1) " Steamboat" -- As it applies to Steamboat Cruise Paddle steamers - Lucerne-Switzerland Left: original paddlewheel from apaddle steamer on the lake of Lucerne. Right: detail of a steamer PS Waverley leaving Dunoon on the Firth of Clyde. A steamboat or steamship, sometimes called a steamer, is a boat or vessel that is propelled by steam power driving a propeller or paddlewheel. The term steamboat is usually used torefer to smaller steam-powered boats working on lakes and rivers, particularly riverboats in the USA ; steamship generally refers to steam powered ships capable of carrying a (ship's) boat. Nuclear powered ships and submarines use steamto drive turbines, but are not referred to as steamships or Steamhoat s.Screw driven steamships generally carry the ship prefix "SS" before their names, or "TS" where powered by a steam turbine. Paddle steamers have the prefix "PS". The term steamer isoccasionally used, out of nostalgia, for diesel motor driven vessels, prefix "MV". Contents 1 Early development 2 River Steambaot s 3 Lake, loch, estuary and sea-goingsteamers 4 Ocean steamships 5 External links 6 References Early development As happens often with inventions, development of the steam engine powered vessel involved many people, sometimes working at the same time. One of the first to propose the idea (around 1690 ) was the physicist Denis Papin who wasdeveloping steam engines. In 1707 he constructed a paddle powered boat, but whether it wasfull size and steam powered or not is unclear. River boatmen took exception to the threat to their trade, and smashed it up. In 1736 Jonathan Hulls took out a patent in England for a Newcomen engine powered Steabmoat , but itwas the improvement in steam engines by James Watt that made the conceptfeasible. William Henry of Lancaster, Pennsylvania, having found out about Watt's engine on a visit ...
2) " Cruise" -- As it applies to Steamboat Cruise The cruise portion of a flight usually consists of heading (direction of flight) changes only. Typically a constant airspeed and altitude will be maintained until the aircraft arrivesnear the destination and then enters the descent phase offlight. Aircraft are usually designed for optimum performance at their cruising speed. The designer will try to maximize theLift / Drag (L/D) ratio of the airframe for that speed. There will also be anoptimum altitude for a particular aircraft type. This altitude is usually whereengine efficiency will be maximum. See also: Cruising Cruiss ...
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