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OLSON 30 HULL#184 FOR SALE June 2023 Easy- to- sail ultralight performance sailboat with overnighting viability. Fresh- water sailed, last 8 years. Includes tandem- axle road trailer (8 pads) and 8hpTohatsu long- shaft outboard motor. Now located at Harrison Arkansas, USA; fully refurbished; new cushions. New paint throughout interior and exterior; includes new deck nonskid, and road trailer. Priced to sell at $17300 Details, are noted below:Rig: Double spreader black anodized aluminum mast, boom and spinnaker pole. Spinnaker pole is boom - mounted for fast launch and recovery. Standing Rigging Rod and Wire. Includes jock- strap and beam of destiny stabilizers and forestay foil lu7 spar. Running Rigging all halyards are Kevlar- cored. Most control lines are Dyneema ultra-low stretch line.Sails: Considerable wardrobe of Dacron and Kevlar/mylar sails.Mainsail, 5 foresails, 5 spinnakers of various weights. Allsails in fair to good condition.Sail Adjustment Mechanisms: Backstay 32:1 double ended cascade led forward to centralcockpit position. Mainsail outhaul internal 12:1 w/exit at mid- boom underside. Flattening reef and full reef lines led to forward end of boom. Vang 12:1 cascade. Cunningham 8: 1 cascade to swivel deck cleat. Mainsail Traveler Harken self- releasing car w / 3: 1 control lines. Spinnaker twing control lines and cleats. Double- ended mainsheet 3:1 and 5:1 purchase. Extended genoa tracks with Harken cars and 3:1 control system. Winches main, 4 two speed Harken, self- tailing; secondary 3 two speed (cabin top mounted). 2 winch handles; 2 winch handle pockets.Other Details: Rudder spade. Foil faired keel. Tiller wood laminated w/adjustable extension. New Bottom paint.
Equipment: Down Below: Varnished Brunzeel mahogany interior. Alcohol Stove (needs refurbishment) Sink Bowl Chart table Sleeping for four; new (2020) navy blue seat and focsle cushions Porta Potti. Manual bilge pump. Accessories: Anchor, chain and 100 ft rode Boat hook Bucket, scrub brush, deck brush; suction pad Mo
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.
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
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.
SA/D = SA ÷ (D ÷ 64)2/3
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.
Ballast / Displacement * 100
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.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
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.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
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.
CSV = Beam ÷ ³√(D / 64)
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