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MAGLEV- HYTRAIN MAGLEV-HYTRAIN ( HYbrid TRAIN) is a proposed high speed transportation system for both passengers and freight. It represents an ecological and economical solution for a future very high speed train (650 km/h). The train moves in levitation on rails made of permanent magnets (A) and it is guided by compressed air cushions (C) as shown in the following sketch.Permanent magnets (D) are also mounted on small "wings" running the length of the train. Compared to the electromagnetic rails used in current designs, the use of "passive" rails constitutes a very important advantage in terms of costs. With the geometry shown, the instability forces, (always present in a system of permanent magnets), are horizontals and of low intensity: to counter them we use compressed air cushions (C). With a constant flow air supply, the variation of the horizontal stabilising forces is greater than the variation of the magnetic instability forces, which makes the system in stable equilibrium. A third rail (F) in the central part has different functions: it acts as a counterpart to the plates applied to the train to make the compressed air cushions, it is the guide element of the train and has the function of supporting Al plates which constitute the passive part of linear induction motors (H). It is also used to create mechanical emergency brakes. Using modern technologies, such as permanent magnets which produce a very high magnetic field, thus developing sufficient forces to levitate the train, compressed air cushions, new generation rechargeable batteries, solar panels which provide all the energy needed to run several trains per day and linear induction motors (H), a new design of very high speed transport system has been designed, economical, ecological and environmentally friendly, which could be competitive with highly polluting continental flights. To prevent the dangerous effects caused by unfavorable atmospheric conditions, such as cross winds, rain and snow, the train travels on a viaduct covered, at the top, with a half-tube of transparent material. In this way we also solve the problem of the strong destabilising pressure variations at the entrance of the tunnels which are evident in current high speed trains. This innovation also prevents dangerous deformation of the rails of current trains, due to high temperatures in summer: maintenance is thus reduced to a minimum and can be carried out by specialized robots. Due to the expected very high speed (650 km/h), the train can easily overcome hilly terrain, thus avoiding the cost and time of building many tunnels. It goes without saying that MAGLEV-HYTRAIN, mainly because of its characteristics of comfort and for the possibility of obtaining a very important acceleration and deceleration, can also be used with advantage at a reduced speed (150-200km/h), for short routes. Used to build metro lines, we would have the advantage of a transport system without noise and vibrations. In this case, the viaduct will be replaced by a simple reinforced concrete platform and the necessary electrical energy can be supplied by conventional current lines.