Froude Number - Hull Speed Regime
Froude number Fn = V/√(g·L) - the dimensionless speed index that determines whether a hull is in displacement, semi-displacement or planing regime.
Loading calculator…
Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Speed through water | m/s | |
| Waterline length | m |
Source: Rawson & Tupper Vol 2
In short
Froude number Fn = V/\u221a(g\u00b7L) - the dimensionless speed index that determines whether a hull is in displacement, semi-displacement or planing regime.