Include this frame in the count of bodies, so that mobility is independent of the choice of the fixed frame, then we have M = 6 ( N-1 ), where N = n + 1 is the number of moving bodies plus the fixed body.
42.
If we suppose a set of frames, able to move each with respect to the former according to just one angle, like a gimbal, there will exist an external fixed frame, one final frame and two frames in the middle, which are called " intermediate frames ".
43.
For convenience locate the fixed pivot of the input crank at the origin of the fixed frame, "'O "'= ( 0, 0 ), and let the fixed pivot of the output crank be located at "'C "'= ( c x, c y ), which is chosen by the designer.
44.
Where \ rho _ \ infty \, and V _ \ infty \, are the fluid density and the fluid velocity far upstream of the airfoil which is now regarded fix on a body fixed frame, and \ Gamma \, is the ( anticlockwise positive ) circulation defined as the line integral,
45.
The Framing Channel occupies Slots 0 and 96 of each Frame . ( Since all Subframe lengths divide 96, these Slots are always available for the purpose . ) Slot 0 holds a fixed Frame Sync symbol ( 1011 2 ), while Slot 96 holds 4 bits of a Framing Information word.
