As a rule of thumb, what is the maximum depth of foundation in relation to engine stroke?

The maximum depth of the foundation in relation to the engine stroke is commonly referenced as a rule of thumb in machine design. The correct factor of 4.20 times the engine stroke serves as a guideline to ensure sufficient support and stability for the engine's loads and vibrations during operation. This factor is derived from empirical data and engineering practices that take into account various considerations such as dynamic loads, inertia, and potential stresses imposed on the foundation.

In designing foundations for engines, particularly in applications where performance and reliability are critical, adhering to this ratio helps to minimize issues such as excessive vibration or instability that could arise from inadequate foundation depth. A greater foundation depth than this ratio might lead to unnecessary costs and material use, while a depth less than this ratio could compromise structural integrity and performance.

Understanding this rule aids engineers and designers in making informed decisions when designing foundations for engines, ensuring safety, longevity, and operational efficiency.