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Quick Specs
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Model Year: 1984
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Make & Model: Beneteau First Class 10
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Class: Racer/Cruiser
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Length: 34.3ft (10m)
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Engine: Inboard Yanmar 2GM (14HP) Diesel
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Designer: Finot Jean-Marie ; Fauroux Jacques
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Name: Drop Beer
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Location: Redwood City Marina, CA
Detailed description
First Class 10 design – Fast and Safe
Whether you love offshore, beer-can racing, or fast cruising, the Beneteau First Class 10 has outstanding performance. Designed by Jean-Marie Finot and Jacques Fouroux and made to go fast she was a favorite of Fastnet racers in the late 80’s. With 34.33ft length and 9.67ft beam she displaces under 6900 pounds with a generous standard sail plan: 518 sqft upwind and a variety of spinnakers.
Despite her light displacement and powerful rig, the First Class 10 is very safe. Structurally strong, the underwater lines give her great stability and is easy on the helm. When a gust hits she just leans over more … and that’s fun, and it increases the waterline line length for increased maximum hull speed. Downwind she’s up on a plane before you know it.
Comfortable and Functional
The long lines of the First Class 10 offer plenty of space outside and a comfortable interior. The cockpit has 7ft long benches with easy backrests providing a generous amount of space for up to eight, and an open transom with wide swim platform makes it easy to walk into the boat from the dock or climb out of the water. When racing it’s easy to climb onto the wide side deck and steer from there with the tiller extension.
The electronics have all been updated with comprehensive wind/speed/depth sensors, dual i70 displays in the cockpit and a computer calculating true wind and able to display this on a local boat-WiFi network. The shore-WiFi connection allows continuous remote monitoring of critical information. The computer runs OpenCPN on a Raspberry Pi with many other functions, including automated data monitoring and triggering alarms as called for. A wireless Multi Function Display provides access to all electronic data and is fully programmable.
She has tiller steering and a robust Pelagic auto-pilot with a wireless remote control (the same one the single-handed Transpac sailors rely on).
Below-deck the nav station has a forward-facing chart table with chart stowage and reading lamp. To port, the galley has a sink and two-burner alcohol stove. Six can sleep on board as the accommodation includes one double birth forward, two singles in the saloon and another double in the aft cabin with a porthole opening into the cockpit.
Racing rig
She is in excellent condition with a full inventory of sails under 4 years old and rigged for both symmetrical spinnaker with a carbon pole and asymmetrical with a retractable Selden sprit. With practice she can be sailed to her NO CAL PHRF of 90. Rudder size was increased to accomodate local weather conditions, and The First Class 10 can maintain full sails even in a freshening breeze. The Keel-stepped mast is firmly controlled by running back-stays, check-stays and double spreaders. Deck equipment includes of two self-tailing Anderson headsail/main winches, two self-tailing runner winches, two halyard winches (all winches are two-speed). A central back-stay with 32:1 purchase makes it easy to bend the flexible mast for fine control of the mainsail shape. The outhaul is led to the cabin top for easy adjustment underway. A two-speed main-sheet and 4:1 traveler allow for precise adjustments and swift tacking. Forward, the crew may change jibs without losing a second thanks to the twin groove foil on the forestay.
More info
https://sites.google.com/view/drop-beer/home
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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