Yakovlev AIR "Proyekt N°2"

[ucon]

AIR project from year 1933

 

[igor-mich]

I've seen mention of this project dvigadelem MV-6. What kind of engine was installed in this picture.

 

[Stargazer]

AIR project from year 1933

Other pictures of this design, only described as "Proyekt N°2", can be found at http://www.spaceavia.ru/

I must say I'd love to learn more on this superb project! Please note the different engine cowling and air intakes.

 

[Hood]

There is mention of this project in the book 'OKB Yakovlev' by Yefim Gordal et al but with no further information other than a breif description and no drawing.
At least you work has given us that. I assume the engine is an MV-6.

 

[Vahe Demirjian]

There is mention of this project in the book 'OKB Yakovlev' by Yefim Gordal et al but with no further information other than a breif description and no drawing.
At least you work has given us that. I assume the engine is an MV-6.

Specifications for Yakovlev AIR No. 2:

• Length: 21 feet 8 in (6.6 meters)
• Wingspan: 36 feet 1 in (11 meters)
• Wing area: 165.35 sq feet (15.36 sq meters)
• Empty weight: 772 pounds (350 kg)
• Useful load: 529 pounds (240 kg)
• Aspect ratio: 8.1
• Powerplant: one 60 hp Walter 5-cylinder radial engine

The 1933 design by Yakovlev discussed in this thread was a different design than AIR No.2 and had an inline engine (probably a Renault Bengali).

Source:
Gordon, Yefim; Komissarov, Sergey (2013). Unflown wings: Soviet and Russian unrealized aircraft projects 1925-2010. Birmingham: Ian Allan Publishing Ltd. pp. 263-264. ISBN 978-1906537340.

 

[riggerrob]

ucon's picture looks like it is powered by an air-cooled, two or three cylinder radial engine. Either an upright V-twin or with a third cylinder hanging straight down.

OTOH Stargazer2006's drawing looks more like a conventional, air-cooled, straight, 4-cylinder, inverted, inline engine.

 

[FXXII]

A central under carriage, but no wingtip supporting wheels, so how did it take off, with one wingtip on the ground? It would only make a ground loop when applying power.

 

[riggerrob]

A central under carriage, but no wingtip supporting wheels, so how did it take off, with one wingtip on the ground? It would only make a ground loop when applying power.

Civilian sport gliders routinely have a person steadying a wing tip until they are going fast enough to use ailerons for roll control. Since this Russian race plane is purely intended for racing or record-setting it is okay to depend upon extra ground crew.

 

[FXXII]

OK. On the other hand gliders and motor gliders will be able to use ailerons at very low speed, i.e. some 10 km/hr, the running speed of a tip handler. I hate to think what would happen with a racer, which it apparantly is, on a runway with a spinning 60 hp propeller if the tip handler makes a mistake. Also, it would probably need more than 10 km/hr for the ailerons to be effective in view of the relatively short wingspan.