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Seller's Description

The Northstar 80/20 is a 40 Ketch designed by Sparkman and Stephens, built by Hughes Boatworks. The vessel features a comfortable center cockpit with two staterooms and two heads. A major refit was done in 2017 including a new Beta 50hp Engine plus several other upgrades within the last couple of years. We just finished up a great trip to the Bahamas and will be in Florida for a bit before heading back to Texas. The boat is sea kindly, safe, well equipped and ready to continue adventuring. Delivery might be possible.

Fresh Bottom Job and Cutlass bearing May 2021

Equipment: USCG Documented Vessel

70 Gallon internal diesel tank

2 Water bladders for a total of 95 gallons

15 Gallon holding tank

Mechanical

2017 Beta 50hp Diesel Engine and transmission with Balmar 120 amp Alternator 2021 New Alpha Marine 3000 Autopilot calibrated and tested by alpha technician 2017 New Shift and Throttle cable 2017 New Steering Cables 2017 New Shaft, Cutlass bearing, Seal and Prop

Electrical

2017 Full B&G package - 9 Plotter, 3G Radar, 3 Triton Displays 2017 Standard Horizen VHF with DSC 2017 Iridum Go with external antenna 2020 WeBoost Drive X with external antenna (Cell Booster) 2017 Vesper AIS Watchmate with external antenna 2018 Blue Seas AC / DC breaker panel 2018 Blue Seas ELCI breaker 2017 Galvanic Isolator 2018 1600 BTU Marine Air Conditioner 2017 Solar panels 2 @ 100Amp each and 1 @ 150Amp = 350Amp total 2017 Master volt 40 Amp Charger 2020 4 x 6 volt Trojan 125 batteries 2019 NAPA Heavy Duty Start Battery 2017 Balmar Max Charge MC 614 2017 Balmar Digital Duo Charge for Start Battery 2018 30 AMP shore power cord with 30 adapter

Plumbing

2107 Modular Watermaker 18-20 Gallons per hour new membrane 2021 2017 Raritan Electric flush Head 2017 Raritan Electrascan Type 1 MSD Electrode pack repaced 2020 2017 Lavac manual toilet 2018 Water pressure pump and accumulator tank

Sails & Rigging

2017 Doyle Headsail 2017 Doyle Stack packs 2017 Spectra Halyards 2017 New Running Rigging 2017 Dynema running back-stays with Lewmar aluminum blocks Full batten heavy main sail 2 Reefs Good condition inspected with some stitching reworked 2020 Mizzen also inspected in 2020 Standing Rigging inspected by rigger in 2020

Anchoring

2020 55LB Mantus Anchor with Swivel 2017 Vetus Windlass with Lewmar foot controls on deck 2020 200 foot of 10mm Din 766 Chain with 200 feet of Nylon Rode 2020 Anchor Bridle Fortress secondary anchor 15 foot of 3/8 chain and 200 feet of double braid

On Deck

2017 Balmar Deck Hatches (x3) 2017 Custom Dodger Bimini and hatch covers (new strataglass in 2020) 2017 Vetus Stainless Dorade vents (x3) 2017 Deck painted 2017 LED Spreader lights 2020 LED Cockpit lights Heavy Duty Custom Davits

Below Deck

2019 Memory foam mattress toppers All lighting LED Interior Red / White 2017 Hela Fans (x6) 2020 12V TV on Swivel mount with media controller Seth Thomas Ships Clock and Barometer

Galley

2017 Dometic refrigeration board and thermostat replaced 2019 3 Burner Stove and oven Completely overhauled with new valves and pilot lights 2017 Xintex S-2A Propane Control 2017 2 x Horizontal Propane Tanks with Dual Regulator Manual and pressurized freshwater at galley sink plus manual saltwater pump includes pots, pans, dishes and essential galley utensils

Safety

Revere Offshore Commander 4 person Liferaft in Valise kept in Deckbox on Aft deck Jack Lines Dynema Preventer lines 2017 ACR Epirb 2018 Auto Bilge pump 100 GPH 2020 Manual Whale bilge pump 2019 Fire extinguishers (x3) 2019 Flares

Dinghy

2012 AB 10 RIB with custom Sunbrella chaps 2012 Yamaha 15hp 2 Stroke outboard Custom Bench over 6 gallon fuel tank Upgraded oar locks Lowrance Elite 4 DSI fish finder NRS Wonder Pump Anchor

Other Stuff

2107 Honda 2000 Generator Spare engine filters, fluids, and belts Backup Autopilot head unit Diesel, Gas, and Water Jerry Cans Set of 4 Polyform fenders 2 Fishing Rod Holders Tons of other spares

Specs

Designers
?
Builders
?
Associations
?
# Built
?
Hull
Monohull
Keel
?
Rudder
?
Construction
?

Dimensions

Length Overall
39 11 / 12.2 m
Waterline Length
?
Beam
13 3 / 4.1 m
Draft
4 9 / 1.5 m
Displacement
?
Ballast
?

Rig and Sails

Type
?
Reported Sail Area
?
Total Sail Area
?
Mainsail
Sail Area
?
P
?
E
?
Air Draft
?
Foresail
Sail Area
?
I
?
J
?
Forestay Length
?

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
2

Calculations

Hull Speed
?

Hull Speed

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Formula

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL

?
Classic formula: ?
Sail Area/Displacement
?

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

Formula

SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
?
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
?

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Formula

Ballast / Displacement * 100

?
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
?

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
?
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
?

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
?
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
?

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
?
<2: better suited for ocean passages
>2: better suited for coastal cruising

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