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- Sailboat Guide
San Juan 34
San Juan 34 is a 33 ′ 9 ″ / 10.3 m monohull sailboat designed by Hein Driehuyzen and built by Clark Boat Company between 1980 and 1986.
Rig and Sails
Auxilary power, accomodations, calculations.
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
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL
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.
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.
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.
Ballast / Displacement * 100
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.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
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.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )
- D: Displacement of the boat in pounds
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
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.
CSV = Beam ÷ ³√(D / 64)
Before the molds were sold to Clark Boat Co, this was the CROWN 34, built by Calgan Marine (CAN).
Shoal draft version: Draft: 5.25’/1.6m Disp.: 12500 lbs./5670 kgs. Ballast: 5300 lbs./2404 kgs. Tall Rig: I): 46.50’ / 14.17m J: 14.66’ / 4.47m P: 39.50’ / 12.04m E: 11.00’ / 3.35m SA(Fore.): 340.85 ft2 / 31.66 m2 SA(Main): 217.25 ft2 / 20.18 m2 Sail Area (100% fore+main triangles): 558.10 ft2 / 51.85 m2
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COMMENTS
The C-Lark is an American sailboat, that was designed by Don Clark and first built in 1964.
Overview. Founded by Bob Clark and located in Kent, Washington, near Seattle. The first boat built under the name Clark Boat Company was a Lightning, which was one of the first fiberglass Lightnings on the market.
Clark Boat Company. Founded by Bob Clark and located in Kent, Washington, near Seattle. The first boat built under the name Clark Boat Company was a Lightning, which was one of the first fiberglass Lightnings on the market.
Designed to determine if a boat has blue water capability. The CSF compares beam with displacement since excess beam contributes to capsize and heavy displacement reduces capsize vulnerability. The boat is better suited for ocean passages (vs coastal cruising) if the result of the calculation is 2.0 or less.
C-Lark is a 14′ 0″ / 4.3 m monohull sailboat designed by Don Clark and built by Douglass & McLeod and Clark Boat Company between 1964 and 1979.
A trio of factors combined to put the right people at the right place and time to create the Clark Boat Company and the San Juan line of boats. In the late 1960’s, in Kent, Washington, near Seattle, Bob and Coral Clark had been building small one design racing dinghies, including Thistles and Lightnings.
Clark Boat Co Thistle. This may be the boat that you have always wanted, but couldn't find one that you could afford. Well you may have just found it. Comes with a custom trailer, 2 complete sets of sails, one from North and one from Sobstad.
The Clark Boat Company was an American boat builder based in Kent, Washington. The company specialized in the design and manufacture of fiberglass sailboats. The company was founded by Bob Clark in 1960 and continued in business until 1984.
San Juan 34 is a 33′ 9″ / 10.3 m monohull sailboat designed by Hein Driehuyzen and built by Clark Boat Company between 1980 and 1986.
Clark brothers San Juan 28 sailboat. Length: 28' Beam: 10' Draft: 4.5'. Year: 1978. Type: racer/cruiser. Hull: fiberglass monohull.