Stal-5 KhB as a chemical fighter

hesham

ACCESS: USAP
Senior Member
Joined
May 26, 2006
Messages
28,125
Reaction score
5,638
Hi,

the Stal-5 KhB was developed from Stal-5 as chemical fighter for
spraying was gases,has anyone a drawing to it ?.
 

redstar72

Soviet Aviation enthusiast
Senior Member
Joined
Jun 7, 2009
Messages
519
Reaction score
71
Hmm... As I can see, such a version of the Stal-5 is mentioned only by foreign sources (especially B. Gunston's encyclopedia which I myself have never seen, but Wikipedia etc. refer on it). In all Russian sources, the Stal-5 project is mentioned only as a 18-seat flying wing airliner. And that is not only in Shavrov's book first published in 1969 (see http://www.eroplan.boom.ru/shavrov/chr10/civil/putilov.htm), but also in "100-year-long Flying Wing History" by Dmitry Sobolev, published in 1998.

The Stal-5 was projected by Alexander Putilov since 1933; in early 1934 (according to Shavrov) the mockup was approved and the wing spar for static stress tests was made. This spar featured with excellent quality and was even exhibited in Moscow Polytechnical Museum. Then it was decided, before construction of actual Stal-5 prototype, to test its unusual layout in flight. For this, the 1/4 scale piloted model was built and tested in 1935. But the results were not very exciting: the experimental aircraft appeared very stringent in control. The decision was that the airliner could not be safe enough, and the project was cancelled. Instead of it, Putilov created a single-engine, 5-seat Stal-11 with classic layout: http://www.dmitray.narod.ru/stal11.htm.

The Stal-5 resembled something like Burnelli without tail booms. Its wingspan was 23 m, wing area 120 m2. The aircraft was powered by two Mikulin AM-34F engines, 860/900 hp each. Empty weight was about 5500 kg, takeoff weight about 8000 kg. You can see a very rough 3-view at http://www.eroplan.boom.ru/shavrov/chr10/civil/putilov.htm.

Unfortunatley I haven't seen any photos or pictures of experimental Stal-5 piloted model, although it was really flown. But it's known that it wasn't a direct copy of its big brother: the wing trailing edge was almost straight, and the tail fins were mounted on the wingtips. The wingspan was 6 m, wing area 15 m2; engines were two 45-hp Salmsons.

Maybe Gunston confused the Stal-5 with Chizhevsky BOK-6 project? It was also a flying wing with two M-34 engines - but BOK-6 was a bomber. It also was never built, and I have no more info on this project. Maybe borovik knows anything more? ???
 

Retrofit

ACCESS: Top Secret
Joined
Feb 21, 2007
Messages
607
Reaction score
148
Hej All,

Is there effectivelly any more detail presently available on this Bok-6 tailless bomber project designed by Vladimir Antonovich CHIZHEVSKY.
Will love to see a 3V drawing...

Thanks in advance,

Philippe
 

borovik

ACCESS: Top Secret
Joined
May 5, 2007
Messages
792
Reaction score
153
Only my old and VERY speculative drawings.
Philippe, in the afternoon, check your mail.
 

Tophe

ACCESS: Top Secret
Joined
Feb 18, 2006
Messages
1,149
Reaction score
47
Website
cmeunier.chez-alice.fr
redstar72 said:
Hmm... As I can see, such a version of the Stal-5 is mentioned only by foreign sources (especially B. Gunston's encyclopedia which I myself have never seen, but Wikipedia etc. refer on it).
I have Bill Gunston's encyclopaedias (both Soviet then Russian aircraft) but there are no Stal nor Putilov chapters, which manufacturer's chapter should I check? (there is no index alas).
 

Retrofit

ACCESS: Top Secret
Joined
Feb 21, 2007
Messages
607
Reaction score
148
Hej Tophe,

Aleksander Ivanovitch Putilov was working for the OOS (Otdel Opytnogo Samolyetostroeniya / Section for experimental aircraft construction).
"Stal" seems to mean "Steel" in Russian.

Many thanks Borovik!

Philippe
 

Tophe

ACCESS: Top Secret
Joined
Feb 18, 2006
Messages
1,149
Reaction score
47
Website
cmeunier.chez-alice.fr
Thanks.
I confirm: in "the Osprey Encyclopedia of Russian Arcraft 1875-1995" by Bill Gunston (published 1995), page278:
Stal-5 - Impressive flying-wing schemed by A.I. Putilov in 33 to reach ultimate transport efficiency (...) Also planned KhB version (Khimichyeskii Boyevik, chemical fighter) for spraying war gases. (...) after some tinkering project abandoned.
 

hesham

ACCESS: USAP
Senior Member
Joined
May 26, 2006
Messages
28,125
Reaction score
5,638
Hi,

http://eroplany.narod.ru/shavrov/chr10/civil/putilov.htm
 

Attachments

  • Stal-5.jpg
    Stal-5.jpg
    10.7 KB · Views: 170
  • 12145453.jpg
    12145453.jpg
    24 KB · Views: 164

Similar threads

Top