150 ft. Grand Illusion X.L.
Grand Illusion - the boat
Specifications
Type: sail assisted power catamaran.
Design mandate: fast, ocean going, all round day boat / camping cruiser
Length overall: 78 ft.
Length waterline: 72 ft.
Beam overall: 18 ft.
Draft loaded: 2 ft.
Maximum hull beam: 4 ft.
Hull beam at transom: 4 ft.
Waterline length / hull beam ratio: 18 / 1
Hull height (chine to gunwale) from main cross beam aft: 4 ft
Hull height (chine to gunwale) from main cross beam fwd. 6 ft.
Deadrise: 45 degrees
Estimated dry weight: 24,000 lbs.
Decks: 2
Main deck layout:
4 "center consoles" 12 ft w. X 2 ft d. X 32 ins. h. @ 8ft. spacing
1 "center console " 6 ft w. X 2 ft d. X 32 ins. h.
6ft diameter "cold tub" / baitwell"
2ft. h. X 1 ft d. bulwarks with 2 ft long livebait wells and storage units.
Construction:
Glass sheathed plywood / polystyrene foam - polyester resin above chine - epoxy below.
100% polystyrene foam below chines except for full length 2 ft deep plywood keelsons
2 X 2 panel stiffeners above chines. at 16 in. spacing
Main cross beam (mast step): 4 in. w. X 24 in h. plywood box beam with heavy glass sheathing.
Bulkhead spacing : 8 ft.
Auxillary cross beams: 4 in w. X 8 ins. h. plywood box beams with heavy glass sheathing. at 8 ft spacing.
Underwing longtitudianal beams: 4 ins w X 5 ins h. laminated lumber beams
with heavy glass sheathing. at 2 ft spacing
Top deck - as shown in photos.
Fresh water: 320 gals 1n 4 s.s. tanks
Diesel: 320 gals in 4 s.s. tanks
Engines: 2 X 130 h.p. Volvo Pentas D3 with jack shafts and stern drives
Mast: 46 ft oval section with part synthetic standing rigging
Sails 2 genoas 1 spinnaker
Other canvas: a lot.
Projected cruise speed (engines only) : 14 - 18 knots
Projected top speed: (engines only) 20 knots
Projected top speed (sails and engines: P.D.Q.
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