This design was costing me more time as I thought it would.
But the result is precise what I wanted.
An easy to built boat with a lot of possibilities for the weekend sailor.
With its beam of only 2,30m (7 feet 8 inches) easy to trailer.
Quick to set up on the sailing ground . The light windsurf
masts with there extensions are set in minutes .
Fast sailor which can handle a lot of wind through the low center of pressure through the parallel (biplane) rig.
The sail is wound around the masts for easy handling. The roller/sails can be handled from the cockpit.
A small cabin for gears and a toilet. With some provisions two persons can sleep on the boat.
Big cockpit for exciting or lacy days on the water.
Best of all, you would not be broke at launch day.
The boat is easy to build. An average amateur can built the boat in circa 300 hours.
We use the time proven matched hole technique adapted from aluminum aircraft construction. No strong back is needed to build the boat. The a-symmetrical hulls are self aligning.
Like all my other designs the proven plywood/ glass/Epoxy system is used.
A lot of hardware can be build to safe money, for example gudgeons, sail rollers, booms and boom rotator.
33 drawings and an almost step by step instruction will give the builder the confidence to successful build this boat.
But the result is precise what I wanted.
An easy to built boat with a lot of possibilities for the weekend sailor.
With its beam of only 2,30m (7 feet 8 inches) easy to trailer.
Quick to set up on the sailing ground . The light windsurf
masts with there extensions are set in minutes .
Fast sailor which can handle a lot of wind through the low center of pressure through the parallel (biplane) rig.
The sail is wound around the masts for easy handling. The roller/sails can be handled from the cockpit.
A small cabin for gears and a toilet. With some provisions two persons can sleep on the boat.
Big cockpit for exciting or lacy days on the water.
Best of all, you would not be broke at launch day.
The boat is easy to build. An average amateur can built the boat in circa 300 hours.
We use the time proven matched hole technique adapted from aluminum aircraft construction. No strong back is needed to build the boat. The a-symmetrical hulls are self aligning.
Like all my other designs the proven plywood/ glass/Epoxy system is used.
A lot of hardware can be build to safe money, for example gudgeons, sail rollers, booms and boom rotator.
33 drawings and an almost step by step instruction will give the builder the confidence to successful build this boat.
updated 01/22/2012
Copyright © 2012 by B. Kohler
All rights reserved
All rights reserved
DUO 480 C
Bill of materials
Specification
L.o.a. 4.80 m
Beam 2.30 m
Beam c/c 2.06 m
Empty weight 180 kg
Weight max. CWL 450 kg
Sails 2 x 8 m²
L/B ratio hulls 1 : 13,55
Construction plywood/glass/epoxy composite
Hulls a-symmetrical
Rudder automatic
Quick building system
Construction time about 300 hours
L.o.a. 4.80 m
Beam 2.30 m
Beam c/c 2.06 m
Empty weight 180 kg
Weight max. CWL 450 kg
Sails 2 x 8 m²
L/B ratio hulls 1 : 13,55
Construction plywood/glass/epoxy composite
Hulls a-symmetrical
Rudder automatic
Quick building system
Construction time about 300 hours
List of drawings and list of contends
Construction
Side and top view
Plan cost US $ 80,-