A motorboat, speedboat or powerboat is a

boat A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats. Small boats are typically found on inl ...

that is exclusively powered by an

engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power gen ...

. Some motorboats are fitted with

inboard engine Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electri ...

s, others have an

outboard motor An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method ...

installed on the rear, containing the

internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combus ...

, the

gearbox Propulsion transmission is the mode of transmitting and controlling propulsion power of a machine. The term ''transmission'' properly refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive vehicles), differe ...

and the

propeller A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon ...

in one portable unit. An inboard-outboard contains a hybrid of an inboard and an outboard, where the internal combustion engine is installed inside the boat, and the gearbox and propeller are outside. There are two configurations of an inboard,

V-drive V-drive is a propulsion system for boats that consists of two drive shafts, a gearbox, and a propeller. In a "V-drive" boat, the engine is mounted in the rear of the boat and the front of the engine faces aft. Connected to the rear of the engine ...

and direct drive. A direct drive has the powerplant mounted near the middle of the boat with the propeller shaft straight out the back, where a V-drive has the powerplant mounted in the back of the boat facing backwards having the shaft go towards the front of the boat then making a ''V'' towards the rear. Lazzara 80 Sky Lounge enclosed bridge photo D Ramey Logan

Lazzara 80 Sky Lounge enclosed bridge photo D Ramey Logan

Overview

A motorboat has one or more engines that propel the vessel over the top of the water. Boat engines vary in shape, size, and type. Engines are installed either inboard or outboard. Inboard engines are part of the boat construction, while outboard engines are secured to the transom and hang off the back of the boat. Motorboat engines run on gasoline or diesel fuel. Engines come in various types. Engines vary in fuel types such as gasoline, diesel, gas turbine, rotary combustion or steam. Motorboats are commonly used for recreation, sport, or racing.

Boat racing Boat racing is a sport in which boats, or other types of watercraft, race on water. Boat racing powered by oars is recorded as having occurred in ancient Egypt, and it is likely that people have engaged in races involving boats and other wate ...

is a sport where drivers and engineers compete for fastest boat. The American Powerboat Association (APBA) splits the sport into categories. The categories include inboard, inboard endurance, professional outboard, stock outboard, unlimited outboard performance craft, drag, modified outboard, and offshore. Engines and hulls categorize racing. The two types of hull shape are runabout and hydroplane. Runabout is a v-shape and hydroplane is flat and stepped. The type of hull used depends on the type of water the boat is in and how the boat is being used. Hulls can be made of wood, fiberglass or metal but most hulls today are fiberglass. High performance speedboats can reach speeds of over 50 knots. Their high speed and performance can be attributed to their hull technology and powerful engine. With a more powerful and heavier engine, an appropriate hull shape is needed. High performance boats include yachts, HSIC (high speed interceptor craft) and racing powerboats. A V-type hull helps a boat cut through the water. A deep V-hull helps keep the boat's bow down at low speeds, improving visibility. V-hulls also improve a boat's speed and maneuvering capabilities. They stabilize a boat in rough conditions.

History

Invention

Stuttgart-cannstatt-daimler-boot-neckar-1886

Although the

screw propeller A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon ...

had been added to an engine (

steam engine A steam engine is a heat engine that performs mechanical work using steam as its working fluid. The steam engine uses the force produced by steam pressure to push a piston back and forth inside a cylinder. This pushing force can be trans ...

) as early as the 18th century in

Birmingham Birmingham ( ) is a city and metropolitan borough in the metropolitan county of West Midlands in England. It is the second-largest city in the United Kingdom with a population of 1.145 million in the city proper, 2.92 million in the West ...

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...

, by

James Watt James Watt (; 30 January 1736 (19 January 1736 OS) – 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1776, which was fun ...

, boats powered by a

petrol engine A petrol engine (gasoline engine in American English) is an internal combustion engine designed to run on petrol (gasoline). Petrol engines can often be adapted to also run on fuels such as liquefied petroleum gas and ethanol blends (such as ''E ...

only came about in the later part of the 19th century with the invention of the

. The earliest boat to be powered by a petrol engine was tested on the

Neckar The Neckar () is a river in Germany, mainly flowing through the southwestern state of Baden-Württemberg, with a short section through Hesse. The Neckar is a major right tributary of the Rhine. Rising in the Schwarzwald-Baar-Kreis near Schwenn ...

