In association with The Vintage Hydroplanes The Vintage Builders Guide Part IV

The cowlings were being built with different shapes that would have lines to improve aerodynamics and help with stability. A fin built into the rear cowling was from the thought of helping stabilize the aft of the hull. Arguments can be made about the effectiveness of this idea.
 
 
 
 
 
 
 

There were also evolutions with regards to the "mechanicals" of a limited class hydroplanes. The skid fin which aids the cornering of the craft in the turns, was originally attached to the underneath of the hull inside the starboard sponsons. Somebody moved the skid fin out further and angled it slightly which was found to further aid the hull in the turns.
 
 
 
 

Another improvement was moving the 2 water pickups which were attached to the ends of each of the sponsons to a single pickup that was attached to the very bottom edge of the rudder. The water being picked up from this location was much cleaner and eliminated the one-way valves that needed to be used for the sponson water pickups. As you can see in this photo, there are many times when the sponson edges would be out of the water, which would interrup the water flow to the engine.
 

A dividing point in the history of the inboards was the cab-over which started being successful during the late 1960s. A few racers, (not builders) took regular conventionals and moved the cockpit up in front of the motor. Two of the conventionals that were converted were a Dick Sooy and Henry Lauterbach design. There may have been more of them.
 
 
 
 

The picklefork styled hydroplanes, with the driver in front (and currently, usually enclosed in a capsule), and the motor behind him, started making inroads in the late 1960's. In about 1963, Ron Jones started building round nosed cab-overs which stayed that way until about 1966, when shallow pickelforks were tried.
 
 
 
 
 
 

This was the beginning of the end of the traditionally styled, round nosed 3-point hydroplane with the driver seated in the aft of the hull that everybody was accustomed to seeing for about twenty-five years. During the early 1970's, the pickelforks on these racing hulls got deeper and became quite popular. They started dominating in most classes by 1977. But the conventionals weren't going away without a fight. Builders of the conventional hydroplanes such as Lauterbach, Farmer, Hallet, Milosivich, Karelson and Staudacher started making their transoms wider.
 

This idea helped keep those designed conventionals in the win columns right up to the late 1970's. Only in the extremely fast Grand Prix class did the Lauterbachs hold their own up until 1989.
These unique differences and evolution's only add to the wonderful history of the sport of Hydroplane Racing.
 
 
 
 
 

The personality of handcrafted, vintage hydroplane raceboats will remain as long as the spirit of vintage hydroplane racing is kept alive through the next generation. The former owners, drivers, designers, and builders of these racing crafts will be remembered for their innovation and skill through the documentation, preservation and restoration efforts of these unique flying hulls.