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1985 Point Jude 15

Listed
$2,795 USD

Seller's Description

Go to Sailing Texas classifieds for current sailboats for sale Point Jude 15, 1985 sailboat for sale This Starwing-built Point Jude comes with Tanbark Sails (excellent shape), three mahogany Locker Covers, Bilge Pump, Motor Mount, Anchor with rode and throw Cushion. Centerboard and rudder are in good shape. Maryland Title in hand. The 1985 Karavan Trailer has updated 4.80X12 Tires with a spare, Bearing Buddies, a Tongue Jack, and Winch on a stand. Maryland Title in hand. This Point Jude daysailer, was designed in 1946 by Edson Schock, with over 1,200 boats were built. Clearly, this boat was intended with stability, safety and comfort in mind. Dinghy racing was not on the designer’s mind. The 525 lbs hull should keep the 136 sq.ft. sailplan well behaved and stable. The chined hull will make for relatively flat and dry sailing. Buyer’s Choice: White or Tanbark sails - all very good condition.

Stats: LOA 15’8” Beam 5’11” Draft 8” board up, 3’4” board down Sail area 136 sf (main 100 sf, jib 36 sf) – traditional tanbark color preferred Displacement 525 lbs. Mast height 23’7” 25 cubic feet of lockable storage mahogany kickup rudder, traditional laminate tiller kickup weighted centerboard teak splash rail around cockpit teak rub rail teak laminate hatch covers (two fore, one aft) removable motor mount Up to 3hp motors Location: Essex, MD

SOLD

Specs

Designer
Edson I. Schock
Builder
Holby Marine
Associations
?
# Built
1200
Hull
Monohull Dinghy
Keel
Centerboard
Rudder
?
Construction
Wood/FG

Dimensions

Length Overall
15′ 9″ / 4.8 m
Waterline Length
14′ 4″ / 4.4 m
Beam
5′ 10″ / 1.8 m
Draft
0′ 7″ / 0.2 m — 3′ 3″ / 1 m
Displacement
520 lb / 238 kg
Ballast
?

Rig and Sails

Type
Sloop
Reported Sail Area
136′² / 12.6 m²
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
?

Calculations

Hull Speed
8.0 kn
Classic: 5.07 kn

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

8.02 knots
Classic formula: 5.07 knots
Sail Area/Displacement
33.4
>20: high performance

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.
33.44
<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
79.5
<100: Ultralight

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
79.48
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
5.1
<20: lightweight racing boat

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
5.12
<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
2.9
>2.0: better suited for coastal cruising

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
2.93
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

First displayed in Edson Schock’s “How to Build Small Boats”.
Point Jude 15 Class Assn.
401-789-0424
c/o South County Marine
20 Fairgrounds Rd. #8
West Kingston, RI 02892

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