Flywheel Inertia Data: spoked
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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| spoked | spoked_ci_24 | 6,000 | 0.12 | 0.26 | 3,247 | 4 | 69.3 | cast_iron | 50 | 6.008 | Spoked design; rim carries ~90% of I; 6 spokes assumed; hub OD 4 in; classic CI spoked | 24 | steam engine flywheels; belt-driven compressors; lineshaft drives | 5 |
| spoked | spoked_ci_36 | 6,000 | 0.12 | 0.26 | 16,393 | 6 | 116.5 | cast_iron | 50 | 30.33 | 6-spoke CI flywheel; rim section 2 in × 5.5 in; classic large-scale industrial | 36 | large steam engines; old textile mill drives; centrifugal pump drives | 5.5 |
| spoked | spoked_ci_48 | 6,000 | 0.15 | 0.26 | 46,120 | 8 | 196.8 | cast_iron | 50 | 85.33 | 8-spoke CI flywheel; OD 48 in; near upper useful size for CI | 48 | early steam power; large reciprocating engines; traditional mill drives | 6 |
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