Flywheel Energy Storage Devices

Flywheel Density (kg/m3) Volume
Flywheel Type Mass
Flywheel Radius (m) Revolutions
per second
Flywheel Height (if cylinder only) (m) Rim Speed
metres per second
Flywheel Revolutions (RPM) Period
Desired Output (MW) w
"omega" per second
Output Efficiency (%) Acceleration at Rim
metres per second squared
Acceleration at Rim
Earth Gravities
Moment of Inertia
kg m2
Total Stored Energy
Output Run Time at listed efficiency
days   hours   minutes   seconds

(copyright A.Goddard May 2000) 
used with permission. 
This is part of an article at Creativyst titled: Reducing Dependence On Proprietary Systems