Sail Plan rules:


Basic Kestrel dimensions Main sail
Overall length 4.776 metres (15' 7 1/2 in) Leach length 6401 mm
Beam 1.75 metres (5' 6in) Width – half height 1981 mm including bolt rope
Bare hull weight 120 Kg (265 lbs.) Width – three-quarter height 1245 mm including bolt rope
Main 9.29 sq. metres (100 sq. ft.) Window area 186040 sq. mm
Foresail 4.8 sq. metres (52 sq. ft.) Width – headboard 102 mm
Spinnaker 11.15 sq. metres (120 sq. ft.) Length – top batten 1219 mm
Optimum weight 146 Kg (322 lbs.) Length – lower batten 838 mm
Portsmouth Yardstick (PY) 1038 Width – top batten end (square with luff) 1016 mm
Spinnaker  Foresail 
Hanging height 4572 mm Luff 4115 mm
Greatest width 2896 mm Leach 4064 mm
Half-height width (minimum 3/4 of n) 2896 mm max. Foot 2413 mm
Foot width (n) 2896 mm Head to half width on foot 4013 mm
Maximum roach on leach 102 mm
Window area 186040 sq. mm
Mast
Lower band Upper edge of band above datum on mast: 978 mm – 1004 mm
Upper band Lower edge of band above upper edge of lower band: 5791 mm
Boom band Distance from rear of mast track, to forward edge of limit band: 2730 mm
Spinnaker halyard exit No more than 4013 mm above top edge of lower band