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Royal Navy World War II motor torpedo boat planing at speed on calm water showing its hard chine hull - note how most of the forepart of the boat is out of the water. At rest, a vessel's weight is borne entirely by the buoyant force. Every hull acts as a displacement hull at low speeds: the buoyant force is mainly responsible for supporting the ...
Since the forces on the sail are resisted by forces in the water (for a boat) or on the traveled surface (for an ice boat or land sailing craft), their corresponding forces can also be decomposed from total aerodynamic force into driving force (F R) and lateral force (F LAT). Driving force overcomes resistance to forward motion.
The boat has a draft of 3.37 ft (1.03 m) with the standard keel. [1] [3] The boat is normally fitted with a small 4 to 6 hp (3 to 4 kW) outboard motor mounted in a stern well, for docking and maneuvering. [1] [3] The design has sleeping accommodation for either two or four people, depending on version.
1. A position half way along the length of a ship or boat. [14] 2. A position half way between the port and starboard sides of a ship or boat, as in "helm amidships", when the rudder is in line with the keel. [14] ammunition ship A naval auxiliary ship specifically configured to carry ammunition, usually for combatant ships and aircraft.
The Vietnamese/Asian version of the coracle is made of interwoven bamboo and made water proof by using resin and coconut oil. [5] Oval in shape and very similar to half a walnut shell, the coracle has a keel -less flat bottom to evenly spread the load across the structure and to reduce the required depth of water; often to only a few inches.
2. (more precisely, as used in inland waters) to propel a boat with oars, where each rower uses just one oar. On inland waters, one person using two oars, one on each side of the boat, is termed sculling [35]: 135 rowlock 1. The cutout in the washstrake of a boat into which an oar is placed, so providing a fulcrum when the oar is in use. [47]
One of the points of sail is "Head to Wind." A boat turns through this point on each tack. It is the point at which the boat is neither on port tack or starboard tack and is headed directly into the wind. However, a boat cannot sail directly into the wind, thus if it comes head to the wind it loses steerage and is said to be "in irons."
The boat is shunted from beam reach to beam reach to change direction, with the wind over the side, a low-force procedure. The bottom corner of the crab claw sail is moved to the other end, which becomes the bow as the boat sets off back the way it came. The mast usually hinges, adjusting the rake or angle of the mast.