This
intriguing two-cylinder motor is a Caille factory racer.
Its most unusual feature is its tractor propeller. Positioned
in
"clean" water ahead of the lower unit, such a prop
operated at peak efficiency but could present a challenge to
the driver in terms of control, thanks to the high torque produced.
Here
is a rare Tomahawk Class B racer powered by a beautiful 1954
Mercury Mark 20H.