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  2. Vortex engine - Wikipedia

    en.wikipedia.org/wiki/Vortex_engine

    The vortex is begun by briefly turning on a diffuse heater (83) and electrically driving the turbines (21) as fans. This moves mildly heated air into the vortex arena (2). The air must have only a mild temperature difference because large temperature differences increase mixing with cold ambient air and reduce efficiency.

  3. SpaceX rocket engines - Wikipedia

    en.wikipedia.org/wiki/SpaceX_rocket_engines

    Channels etched into the Merlin 1D nozzle enable regenerative cooling preventing exhaust heat from melting it.. Since the founding of SpaceX in 2002, the company has developed four families of rocket engines — Merlin, Kestrel, Draco and SuperDraco — and since 2016 developed the Raptor methane rocket engine and after 2020, a line of methalox thrusters.

  4. Comparison of orbital rocket engines - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_orbital...

    Engine Origin Designer Vehicle Status Use Propellant Power cycle Specific impulse (s) [a] Thrust (N) [a] Chamber pressure (bar) Mass (kg) Thrust: weight ratio [e] Oxidiser: fuel ratio

  5. Vornado Air - Wikipedia

    en.wikipedia.org/wiki/Vornado_Air

    The "Vortex Action" technology and uniquely-designed blade was also used for Vornado-branded heaters, air purifiers, and humidifiers. Between January 1989 and August 1990, Vornado sold about 135,000 of its fans with a distinctive spiral front grille. In August 1990, competitor Duracraft began offering a cheaper, visually similar fan, and by ...

  6. RS-25 - Wikipedia

    en.wikipedia.org/wiki/RS-25

    The RS-25 engine consists of pumps, valves, and other components working in concert to produce thrust. Fuel (liquid hydrogen) and oxidizer (liquid oxygen) from the Space Shuttle's external tank entered the orbiter at the umbilical disconnect valves and from there flowed through the orbiter's main propulsion system (MPS) feed lines; whereas in the Space Launch System (SLS), fuel and oxidizer ...

  7. Graphite-Epoxy Motor - Wikipedia

    en.wikipedia.org/wiki/Graphite-Epoxy_Motor

    The Graphite-Epoxy Motor (GEM) is a family of solid rocket boosters developed in the late 1980s and used since 1990. GEM motors are manufactured with carbon-fibre-reinforced polymer casings and a fuel consisting of HTPB -bound ammonium perchlorate composite propellant .

  8. Space Shuttle Solid Rocket Booster - Wikipedia

    en.wikipedia.org/wiki/Space_Shuttle_Solid_Rocket...

    Because the parachutes provide for a nozzle-first impact, air is trapped in the empty (burned out) motor casing, causing the booster to float with the forward end approximately 30 feet (9 m) out of the water. Solid rocket booster of the STS-131 mission being recovered and transported to Cape Canaveral by the MV Freedom Star.

  9. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.