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1981 Tartan T-33 LOA 338, Beam 10.96, Weight 10,000, ballast 4,400 lbs. Scheel keel, 4.46 deep Bridge clearance 51.5, Fractional rig. 531 sq. ft. sail PHRF rated 174 Capacities: 62 & 30 gal tanks water., Fuel 26 gal. diesel, Holding 14-19 gal. New rudder 2014. Misc: Port nav. station, fold down table Pedestal steering. 32 ss. wheel All standing rigging lighting grounded. Ports: 8, new gaskets installed 2011, 2 deck hatches rebedded and gasketed 2020 Steel cradle, Batteries: 2021, 2017, battery charger new in 2015 Stored Inside during winter, Winter frame and cover, 120v receptacles inside cabin, V berth has convenience shelves, (2) brass dorads on deck. Sails: 140% jib, used 10 times, 2019, dacron Mainsail, new in 2015, used about 50 times. 1 reef. Dacron A-symmetrical light air, like new, Storm sail, new, never used, Old main, good condition. All lines led aft.
Equipment: Accommodations: New foam and seat cover in 2011, stored in basement over winters, New wall fabric in 2015, Cabin lights and fans, New dodger 2011, with extension and side curtains to main sheet 2012, Fold down table in cabin. Galley: gimbled pressure alcohol stove and/or microwave gimbled, Plenty of storage. Refrigerator/freezer works off 12V. (Adler Barbour) Head: marine toilet Jabsco, (2011) with holding tank tested 2014, Pressure water, pump replaced 2015, Basin w/shower head and shower curtain track. Powertrain: Universal 5424 3 cylinder 24 hp water cooled engine. Cooling system closed, cooled by heat exchanged. Rebuilt 2011. New water pump 2019, Hurth transmission, 2:1 gear ratio, 2 blade fixed prop. Checked and balance, shaft straight to within .015, Cutlass bearing replaced and in good order. Electronics: VHF: Icom IC-M302 Autohelm Raymarine ST6002 Depth Sounder Autohelm Compass: Richie Wind: Autohelm. Radar, Funuro. Safety equipment: PFDs, Throwable, fire extinguishers, Visual distress signals, Sound device, navigation light, plaques, manual bilge pump, electric bilge pump. Boat hook, anchor, chain with rode. Bottom paint, ablative, 2021. Standing rigging: Aluminum mast with one set of spreaders. Keel mounted. Shrouds are 1 X 19, SS. Aluminum boom, jib pole. Running rigging: Winches are Lewmar 2 speed. (2) deck mounted sail tracks, Schaeffer main sheet traveler, Harken roller furling, Garhauer camcleats, new in 2011.
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)
Deep keel: 6.25’
Sheel keel was standard.
Earlier boats have a shorter fore-triangle with the following dimensions:
I: 36.50’ J: 12.5’ P: 41.75’ E: 14.50’.
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