O-Classes

O-classes means Outboard boats, where engines are outside of the vechicle. Some call O-classes as Open-Classes, where boat hull type is free and also engines can be freely modified in the limited cubature. There are three types of boat hulls mainly in use: hydroplane type, catamarane and runabout.

Hydroplane type hull, where driver is laying

O-250 1957

Catamarane type hull, where driver is sitting

O-250 ca 1960

Runabout type hull

In smaller classes (O-125 up to O-700) as fuel is used methanol. In bigger classes and in OSY-400 gasoline is used mainly.

O-175 1965, faster than World Speed Record

O-175 1968

O-250 Runabout ca 1955

O-250 1954

2008 Electrical hydro World Record 159 km/h Michal Bontoft