River by

Gottlieb Daimler Gottlieb Wilhelm Daimler (; 17 March 1834 – 6 March 1900) was a German engineer, industrial designer and industrialist born in Schorndorf (Kingdom of Württemberg, a federal state of the German Confederation), in what is now Germany. He was a ...

and

Wilhelm Maybach Wilhelm Maybach (; 9 February 1846 – 29 December 1929) was an early German engine designer and industrialist. During the 1890s he was hailed in France, then the world centre for car production, as the "King of Designers". From the late 19th ce ...

in 1886, when they tested their new "longcase clock" engine. It had been constructed in the former greenhouse (converted into a workshop) in Daimler's back yard. The first public display took place on the Waldsee in Cannstatt, today a suburb of

Stuttgart Stuttgart (; Swabian: ; ) is the capital and largest city of the German state of Baden-Württemberg. It is located on the Neckar river in a fertile valley known as the ''Stuttgarter Kessel'' (Stuttgart Cauldron) and lies an hour from the ...

, at the end of that year.Reuß, H.-J. ''Automobil und Motorschiff haben dieselben Wurzeln''. In: ''Hansa'', issue 2/2011, p. 20–21, Schiffahrts-Verlag Hansa, Hamburg 2011, The engine of this boat had a single

cylinder A cylinder (from ) has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an infin ...

of 1

horse power Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the ...

. Daimler's second launch in 1887 had a second cylinder positioned at an angle of 15 degrees to the first one, and was known as the "V-type". The first successful motor boat was designed by the

Priestman Brothers Priestman Brothers was an engineering company based in Kingston upon Hull, England that manufactured diggers, dredgers, cranes and other industrial machinery. In the later 1800s the company also produced the Priestman Oil Engine, an early desig ...

in Hull, England, under the direction of

William Dent Priestman William Dent Priestman (23 August 1847 7 September 1936), born near Kingston upon Hull was a Quaker and engineering pioneer, inventor of the Priestman Oil Engine, and co-founder with his brother Samuel of the Priestman Brothers engineering comp ...

. The company began trials of their first motorboat in 1888. The engine was powered with

kerosene Kerosene, paraffin, or lamp oil is a combustible hydrocarbon liquid which is derived from petroleum. It is widely used as a fuel in aviation as well as households. Its name derives from el, κηρός (''keros'') meaning "wax", and was regi ...

and used an innovative high-tension (high voltage) ignition system. The company was the first to begin large scale production of the motor boat, and by 1890, Priestman's boats were successfully being used for towing goods along canals. Another early pioneer was Mr. J. D. Roots, who in 1891 fitted a launch with an internal combustion engine and operated a

ferry A ferry is a ship, watercraft or amphibious vehicle used to carry passengers, and sometimes vehicles and cargo, across a body of water. A passenger ferry with many stops, such as in Venice, Italy, is sometimes called a water bus or water taxi ...

service between

Richmond Richmond most often refers to: * Richmond, Virginia, the capital of Virginia, United States * Richmond, London, a part of London * Richmond, North Yorkshire, a town in England * Richmond, British Columbia, a city in Canada * Richmond, California, ...

and

Wandsworth Wandsworth Town () is a district of south London, within the London Borough of Wandsworth southwest of Charing Cross. The area is identified in the London Plan The London Plan is the statutory spatial development strategy for the Gre ...

along the

River Thames The River Thames ( ), known alternatively in parts as the The Isis, River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the Longest rivers of the United Kingdom, se ...

during the seasons of 1891 and 1892. The eminent inventor

Frederick William Lanchester Frederick William Lanchester LLD, Hon FRAeS, FRS (23 October 1868 – 8 March 1946), was an English polymath and engineer who made important contributions to automotive engineering and to aerodynamics, and co-invented the topic of operation ...

recognized the potential of the motorboat and over the following 15 years, in collaboration with his brother

George George may refer to: People * George (given name) * George (surname) * George (singer), American-Canadian singer George Nozuka, known by the mononym George * George Washington, First President of the United States * George W. Bush, 43rd Presiden ...

