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The pivoting design allows the outboard motor to be swiveled by the operator in almost all directions: Sideways for direction, up and down to change the thrust line according to speed or bow lift, elevate completely out of water for easy starting, placing the drive shaft and the propeller forward along the side of the boat for reverse, or put ...
A pump-jet works by having an intake (usually at the bottom of the hull) that allows water to pass underneath the vessel into the engines. Water enters the pump through this inlet. The pump can be of a centrifugal design for high speeds, or an axial flow pump for low to medium speeds. The water pressure inside the inlet is increased by the pump ...
Flats boats are often small easily trailerable boats although some may reach up to 23 ft in length [6] or more. They are typically equipped with outboard motors and offer a relatively shallow draft compared to other boats of the same length, to allow for passage over sandbars, oyster beds or other submerged objects or underwater features with less risk of damaging the hull or engine.
An early uncommon means of boat propulsion was the water caterpillar. This moved a series of paddles on chains along the bottom of the boat to propel it over the water and preceded the development of tracked vehicles. [34] The first water caterpillar was developed by Joseph-Philibert Desblanc in 1782 and propelled by a steam engine. In the ...
The nearly flat hull of a johnboat tends to ride over the waves rather than cut through them as a V-hull might; this shallow draft – only a few inches [2] – enables the johnboat to operate in very shallow water, [3] but limits its use to calm waters. Johnboats typically have a transom onto which an outboard motor can be mounted. They are ...
Advantages of the sterndrive system versus inboards include simpler engineering for boatbuilders, eliminating the need for them to design propshaft and rudder systems; ease of trailering and shallow water maneuvering (with the drive trimmed up); also, a significant space savings with the engine mounted all the way aft, freeing up the boat's ...
The main product line is outboard motors. It also produces the MerCruiser line of sterndrives and inboard engines, as well as a lineup of electric outboard motors. Utilizing modular and portable 48V lithium-ion batteries and transverse flux motor technology, these yield high torque with optimum efficiency.
Their popularity in the United States was due primarily to the fact that the walking beam engine was well suited for the shallow-draft boats that operated in America's shallow coastal and inland waterways. [17] Walking beam engines remained popular with American shipping lines and excursion operations right into the early 20th century.
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