TWISTER 28

Sailboat Specifications

both US imperial metric

Hull Type:

Long keel w/trans. hung rudder

Rigging Type:

Masthead Sloop

LOA:

28.25 ft / 8.61 m

LWL:

21.50 ft / 6.55 m

Beam:

8.08 ft / 2.46 m

S.A. (reported):

348.00 ft² / 32.33 m²

Draft (max):

5.00 ft / 1.52 m

Displacement:

9,968 lb / 4,521 kg

Ballast:

4,628 lb / 2,099 kg

S.A./Disp.:

12.06

Bal./Disp.:

46.43

Disp./Len.:

447.76

Construction:

FG or Wood

First Built:

1964

Last Built:

1983

# Built:

200

Builder:

Uphams/Tyler (UK)

Designer:

Kim Holman

Sailboat Calculations

Definitions

S.A./Disp.:

12.06

Bal./Disp.:

46.43

Disp./Len.:

447.76

Comfort Ratio:

40.49

Capsize Screening Formula:

1.50

S#:

0.69

Rig and Sail Particulars

help

I:

34.00 ft / 10.36 m

J:

11.00 ft / 3.35 m

P:

30.00 ft / 9.14 m

E:

10.75 ft / 3.28 m

S.A. Fore:

187.00 ft² / 17.37 m²

S.A. Main:

161.25 ft² / 14.98 m²

S.A. Total (100% Fore + Main Triangles)

348.25 ft² / 32.35 m²

S.A./Disp. (calc.):

12.07

Est. Forestay Len.:

35.74 ft / 10.89 m

Sailboat Links

Designers:

Kim Holman

Builders:

Tyler Boat Co. Ltd. (UK)

Upham (UK) (J. W. and A. Upham Ltd.)

Associations:

Twister Class Association

Download Boat Record:

PDF

Notes

First available in wood, then with FG hulls with wood coachroof and deck. By 1970, an all glass version was available. It is thought that the glass boats were molded by Tyler Boat Co. Ltd. and finished and fitted out by other yards.

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