The question
How far does the hull settle into still water as the requested mass increases? The H0 R03 displacement study evaluates freshwater at 998 kg/m³ and seawater at 1,025 kg/m³, with pitch and roll held at zero.
What the calculation shows
At a requested mass of 40 kg, the calculated level immersion in seawater is approximately 0.0705 m. At 80 kg it is approximately 0.1318 m. These are samples of a level-attitude displacement curve, not equilibrium solutions for a particular rider or component arrangement.
Level-attitude displacement
40 kg → 0.0705 m level immersion in seawater.
H0 R03 · source samples connected, no extrapolation. 100 kg is unachievable in both source series and is not plotted. No uncertainty band supplied.
View the numerical data
| Mass (kg) | Freshwater immersion (m) | Seawater immersion (m) |
|---|---|---|
| 5 | 0.01336 | 0.01301 |
| 10 | 0.02514 | 0.02458 |
| 15 | 0.03473 | 0.03403 |
| 18.2 | 0.04014 | 0.03935 |
| 20 | 0.04305 | 0.04221 |
| 22 | 0.04619 | 0.04529 |
| 25 | 0.05074 | 0.04976 |
| 30 | 0.05802 | 0.05689 |
| 40 | 0.07190 | 0.07045 |
| 50 | 0.08567 | 0.08386 |
| 60 | 0.09952 | 0.09732 |
| 80 | 0.13774 | 0.13185 |
| 100 | Unachievable | Unachievable |
Assumptions and limitations
The model is a sealed external envelope. Openings, intake and seals are not modelled. The 100 kg request is unachievable in both source series and is omitted from the plotted curves. No uncertainty band is supplied. This is not a physical test, dynamic performance result or safe-payload rating.
What comes next
Actual loaded equilibrium cases require fuel capacity, fuel density and liquid centre of gravity, plus rider mass, stance and body centre of gravity. Clearance to real openings must also be assessed before operational conclusions are drawn.
Source record
- H0_R03_Displacement_Curve.csv
- H0_R03_Dry_Hydrostatics.json
Initial website summary of the existing R03 study. No new engineering result.
Later corrections and follow-up studies will link back to this record.