Selden 22 - Sheet Arrangement

10
Up the mast
The advantage of routing the sheet up the mast and back to the cockpit is to keep the foredeck clean
from lines. The sheet is led from the car, up the front of the mast and into the mast through a sheave box
installed at a height of 50% of the fore triangle. The sheet exits the mast through a slot tting and turns
through a block at the foot of the mast and back to the cockpit. The deck light and the steaming light on
the mast might need to be relocated. Sheet cranes are available for boats tted with Vertical Pole Stowage
(VPS) system. See options page 18.
To avoid over loading the sheave box in the mast, a 2:1 purchase on the
sheet and consequently a single becket block for the car is required.
The track to be angled 80° to the horizontal plane.
The load on car and block arrangement is approximate the sheet load x 1.5.
3.3 Sheet arrangement
There are two common ways to set up a sheet arrangement for a self-tacking system.
The sheet can be led over the fore deck or up the mast.
The routing of the sheets aects:
• The angle of the track
• The radius of the track
• The load on the car
Over the fore deck
This is the simplest and most common arrangement. The sheet is led from the clew of the sail,
through a single block on the car, to a block at the bow and back to the cockpit.
The track to be angled 35° to the horizontal plane.
The load on the car and block is approximate sheet load x 1.75.
80º
35º
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