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Class Build Specification

Specification for
Royal Mersey Restricted Class

Scantlings shall not be less than the following finished sizes:-

Keel 3 ½ in. thick in wake of centreboard case.
Transom 1 1/4 in. sided.

Timbers, all steamed, 1 ¾ x 1 1/8 in. spaced 9 inches centre to centre at heels. All timbers to be properly joggled into keel when practicable where they do not cross same.

Produced by Chris Hankin Dec 2017
Royal Mersey Yacht Club Restricted Class Sail Plan

Floors, not less than four grown floors 3 in. x 2 ½ in. at throats tapered to ends. Iron knees galvanized 2 in. x 3/8 in. Three to be fitted each side of centreboard case. Total length not to be less than 7 ft. 6 in. on each side.

Centreboard case, Sides 1½ in. thick.
Planking - One inch finished on the boat. Hood ends to be not less than ¾ in. allowing fair taper.
Clamps - 4 in. x 1 in. tapered to 3 in. at ends.
Bilge Stringers – 3 ½ in. x 1 in. tapered to 2 in. at ends.
Decks caulked not less than 1 1/8 in. finished, Decks covered with canvas or linoleum, not less than 7/8 in. finished without covering.
Deck beams - 2 in. by 1 ¾ in. at centres, fair taper to ends, spaced 18 in. The 3 Deck beams at the mast, fore-end coachroof and after-end cockpit 2 ½ in. x 2 ½ in. at centres, fair taper to ends.
Carlings for coachroof and cockpit 2 ½ in. x 2 ½ in, well kneed.
Coamings for coachroof 7/8 in. finished hardwood.
Beams coachroof 1¼ in. x 1¼ in. spaced 8 in. centres.
Top of coachroof ¾ in. canvas covered. No racing hatch in coachroof. Any skylight not to exceed 30 in. x 20 in. measured inside coamings and to be a fixture and not to be used as a racing hatch. No sliding hatch to exceed 24 in. x 21 in. in the opening.
Floor of Cabin and Cockpit – 7/8 in. thick
Cabin seats and risers – ¾ in. thick.
Chain 25 fathoms – 5/16 in. or an equivalent weight of ¼ in. chain.
Main Anchor 40 lbs., kedge 20 lbs. 20 fathoms 1¾ warp.
Construction and Body Plan
Scale 1" = 1ft
Digitised and cleaned by Chris Hankin Dec 2017
Digitised and cleaned copy by Chris Hankin (Dec 2017) from a redraw by Ewan Joughim (Jan 1988).