Editing Floatplane (section)

==Design==
Floatplanes have often been derived from land-based aircraft, with fixed floats mounted under the fuselage instead of an [[Landing gear|undercarriage]] (featuring wheels).
Floatplanes offer several advantages since the [[fuselage]] is not in contact with water, which simplifies production by not having to incorporate the compromises necessary for water tightness, general impact strength and the hydroplaning characteristics needed for the aircraft to leave the water. Attaching floats to a landplane also allows for much larger production volumes to pay for the development and production of the small number of aircraft operated from the water. Additionally, on all but the largest seaplanes, floatplane wings usually offer more clearance over obstacles, such as docks, reducing the difficulty in loading while on the water. A typical single engine flying boat is unable to bring the hull alongside a dock for loading while most floatplanes are able to do so.
[[File:UO-1 BB44 USS California.jpg|thumb|A [[Vought FU|Vought UO-1]] floatplane of the [[U.S. Navy]]]]
Floats inevitably impose extra [[drag (aerodynamics)|drag]] and weight, rendering floatplanes slower and less manoeuvrable during flight, with a slower rate of climb, than aircraft equipped with wheeled landing gear. Nevertheless, [[air race]]s devoted to floatplanes attracted much attention during the 1920s and 1930s, most notably in the form of the [[Schneider Trophy]], not least because water takeoffs permitted longer takeoff runs which allowed greater optimization for high speed compared to contemporary airfields.

There are two basic configurations for the floats on floatplanes: 
* "single float" designs, in which a single large float is mounted directly underneath the fuselage, with smaller stabilizing floats underneath the wingtips, on planes like the [[Nakajima A6M2-N]]
* "twin float" designs, with two main floats mounted side by side outboard of the fuselage. Some early twin float designs had additional wingtip stabilizing floats.

The main advantage of the single float design is its capability for [[landing]]s in rough water: a long central float is directly attached to the fuselage, this being the strongest part of the aircraft structure, while the smaller floats under the outer wings provide the aircraft with lateral stability. By comparison, dual floats restrict handling, often to [[wave]]s as little as one foot (0.3 metres) in height.<ref>[http://www.nasm.si.edu/research/aero/aircraft/aradoar.htm NASM research] {{webarchive|url=https://web.archive.org/web/20071124055039/http://www.nasm.si.edu/research/aero/aircraft/aradoar.htm |date=2007-11-24 }}</ref> However, twin float designs facilitate [[mooring (watercraft)|mooring]] and [[boarding (transport)|boarding]], and &ndash; in the case of [[torpedo bomber]]s &ndash; leave the belly free to carry a [[torpedo]].