Stirling Cycle Pumping Engine
stirling cycle engine is unique in that there
is no mechanical connection to the displacer.
The displacer operates itself from the
pulsating pressure variations within the
engine. The engine has only four moving parts.
The engine makes a distinctive thumping sound
like no other engine and runs at a fairly
constant speed of around 700 RPM when powered
by my Mini Propane burner which is highly
recommended (see the "Other Interesting
This is a water cooled model and the plans
also include an engine driven oscillating
water pump that has only three moving parts
and no check valves! It is your choice to
build the pump or to supply cooling water to
the engine by other means.
Ringbom engines and the plans are very rare
but now you can build a Ringbom engine of your
The plans set consists of 11 sheets of
drawings and 2 sheets of construction and
Specifications: Flywheel Diameter:
Cylinder Bore: 1/2",
Piston Stroke: 5/8",
Overall Height: 6-1/4" Experience
(1) 5/8" dia. x 1.9" long graphite for
(2) .156" x .312" flanged bearings. Materials
set sold separately.
for ALL that you contribute to the model engine world
and the machining hobby in general with your great
plans and designs." - John Guenther