|4-In-1 Vacuum Engine Plans
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
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
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.
Flywheel Diameter: 4", Cylinder Bore:
1", Piston Stroke: 1-3/8", Overall Length: 9", Experience
(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.
"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,