The steam locomotive BR 02 is a standardized ( Einheitslok ) German locomotive for working with long-distance passenger trains. When choosing a new type of locomotive, comparative tests were carried out between the BR 01 (two-cylinder) and BR 02 (four-cylinder) series. For this, ten prototypes of each type were built in 1925, and the numbers 02 001–02 010 were assigned to the BR 02 steam locomotives. The first eight BR 02 were built in 1925 by the Henschel factory, the other two in 1926 at the Maffei factory.
| BR 02 | |
|---|---|
| Production | |
| Country of construction |  Germany |
| Plants | Henschel , Maffei |
| Years of construction | 1925 - 1926 |
| Total built | ten |
| Numbering | 02 001-010 |
| Technical details | |
| Axial formula | 2-3-1 |
| Steam train length | 23 750 mm |
| Wheel diameter | 850 mm |
| Diameter of driving wheels | 2000 mm |
| Wheel diameter | 1250 mm |
| Track width | 1435 mm |
| The operating weight of the engine | 113.5 t |
| Steam train empty weight | 103.9 t |
| Adhesion weight | 60.3 t |
| Power | 1692 kW |
| Construction speed | 130 km / h forward tender - 50 km / h |
| The number of smoke pipes | 43 |
| Number of flame tubes | 129 |
| Superheater heating surface | 100.00 m² |
| Grate area | 4.41 m² |
| Number of cylinders | four |
| Piston stroke | 660 mm |
| Fuel supply | 10 t |
| Exploitation | |
| A country | Germany |
Due to the unsuccessful design, the four-cylinder engine could develop high power only at speeds above 70 km / h. In addition, at pressures below 1000 psi, the steam flow rate was greater than that of BR 01.
Compared to BR 01, they had a more complex structure, difficult to repair and manage, so their release was discontinued. From 1937 to 1942, these steam locomotives were successfully converted into two-cylinder BR 01 and received the designation 01 011 and 01 233 - 01 241.
The first 8 locomotives were equipped with 4-axis tenders of type T 30, the remaining 2 tenders of T 32. Later, all tenders were replaced with T 32.