I built this little wobbler around
the same time period as the vertical engine, ('95-'96)
They're really kind of fun to watch, and their value is definitely in
the entertainment realm.
I put pictures of this one on an old website I used to have, just
to show it,
and promptly got a bunch of emails asking where I bought it.
After a few weeks of
that, I made up ten of them, which took me about a week, and I put a
notice on the page
that displayed this engine that I had some for sale. I sold nine
of the ten in about a month.
I still have this one, which was the first one I made, and I have one
from the batch of ten
that didn't sell. I had never intended to make these to sell, but
sometimes it just works
out that way.
The engine is basically 1/2" square bar stock and 1/4" X 2" aluminum,
with a brass flywheel
and a few pins and other odds 'n ends. There are plans for these
little things all over the web,
though I had no plans for this one. Except for the intake and
exhaust port geometry, there is
nothing really critical on these little runners. They really go,
too. Fast enough that all the parts
are a smooth blur, though they won't idle down much slower than about
Back around 1995, when I had a 10" lathe, I made a large wobbler with a
one inch bore. It had
about a 1 1/2" stroke. I have
no pictures of that one, and it's long since been lost in the shuffle.
It took about 15 psi to run it and wasn't near as fun to watch as
the little one you see here.
Small seems to be the way to go for wobblers, and I've seen some really
small builds. The
smaller they are, the faster they go.