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Vacuum Engine
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These are also
known by some as "Fire Eaters" or
"Flame Suckers" but technically, they
are "Atmospheric" engines.
My unique valve mechanism operates from an
oscillating side shaft. The engine is shown
powered by one of my Mini Propane Burners (a separate
plans set) at the front of the engine.
You can run yours with an alcohol lamp if you
like. A belt driven fan provides some air
cooling, it also adds considerable interest to
the engine. There is no ignition or carburetor
to cause problems. The engine can operate from
200 RPM up to 3,000 RPM or more! As hot-air
engines - not stirling cycle - they are unusual
in that they make a popping sound not unlike an
internal combustion engine.
I built this engine 25 years ago. It is easy to
build, but it is small and has some small parts
in it. For a larger more refined
"atmospheric" engine, see the
"4-in-1" Vacuum Engine below.
The plans set consists of 4 sheets of drawings
and 1 sheet of construction and assembly notes.
Specifications:
Flywheel Diameter:
2-3/8",
Cylinder Bore: .610",
Piston Stroke: 7/8",
Overall Length: 4-1/2" Experience
Level: 1
Materials
Set:
(1) Graphite rod to make piston,
(2) 3/16" ID x 3/8" OD x 1/8" thick
precision ball bearings. Materials
set sold separately.
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"Thanks for the great tips on your web
site. I have ordered plans from you in the past, great
quality, prices more than reasonable. Keep up the good
work." - Mike Nay (West Valley City, Utah)
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