Steam Engine Build/Base Plate Calculations

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Engine Base Plate Measurements

Valve End Mount

• Base Flange is 2" wide
• Mount holes are 6.5" apart, 3.25" to centerline of engine.
• 1" from center of mount hole to edge of base flange.
• End mount plate is 0.5" wide.
• Total width: 1.5"

Valve Seat

• Plate is 0.5" thick.
• Total width: 0.5"

Cylinder Cover

• Cylinder cover is 6.0" long.
• Total width: 6.0"

Cylinder End Mount

• Base Flange is 2" wide
• Mount holes are 6.5" apart, 3.25" to centerline of engine.
• 1" from center of mount hole to edge of base flange.
• End mount plate is 0.5" wide.
• Total width: 1.5"

Total length of Engine: 9.5"

Piston/Conector Rod Base Plate Measurements

Bump Valve Pins:

• Length is 0.875"
• Valve opening: 0.2: (counted as a negative number against Valve Seat width)
• Total width: 0.175"

Piston Head

• Height of head: 2.0"
• Depth of pin holes: 0.5"
• Depth of stem hole: 1.0"
• Total width: 0.5"

Piston Stem

• Length: 7.0"
• Connector rod hole offset: 0.125"
• Total width: 5.875"

Connector Rod Coupler

• Hole offset 0.125"
• Connector rod hole depth: 0.5"
• Total width: 0.875"

Connector Rod

• Length: 5.0:
• Total width: 5.0"

Bearing Case Bottom:

• Height: 2.75"
• Connector rod hole depth: 0.5"
• Total width: 2.25"

Total length of piston/conector-rod: 8.8"

Crankshaft Base Plate Measurements

Crank

• Crank width: 2.5"
• Counterwieght exposure: 0.75"
• Total width: 4.0"

Pillow Block

• Pillow Block Assembly offset: 2.0"
• Total width: 4.0"

Total distance between pillow block mount centers: 8.0"
Width between pillow block mount centers: 4.0"