| Main features | Longbow Sloop | Longbow Ketch |
Model | Longbow | Longbow |
Version | Sloop | Ketch |
Hull type | Monohull | Monohull |
Category | Cruising sailboat | Cruising sailboat |
Sailboat builder | Westerly | Westerly |
Sailboat designer | ||
Country | United Kingdom | United Kingdom |
Construction | Hull and deck: GRP (glass reinforced polyester) | Hull and deck: GRP (glass reinforced polyester) |
Number of hulls built | 265 | 265 |
First built hull | 1971 | 1971 |
Last built hull | 1980 | 1980 |
Appendages | Keel : fin without bulb | Keel : fin without bulb |
Helm | Single tiller | Single tiller |
Rudder | Single rudder on skeg | Single rudder on skeg |
Unsinkable | No | No |
Trailerable | No | No |
| Main dimensions | Longbow Sloop | Longbow Ketch |
Overall length | 31’ 2”9.5 m | 32’ 6”9.9 m |
Hull length | 31’ 2”9.5 m | 31’ 2”9.5 m |
Waterline length | 24’7.3 m | 24’7.3 m |
Beam (width) | 9’ 6”2.9 m | 9’ 6”2.9 m |
Draft | 4’ 6”1.38 m | 4’ 6”1.38 m |
Mast height from DWL | 41’ 7”12.67 m | 41’ 7”12.67 m |
Light displacement (MLC) | 8378 lb3800 kg | 8378 lb3800 kg |
Ballast weight | 3990 lb1810 kg | 3990 lb1810 kg |
| Rig and sails | Longbow Sloop | Longbow Ketch |
Upwind sail area | 540 ft²50.2 m² | 533 ft²49.5 m² |
Mainsail area | 207 ft²19.2 m² | 150 ft²13.9 m² |
Mizzen sail area | 54 ft²5 m² | |
Genoa area | 334 ft²31 m² | 329 ft²30.6 m² |
Solent area | 237 ft²22 m² | 237 ft²22 m² |
Jib area | 152 ft²14.1 m² | 152 ft²14.1 m² |
Stormjib area | 61 ft²5.7 m² | 61 ft²5.7 m² |
Rigging type | Sloop Marconi masthead | Ketch Marconi masthead |
Mast configuration | Deck stepped mast | Deck stepped mast |
Rotating spars | No | No |
Number of levels of spreaders | 1 | 1 |
Spreaders angle | 0 ° | 0 ° |
Spars construction | Aluminum spars | Aluminum spars |
Standing rigging | 1x19 strand wire continuous | 1x19 strand wire continuous |
| Performances | Longbow Sloop | Longbow Ketch |
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. | 222 ft²/T20.61 m²/T | 219 ft²/T20.33 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. | 277 | 277 |
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. | 48 % | 48 % |
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. | 6.56 knots | 6.56 knots |
| Auxiliary engine | Longbow Sloop | Longbow Ketch |
Engine(s) | 1 inboard engine | 1 inboard engine |
Engine(s) power | 25 HP | 25 HP |
Fuel type | Diesel | Diesel |
| Accommodations and layout | Longbow Sloop | Longbow Ketch |
Cockpit | Closed aft cockpit | Closed aft cockpit |
Cabin(s) | 1 | 1 |
Berth(s) (min./max.) | 4 / 6 | 4 / 6 |
Head(s) | 1 | 1 |