| Technical data | ||
|---|---|---|
| Type | ANT-40.1 | ANT-40.2 |
| Function | Bomber | |
| Year | 1934 | |
| Crew | 4 | |
| Engines | 2*730hp Wright 'Cyclone' | 2*760hp Hispano-Suiza 12Y |
| Length | 12.30m | 12.17m |
| Wingspan | 19.00m | 20.30m |
| Wing area | 46.3m2 | 51.9m2 |
| Empty weight | 3132kg | - |
| Loaded weight | 4717kg | 4850kg |
| Maximum weight | - | 5350kg |
| Wing Load (kg/m2) | 102 | 93.4 |
| Power load (kg/hp) | 3.2 | |
| Speed (0m) | - | 332km/h |
| Speed (4000m) | 325km/h | - |
| Speed (5000m) | - | 404km/h |
| Climb (5000m) | - | 9.4min |
| Ceiling | 6800m | 9400m |
| Armament | ||
| Guns | 4*mg 7.62mm ShKAS | |
| Bombs | 2*250kg or 6*100kg | |
ANT-40.1/ANT-40-2RTs, ANT-40.2/ANT-40-2IS A.A.Arhangelsky/ A.N.Tupolev
|
The first version of the SB bomber. It was slightly smaller than following series aircraft and was powered with Wright 'Cyclone' radials.
Rolled out of factory in October 1934. When restored after crash-landing on October 31 ANT-40.1 became a testbed for new technologies, including retractable ski gear. Second round of the factory trials took place in February 5 - July 31 1935. Wing are was decreased (while the span remained the same).
It did not became a series aircraft because the ANT-40.2 with Hispano-Suiza 12Y was considered more promising.
ANT-40.2 (SB-IS, where IS stays for Russian spelling of Hispano-Suiza) was finished at the very end of 1934 (or January 15 1935??) , and during flight tests in January 1935 speed 430km/h was demonstrated.
It was the first Soviet aircraft to be equipped with weight-compensated elevones. After minor changes (engines moved forward by 10cm, wing leading edge sweep increased from 4.5° to 9°) aircraft was adopted as a base for mass production series.
The SB series became a major bomber of the Red Army Airforce for next 5 years, used in several wars: clashes with Japanese on Mongolian border, Spanish War, Winter War, Great Patriotic War (WWII).
See related aircraft on the Main SB page;
References:
- "History of aircraft construction in the USSR", Vol.2 p.12-13
- ANT-40 / SB-2 at the Virtual Aircraft Museum
- ANT-40, Tupolev
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