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STABILITY Slides from ROM2 Only available direct from RYA training

STABILITY Slides from ROM2 Only available direct from RYA training. Stability. Righting lever. Boats return to the upright because of an interaction between their weight and buoyancy. As a boat heels, B moves away from G creating a righting lever called GZ.

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STABILITY Slides from ROM2 Only available direct from RYA training

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  1. STABILITY Slides from ROM2 Only available direct from RYA training

  2. Stability Righting lever Boats return to the upright because of an interaction between their weight and buoyancy As a boat heels, B moves away from G creating a righting lever called GZ A heavy boat takes more energy to heel because... ...energy = boat weight (force) x GZ (distance) = RM (righting moment) centre of gravity centre of buoyancy

  3. AVS for a vessel without roller furling gear AVS for a vessel with roller furling gear

  4. Lifeboat Curve

  5. Testing underway

  6. IMS 33 Racer

  7. IMS 41 Racer

  8. MALO 41

  9. IMS 33 – Righting Arm (GZ) Curve

  10. IMS 41 – Righting Arm (GZ) Curve

  11. MALO41 – Righting Arm (GZ) Curve

  12. IMS 33 – Righting Lever (kN) Curve

  13. IMS 41 – Righting Lever (kN) Curve

  14. MALO41 – Righting Lever (kN) Curve

  15. Contessa 32 – Righting Lever (GZ)

  16. Different Hull Designs

  17. Water Ballast

  18. Finding the Centre of Gravity

  19. GZ

  20. GZ (Righting arm) vs. kN(Righting moment) IMS 33 Area above curve = energy required to capsize yacht AVS 127⁰

  21. GZ (Righting arm) vs. kN(Righting moment) IMS 41 Area above curve = energy required to capsize yacht AVS 135⁰

  22. GZ (Righting arm) vs. kN (Righting moment) MALO 41 Area above curve = energy required to capsize yacht AVS 132⁰

  23. Different STIX… and different capacity to resist capsize IMS 33 IMS 41 MALO 41 ISO STIX 55.4 ISO STIX 33.3 ISO STIX 47.8

  24. ???

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