Generous reserve buoyancy, narrow beam, low center of gravity, and balanced hull form make the J/90 an easy boat to steer even at large angles of heel. This means more fun going fast …

A single purpose race boat that was only in production for 1 year.

J/90 is built to meet ABS specifications for offshore yacht construction. Hull and deck use carbon fiber biaxial and unidirectional inner skins, pre-molded Corecell A-500 foam core material, and …

2003年6月4日 · The J/90 takes things very much to the limits with a lightweight hull in modern materials fitted with a substantial lead, bronze bulb keel and carbon rig. The result is an …

J/90 is a 9.2 m monohull sailboat designed by Rod Johnstone and built by J Boats between 1997 and 1998. The theoretical maximum speed that a displacement hull can move efficiently …

J/90 Technical specifications & dimensions- including layouts, sailplan and hull profile.

j是正90度还是负90度是正90度。 在复平面中，虚轴与实轴成90度角，任何一个数乘以j后，积的向量就是原来的向量逆时针旋转了90度，即（Ze^jθ）j=Ze^j（θ+90°），这里j=e^j90°，在电工 …

2018年11月30日 · 在复平面中，.虚轴与实轴成90度角，任何一个数乘以j后，积的向量就是原来的向量逆时针旋转了90度， 即 (Ze^jθ)j=Ze^j(θ+90°)，这里j=e^j90°，在电工技术上又写作j=∠90°。

J/90 Combines Handling Ease & Grand-Prix Performance with the stability of a 40 ft. in a super-charged 30 ft. The forgiving hull is shaped for easy control by sailors of all levels. The …

Blue Water Surf Value Rank (BWSVR) 6316. Capsize Comfort Value Rank (CCVR)