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This is a
Castings by Pacific Model Design
1.375 " bore and 1.500" stroke.
Fuel; gas or propane, the carburetors have two
needle valves, one for gas and one for propane. Ignition; Ignitor
These are some in progress pictures.
First posting 2/8/2003
The crank throws are 120 degrees apart,
which makes it well balanced. It is ignitor fired, fuel is propane or
gas. This engine is quite different from most engines, it has air
start. If some of you are not familiar with this there is a shifting
mechanism when shifted that stops the intake valve from working, and
shifts a cam that operates an air valve putting air in the rear
cylinder only on the power stroke. The compression is released on
number two cylinder, and it starts on number one. Once it is running
close the compression release on number two, move the shifter on three
and all three are firing, the firing order is 1 2 3.
For those of you that like drilling and
tapping holes this is the engine for you. It has 172 holes just in
the engine block, and 124 bolts. This engine has 253 parts not
counting bolts and nuts, and 54 castings. Will send a picture later
when it is all done. I am also building a two cylinder at the same
time, they share the same parts, other than the cam, crank, and block.
Copyright 2003, Florida Association of Model Engineers
and engine builder as noted above,
All rights reserved.