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“Rampage” is a fun and fast racer/cruiser with many upgrades. She can be raced around the buoys or used for a weekend cruise. She has an efficient deck layout and a roomy self-bailing cockpit and when its time to turn out the lights she sleeps six: V-berth (2); port and starboard lower (2), starboard upper (1); large berth behind the navigation station (1). Morning coffee can be made using the galley’s Origo 3000, two burner alcohol stove. There is a sink w/pressurize water tap, and icebox for food and drink. The roomy cabin has six feet of headroom with handholds on port and starboard for the weather turns nasty. U.S.C.G Documented vessel.
Equipment: 2021 New Trogear carbon fiber sprit Spinlock tiller extension handle w/swivel 2018 B&G Triton 2 on a NMEA 2000 backbone 2018 Masthead 608 B&G NMEA 2000 wind transducer 2018 Airmar DST800 transducer depth, speed, water temp 2020 B&G ZG100 GPS Antenna New Dyneema lifelines
Racing Sails 2021 Evolution .75 ounce Nylite Asymmetrical Spinnaker .75 ounce Symmetrical Spinnaker 2018 Lightly used Elliot Pattison dacron100% Blade 2017 Elliot Pattison Kevlar 150% Genoa 2017 Elliot Pattison Kevlar mainsail; one set of reef points
Cruising Sails Dacron mailsail, one set of reef points Schurr Sails Yankee 150% Kevlar genoa
Sail Controls Lazy jacks for solo sailing Harken headstay foil Aluminum spinnaker pole Blocks, blocks and more blocks, for vang, Cunningham, backstay Barient #26 two-speed non-self tailing winches Lewmar #43 self tailing winches Lewmar #40 self tailing winches cabin top
Engine Repowered w/2002 Yanmar 2GM20 2 blade folding prop House and start batteries w/selector switch
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)
Shorter rig.
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