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A flatboat (or broadhorn) was a rectangular flat-bottomed boat with [1] square ends used to transport freight and passengers on inland waterways in the United States. The flatboat could be any size, but essentially it was a large, sturdy tub with a hull .
However some flats boats designs, sometimes called skiffs are truly a flat-bottomed boat design. [ 4 ] The deadrise (which, simplified, is a measure of the angle of bottom in v-hull boats) of most flats boats is generally a small angle because larger deadrise often requires more water displacement which increase the boat's draft and is not ...
A flat-bottomed boat is a boat with a shallow draft, two-chined hull, which allows it to be used in shallow bodies of water, such as rivers, because it is less likely to ground. The flat hull also makes the boat more stable in calm water, which is good for hunters and anglers .
The bottom is flat in a river junk with no keel (similar to a sampan), so that the boat relies on a daggerboard, [16] leeboard or very large rudder to prevent the boat from slipping sideways in the water. [17] The internal bulkheads are characteristic of junks, providing interior compartments and strengthening the ship.
The multi-chine hull approximates a curved hull form. It has less drag than a flat-bottom boat. Multi chines are more complex to build but produce a more seaworthy hull form. They are usually displacement hulls. V or arc-bottom chine boats have a V shape between 6° and 23°. This is called the deadrise angle. The flatter shape of a 6-degree ...
These boats tend to be less heavily crewed in relation to their length than the traditional Australian Skiff Classes. The term is even used for some single-handed boats like the Musto Skiff which are far removed from the heavily crewed original boats. The SKUD 18 is a two-person keelboat which claims strong influence from skiff development. [15]
The twin unstayed masts makes rigging very easy and saves on cost. The unstayed flexible masts also allow wind to be spilled from the sails which helps with stability. The flat bottom, narrow water line and ample working sail means the boat is fast down wind where the flat bottom helps promote surfing or planing in stronger winds.
The water caterpillar boat propulsion system (Popular Science Monthly, December 1918) 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 ]