[0036] fig. 5a is a front view of the high performance planing monohull sailboat with heeling control showing operation of the boat in light winds. [0037] fig. 5b is a front view of the high performance planing monohull sailboat with heeling control showing operation of the boat and reduction of the apparent weight of the boat.. Fig. 8 is a front view of the high performance planing monohull sailboat with heeling control showing the hydrofoil positions when running and reaching. fig. 9 is a front view of the high performance planing monohull sailboat with heeling control showing the hydrofoils in position to improve boat stability.. Displacement vs planing hulls; what is the definition? puffin is a deep draft sailing ketch with a dutch steel hull. my wife and i live aboard puffin and are currently slipped in charleston.
If the boat is doing around 5 knots the second wave will be about 16ft behind the bow wave. so a 16ft boat would be at hull speed, an 8ft boat would be truly “planing” (it’s ok to use the word descriptively, but not technically) and a 25 footer would be well below hull speed. here is a picture of my sailing a goat island skiff at mooloolaba.. Planing boat theory first, a disclaimer. i do not consider myself an expert on the subject of boats planing, but more of an informed amateur with an engineering background who is interested in understanding how boats skim along on top of the water rather than plowing along through it.. In fact, according to girotti, beneteau did look at a number of more conventional monohull foils, like the imoca dali foils and the dss foil. but it concluded that a small boat like a figaro, just 32ft long, wouldn’t normally generate enough speed to overcome the drag created by these larger surfaces..
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