Wetted Surface - Mumford Formula
Wetted-surface estimate for displacement hulls from LWL, T and displacement. Used for quick resistance estimates when offsets are unavailable.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Waterline length | m | |
| Draft | m | |
| Displacement volume | m³ | |
| Wetted surface | m² |
Source: Mumford quoted in SNAME PNA Vol II Ch.5
In short
Wetted-surface estimate for displacement hulls from LWL, T and displacement.