Suggestions to Preston Briggs
This site was last updated on February 15, 2008.
These are computer-generated renderings from Mark Rudner, showing the design of his shutoff. He has since redesigned it, shrinking it considerably (see below).
It's basically a line-pull shutoff, with the following advantages:
A top view, when line tension is applied.
A top view, when line tension is released.
A view of the engine unit, when line tension is applied.
The photos below are from Howard Rush and show the actual parts.
The bellcrank axle.
The remaining photos show details of the engine unit, where the fuel line is actually pinched off.
There are only two parts.
From the front.
From the bottom.
The back side (toward the engine).
Here are pictures from Mark showing the redesigned shutoff.
Mounted to a plane.
From the side.