N500 Naviplane

The N500 arriving at Dover in 1980
Class overview
NameN.500 Naviplane
BuildersSEDAM/SNCF
OperatorsSeaspeed, Hoverspeed
Preceded byN.300 Naviplane
Built–1977
In service1977–1985
Completed2
Scrapped2
General characteristics
TypeHovercraft
Length50 m (160 ft)
Beam23 m (75 ft)
Height17 m (55 ft 9 in) hovering
Installed power5 x 2,535 kW (3,400 hp)
Propulsion5 × Avco-Lycoming TF-40 turboshaft
Capacity
  • 385 passengers
  • 45 cars
Crew15

The N500 Naviplane was a French hovercraft built by Société d'Etude et de Développement des Aéroglisseurs Marins (SEDAM) in Pauillac, Gironde for the cross English Channel route. Intended to have a large passenger and crew capacity, as prototypes they were for a short while the largest hovercraft. Only two were built. The first was destroyed by a fire before entering service, the second proved unreliable and was broken up in 1985 at the end of its service.