By using the method of Orthogonal design this paper investigates the effects of the two-element sail on its aerodynamics performance and the matching of the main sail and the auxiliary one.
本文用正交设计方法较系统地研究了对二元素帆气动特性的影响因素和主、副帆间的配合问题。
For example, with the wind at an intensity that a sloop might have to double-reef the main to reduce sail area, a ketch may sail very well under just jib and mizzen.
例如，当风速在某个强度上时，单桅帆可能必须将主帆四叠起来以减少帆面积，而双桅帆则可以只用前帆和后帆来顺利航行。
Today, there are three main types of space sail: solar ( the one NASA plans to test), electric (being developed in Finland) and magnetic (a concept popular in the 1980s that never quite took off).
现今已有3种主要的太阳帆：太阳驱动（NASA计划测试的类型），电驱动（正在芬兰开发）和磁驱动（1980年代很时髦如今也不算太过时）。
In an unusual take on a self-portrait, a camera aboard Japan's Ikaros spacecraft separated from the main body on June 15 to snap this first picture of the craft's fully deployed solar sail.
在这张不寻常的自拍照片，一台照相机按装在日本的伊卡洛斯飞船上，此飞船于6月15日与其主体脱离后，拍摄了第一张全部展开的太阳帆照片。
KEEL - main structural tube that runs along sail at center chord of wing.
龙骨—沿翼帆中心弦延伸的那根主结构管。
The main-sail hung drooped like a banner.
主帆耷拉着，像一面旗帜。
The Hispaniola was under her main-sail and two jibs, and the beautiful white canvas shone in the sun like snow or silver.
西斯·潘尼·奥拉号正鼓起主帆和两个大三角帆前进，美丽的白帆在阳光下如雪似银。
The main- sail hung drooped like a banner.
主帆像一面旗子耷拉着。
The main-sail hung drooped like a banner.
主帆像一面旗子耷拉着。
The jibs I speedily doused and brought tumbling to the deck, but the main-sail was a harder matter.
我迅速放下三角帆扔到甲板上，但却难以对付主帆。
In this paper, the match of ship, propeller, main engine and sail with sail-assistance is studied.
本文针对船舶采用风帆助航时船、机、桨匹配控制进行学习研究。
In this paper, the match of ship, propeller, main engine and sail with sail-assistance is studied.
本文针对船舶采用风帆助航时船、机、桨匹配控制进行学习研究。
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