Flywheel Inertia Data: solid_disc
Flywheel inertia and energy storage reference data for speed regulation and press design — solid disc, rimmed, spoked, and composite rotor configurations across cast iron, steel, aluminum, and carbon fiber composite materials; covers small (5–12 in OD), medium (12–36 in OD), and large (36–72 in OD) size ranges
| flywheel type | flywheel id | allowable stress psi (psi) | coefficient of fluctuation typical | density lb in3 (lb/in3) | energy stored ft lb at 1000rpm (ft_lbf) | inner diameter in (in) | mass lb (lb) | material | max rim speed ft per s (ft/s) | moment of inertia lb ft2 (lb_ft2) | notes | outer diameter in (in) | typical applications | width in (in) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| solid_disc | solid_disc_alum_12 | 15,000 | 0.03 | 0.098 | 122.6 | 0 | 15.2 | aluminum | 130 | 0.227 | Alloy 6061-T6 or 2024-T4; rho=0.098 lb/in3 | 12 | motorsport applications; lightweight IC engines; aircraft accessories | 2.5 |
| solid_disc | solid_disc_alum_9 | 15,000 | 0.03 | 0.098 | 32.5 | 0 | 7.2 | aluminum | 130 | 0.06 | Aluminum 2024-T4 allowable ~15000 psi (0.4*Sy); higher speed due to low density; max rim ~130 ft/s | 9 | racing engines; weight-critical applications; high-speed small engines | 2 |
| solid_disc | solid_disc_ci_12 | 6,000 | 0.1 | 0.26 | 323 | 0 | 39.9 | cast_iron | 50 | 0.599 | I=0.5*m*(R^2); OD 12 in solid CI disc | 12 | medium punch presses; 4-cyl IC engines; compressors | 2.5 |
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