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Scale Plunket Jr. 4-Cycle Gas Engine
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Plunket Jr. is about a
1/2 scale model of the 1/2 H.P. Plunket Jr. engine
manufactured by the J.E. Plunket Company of Chicago,
Illinois around 1909. It was used to power washing
machines, sewing machines and other household chores.
It is shown on page 395 of "American Gasoline
Engines Since 1872" by C.H. Wendel.
The model is machined mostly from brass bar stock. You
will need a 6" lathe and at least a medium size
milling machine with a 6" diameter rotary table.
Lots of prior shop experience is required. This engine
is not for beginners.
The model runs from 350 RPM idle to around 3,000 RPM
or so wide open and the sound is really neat with the
right exhaust pipe at about 900 RPM.
The plans set consists of 25 sheets of drawings and
include a 2-jet throttle carburetor, water pump, fan
and radiator core that I designed to cool my engine -
you will want to design your own radiator housing,
piping and fuel tank. Plus, there are 2 sheets of
construction and assembly notes.
Specifications: Flywheel Dia.: 5",
Cylinder Bore: 1",
Piston Stroke: 1-1/2",
Overall Length: 10-1/2" Experience
Level: 4
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"I got your plans, thanks. Excellent
quality. They are much better than the usual sort of
rubbish I find in the UK." - Danny Quinlan
(Brentwood, Essex, England)
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