, perfected the modern motorboat, or powerboat. Working in the garden of their home in

Olton Olton is an area/suburban village within the Metropolitan Borough of Solihull in the West Midlands, England. In the 13th century, the Lords of the Manor moved their seat and formed a new settlement, at the junction of two major roads. It was th ...

Warwickshire Warwickshire (; abbreviated Warks) is a county in the West Midlands region of England. The county town is Warwick, and the largest town is Nuneaton. The county is famous for being the birthplace of William Shakespeare at Stratford-upon-Avon an ...

, they designed and built a river flat-bottomed launch with an advanced high-revving engine that drove via a stern

paddle wheel A paddle wheel is a form of waterwheel or impeller in which a number of paddles are set around the periphery of the wheel. It has several uses, of which some are: * Very low-lift water pumping, such as flooding paddy fields at no more than about ...

in 1893. In 1897, he produced a second engine similar in design to his previous one but running on

benzene Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms, ...

at 800 r.p.m. The engine drove a reversible

. An important part of his new engine was the revolutionary

carburettor A carburetor (also spelled carburettor) is a device used by an internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the venturi tube in the main meterin ...

, for mixing the fuel and air correctly. His invention was known as a "wick carburetor", because fuel was drawn into a series of wicks, from where it was vaporized. He patented this invention in 1905. The

Daimler Company The Daimler Company Limited ( ), prior to 1910 The Daimler Motor Company Limited, was an independent British motor vehicle manufacturer founded in London by H. J. Lawson in 1896, which set up its manufacturing base in Coventry. The compan ...

began production of motor boats in 1897 from its manufacturing base in

Coventry Coventry ( or ) is a City status in the United Kingdom, city in the West Midlands (county), West Midlands, England. It is on the River Sherbourne. Coventry has been a large settlement for centuries, although it was not founded and given its ...

. The engines had two cylinders and the explosive charge of

petroleum Petroleum, also known as crude oil, or simply oil, is a naturally occurring yellowish-black liquid mixture of mainly hydrocarbons, and is found in geological formations. The name ''petroleum'' covers both naturally occurring unprocessed crud ...

and air was ignited by compression into a heated

platinum Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish , a diminutive of "silver". Platinu ...

tube. The engine gave about six horse-power. The petrol was fed by

air pressure Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The Standard atmosphere (unit), standard atmosphere (symbol: atm) is a unit of pressure defined as , which is equival ...

to a large surface carburettor and also an auxiliary tank which supplied the burners for heating the ignition tubes. Reversal of the propeller was effected by means of two bevel friction wheels which engaged with two larger bevel friction wheels, the intermediate shaft being temporarily disconnected for this purpose. It was not until 1901 that a safer apparatus for igniting the fuel with an electric spark was used in motor boats.

Expansion

Interest in fast motorboats grew rapidly in the early years of the 20th century. The Marine Motor Association was formed in 1903 as an offshoot of the

Royal Automobile Club The Royal Automobile Club is a British private social and athletic club. It has two clubhouses: one in London at 89 Pall Mall, and the other in the countryside at Woodcote Park, near Epsom in Surrey. Both provide accommodation and a range o ...

. ''

Motor Boat & Yachting ''Motor Boat & Yachting'' magazine is a monthly magazine about motorboats and yachting published by Time Inc. UK. The editor-in-chief An editor-in-chief (EIC), also known as lead editor or chief editor, is a publication's editorial leader who has ...

