|Miser Low Temp
Stirling Cycle Engine Plans
Miser engine type is the best conversation piece ever
invented. It will run on a cup of warm coffee, the warmth of
your hand, or even an ice cream cone! Here is an engine that
you can actually operate in bed with no danger of setting the sheets on
modified Heinrici stirling cycle engine doesn't need a fire to operate
it. It has no valves, ignition system, carburetor, or exhaust. It will
run on any heat source such as on top of a cup of warm water (coffee),
from the heat of a light bulb if placed on top of a lamp shade, in full
sunlight, on a TV, VCR, and a zillion other sources. It runs at about
90 RPM when held in the palm of a hand and much faster with the other
heat sources. It will also operate in reverse from a cold source such
as ice or snow. As can be seen, the possibilities are almost endless.
who are not ordinarily interested in engines of any kind are always
curious about this one. Unlike other low temperature engines, I
designed Miser to actually look like an engine! Isn't that a novel
idea! It is not as hard to build as it may look, but you can simplify
the styling if you are in a hurry to get yours running.
is built mostly from aluminum alloy bar stock and plate, while most of
the smaller parts are of brass or steel. A few parts that can't be
metal because they need to be good heat insulators are made from clear
acrylic (so the works can be seen) or delrin. The HTF (Hard-To-Find)
Materials Kit below contains the needed materials that may be difficult
for most builders to obtain otherwise. They would also cost more when
obtained from separate multiple sources even if the minimum order
amount was not a problem. The plans are also available separately - see
The plans set consists of 10 sheets of quality laser printed CAD
drawings and 2 sheets of construction and assembly notes.
Flywheel Diameter: 5.2", Cylinder
Bore: .600", Piston Stroke: .625", Overall Height: 7.4" Experience
Available for Miser: (see
photos at http://www.jerry-howell.com/forums/index.php?board=3.0)
Metal Set: Rough metal to build Miser (except screws & drill rod).
19 pieces, 5lbs. (available USA only)
Graphite & Bearings
(1) 5/8" OD x 1.4" long graphite rod to make piston; (2) 5/32" ID x
5/16" OD x 1/8" thick,
flanged precision ball bearings; (1) 3/8" OD x 1.9" long Delrin rod for displacer bushing & crosshead.
OD x 5.5" ID x 1.06" H Plexiglas Miser Displacer Ring: Extruded
Plexiglas Tubing cut at the factory to 1.06" height. You will
need to trim these down to 1".
square x 0.6" thick polystyrene to make the displacer
All items sold
separately. Order these items
Miser engine looks good, not like some half finished scientific
experiment." - Mal Horsfall (Quakers Hill, NSW Australia)