| Technical data | |
|---|---|
| Type | Dubler TB-1 /ANT-4-bis (Pre-production Prototype) |
| Function | Bomber prototype |
| Year | 1929 |
| Crew | 6 |
| Engines | 2*500/680hp BMW-VI |
| Length | 18.00m |
| Wingspan | 28.7m |
| Wing area | 120.0m2 |
| Empty weight | 4432kg |
| Loaded weight | 6722kg |
| Wing Load (kg/m2) | 56.0 |
| Power load (kg/hp) | 4.94/6.72 |
| Speed at 0m | 202km/h |
| Speed at 3000m | 156km/h |
| Landing Speed | 85km/h |
| Landing Roll | 170m 15sec |
| Takeoff Roll | 200m 16sec |
| Turn time | 31sec |
| Ceiling | 4700m |
| Climb | |
| 1000m | 5.5min |
| 2000m | 11.9min |
| 3000m | 19.5min |
| 4000m | 29.3min |
| Armament | |
| Guns | 6*7.62mm DA-2 |
| Bombs | 1000kg inside |
Dubler TB-1(ANT-4)-bis by A.N.Tupolev
Pre-production TB-1 with BMV-VI engines was ready in July 1929. Trial program was fulfilled on October 19 without any problems, and mass production started. Now it was fully armed bomber with 3 DA-2 twin-machinegun turrets, men crew and 1000kg internal bombload.
During Winter 1929- 1930 series of flights with variety of payloads were performed (pilots M.M.Gromov, P.M.Stefanovskij, A.B.Yumashev).
| Predecessors | Modifications |
|---|---|
| TB-1/ANT-4 Dubler |
 TB-1/ANT-4 Series |
| References | Links |
|---|---|
|
|
