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本帖最后由 snowman 于 2012-12-7 23:01 编辑
toronto_ray 发表于 2012-12-7 22:33 
你问的是燕尾吧?泡得利器,燕尾设计让板尾下沉,板头就轻松浮在白粉上了 ...
There are many different types Alpine snowboard, four main types of Alpine boards that cater to carving: Race, Freecarve, All-Mountain, and Boardercross.
Ray, you are right. The swallowtail Alpine board is one special kind of Alpine snowboard, particularly designed for surfing turns in powder. Below are some information for your reference.
Swallowtail powder board:
Regular freestyle boards don't work well in powder because they are too short, don't have enough taper, and lack adequate flotation. As a result, you will always be putting all your weight on your back foot - your back leg will get really sore, and it's not fun. For deep powder days, forget the carving board and go with a swallowtail, a rocket-shaped board designed for surfing turns in powder. The swallowtail has a few characteristics that make it great for bottomless pow-pow:
• A wide gap in the tail, which allows it to naturally sink in powder without requiring excessive back foot pressure, allowing you to be centered on the board. As a result, it really feels like surfing. In addition, the gap in the tail allows you to turn the board without losing speed.
• A nose that comes to a point (boat-hull), which causes the board to rise to the surface and float on top of the powder. The nose of the swallowtail is generally immune from diving.
• A softer nose, to further enhance the float.
• It often has a large taper, which means the width of the board decreases when going from the nose to the tail. The large taper helps with flotation.
• They tend to be longer - up to 200 cm. The extra length provides good flotation and makes them go fast, but it also means they are sluggish when turning. Not all of them are maneuverable through trees. If you are going on a heli-trip, and the terrain is mostly wide open, go with a swallowtail, but if the terrain includes glades and trees, the swallowtail may not be maneuverable enough.
• Due to the deep gap in the tail, swallowtails lack torsional stiffness and are not good at carving on groomers: they will typically vibrate and nervously flop around when carving at high speed. Some swallowtails are uniquely unsuited to groomers.
Most swallowtails can be ridden with soft boots or softer hard boots, and one good option is to use the older (and now discontinued) snowboard hard boots with fully lugged soles, like the Raichle 121 or the Raichle Snowboarder. Swallowtails also require some care when riding, since it is possible to break one of the tail sections if you apply too much leverage on hard snow, especially with plate bindings.
http://www.alpinecarving.com/boards.html
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