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Sailboat Specifications for LUDERS 21

Technical Specifications

Hull Type
Finn Keel w/bulb
LOA
21.25ft.
6.48m.
LWL
16ft.
4.88m.
Beam
5.58ft.
1.7m.
Draft(max)
3ft.
0.91m.
Displacement
1500lbs.
680kgs.
Ballast
435lbs.
197kgs.

Production

Designer
A. E. Luders
Builder
Ron Rawson Inc./ American Plastics Inc. (USA)
Construction Material
Fiberglass
Production Start
1967

Rigging and Sails

Rig Type
Fractional Sloop
Listed Sail Area
139sq.ft.
12.91sq.m.
Fore Sail Area
49.5sq.ft.
4.6sq.m.
I
18ft.
5.49m.
J
5.5ft.
1.68m.
E
8.25ft.
2.51m.
P
21.5ft.
6.55m.
Sail to Displacement Ratio
16.91

PHRF Rating

High
264
Low
264
Average
264
Source
US Sailing
More Details
Rig Dimensions

Performance Calculations

Maximum Hull Speed
5.36 kts.
Capsize Screening Formula
1.95
Sail Area/Displacement (SA/D)
16.97
(Cruiser-Racer)
Displacement/Length (D/L)
163.49
(Light Displacement)
Motion Comfort Ratio
12.43

Note: The performance calculations are theoretical numbers which are calculated off the specifications of the vessel and should be used for educational purposes only. For actual performance statistics contact the manufacturer of the vessel.

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