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The equations that I used to assess the cam in the Ready to Fly model mainly come from Figure 3, taken from the Design of Machinery textbook (Norton, 2012). The two vector loops I used, which will be discussed further in the Follower Motion and Fin Motion sections, are:
Where x is the horizontal distance between the axis of rotation and point of contact, Rb is the radius of the cam’s base circle, s is the displacement of the follower, and r and q define the Cartesian coordinates of the contact point with respect to the rotating axis coordinate system embedded in the cam (Norton, 2012). Eccentricity, or the distance between the follower’s axis of motion and the center of the cam, does not factor into these equations, but it does play a factor in sizing a cam when a roller follower is used. Also, pressure angle, the angle between the follower’s direction of motion and the axis of transmission, is zero for all positions of the cam and follower. Before I could put these equations to use, I had to build the model.
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