Based on the 1:10.5 scale model video, it appears that the waves in the tank were relatively small, with a height of approximately 1-2 inches (2.5-5 cm). This estimation is based on the visual observation of the water surface in the tank and the motion of the model seastead.
Using the scale factor of 1:10.5, the wave heights for the full-scale seastead can be estimated as follows:
The motion of a floating vessel in waves can be approximated using the following formula for acceleration due to wave motion:
Acceleration (a) = Wave Height (H) × Wave Frequency (f)² × Displacement Volume (V)
Assuming the full-scale seastead has a displacement volume comparable to a 50-foot catamaran or a 60-foot monohull, the acceleration due to waves
can be estimated. For example:
Using the formula:
Acceleration (a) = 0.15 m × (0.1 Hz)² × 1,000 m³ = 0.00015 m/s² (model)
Acceleration (a) = 0.3 m × (0.1 Hz)² × 1,000 m³ = 0.0003 m/s² (full scale)
These accelerations are significantly lower than those experienced by typical 50-foot catamarans or 60-foot monohulls, which often experience
accelerations in the range of 0.001-0.005 m/s²> under similar wave conditions.
| Vessel Type | >Typical Acceleration (m/s²) | Comparison to Seastead | >
|---|---|---|
| 50-Foot Catamaran | >0.001 - 0.005 | >2-5 times higher |
| 60-Foot Monohull | >0.002 - 0.006 | >2-4 times higher |
| Full-Scale Seastead (Proposed) | 0.00015 - 0.0003 | >Lower than other vessels | >
The seastead's design incorporates three legs with NACA 0035 foil shapes, providing buoyancy and stability. The small waterline area and foil design are expected to reduce motion compared to traditional semi-submersible platforms. The use of heave plates and independent power systems further enhances stability and reduces accelerations.
The proposed seastead design, with its trimaran-like configuration and foil-shaped legs, is expected to have significantly lower accelerations due to wave motion compared to a 50-foot catamaran or 60-foot monohull. This makes it a more comfortable platform for living and operation in rough conditions. The design also prioritizes modularity and ease of assembly, making it suitable for shipping to a shipyard for final construction.
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