81-740/741
81-740/741 (Rusich, Russian: Русич), is a type of rolling stock specially designed for running under the harsh winter climate of outdoor Moscow. Rusich also features a corridor connection, allowing passenger access between two contiguous cars. They are currently assigned to the metro lines including Sokolnicheskaya, Arbatsko-Pokrovskaya, Koltsevaya and Butovskaya lines of Moscow Metro, Kazan Metro and lines M1, M2 and M4 of the Sofia Metro in Bulgaria.
| 81-740/741 | |
|---|---|
 81-740.1/741.1 train | |
| In service | 2003-present |
| Manufacturer | Metrovagonmash (Russia) |
| Built at | Metrovagonmash (Russia) |
| Family name | 81-... |
| Replaced | 81-720/721 |
| Constructed | 2002-2013 (all modifications) |
| Entered service | 2003 |
| Capacity | 344/370 passengers (353/382 for .4(K) and .2B) |
| Operator(s) | Moskovsky Metropoliten Kazan Metro |
| Depot(s) | Moscow Metro: MPD-1 Severnoye MPD-3 Izmaylovo MPD-4 Krasnaya Presnya MPD-8 Varshavskoye MPD-16 Mitino Kazan Metro: Ametyevo Sofia Metro: Obelya Depot |
| Line(s) served | Moscow Metro: Sokolnicheskaya line Arbatsko–Pokrovskaya line Koltsevaya line Butovskaya lineSofia Metro: M1 M2 M4 Kazan Metro: All lines |
| Specifications | |
| Car length | 28.15 m (92 ft 4 1⁄4 in)/27.2 m (89 ft 2 7⁄8 in) |
| Width | 2.7 m (8 ft 10 1⁄4 in) |
| Height | 3.57 m (11 ft 8 1⁄2 in) |
| Articulated sections | Two sections per car |
| Maximum speed | 90 km/h (56 mph) |
| Weight | 47 t (46 long tons; 52 short tons)/46 t (45 long tons; 51 short tons) |
| Traction system | 4 AC asynchronous motors DATE-170-4U2 or TAD 280M4 U2 per 6-axle car |
| Power output | 680 kW (910 hp) |
| Acceleration | 1.3 m/s2 (4.3 ft/s2) |
| Deceleration | 1.1 m/s2 (3.6 ft/s2) |
| Electric system(s) | 825 V DC |
| Bogies | 3 two-axle bogies (2 motorized bogies) |
| Braking system(s) | Dynamic brakes (rheostatic and regenerative), electro-pneumatic |
| Coupling system | Scharfenberg coupler |
| Multiple working | Min 2x 81-740 car, max 81-740 + 3x 81-741 + 81-740 cars. Train + train configuration is not used in regular service. |
| Track gauge | 1,520 mm (4 ft 11 27⁄32 in) Russian gauge 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
Currently, there are four types of Rusich rolling stock: 81-740/741, 81-740.1/741.1; 81-740.4/741.4 which are used in Moscow Metro, and 81-740.2/741.2, 81-740.2B/741.2B which is technically adapted and designed for Sofia Metro.
Its automatic train operation and universal control panel were designed by Tikhomirov Scientific Research Institute of Instrument Design (NIIP).
