Horsepower and torque:

    HP = Torque x Rpm / 5252        example: 2hp = 35 ftlbs x 300 rpm /5252

    Torque = HP / (Rpm/5252)        example: 2hp / ( 300 rpm / 5252) = 35 ftlbs

    Rpm = HP/ (Torque/5252)         example: 2hp / ( 35 / 5252) = 300 rpm

Power = Work / Time

Work = Force * Distance

Power = Force * Distance / time

BTU ( British Thermal Units)

    BTU is the rate of bringing 1 lb of water up 1 degree.

    BTU = pounds of water * difference in temperature rise

        1 cubic foot of water = 64.2 lbs

        So to bring 1 cubic foot of water from 50 degrees to 100 degrees ( 50 degree difference )

            BTU = 64.2 lbs ( 1 cubic foot ) * 50 degrees

            BTU = 3210

        1 cubic foot of water = 7.48 gallons ( or 8.58 lbs per gallon )

        Say you have a gallon of water (8.58 lbs) and its at 60 degrees,  you want to bring it up to 110 degrees.  You will need a 50 degree rise in temperature

        BTU = 8.5 * 50 = 425 Btu

        Watts = 425 Btu / 3.41 = 125 watts

        So at 125 volts you would need one amp for one hour to bring the water to the desired temperature.

Centrifugal Force:

    .000341 * W * R * n^2

    Where:     W = weight of outer ring

                    R = Radius in feet

                    n = RPM

Kinetic energy:

    E = ( W * V^2) / (2 * g)

    Where      E = total energy in flywheel, in ft lbs

                    W = weight of flywheel

                    V = velocity in feet per second of outer radius