| Main features | Marlow Hunter 31 Deep draft | Marlow Hunter 31 Furling mainsail | Marlow Hunter 31 Shoal draft |
Model | Marlow Hunter 31 | Marlow Hunter 31 | Marlow Hunter 31 |
Version | Deep draft | Furling mainsail | Shoal draft |
Hull type | Monohull | Monohull | Monohull |
Category | Cruising sailboat | Cruising sailboat | Cruising sailboat |
Sailboat builder | Marlow Hunter | Marlow Hunter | Marlow Hunter |
Sailboat designer | |||
Country | United States | United States | United States |
Construction | GRP (glass reinforced polyester): - Hull: Single skin fiberglass vinylester with Kevlar reinforcements - Deck: Sandwich balsa fiberglass vinylester | GRP (glass reinforced polyester): - Hull: Single skin fiberglass vinylester with Kevlar reinforcements - Deck: Sandwich balsa fiberglass vinylester | GRP (glass reinforced polyester): - Hull: Single skin fiberglass vinylester with Kevlar reinforcements - Deck: Sandwich balsa fiberglass vinylester |
First built hull | 2015 | 2015 | 2015 |
Last built hull | Still in production | Still in production | Still in production |
Appendages | Keel : L-shaped keel (with bulb) | Keel : L-shaped keel (with bulb) | Keel : wing keel |
Helm | Single helm wheel | Single helm wheel | Single helm wheel |
Rudder | Single spade rudder | Single spade rudder | Single spade rudder |
Unsinkable | No | No | No |
Trailerable | No | No | No |
EC design category iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)A: Wind < force 9, Waves < 10m B: Wind < force 8, Waves < 8m C: Wind < force 6, Waves < 4m D: Wind < force 4, Waves < 0,5m | A | A | A |
| Main dimensions | Marlow Hunter 31 Deep draft | Marlow Hunter 31 Furling mainsail | Marlow Hunter 31 Shoal draft |
Overall length | 32’ 4”9.86 m | 32’ 4”9.86 m | 32’ 4”9.86 m |
Hull length | 31’ 11”9.73 m | 31’ 11”9.73 m | 31’ 11”9.73 m |
Waterline length | 29’ 8”9.04 m | 29’ 8”9.04 m | 29’ 8”9.04 m |
Beam (width) | 11’ 10”3.61 m | 11’ 10”3.61 m | 11’ 10”3.61 m |
Draft | 5’ 5”1.65 m | 5’ 5”1.65 m | 4’ 5”1.35 m |
Mast height from DWL | 46’ 7”14.19 m | 51’ 11”15.82 m | 46’ 7”14.19 m |
Light displacement (MLC) | 11854 lb5377 kg | 11854 lb5377 kg | 12000 lb5443 kg |
Ballast weight | 3380 lb1533 kg | 3380 lb1533 kg | 3525 lb1599 kg |
Ballast type | Cast iron | Cast iron | Cast iron |
| Rig and sails | Marlow Hunter 31 Deep draft | Marlow Hunter 31 Furling mainsail | Marlow Hunter 31 Shoal draft |
Upwind sail area | 581 ft²54 m² | 543 ft²50.4 m² | 581 ft²54 m² |
I iFore triangle height (from mast foot to fore stay top attachment) | 35’ 10”10.9 m | 35’ 10”10.9 m | 35’ 10”10.9 m |
J iFore triangle base (from mast foot to bottom of forestay) | 11’ 4”3.43 m | 11’ 4”3.43 m | 11’ 4”3.43 m |
P iMainsail hoist measurement (from tack to head) | 36’ 6”11.11 m | 41’12.49 m | 36’ 6”11.11 m |
E iMainsail foot measurement (from tack to clew) | 13’ 10”4.22 m | 14’ 7”4.45 m | 13’ 10”4.22 m |
Rigging type | Sloop Marconi (in-mast furling mainsail) fractional | Sloop Marconi (in-mast furling mainsail) fractional | Sloop Marconi (in-mast furling mainsail) fractional |
Mast configuration | Deck stepped mast | Deck stepped mast | Deck stepped mast |
Rotating spars | No | No | No |
Number of levels of spreaders | 2 | 2 | 2 |
Spreaders angle | Swept-back (Bergström) | Swept-back (Bergström) | Swept-back (Bergström) |
Spars construction | Aluminum spars | Aluminum spars | Aluminum spars |
Standing rigging | 1x19 strand wire | 1x19 strand wire | 1x19 strand wire |
| Performances | Marlow Hunter 31 Deep draft | Marlow Hunter 31 Furling mainsail | Marlow Hunter 31 Shoal draft |
Upwind sail area to displacement iThe 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 25 it indicates a fast sailboat. | 189 ft²/T17.59 m²/T | 177 ft²/T16.42 m²/T | 188 ft²/T17.45 m²/T |
Displacement-length ratio (DLR) iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The 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. | 206 | 206 | 209 |
Ballast ratio iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.The higher the ballast ratio is, the greater is the stability. | 29 % | 29 % | 29 % |
Critical hull speed iAs 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. | 7.30 knots | 7.30 knots | 7.30 knots |
| Auxiliary engine | Marlow Hunter 31 Deep draft | Marlow Hunter 31 Furling mainsail | Marlow Hunter 31 Shoal draft |
Engine(s) | 1 inboard engine | 1 inboard engine | 1 inboard engine |
Engine(s) power (min./max.) | 21 HP / 29 HP | 21 HP / 29 HP | 21 HP / 29 HP |
Fuel type | Diesel | Diesel | Diesel |
Fuel tank capacity | 21.1 gal80 liters | 21.1 gal80 liters | 21.1 gal80 liters |
| Accommodations and layout | Marlow Hunter 31 Deep draft | Marlow Hunter 31 Furling mainsail | Marlow Hunter 31 Shoal draft |
Cockpit | Closing aft cockpit with opening system | Closing aft cockpit with opening system | Closing aft cockpit with opening system |
Cabin(s) | 2 | 2 | 2 |
Berth(s) (min./max.) | 4 / 6 | 4 / 6 | 4 / 6 |
Head(s) | 1 | 1 | 1 |
Freshwater tank capacity | 50.2 gal190 liters | 50.2 gal190 liters | 50.2 gal190 liters |
Holding tank capacity | 19.8 gal75 liters | 19.8 gal75 liters | 19.8 gal75 liters |
Boiler capacity | 5 gal19 liters | 5 gal19 liters | 5 gal19 liters |
Maximum headroom | 6’ 4”1.91 m | 6’ 4”1.91 m | 6’ 4”1.91 m |