C&C 40-1 — Sailboat Guide

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C&C 40-1 1970

C&C 40-1 is a 39′ 6″ / 12.1 m monohull sailboat designed by C&C Design and built by C&C Yachts starting in 1970.

Designer C&C Design Builder C&C Yachts Associations ? # Built ? Hull Monohull Keel Fin Rudder Spade Construction FG

Dimensions

Length Overall 39′ 6″ / 12.1 m Waterline Length 28′ 8″ / 8.8 m Beam 11′ 8″ / 3.6 m Draft 6′ 11″ / 2.1 m Displacement 18,790 lb / 8,523 kg Ballast 7,910 lb / 3,588 kg (Lead)

Rig and Sails

Type Sloop Reported Sail Area 756′² / 70.2 m² Total Sail Area 755′² / 70.1 m²

Mainsail

Sail Area 348′² / 32.3 m² P 43′ 6″ / 13.3 m E 16′ 0″ / 4.9 m Air Draft ?

Foresail

Sail Area 407′² / 37.8 m² I 49′ 11″ / 15.2 m J 16′ 3″ / 5 m Forestay Length 52′ 6″ / 16 m Advertisement

Auxilary Power

Make ? Model ? HP ? Fuel Type ? Fuel Capacity 26 gal / 98 l

Accomodations

Water Capacity 100 gal / 379 l Holding Tank Capacity ? Headroom ? Cabins ?

Calculations

Hull Speed 7.1 kn Classic: 7.18 kn

Hull Speed

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Formula

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311 Hull Speed = Max Speed/Length ratio x √LWL

7.13 knots Classic formula: 7.18 knots Sail Area/Displacement 17.1