One of these designs has a pair of jet engines mounted aft, but positioned over and above the wing. This aircraft has no tail fins at all (see below).

其中一个设计方案有一对安装在尾部、在机翼上方的发动机，而根本没有尾翼（见下图）。

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A ketch therefore USES three primary sails: the mainsail and head sail, as on a sloop, plus the mizzen sail aft.

因此，双桅帆船使用三面主要的帆：与单桅帆船一致的主帆，前帆，以及尾桅帆。

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Unlike in a ketch or yawl, the forward mast is smaller than the aft mast (or sometimes the same size).

与双桅帆或高低桅帆不同，前侧的桅杆要比后侧的矮(有时尺寸相同)。

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This is a bigger jet, seating four aft of the cockpit and sporting plenty of legroom and a potty.

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One sits underneath the cockpit in a compartment known as the forward electrical equipment bay, which was where Wednesday's malfunction occurred, and a second in the aft bay under the wings, which was the site of last week's fire in Boston.

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Randy Weingarten of the AFT suggested a specific idea: community schools, especially in rural areas, where parents can get training after hours in the same place where their kids are learning during the day, and I think that's a terrific idea worth exploring.

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