Circumference Calculations
Pedal Sprocket (d): 8.5”
            Circ = 8.5” * pi = 26.70”
Bike Wheel Sprocket (d): 2.25”
            Circ. = 2.25” * pi = 7.07”
Bike Wheel (d): 19.75”
            Circ. = 19.75” * pi = 62.05”
Alternator Wheel (d): 3.0”
            Circ. = 3.0” * pi = 9.42”

Circumference Ratios
Pedal Sprocket: 1
Bike Wheel Sprocket: 3.78
Bike Wheel: 3.78
Alternator: 6.59

Pedal RPM: 60 / 90
Alternator RPM: 1495 / 2242

Alternator RPM
FJ40 Idles @ 650 RPM (from: Haynes Auto Repair Manual, Toyota Land Cruiser 1968-82)

Main Engine Pulley (d): 4.75”
            Circ. = 4.75” * pi = 14.92”
Alternator Pulley (d): 1.875”
            Circ. = 1.875" * pi = 5.89”
            Ratio: 2.53
Alternator RPM @ Idle: 650 * 2.53 = 1647 RPM
            Equivalent to Pedaling @ approx. 66 RPM

Electric Load
• Connected Inverter to 12V Auto Battery with a Multimeter in
series at positive terminal
• Plugged TV and VCR into Inverter
• Turned on TV and VCR
• Measured 6.54 Amps @ 12V
            P=IV= 6.54A * 12V = 78.5 W