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1971 Allied Luders

Listed
Expired
$26,000 USD

Seller's Description

Classic, solid boat from noted designer and quality builder. Marine engineer owned and upgraded. Sailed every year in and around Long Island and southern New England. She’s a good sea boat, comfortable offshore and in port. Very efficient to operate and easy to maintain. See Practical Sailor article and Luders Association online, also : Good Old Boat “Allied Yacht Company”

Desirable dinette layout with v-berth forward; next aft is the enclosed head with hanging locker opposite. Dinette to port sleeps 2 with table down. Starboard settee pulls out, pilot berth above and outboard. Galley next aft to port with toploading fridge opposite to starbord. Centerline sink with updated faucet 2017. Interior is Herreshoff Style white painted bulkheads with varnished teak trim. She could use a deck paint job, cosmetically a bit challenged, but decks are solid and sound. Hull painted white Imron in 1999. Recored cockpit seats 2016. Teak cleaned and treated with Semco annually Sloop rigged with roller furling headsail, and extensive sail inventory. Working jib, 120 and 140 Genoas and a 170 mylar genoa for those really light air days. Spinnaker and whisker pole never used by us. Fully battened Main has 2 reef points and traditional jiffy/slab reefing Sails have been professionally washed, inspected and maintained New Genoa sheets 2017 Barient 2Spd S/T prim winches, mast mounted jib winch and S/T main halyard winches 1999 Yanmar 3GM30F with about 1200 hrs. New Injectors 2017 (old injectors rebuilt and carried as spares), new fresh water pump 2017. Oil changed annually, oil and fuel filters changed annually. Boat has upgraded electrical system w/ 100A alternator, 2x6V GC batteries 220 AH (new 2018), starting battery new 2019, 12V refrigeration, solar panel and MPPT controller. Shore power panel with battery charger. LED anchor light, LED cabin lights Weems & Plath Clock and barometer on port cabin bulkhead

Equipment: New sailcover and dodger 2021 New head 2022 Raymarine chartplotter at helm Raymarine EVO Autopilot Good ground tackle and bow roller Traditional oil lamp starboard Electric bilge pump (2016) and manual bilge pump (Operated from cockpit) Edson wheel steeering, pedestal mounted Raymarine A-series plotter and 3000 series wheelpilot. Upgraded shift and fuel controls to Edson pedestal mount in 2017 Bow roller with 35 lb. Delta primary W/C manual head flushes with fresh water from sink drain (clever and clean) and holding tank with y-valve and macerator. Head rebuilt and macerator pump new 2018 3-burner propane stove and oven. We run off of 1 lb cans (no propane system) Hot (3 gall tank off engine) and cold pressure water in galley and head. Chainplates removed and replaced with new oversized silicon bronze (the real deal) plates in 2017. Chainplate knees and bulkheads inspected and reglassed with epoxy. Chainplates are now easily inspected; chainplate covers replaced with new 316l and rebedded with butyl tape. All metal work waterjetted and accurate. First rate job. Cabin side windows replaced with cast acrylic 2017. Original frames powdercoated when removed, all screw holes retapped and bolts replaced with new. Rebedded with butyl tape. Cockpit cushions new 2009, cabin cushions new 2007.

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Specs

Designer
Alfred E. Luders
Builder
Allied Boat Company Inc.
Association
Luders 33 Owners
# Built
107
Hull
Monohull
Keel
Long
Rudder
?
Construction
FG

Dimensions

Length Overall
33 0 / 10.1 m
Waterline Length
24 0 / 7.3 m
Beam
10 0 / 3.1 m
Draft
4 11 / 1.5 m
Displacement
12,800 lb / 5,806 kg
Ballast
4,500 lb / 2,041 kg (Lead)

Rig and Sails

Type
Sloop
Reported Sail Area
524′² / 48.7 m²
Total Sail Area
525′² / 48.7 m²
Mainsail
Sail Area
264′² / 24.6 m²
P
34 9 / 10.6 m
E
15 2 / 4.6 m
Air Draft
?
Foresail
Sail Area
260′² / 24.2 m²
I
39 11 / 12.2 m
J
12 11 / 4 m
Forestay Length
42 0 / 12.8 m

Auxilary Power

Make
Palmer
Model
M-60
HP
?
Fuel Type
Gas
Fuel Capacity
30 gal / 114 l
Engine Hours
?

Accomodations

Water Capacity
45 gal / 170 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
6.2 kn
Classic: 6.57 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

6.22 knots
Classic formula: 6.57 knots
Sail Area/Displacement
15.3
<16: under powered

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.
15.32
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
35.2
<40: less stiff, less powerful

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

35.15
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
412.6
>350: ultraheavy

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
412.55
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
34.2
30-40: moderate bluewater cruising 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
34.21
<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
1.7
<2.0: better suited for ocean passages

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
1.71
<2: better suited for ocean passages
>2: better suited for coastal cruising

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