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Diamond Head vs Impulse

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

Diamond Head Diamond Head Impulse Impulse Tim Wilson Yacht Design · 1975
Diamond HeadImpulse
Length overall 12.8 ft3.91 m 13.1 ft4.00 m
Waterline length
Beam 1.9 ft0.59 m 4.9 ft1.51 m
Draft 2.0 ft0.61 m
Displacement 22 lb10 kg 104 lb47 kg
Ballast
Sail area 83 ft²7.7 m²
SA / Displacement 60.05
Displacement / Length
Comfort ratio
Capsize screening 2.77 4.20
Hull speed (kn)

Diamond Head vs Impulse: the short version

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