Todd, thank you. Although our goal is not to reach top speed but scale speed some of the boats are pretty fast. When we started the whole 152VO story we were really astonished how efficient these old hull designs are. The slowest of our models (e.g. the cottage racer utilities) run at velocities around 30-35 km/h (i.e. around 20 mph). The fast ones like Hal Kelly's Foo Ling, the Speedliners or the Switzercrafts come close to 60 km/h (37 mph). A three pointer like the Kelly Jupiter or Wetback is capable to hit the 60 km/h mark.

But if you run that fast the boats don't look "realistic" anymore. That's why we limited the motor revs, propellers and battery voltage in our racing rules. An average 152VO race boat runs something around 40-45 km/h (25-28 mph). If you extrapolate this model speed by it's scale to the speed of a full size hull (25 respectively 28 mph x square root 5.2) our models would run something around 57 - 64 mph. That's still a bit faster than the originals in the mid 1950s (maybe a DSH or F Hydro could beat this speed), but it looks pretty realistic.

A slow one... around 20 mph:



A fast one... running full throttle over the scratch line, around 30 mph:



Our microprocessor controlled, programmable starting clock, based on an original of the 1950s: