Definition
The Mikulin M-17 is a Soviet V‑12, liquid‑cooled aircraft piston engine developed in the 1930s. It is a licensed production variant of the German BMW VI engine, adapted and manufactured by the Soviet design bureau of Alexander Mikulin.
Overview
The M-17 entered service in the early 1930s and powered a range of Soviet aircraft, most notably the Tupolev TB‑3 bomber, the Ilyushin DB‑3, and various training and transport types. Production was carried out at several Soviet factories, including the GAZ‑124 (Moscow) and the Kirov Plant (Leningrad). The engine contributed significantly to the modernization of the Soviet Air Force during the interwar period and remained in limited use throughout World War II for auxiliary and training roles.
Etymology/Origin
The designation “M‑17” follows the naming convention of Mikulin’s design bureau, where “M” stands for Mikulin, the chief designer, and “17” indicates the model sequence. The engine is fundamentally a reverse‑engineered and locally produced copy of the German BMW VI, a 12‑cylinder, water‑cooled aircraft engine introduced in the late 1920s. Licensing agreements enabled Soviet engineers to acquire technical drawings and production techniques, which were then adapted to Soviet manufacturing standards.
Characteristics
| Feature | Specification |
|---|---|
| Configuration | 60° V‑12, liquid‑cooled |
| Displacement | Approximately 45.8 L (2 800 in³) |
| Rated Power | 730 hp (≈ 540 kW) at 1 800 rpm (typical for early variants) |
| Compression Ratio | 6.0 : 1 (early models) |
| Weight (dry) | ~530 kg (1 170 lb) |
| Fuel System | Carburetor with dual‑float chambers |
| Cooling System | Pressurized water circulation with a frontal radiator |
| Propeller Drive | Direct drive, clockwise rotation (as seen from the cockpit) |
| Variants | M‑17V (improved version with higher rpm), M‑17F (marine adaptation) |
The M‑17 incorporated several modifications compared to the original BMW VI, including strengthened crankcase castings, locally sourced materials for pistons and valves, and adjustments to the carburetion system to suit Soviet fuel qualities.
Related Topics
- Alexander Mikulin – Soviet aircraft engine designer and chief architect of the M‑17 series.
- BMW VI – German aircraft engine on which the M‑17 was based.
- Tupolev TB‑3 – Heavy bomber that extensively employed the M‑17.
- Ilyushin DB‑3 – Long‑range bomber powered in early production batches by the M‑17.
- Soviet aircraft engine development – Broader context of aviation propulsion in the USSR during the 1930s–1940s.