Cory Schaffhausen's V15
Cory Schaffhausen from Minneapolis, MN, USA, built his adaptation of Rick Willoughby's V15 design in his garage between July, 2011, and July, 2012. In his blog he describes every step of the process, and how he now enjoys the completed boat, but he is also including thoughts about what he would change if he were to do it all over, and… thoughts of building yet another boat.
Cory Schaffhausen on his V15 on the water
The boat on its dolly in front of the garage, stabilizers swiveled in
Discreet but efficient: the rudder control
Before the switch to a center flex shaft
propulsion system, this
steerable prop/drive leg was in operation.
Main technical data
Length: 20 ft (~ 6 m)
Weight: 70 lb (31.75 kg)
Beam Main Hull: … mm
Beam Overall: 6.5 ft (~ 2 m)
Design Displacement: … kg
Cruising speed: 8–9.5 km/h ( 5.5-6 mph) at 72-78 rpm
Top speed: … km/h (over … knots)
Propulsion system: flexible shaft, center mounted*, custom bevel gear and chain gearbox, 6.5X ratio, folding prop (by Rick Willoughby)
Hull: Fibreglass/Epoxy over 4mm marine plywood, varnish finish
Seat: integrated in the hull
Steering system: stern rudder
Stabilizing system: twin hulls, beam overall … m
*the flexible shaft is running inside the main hull, under the seat, and through a tube along the rear deck, to the stern.