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Spacecraft with electric propulsion Spacecraft name Launch date End of life Thruster type No. Model Propellant Spacecraft customer Thruster prime Comment Program 661A Flight A: 18 Dec 1962: 18 Dec 1962: Ion engine: 1: Cesium: USAF: EOS (Electro-Optical Systems, Inc.) Suborbital, no operation of on-board ion engine Kosmos 21: 11 Nov 1963: 11 Nov ...
The micro-newton colloid-style electric thruster was developed under contract with NASA's Jet Propulsion Laboratory (NASA ST-7 Program) and part of NASA's Disturbance Reduction System (DRS), which serves a critical role in the LISA Pathfinder science mission. [3] [4]
This type of propulsion system has a long tradition throughout the 1990s and today such propulsion units are produced by a number of companies around the world. [6] In the Azipod unit, the electric motor is mounted inside the propulsion unit and the propeller is connected directly to the motor shaft. [7]
Due to this lower thermal velocity, chemical propulsion units become exponentially less effective at higher vehicle velocities, necessitating the use of electric spacecraft propulsion such as PPTs. It is therefore advantageous to use an electric propulsion system such as a PPT to generate high interplanetary speeds in the range 20–70 km/s.
An example of integrated electric propulsion in the Type 45 destroyer (GT: gas turbine; DG: diesel generator) Integrated electric propulsion (IEP), full electric propulsion (FEP) or integrated full electric propulsion (IFEP) is an arrangement of marine propulsion systems such that gas turbines or diesel generators or both generate three-phase [1] electricity which is then used to power ...
The Voith Schneider propeller was originally a design for a hydro-electric turbine. [2] Its Austrian inventor, Ernst Schneider, had a chance meeting on a train with a manager at Voith's subsidiary St. Pölten works; this led to the turbine being investigated by Voith's engineers, who discovered that although it was no more efficient than other water turbines, Schneider's design worked well as ...
These generate enough steam to produce 140,000 shaft horsepower (104 MW) for each pair of the ship's four shafts [2] – two per propulsion plant – plus approximately 100 MW of electricity. [ citation needed ]
Based on data from VX-100 testing, [11] it was expected that, if room temperature superconductors are ever discovered, the VX-200 engine would have a system efficiency of 60–65% and a potential thrust level of 5 N. Optimal specific impulse appeared to be around 5,000 s using low cost argon propellant. One of the remaining untested issues was ...