00:00A hull-type seaplane is a type of aircraft whose fuselage has characteristics resembling a hull.
00:04of a ship, allowing it to land on the water, maneuver on it, and take off from it.
00:08It is contrasted with the floatplane, whose fuselage remains out of the water.
00:12While a floatplane is often obtained by adapting floats to a land-based aircraft, a floatplane with
00:18The shell has a very different and specific design.
00:21Flying boats with hulls are generally much more massive.
00:23They are capable of handling much rougher seas, which often allows them to operate from ports
00:28maritime, whereas floatplanes are generally intended to operate in fresh water.
00:33Their design involves numerous compromises, having to reconcile aeronautical performance with specific requirements.
00:39Stability at sea, resistance to hydrodynamic stresses, etc.
00:43Most models are equipped, to prevent capsizing, with additional floats under the wings, possibly retractable.
00:50Most hull-type seaplanes also have landing gear, giving them a capacity
00:55amphibious.
00:56This is not the case, however, for the most massive models.
00:59Flying boats with hulls appeared very early in the history of aviation, with the first trials taking place
01:04even before the First World War.
01:06They played a very important role from the 1920s to the 1940s, mainly due to their scarcity.
01:12airfields at that time.
01:13In civil transport, they often surpassed the size and range of land-based aircraft of their time, and
01:19operate numerous regular long-haul routes.
01:22Their bases of operation are bodies of water relatively sheltered from weather hazards, such as lakes, bays, and
01:28estuaries, atolls, etc.
01:30In the military field, they are mainly used to spot and attack enemy convoys, to transport troops and...
01:36equipment, and to rescue the crews of ships and aircraft lost in combat.
01:40After World War II, flying boats with hulls fell abruptly into disuse.
01:44Most regular seaplane routes disappeared before 1950.
01:49This is partly explained by the construction of numerous airfields during the conflict, and by the massive availability of
01:55'Ground transport aircraft from American surplus.
01:58Regular seaplane routes are disappearing.
02:01The compromises involved in their design make them more expensive to operate than land-based aircraft of equivalent capacity.
02:07Their military roles are diminishing just as rapidly.
02:10Maritime patrol functions are taken over by land-based aircraft or aircraft operating from aircraft carriers, the
02:15The role of sea rescue, however, is passed on to helicopters.
02:18However, hull-type seaplanes retain some niche roles, which prevent them from disappearing completely.
02:24In particular, they are valuable in the role of water bombers, where they make use of their amphibious capability.
02:29to replenish their supplies by skimming the surface of the water.
02:31They are also entrusted with sea rescue missions and transport to isolated sites.
02:35Thank you for watching this video!
02:35Thank you for watching this video!
