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- Q4700049 subject Q8696914.
- Q4700049 subject Q8737608.
- Q4700049 abstract "The aka of a multihull sailboat is a member of the framework that connects the hull to the ama(s) (outrigger). The term aka originated with the proa, but is also applied to modern trimarans. The design of the aka depends on the forces it will encounter when sailing. For example, there are two modern variations of the proa, the traditional or Pacific proa, with the ama to the windward side, and the modern Atlantic proa, with the ama to the leeward. The windward ama provides stability by placing the center of gravity far to the windward of the sail, so it is generally heavy. Ropes leading from the mast to the ama provide the force to lift the ama, so the aka must contend mainly with compressive forces, and the weight of the crew, who generally ride on a platform running between the aka.An Atlantic proa or a trimaran rely on an ama to leeward to provide stability. The ama provides stability by moving the center of buoyancy to the leeward side, and well designed leeward amas will also provide dynamic lift to increase the stability further. The aka for a leeward ama must be designed to handle significant amounts of torque from the lift produced by the ama. Often trimarans will have a platform between the aka, so the crew can ride out on the windward side. While this is not truly necessary from a stability point of view (the ama generally provides a tremendous amount of lift) it does reduce the drag generated by the leeward ama.".
- Q4700049 wikiPageWikiLink Q1075310.
- Q4700049 wikiPageWikiLink Q143158.
- Q4700049 wikiPageWikiLink Q1535890.
- Q4700049 wikiPageWikiLink Q1642862.
- Q4700049 wikiPageWikiLink Q1710791.
- Q4700049 wikiPageWikiLink Q171529.
- Q4700049 wikiPageWikiLink Q194433.
- Q4700049 wikiPageWikiLink Q206621.
- Q4700049 wikiPageWikiLink Q25999.
- Q4700049 wikiPageWikiLink Q2945123.
- Q4700049 wikiPageWikiLink Q331744.
- Q4700049 wikiPageWikiLink Q372001.
- Q4700049 wikiPageWikiLink Q426745.
- Q4700049 wikiPageWikiLink Q4700049.
- Q4700049 wikiPageWikiLink Q4738968.
- Q4700049 wikiPageWikiLink Q48103.
- Q4700049 wikiPageWikiLink Q630415.
- Q4700049 wikiPageWikiLink Q639140.
- Q4700049 wikiPageWikiLink Q8696914.
- Q4700049 wikiPageWikiLink Q8737608.
- Q4700049 wikiPageWikiLink Q9237.
- Q4700049 comment "The aka of a multihull sailboat is a member of the framework that connects the hull to the ama(s) (outrigger). The term aka originated with the proa, but is also applied to modern trimarans. The design of the aka depends on the forces it will encounter when sailing. For example, there are two modern variations of the proa, the traditional or Pacific proa, with the ama to the windward side, and the modern Atlantic proa, with the ama to the leeward.".
- Q4700049 label "Aka (sailing)".