The Fairbanks-Morse 38D8-1/8 diesel engine typically produces 1,500 Brake Horsepower (BHP) when operating on the surface and 1,335 BHP while snorkeling. These figures represent the engine's robust output under different operational conditions, showcasing its adaptability as a power unit.
Engine Power Output Specifications
The Fairbanks-Morse 38D8-1/8 is a highly capable engine, renowned for its application in diesel-electric submarines as a primary power source for propulsion and charging batteries. Its power output varies depending on the operational environment, specifically whether the vessel is surfaced or submerged (snorkeling).
Here's a detailed breakdown of its power characteristics:
| Operating Condition | Brake Horsepower (BHP) | RPM | Airflow (CFM) |
|---|---|---|---|
| Surfaced | 1,500 BHP | 850 | 6,200 CFM |
| Snorkeling | 1,335 BHP | 800 | 5,850 CFM |
- Surfaced Operation: When a submarine is operating on the surface, the engine has unrestricted access to atmospheric air, allowing it to achieve its maximum output of 1,500 BHP at 850 RPM, supported by a significant airflow of 6,200 cubic feet per minute (CFM). This power is crucial for high-speed surface travel or rapid battery charging.
- Snorkeling Operation: During snorkeling, the engine draws air through a mast that extends above the water's surface. This method, while allowing for submerged battery charging and propulsion, often introduces some airflow restriction. Consequently, the engine's output slightly decreases to 1,335 BHP at a lower RPM of 800, with a corresponding airflow of 5,850 CFM. This mode balances stealth with power generation.
The Fairbanks Morse 38D8-1/8 diesel engine is recognized for its vertical, opposed-piston design, which contributes to its compact size and high power-to-weight ratio, making it an ideal choice for demanding applications where space and efficiency are critical. Its versatility extends beyond submarines, finding use in various naval and industrial applications where reliable and powerful diesel engines are required. For more details on this versatile powerhouse, you can refer to insights on its design and applications here.
