A car having: a frame; four wheels, which are mounted on the frame in a rotary manner; a body, which covers the frame; at least one compressed air tank; and at least one gas pusher, which is connected to the compressed air tank, is integral to the frame and has a plurality of nozzles, which face outwards, can be activated in order to generate respective air jets, are arranged parallel to and beside one another, have the same orientation and are sized so as to generate different pneumatic thrusts given the same pressure of the compressed air flowing in; a pressure sensor, which determines a pressure inside the compressed air tank; and a control unit, which activates the plurality of nozzles in a coordinated manner so as to generate, as a whole, a desired pneumatic thrust based on the pressure inside the compressed air tank.

A car having: a frame; four wheels, which are mounted on the frame in a rotary manner; a body, which covers the frame; at least one compressed air tank; and at least one gas pusher, which is connected to the compressed air tank, is integral to the frame and has a plurality of nozzles, which face outwards, can be activated in order to generate respective air jets, are arranged parallel to and beside one another, have the same orientation and are sized so as to generate different pneumatic thrusts given the same pressure of the compressed air flowing in; a pressure sensor, which determines a pressure inside the compressed air tank; and a control unit, which activates the plurality of nozzles in a coordinated manner so as to generate, as a whole, a desired pneumatic thrust based on the pressure inside the compressed air tank.

A braking device comprising a body mounted for rotation about a first axis; means for rotating the body about the first axis; comprises a second axis, a third axis and a fourth axis, the braking device being configured as to enable the body to further rotate about the second axis and the third axis, the first axis being oriented with respect to the second axis at an alpha angle () which is greater than 0 degrees, the second axis being oriented with respect to the fourth axis at a beta angle () which is greater than 0 degrees and less than 90 degrees, the third axis being the precession axis about which the precession of the body occurs as a result of rotating the body about the first axis and applying torque to the body about the second axis.

A car having: a frame; four wheels, which are mounted on the frame in a rotary manner; a body, which covers the frame; at least one compressed air tank; and at least one gas pusher, which is connected to the compressed air tank, is integral to the frame and has a plurality of nozzles, which face outwards, can be activated in order to generate respective air jets, are arranged parallel to and beside one another, have the same orientation and are sized so as to generate different pneumatic thrusts given the same pressure of the compressed air flowing in; a pressure sensor, which determines a pressure inside the compressed air tank; and a control unit, which activates the plurality of nozzles in a coordinated manner so as to generate, as a whole, a desired pneumatic thrust based on the pressure inside the compressed air tank.

A railroad powered energy cogeneration system and method comprising a plurality of air compressor hoses, a plurality of manifold pipelines, at least one manifold pipeline check valve, a pneumatic air filter, a pneumatic motor-generator set, and a pressure control valve, wherein the plurality of manifold pipelines is configured to connect each of the plurality of air compressor hoses attached to an inner side of each of the rails of an existing railroad system. The plurality of air compressor hoses produces compressed air when a train traverses over them. The at least one manifold pipeline check valve is configured to assure unidirectional air flow through the plurality of manifold pipelines. The pneumatic motor-generator set converts compressed air into electricity and the remaining compressed air is stored in the storage vault and/or other storage means described.

An electric machine comprising a rotor, a stator, and a fluid-based brake arrangement for said rotor, said fluid-based brake arrangement having a fluid circuit for transporting a brake fluid, said fluid circuit comprising a fluid channel arrangement having at least one radial fluid channel segment extending radially through a part of said rotor so as to allow for directing brake fluid from an inner radial rotor side to an outer radial rotor side, whereby, during rotation of said rotor about an axial centre axis, acceleration of brake fluid in said at least one radial fluid channel segment causes a reaction force exerting a braking torque on the rotor.

An electric machine comprising a rotor, a stator, and a fluid-based brake arrangement for said rotor, said fluid-based brake arrangement having a fluid circuit for transporting a brake fluid, said fluid circuit comprising a fluid channel arrangement having at least one radial fluid channel segment extending radially through a part of said rotor so as to allow for directing brake fluid from an inner radial rotor side to an outer radial rotor side, whereby, during rotation of said rotor about an axial centre axis, acceleration of brake fluid in said at least one radial fluid channel segment causes a reaction force exerting a braking torque on the rotor.

A reverse thrust braking system includes an inlet having propeller fan blades that accelerate air coming into the system. A plurality of chambers receive the air accelerated through the inlet by the propeller fan blades. An exit point receives air from at least one of the plurality of chambers and exhausts the air from the system. The exit point exhausts air at an angle to create a reverse thrust.

A reverse thrust braking system includes an inlet having propeller fan blades that accelerate air coming into the system. A plurality of chambers receive the air accelerated through the inlet by the propeller fan blades. An exit point receives air from at least one of the plurality of chambers and exhausts the air from the system. The exit point exhausts air at an angle to create a reverse thrust.

A braking device comprising a body mounted for rotation about a first axis; means for rotating the body about the first axis; comprises a second axis, a third axis and a fourth axis, the braking device being configured as to enable the body to further rotate about the second axis and the third axis, the first axis being oriented with respect to the second axis at an alpha angle () which is greater than 0 degrees, the second axis being oriented with respect to the fourth axis at a beta angle () which is greater than 0 degrees and less than 90 degrees, the third axis being the precession axis about which the precession of the body occurs as a result of rotating the body about the first axis and applying torque to the body about the second axis.