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.
|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%|
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