'' was the first magazine to address technical developments in the field and was brought out by Temple Press, London from 1904. Large manufacturing companies, including

Napier & Son D. Napier & Son Limited was a British engineering company best known for its luxury motor cars in the Edwardian era and for its aero engines throughout the early to mid-20th century. Napier was founded as a precision engineering company in ...

and

Thornycroft Thornycroft was an English vehicle manufacturer which built coaches, buses, and trucks from 1896 until 1977. History In 1896, naval engineer John Isaac Thornycroft formed the Thornycroft Steam Carriage and Van Company which built its firs ...

began producing motorboats. The first motorboating competition was established by Alfred Charles William Harmsworth in 1903. The

Harmsworth Cup The Harmsworth Cup, popularly known as the Harmsworth Trophy, is a historically important British international trophy for motorboats. History The Harmsworth was the first annual international award for motorboat racing. Officially, it is a cont ...

was envisioned as a contest between nations, rather than between boats or individuals. The boats were originally to be designed and built entirely by residents of the country represented, using materials and units built wholly within that country.1949 Harmsworth Trophy: Detroit River, Detroit MI, July 23-August 1, 1949
''www.lesliefield.com'', accessed 17 November 2019 The first competition, held in July 1903, at

Cork Harbour Cork Harbour () is a natural harbour and river estuary at the mouth of the River Lee in County Cork, Ireland. It is one of several which lay claim to the title of "second largest natural harbour in the world by navigational area" (after Port Ja ...

in Ireland, and officiated by the Automobile Club of Great Britain and Ireland and the

Royal Victoria Yacht Club The Royal Victoria Yacht Club is located along the shores of Cadboro Bay, British Columbia, Cadboro Bay in The Uplands, Greater Victoria, Uplands a neighborhood of Oak Bay, British Columbia, Oak Bay, adjacent to the city of Victoria, British Colu ...

, was a very primitive affair, with many boats failing even to start. The competition was won by

Dorothy Levitt Dorothy Elizabeth Levitt (born Elizabeth Levi; 5 January 1882 – 17 May 1922) was a British racing driver and journalist. She was the first British woman racing driver, holder of the world's first water speed record, the women's world lan ...

in a Napier launch designed to the specifications of

Selwyn Edge Selwyn Francis Edge (1868–1940) was a British businessman, racing driver, cyclist and record-breaker. He is principally associated with selling and racing De Dion-Bouton, Gladiator; Clemént-Panhard, Napier and AC cars. Personal life Edge ...

. This motorboat was the first proper motorboat designed for high speed. She set the world's first water speed record when she achieved in a steel-hulled, 75-horsepower Napier speedboat fitted with a three-blade propeller. As both the owner and entrant of the boat, "S. F. Edge" was engraved on the trophy as the winner. An article in the ''Cork Constitution'' on 13 July reported "A large number of spectators viewed the first mile from the promenade of the Yacht Club, and at Cork several thousand people collected at both sides of the river to see the finishes." Levitt was then commanded to the

Royal yacht A royal yacht is a ship used by a monarch or a royal family. If the monarch is an emperor the proper term is imperial yacht. Most of them are financed by the government of the country of which the monarch is head. The royal yacht is most often c ...

King Edward VII Edward VII (Albert Edward; 9 November 1841 – 6 May 1910) was King of the United Kingdom of Great Britain and Ireland and Emperor of India, from 22 January 1901 until his death in 1910. The second child and eldest son of Queen Victoria a ...

where he congratulated her on her pluck and skill, and they discussed the performance of the motorboat and its potential for British government despatch work.''

The Penny Illustrated Paper and Illustrated Times The ''Penny Illustrated Paper'' was a cheap ( 1d.) illustrated London weekly newspaper that ran from 1861 to 1913. Premises Illustrated weekly newspapers had been pioneered by the ''Illustrated London News'' (published from 1842, costing fivepe ...

'' (London, England),Saturday, November 17, 1906; pg. 309; Issue 2373. The Sensational Adventures of Miss Dorothy Levitt, - Champion Lady Motorist of the World. Available at British Library, British Newspapers

Search for Dorothy Levitt

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

won the race in 1904, and the boat ''Napier II'' set a new world water speed record for a mile at almost 30

knot A knot is an intentional complication in cordage which may be practical or decorative, or both. Practical knots are classified by function, including hitches, bends, loop knots, and splices: a ''hitch'' fastens a rope to another object; a ' ...

s (56 km/h), winning the race in 1905. The acknowledged genius of motor boat design in America was the naval architect John L. Hacker. His pioneering work, including the invention of the V-hull and the use of dedicated petrol engines revolutionized boat design from as early as 1908, when he founded the Hacker Boat Co. In 1911, Hacker designed the ''Kitty Hawk'', the first successful step hydroplane which exceeded the then-unthinkable speed of and was at that time the fastest boat in the world. The Harmsworth Cup was first won by Americans in 1907. The US and England traded it back and forth until 1920. From 1920 to 1933, Americans had an unbroken winning streak.

