Content Inside :
I was asked to show a simple example of how I go about creating surfaces to form something like that of a motorcycle gas tank. The tutorial that preceded this one had left a lot of people with some questions, like: Don’t you have something that will show a novice how to use surfaces? Well my answer was (is) this is about as simple as it gets. I just did a poor job of communicating it. In rereading my tutorial I guess I did assume some things. So now I offer you all a step-by-step on how I created this “Gas Tank”. Make this sketch on the Front Plane. This sketch includes four (4) arcs and some construction lines. Nobody really cares what the two large arcs are in radius. We only want to know what the rise (offset) is, so why not dimension it that way. You will notice that split has a blue color. That means that its not fully constrained, so let’s fix that and constrain it to the horizontal construction line. Now do the same for rear arc as well. Using the upper spline that we made in Sketch2, make an Extruded surface about 1 or 2 inches in length. And again for the bottom as well. Also make the spline tangent to the surface edges at both ends. Not shown here but you’ll need to dimension the two intermediate points as well. With the Profiles box highlighted, the selection order should go like this: select the inside edge of the upper extruded surface, then the side profile spline (Sketch4 in my example), the inside edge of the lower extruded surface.
Tags : construction lines, construction line, gas tank, side profile, intermediate points, poor job, spline, arcs, sketch, novice, arc, motorcycle, surfaces, radius, profiles
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