Price Units

The precision built Mike Brown 2-cylinder steam engine can support loads up to 3 horsepower.
The flywheel sits between the cylinders and has a groove cut in it for a belt to power a generator, water pump, or other device.
This is the engine we use in our Model recommend for small cabins or emergency use.

Title Input Calc Constants Value Units
MAWP – Maximum allowable working pressure 100
To Determine Steam Engine Boiler Horsepower
P – Mean Effective Pressure in Cylinder 80% of boiler 80 Mean Effective Pressure in Cylinder 80% of boiler 80%
L – Length of Stroke in feet 2.25 0.18 Converted to Inches.
A – Area of Piston in Inches 1.65 2.13 1.5/8
N – Revolutions per minute 700 700
Piston Boiler HP 0.68 1 HP = 33,000 ft-lbf/min 33000 ft-lbf
Engine Horse Power with 2 pistons 1.36
Pounds of steam per hour 46.94 The Boiler Horsepower (BHP) is the amount of energy required to produce 34.5 pounds of steam per hour at a pressure and temperature of 0 Psig and 212 degrees, with feed water at 0 Psig and 212 degrees 34.5 lbs
Gallons of water per hour 6 Water Weight per gallon 8.3 lbs
To Determine Electrical Generation
Generator Horse Power (20% less) 1.08 Pulley Efficiency 80%
Kilo Watts per hour with loss 1 Generator Efficiency 80%
AMPS per hour 5.65 Watts per HP 746 watts
To Determine Boiler Fuel Usage
BTU Input 46944.23 1000 BTU’s per pound of steam for a BHP is equivalent to 33,475 BTU/Hr 1000
Actual BTU Input with Added Fuel 56333 20% fuel Added for inefficiency
Pine, Lodge pole Wood BTU per pound 6206 20% Moister of Lodge pole Pine based on Site: 2465 pounds per cord
Pounds of wood per hour 9.08
Cord per hour 0.37%
Manufacturer’s Details:
17 inches long, 13 inches wide, 8 inches high, approximately 65 pounds.

The bore is 1.625 inches. The stroke is 2.25 inches.

The crankshaft diameter is 5/8 inches.

The flywheel diameter is 7.5 inches.

Steam intake .25 inch pipe, exhaust .25 inch pipe.

Maximum rpm is 700.

Manufacturers roller bearings endurance limits on the crankshaft are as follows: 860 lb. static load capacity, 350 lb. @ 600 rpm, 185 lb. @ 5000 rpm