Gar Wood Garfield Arthur "Gar" Wood (December 4, 1880 – June 19, 1971) was an American inventor, entrepreneur, and championship motorboat builder and racer who held the world water speed record on several occasions. He was the first man to travel ...

won this race eight times as a driver and nine times as an owner between 1920 and 1933.

Hull type

The type of hull depends on the usage and type of water that the boat is being used in. Types of hulls include displacement hulls, vee-bottom hulls, modified vee-bottom hulls, deep-vee hulls and trim tabs for vee-bottom hulls. Hulls can be made of different materials. The three main materials are wood, reinforced fiberglass and metal. Wood hulls may be made of planks or plywood. Fiberglass hulls are reinforced with balsa wood. Metal hulls are either aluminum or steel. The hulls of recreational motorboats are distinguished between day cruiser,

bow rider A bow rider is a kind of runabout boat with an offset helm and extra forward seating. They are between 17' and 35', use stern drive or outboard engines, and hold between six and ten people. Its open bow area distinguishes it from a cuddy boa ...

, pilothouse and

cabin cruiser A cabin cruiser is a type of power boat that provides accommodation for its crew and passengers inside the structure of the craft. A cabin cruiser usually ranges in size from in length, with larger pleasure craft usually considered yachts. Many ...

. The upper construction of each has different features according to its specific use. They differ especially by size of cabin, dimension of half deck, helmsman armchair and crew seats position.

Racing

Powerboat racing engine categories for inboard and outboard engines range from 7.5 cu in to 60 cu in. Categories range from 44 cu in to 450 cu in for inboard only. The two types of motorboat races are speed races and predicted-log race. Speed races involve boats with powerful engines competing for quickest time and take place on freshwater bodies of water on a closed course. Races are marked by buoys. For unlimited hydroplanes the race distance ranges from 5 miles to 30 miles. Hydroplanes are drag raced. Predicted-log races involve slow cabin cruisers. Predicted-log races is a competition of planning and carrying out a sea voyage. The contestants evaluate different factors and variables that they will encounter along the way. The contestant with the least error at the end of the race is the winner. Also, speedboat tour is a common tourist attraction, especially in Dubai.

Military application

A fast craft is a vessel capable of speeds over 30 knots. HSICs (High Speed Interceptor Craft) however, trump fast craft with speeds of over 50 knots. HSICs are usually either custom or law enforcement craft. Law enforcement use these extremely fast boats to catch criminals such as smugglers or drug traffickers who use fast craft as well. The military have started to use HSICs to stop international threats such as pirates, militias, terrorists and weapons traffickers. Originally HSICs were not meant to carry large weapons. Now that the military is using them, they are being built with heavy machine guns. The boats have to be fitted with robust weight control and at the same time have heavy amour. HSICs must do without propellers to account for cavitation and vibrations. Instead HSICs use surface drivers or water jets.

Gallery

Hacker Runabout 2010.jpg, A 2010

Hacker-Craft Hacker-Craft is the name given to boats built by The Hacker Boat Co. It is an American company, founded in Detroit, Michigan in 1908 by John Ludwig Hacker (1877–1961, known as John L. Hacker or just "John L.") and is the oldest constructor o ...

triple cockpit runabout 22 ft Spencer Runabout.jpg, 2004, 22 ft Spencer runabout 1928 Chris Craft Cadet.jpg, 1928 Chris Craft Cadet 1929 Richardson Croisette.jpg, 1929 Richardson Croisette, 29 foot, Chrysler Ace engine Speed boat and water skiier.jpg, A motorboat pulling a waterskier

References

{{Authority control Nautical terminology Vehicles introduced in 1886