Apparatus and method for determining the inertia matrix of a rig

Details Apparatus and method for determining the inertia matrix of a rig Apparatus and method for determining the inertia matrix of a rig

1993-04-08

1994-05-10

Chilcot, Jr., Richard E.

Measuring and testing

Center of gravity; turning moment; metacentric height

Ball driving sporting implement

73 6501, A63B 5300

Patent

active

053097530

ABSTRACT:
The experimental determination of the moments of inertia of a rigid body such as a golf-club head about each of three mutually perpendicular axes is described. The club head is suspended so as to swing as a pendulum about an axis that is parallel to each of the axes of interest and the moments of inertia are calculated from the periods of oscillation and physical properties of the body. The products of inertia must be calculated from the moments of inertia in multiple axis systems. Once the inertia matrix is complete, the associated ellipsoid of inertia displays the inertial properties of the rigid body without reference to a specific coordinate system. The inertia ellipsoids of two golf-club heads are determined and compared to demonstrate the procedure.

REFERENCES:
patent: 1953916 (1934-04-01), Adams
patent: 2094806 (1937-10-01), Murdoch
patent: 3473370 (1969-10-01), Marliniak
patent: 3703824 (1972-11-01), Osborne et al.
patent: 4212193 (1980-07-01), Turley
patent: 4603577 (1986-08-01), Johnson et al.

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