The lateen-rigged felucca in Hiscox figure 768 carries two masts, two triangular lateen sails and a jib. Each lateen sail is supported by an inclined yard; the halyard hoists the yard, while tack and sheet lines control its lower corners.
Lateen-rigged Felucca Interactive Calculator
Explore yard, mast, halyard-point and rake-offset dimensions in the lower one-yard hoisting view. The upper view identifies the two-masted felucca rig.
Equation Used
- Ratios use the same boat-length reference.
- Mast is straight and rake is planar.
- The halyard point is measured from the yard heel and placed at the entered fraction.
- No hull-form, sail-balance, line-load, structural, material or stability model.
Every ratio is a user assumption; the drawing is not a historical reconstruction or design standard.
Proportional connected rig
Boat length sets the entered yard and mast dimensions. Mast rake sets the planar top offset. The halyard attaches at the entered fraction from the yard heel; tack and sheet complete the visible control triangle.
Layout arithmetic only
The visual helps interpret entered proportions but does not establish traditional felucca dimensions or seaworthiness.
Entered proportions
yard=Lry, mast=Lrm, halyard distance=yard fh and rake offset=mast tan(rake).
Reading the animation
The upper view shows the two lateen sails and jib. In the lower view, the gold yard turns about its restrained heel as the green halyard is taken in or eased over the masthead. Its attachment remains at the entered fraction along the yard. The flexible sail outline and hoisting range are illustrative.
Rigging references and model limits
The upper two-masted layout follows Hiscox figure 768. The lower running-rigging illustration follows the Mallorca Maritime Museum description. Entered ratios are not claimed as historical standards; hull form, sail balance, rig loads, materials, scantlings and stability are absent.
Questions
Are ratios traditional standards?
No. They are entered assumptions.
Is the halyard point drawn from the calculation?
Yes, but only as planar proportional geometry.
References & Further Reading
- Wikipedia contributors. Lateen. Wikipedia
Building or designing a mechanism like this?
Explore the precision-engineered motion control hardware used by mechanical engineers, makers, and product designers.
