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H. Zorab and K Bourgonje (NL)

Impala Specifications

Main Specs
Length, m 6.70
Beam, m 2.30
Draft, m 1.10
Displacement, kg 480.00
Classification
Hull Type Lifting keel w/bulb; trans. hung rudder
Hull Material GRP
Rigging and Keel
Rig Fractional Sloop
Keel Iron
Max Draft, m 1.10
Min Draft, m 0.30
Manufacturer Information
Shipyard H. Zorab and K Bourgonje (NL)
# Built 250
Association sailhorse.nl/
Period of manufacturing 1970 - 1970
Technical Specs
LOA, m 6.70
Sail Area (S.A.), m² 19.91
Ballast, kg 150.00
Sailboat Calculations
× S.A. / Displacement Formula
SA/D = SA (ft²) ÷ [Disp (lbs) / 64]^0.666
A sail area/displacement ratio below 16 would be considered under powered; 16 to 20 would indicate reasonably good performance; above 20 suggests relatively high performance.
× Ballast / Displacement Formula
Bal./Disp = ballast (lbs)/ displacement (lbs)*100
A Ballast/Displacement ratio of 40 or more translates into a stiffer, more powerful boat that will be better able to stand up to the wind.
× Capsize Screening Formula
CSF = Beam ÷ (Disp in cubic ft)^(1/3)
Designed to determine if a boat has blue water capability. The CSF compares beam with displacement since excess beam contributes to capsize and heavy displacement reduces capsize vulnerability. The boat is better suited for ocean passages (vs coastal cruising) if the result of the calculation is 2.0 or less. The lower the better.
S.A. / Displacement 33.08ℹ️
Ballast / Displacement, % 31.25ℹ️
Capsize Screening Formula 2.96ℹ️