Shannon from NC writes about building the "Simplex"
engine in his blog...
"I received five sheets of plans, and three pages of construction notes,
which I think are the better part of this documentation. For
someone starting out, being told how you do something is as important as
being told what to do. The writer can't stand at your back and
look over your shoulder while you work, but his notes are the next best
thing. They also cover assembly and run-in instructions for after the
engine is finished. The plans themselves are clear and well executed CAD
drawings with thorough dimension information. If you have any
experience at all reading mechanical drawings, you should have no
problem." (Larry's blog can be found at
decided to make two Simplexes...one as shown in the
plans and one the opposite hand...then joining them
on a common base and with a common crankshaft and
single larger flywheel to make a two cylinder
Simplex. A picture of Larry's twin is shown below as
a fine example of adding your own creativity to the
basic plans. For more info. check Larry's blog at
the link above.