Stabilizer Sizing Calculator
Size gyroscopic or fin stabilizers based on vessel characteristics and sea conditions
Stabilizer Recommendations
Recommended Stabilizer Size
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Roll Moment Capacity
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Vessel Roll Period (est.)
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Natural Roll Angle
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Stabilized Roll Angle
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Roll Reduction
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Stabilizer Type Comparison
| Type | At Anchor | Underway | Complexity |
|---|---|---|---|
| Gyroscopic | Excellent | Good | High |
| Active Fins | None | Excellent | High |
| Passive Fins | None | Good | Low |
| Paravanes | Good | Fair | Low |
About Stabilizer Sizing
Gyroscopic Stabilizers: Use a spinning flywheel to resist roll. Sized in Newton-meters (Nm) of roll moment. Effective at anchor and underway. Weight typically 1-3% of displacement.
Active Fin Stabilizers: Require forward motion (typically 6+ knots). Fin area based on displacement and speed. Very effective underway but provide no stability at anchor.
Roll Period Estimation: Natural roll period = 0.44 x Beam / sqrt(GM). Stabilizers should be sized to counter the vessel's natural roll tendency.
Note: Final stabilizer selection should be done with the manufacturer based on detailed vessel specifications and intended use patterns.