← All comparisons

F1 vs K3

How do the F1 and K3 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.

F1 F1 Topcat · 1977 K3 K3 Topcat · 1999
F1K3
Length overall 15.7 ft4.79 m 16.1 ft4.91 m
Waterline length
Beam 6.6 ft2.00 m 7.3 ft2.21 m
Draft
Displacement 254 lb115 kg 304 lb138 kg
Ballast
Sail area 121 ft²11.2 m² 160 ft²14.9 m²
SA / Displacement 48.27 56.62
Displacement / Length
Comfort ratio
Capsize screening 4.14 4.31
Hull speed (kn)

F1 vs K3: the short version

Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.