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29er (dinghy)
The 29er is a two-man high performance sailing skiff designed by Julian Bethwaite and first produced in 1998.
==Background==
It is targeted at youth, especially those training to sail the larger 49er. It has a single trapeze and a fractional asymmetric spinnaker. The Class is a more modern replacement to Franks previous Laser 2 replacing it in the ISAF Youth Sailing World Championships. A self-tacking jib decreases the work load of the crew, making maneuvers more efficient and freeing the crew to take the mainsheet upwind and on two-sail reaches. The spinnaker rigging set-up challenges crews to be fit and coordinated, and maneuvers in the boat require athleticism due to its lack of inherent stability and the high speed with which the fully battened mainsail and jib power up.
The hull construction is of fibreglass-reinforced polyester in a foam sandwich layout. The fully battened mainsail and jib are made from a transparent Mylar laminate with orange or red Dacron trimming, while the spinnaker is manufactured from ripstop Nylon. The mast is in three parts - an aluminium bottom and middle section, with a polyester-fiberglass composite tip to increase mast bend and decrease both overall weight, and the capsizing moment a heavy mast tip can generate.
The 29er is able to reach high speeds fairly quickly by having a sleek and hydrodynamic hull and will often exceed the wind speed when planing both up and downwind.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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