| 4-In-1
Vacuum Engine |
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The correct terminology is
"atmospheric engine". Never the less, here is a
"flame eater" engine you can build any of
four ways: (1) - Air Cooled Side Crank as shown, (2) -
Water Cooled Side Crank, (3) - Air Cooled Center Crank
or (4) - Water Cooled Center Crank!
The air cooled engines have an optional belt driven
cooling fan which provides cooling for long running
sessions. The engine runs fine without it. With the
fan, the engine will run all day long and never get
hot. But long runs or not, the fan also adds much
interest to the engine.
All four versions use my oscillating (twisting) side
shaft mechanism to operate the head valve. My unique
valve seat is of self lubricating non-metallic
material which greatly reduces valve sliding friction
and virtually eliminates wear. The engine speed range
is from 60 to 600 RPM or so.
The engine can be ran
on an alcohol flame, but for easy and accurate speed
control, use my Mini
Propane Burner on the "Book Shelf Models, Tools,
Etc." menu.
The plans set consists of 19 sheets of drawings and 2
sheets of construction and assembly notes.
Specifications: Flywheel Diameter:
4",
Cylinder Bore: 1",
Piston Stroke: 1-3/8",
Overall Length: 9", Experience
Level: 3
| Materials
Set:
(1) 1.045" dia. x 1.5" long graphite for
piston,
(2) .250" x .500" x .187" thick ball
bearings,
(3) .156" x .312" flanged ball bearings for
fan hub and connecting rod end. Materials set sold separately.
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"All I can say is WOW! I can now
truly appreciate why everyone who has bought your model plans speaks
so highly of you!"
- Robert Schenk (San Francisco, California)
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