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Sailboat specifications and datasheets

Oyster Lightwave 395

The Oyster Lightwave 395 is a 39’6” monohull sailboat designed by Carl Schumacher. She was built by Oyster (United Kingdom) and made of GRP (glass reinforced polyester). This sailboat was produced between 1988 and 1990 with 31 hulls completed.
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Oyster Lightwave 395's   Main Features
Model Oyster Lightwave 395
Type of hull Monohull
Category Cruiser-racer sailboat
Shipyard
Designer Carl Schumacher
Construction GRP (glass reinforced polyester)
First built hull 1988
Last built hull 1990
Number of hulls built 31
Appendages Keel :
Fin without bulb
Helm 1 wheel
Rudder 1 spade rudder
Cockpit Closed aft cockpit
Unsinkable No
Trailerable No
Standard public price ex. VAT (indicative only) N/A
Oyster Lightwave 395's   Main dimensions
Hull length 39’ 6”
Waterline length 33’ 10”
Beam (width) 11’ 10”
Draft 6’ 11”
Light displacement 11001 lbs
Oyster Lightwave 395's   Rig and sails
Upwind sail area 732 sq.ft
Rigging type Sloop Marconi masthead
Rotating spars No
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire
Number of levels of spreaders 2
Spreaders angle 0 °
IiFore triangle height (from mast foot to fore stay attachment) 52’ 2”
JiFore triangle base (from mast foot to bottom of forestay) 15’ 4”
PiMainsail hoist measurement (from tack to head) 45’ 4”
EiMainsail foot measurement (from tack to clew) 14’ 10”
Oyster Lightwave 395's   Performances
Upwind sail area to displacementiThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.
The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size. Upwind : under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 23 it indicates a fast sailboat.
23.29
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).
The DLR can be used to compare the relative mass of different sailboats no matter what their length: a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.
129
Hull speediAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed".
The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34.
7.79 knots
Oyster Lightwave 395's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Fuel type Diesel

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