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Lofting Coordinates
Lofting coordinates are used for aircraft body measurements. The system derives from the one that was used in the shipbuilding lofting process, with longitudinal axis labeled as "stations" (usually fuselage stations, frame stations, FS), transverse axis as "buttocks lines" (or butt lines, BL), and vertical axis as "waterlines" (WL). The lofting coordinate frame is similar, but not the same as aircraft principal axes used to describe the aircraft flight. For the US-manufactured aircraft the ticks on the axes are labeled in inches, (for example, WL 100 is 100 inches above the base waterline). Fuselage station Fuselage stations are traditionally nonnegative, thus the origin is located at the nose (aircraft), nose of the plane or, sometimes, ahead of it. When compared to the coordinates used for aeromechanics, the fuselage stations are measured in the opposite direction than the ticks on the x-axis (and might not be aligned at all, if the wind-aligned coordinate system is used to d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterline On The Airplane
The waterline is the line where the Hull (watercraft), hull of a ship meets the surface of the water. A waterline can also refer to any line on a ship's hull that is parallel to the water's surface when the ship is afloat in a level trimmed position. Hence, waterlines are a class of "ships lines" used to denote the shape of a hull in naval architecture lines plans. The Load line (watercraft), load line (also known as Plimsoll line) is the waterline which indicates the legal limit to which a ship may be loaded for specific water types and temperatures in order to safely maintain buoyancy. For vessels with Hull (watercraft), displacement hulls, the hull speed is defined by, among other things, the waterline length. In a sailing boat, the waterline length can change significantly as the boat Sailing#Heeling, heels, and can dynamically affect the speed of the boat. Aircraft In the aircraft design the term ''waterline'' designates a horizontal reference line used in alignment c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
