TABLE OF CONTENTS | a | major axis of ellipse, m (in) negative acceleration or deceleration, m/s 2 (ft/s 2) | |
| A | cross-sectional area of the rim, m 2 (in 2) | |
| b | minor axis of ellipse, m (in) width of rim, m (in) | |
| C f | coefficient of fluctuation of rotation | |
| d | diameter of shaft, m (in) | |
| d h | hub diameter, m (in) | |
| D | flywheel diameter, m (in) | |
| D o | outside diameter of rim, m (in) | |
| E | excess energy, J (ft lbf) | |
| F c | centrifugal force, kN (lbf) | |
| F ? c | centrifugal force per unit width of rim, kN (lbf) | |
| g | acceleration due to gravity, 9.8066 m/s 2 (32.2 ft/s 2) | |
| h | depth of rim, m (in) | |
| i | number of arms | |
| k o | polar radius of gyration of the rim, m (in) | |
| I | mass moment of inertia, N s 2 m (lbf s 2 ft) | |
| J | polar second moment of inertia, m 4 (in 4) | |
| K t | torsional stiffness of shaft, N m/rad (lbf in/rad) | |
| M tm | mean torque, N m (lbf ft) | |
| m t | transmitted torque, N m (lbf ft) | |
| m | coefficient of steadiness | |
| n | mean speed, rpm | |
| n 1 | maximum speed, rpm | |
| n 2 | minimum speed, rpm | |
| r | mean radius of the flywheel, m (in) | |
| t | time, s | |
| T 1 | tension in belt on... |
