60' Trading Schooner
JASPER
A Charter / Trading Schooner Concept
Larger Aft View | Portside View | View from ForwardCopyright 2009 Michael Kasten
General Concept
This 60' schooner is derived from the 40' Benrogin and the 48' Jasmine hull form, with sufficient displacement and interior space to have a "modular" cargo hold or "trade" area. The model shown here is preliminarily named "Jasper."
Preliminary data and dimensions are:
- Displacement 92,000 lb
- Length over Bulwark Rails 61 ft
- Beam on Deck 18 ft
- Immersed depth 7.6 ft
- WL Length 52.3 ft
- WL Beam 16 ft
As a prototype, the draft, beam, length, displacement, etc. all can be adjusted to suit. The transom stern has been used in order to maximize the WL length for a given length on deck. Likewise the relatively upright bow balances the stern profile perfectly.
Though rounded, the hull is designed for easy plating. The only areas with sufficient transverse curvature to require forming are in the area of the turn of the bilge, where there would ordinarily be a "radius" chine. Rather than that, we prefer to use an all-rounded shape, but one which makes use of only a gentle curve in the topsides and bottom for the sake of easy plating with flat sheet materials. This is just as easy to build as a radius chine, and the result is vastly more appealing.
The keel is a NACA foil, as is the rudder and skeg combination. The keel is modernized in profile for the sake of optimum windward sailing and the combined rudder / skeg will provide good tracking, The sweep-back of the keel is a benefit when sailing off the wind, since the forefoot is not so deep like the clipper ships, so will not dig into the trough when sailing fast downwind.
The pilot house is shown with full headroom, perched right on the deck. Ideally, it would be recessed into the deck a bit in order to reduce overall height. The interior layout can be whatever suits the intended purpose. The flush fore deck would have a large cargo hatch above the forward "hold" or "trade" area.
The concept of the "trade" area is that it could have a modular stateroom or pair of staterooms that could be easily dismantled, allowing other uses. Other possible "trade" concepts would be as a scientific research station, portable recording or movie studio, seminar space, hospital for remote regions, or cargo hold for light packets, say for a relief operation or medical supplies, etc.
A gaff schooner rig has been planned and would make use of aluminum pipe for spars, with modern sail materials having a performance-oriented sail cut. A raffee and square-course on the fore mast would also be very fitting. Combined with a set of main stays'ls, the rig would then be that of a brigantine. Whether schooner or brigantine rigged, our primary vision for this design is fast cruising, windward ability, simplicity of materials, ruggedness, reasonableness of cost to build and maintain.... all wrapped in a classic schooner hull type.
For more information please inquire.
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