Pier du Sud est capitaine de voilier, marin et instructeur de voile. Il rédige des textes sur la voile, la navigation et les voyages en mer.
400 Hours and 100 Hours Forecast

Forecasting Tides With 37 Numbers

Tides are special. Almost all aspects of the weather are the outcome of complex interactions: cloud formation, winds, or rain patterns. For any of these dimensions, advanced numerical modeling is required in order to produce reliable forecasts, often limited to a window of four days. These models rely on large...

Yanmar 3GM20.

Diesel Engines: First Principles

A diesel engine relies on a controlled explosion in four stages: intake, compression, explosion and output. Unlike gas, diesel ignites on compression alone in the cylinder: no spark plug is needed.