the center wing in the form of a separate streamlined gondola. Four versions of models of such a cabin were investigated in the TsAGI T-2 wind tunnel. Aerodynamic experiments and various variants of takeoff and landing mechanization were exposed. As a result, it was decided to install the slats along the entire span of the wing and additionally in the space between the fuselages. The bent wing tips for stiffness at the dive exit were cut off, the air arrows, one of which was to perform the duties of the navigator, received streamlined individual lanterns to improve the view. "

borovik-san's surprising contribution.
http://www.secretprojects.co.uk/forum/index.php?action=dlattach;topic=10549.0;attach=174862;image

 

[blackkite]

Hi! Belyayev Babochka(Беляыев Бабочка). Baochka means butterfly.
https://en.wikipedia.org/wiki/Belyayev_Babochka

"Development
Viktor Nikolayevich Belyayev had an illustrious early career with TsAGI, AVIAVnito, Aeroflot, OMOS, AGOS, KOSOS and the Tupolev OKB. He also designed and built several gliders from 1920, including flying wing designs.
Belalyev and V.I. Yukharin, at the Kazan Aviation Institute (KAI), designed a tandem seat single engined research aircraft to investigate the properties of Belyayev's forward swept wing with raked tips, used on the Belyayev DB-LK, particularly the resistance to structural instability and aileron reversal. The aircraft was to have had quite sharply swept forward inner wings, with the outer third swept back at a similar angle, all with ailerons, except for flaps on the inner half of the inner wings. Relatively small tail surfaces were envisioned at the end of a relatively long fuselage. The pilot and observer sat in enclosed cockpits, with the observer's cockpit halfway between the pilot's cockpit and the tail unit. Further work on the Babochka was abandoned after the German invasion.
"Specifications
Data from Gunston, Bill. "Encyclopaedia of Russian Aircraft 1875–1995". London:Osprey. 1995. ISBN 1-85532-405-9
General characteristics
Crew: 2
Length: 6.84 m (22 ft 5-1/4 in)
Wingspan: 10.8 m (35 ft 5-1/4 in)
Height: 3.65 m (11 ft 11-3/4 in)
Wing profile: max speed
Empty weight: 680 kg (1,499 lb)
Gross weight: 1,928 kg (4,250 lb)
Powerplant: 1 × MV-6, 201.34 kW (270 hp)
Performance
Maximum speed: 510 km/h (317 mph)"

Russian site.
http://alternathistory.com/babochka-belyaeva-eksperimentalnyi-samolet-uk-1-proekt-belyaeva-1938g
Soviet X-planes.
https://issuu.com/jeanlulu/docs/-aviation--soviet-x-planes--yefim-gordon---bill-gu/22

 

[Avimimus]

The BP-3 had two control surfaces on each wing - does anyone know what they were (ailerons, flaps?)?

The BP-2 appears to have four moving control surfaces on each wing?

 

[hesham]

Hi Avimimus,I will search for you about the answer,

my dear Blackkite,you mixed the papers,the Belyayev PBI is not belonged to here,but
for this topic;

http://www.secretprojects.co.uk/forum/index.php/topic,10549.msg308624.html#msg308624

 

[Tonton-42]

DB-LK model and BP-3 glider 1/2 model.

Waaaa ...

Tonton