1. stability slides from rom2 only available direct from rya training 2
TRANSCRIPT
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Stability Righting lever
Boats return to the upright because of an interaction between their weight and buoyancy
centre of gravitycentre of buoyancy
As a boat heels, B moves away from G creating a righting lever called GZA heavy boat takes more energy to heel because......energy = boat weight (force) x GZ (distance) = RM (righting moment)
GZ (Righting arm) vs. kN (Righting moment)
IMS 33AVS 127⁰
Area above curve = energy required to capsize yacht
IMS 41
GZ (Righting arm) vs. kN (Righting moment)
AVS 135⁰
Area above curve = energy required to capsize yacht
MALO 41AVS 132⁰
Area above curve = energy required to capsize yacht
GZ (Righting arm) vs. kN (Righting moment)
Different STIX…and different capacity to resist capsize
IMS 33 IMS 41 MALO 41ISO STIX 33.3 ISO STIX 47.8 ISO STIX 55.4