Lightning

1938
insignia

Dimensions

Length Overall
18 11 / 5.8 m
Waterline Length
15 3 / 4.7 m
Beam
6 5 / 2 m
Draft
0 5 / 0.1 m 4 11 / 1.5 m
Displacement
700 lbs / 318 kg
Ballast
130 lbs / 59 kg
drawing

Rig and Sails

Type
Fractional Sloop
Reported Sail Area
172 ft2 / 16 m2
Total Sail Area
189.1 ft2 / 17.6 m2
Mainsail
Sail Area
120 ft2 / 11.2 m2
P
24 0 / 7.3 m
E
10 0 / 3.1 m
Mast Height
?
Foresail
Sail Area
69.1 ft2 / 6.4 m2
I
20 0 / 6.1 m
J
6 11 / 2.1 m
Forestay Length
21 1 / 6.5 m

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
5.23 knots
Sail Area/Displacement
34.91
high performance
Ballast/Displacement
18.57
less stiff, less powerful
Displacement/Length
88.11
Ultralight
Comfort Ratio
5.42
lightweight racing boat
Capsize Screening
2.93
better suited for coastal cruising

Notes

One of the most popular one-design classes in the US since the 1940’s. But fleets also exist in other parts of the world.
Although originally designed for wood planked construction, nearly all boats since the early 1960’s have been built of fiberglass.
Ballast above is max weight of centerboard.


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