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Hylas 70 (Deep draft)

Main featuresHylas 70 Deep draft
Model
Hylas 70
Version
Deep draft
Hull type
Monohull
Category
Offshore cruising sailboat
Sailboat builder
Hylas Yachts
Sailboat designer
Country
Taiwan
Construction
Carbon fiber reinforced epoxy:
- Hull: Single skin carbon fiber vinylester with Kevlar reinforcements
- Deck: Sandwich balsa carbon fiber vinylester
First built hull
2007
Last built hull
Still in production
Award(s)
  • 2008: Cruising World - Boat of the Year: Full-Size Cruiser
    Appendages
    Keel : L-shaped keel (with bulb)
    Helm
    Twin helm wheels
    Rudder
    Single semi-spade rudder
    Unsinkable
    No
    Trailerable
    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
     
    Main dimensionsHylas 70 Deep draft
    Overall length
    68’ 11”21.01 m
    Hull length
    68’ 11”21.01 m
    Waterline length
    61’ 7”18.77 m
    Beam (width)
    18’5.49 m
    Draft
    9’ 6”2.9 m
    Light displacement (MLC)
    75178 lb34100 kg
    Ballast weight
    29321 lb13300 kg
     
    Rig and sailsHylas 70 Deep draft
    Upwind sail area
    2422 ft²225 m²
    Rigging type
    Sloop Marconi masthead
    Mast configuration
    Deck stepped mast
    Rotating spars
    No
    Number of levels of spreaders
    3
    Spreaders angle
    0 °
    Spars construction
    Aluminum spars
    Standing rigging
    Single-strand (ROD) discontinuous
     
    PerformancesHylas 70 Deep 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.
    230 ft²/T21.4 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.
    146
    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.
    39 %
    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.
    10.52 knots
     
    Auxiliary engineHylas 70 Deep draft
    Engine(s)
    1 inboard engine
    Engine(s) power
    260 HP
    Fuel type
    Diesel
    Fuel tank capacity
    700.1 gal2650 liters
     
    Accommodations and layoutHylas 70 Deep draft
    Cockpit
    Center cockpit
    Cabin(s)
    4
    Berth(s) (min./max.)
    8 / 10
    Head(s)
    4
    Freshwater tank capacity
    400.2 gal1515 liters
    Holding tank capacity
    66 gal250 liters
    Boiler capacity
    19.8 gal75 liters
     
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