Achilles 840

1979
Designer
Chris Butler
Builder
Butler Mouldings Ltd.
Association
Achilles Yachts Owners Assoc.
# Built
?
Hull Type
Fin with rudder on skeg
Construction
FG/balsa core deck

Dimensions

Length Overall
27 9 / 8.5 m
Waterline Length
24 2 / 7.4 m
Beam
8 11 / 2.7 m
Draft
4 11 / 1.5 m
Displacement
5,500 lbs / 2,495 kg
Ballast
2,500 lbs / 1,136 kg (Iron)
drawing

Rig and Sails

Type
Masthead Sloop
Reported Sail Area
354 ft2 / 32.9 m2
Total Sail Area
353.6 ft2 / 32.9 m2
Mainsail
Sail Area
151.1 ft2 / 14 m2
P
31 0 / 9.5 m
E
9 8 / 3 m
Mast Height
?
Foresail
Sail Area
202.5 ft2 / 18.8 m2
I
35 4 / 10.8 m
J
11 5 / 3.5 m
Forestay Length
37 1 / 11.3 m

Auxilary Power

Make
Volvo
Model
2001
HP
9
Fuel Type
Diesel
Fuel Capacity
26 gal / 98 l

Accomodations

Water Capacity
18 gal / 68 l
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
6.6 knots
Sail Area/Displacement
18.18
good performance
Ballast/Displacement
45.55
stiffer, more powerful
Displacement/Length
172.18
light
Comfort Ratio
17.88
lightweight racing boat
Capsize Screening
2.04
better suited for coastal cruising

Notes

Available bilge/twin or triple keels.


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