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Sailboat specifications and datasheets

Marlow Hunter 18

The Marlow Hunter 18 is a 18’4” dinghy designed by Glenn Henderson. She was built by Marlow Hunter (United States) and made of GRP (glass reinforced polyester). The production started in 2011 .
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Marlow Hunter 18's   Main Features
Model Marlow Hunter 18
Type of hull Monohull
Shipyard
Designer Glenn Henderson
Construction GRP (glass reinforced polyester)
First built hull 2011
Appendages Centerboard
Helm 1 tiller
Rudder 1 transom hung rudder
Unsinkable Yes
Trailerable Yes
EC certification D
Standard public price (indicative only) N/A
Marlow Hunter 18's   Main dimensions
Hull length 18’ 4”
Waterline length 16’ 6”
Beam (width) 7’ 2”
Draft 4’ 4”
Draft when appendages up 0’ 6”
Mast height from DWL 24’ 6”
Light displacement 836 lbs
Maximum displacement 1770 lbs
Capacity 935 lbs
Marlow Hunter 18's   Rig and sails
Upwind sail area 170 sq.ft
Downwind sail area 381 sq.ft
Rigging type Sloop Marconi fractional
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire continuous
Number of levels of spreaders 1
Spreaders angle Swept-back
Marlow Hunter 18'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.
30.15
Downwind 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.
67.58
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.
84
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.
5.44 knots

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