Other Definitions
nose cone (dict)
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Nose ConeThe nose cone is usually used to refer to the forwardmost, usually separable section of a rocket or guided missile that is shaped to offer minimum aerodynamic resistance. Nose cones are also designed for travel in and under water and in high speed land vehicles. When building a nose cone, the main problem is determining the shape. It requires a solid of revolution that experiences minimal resistance to rapid motion through a medium consisting of elastic particles. Nose cone shapes and equations General Dimensions In all of the following nose cone shape equations, L is the overall length of the nose cone and R is the radius of the base of the nosecone. y is the radius at any point x, as x varies from 0, at the tip of the nosecone, to L. The equations define the 2-dimensional profile of the nose shape. The full body of revolution of the nose cone is formed by rotating the profile around the centerline (C/L). Note that the equations describe the 'perfect' shape; practical nosecones are often blunted or truncated for manufacturing or aerodynamic reasons. Conical A very common nose cone shape is a simple cone. This shape is often chosen for its ease of manufacture, and is also often (mis)chosen for its drag characteristics. The sides of a conical profile are straight lines, so the diameter equation is simply right -
Cones are sometimes defined by their half angle, : - and
Bi-conic A bi-conic nose cone shape is simply a cone with length L1 stacked on top of a frustrum of a cone (commonly known as a conical transition section shape) with lengh L2, where the base of the upper cone is equal in radius R1 to the top radius of the smaller frustrum with base radius R2. right - L = L1 + L2
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half angle : - and
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half angle : : and
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