Voorbeelden van propulsion

• Only with the high exit velocities possible with pulsed laser ablation propulsion is it possible to overcome this problem.

• The gradient in muscle tension created along the intestine (increased in jejunum and decreased in ileum) may promote propulsion of worms in the lumen.

• Propulsion obtains the dimensions it requires from hull, determines the ver tical center of gravity for stability, and provides total thrust to resistance.

• This hopper included a translational offset mass in order to cause the tipping action that helped in forward propulsion.

• This is a useful generalized account, serving as an introduction to the short discussion of hypersonic propulsion that is given later.

• Also, carangiform propulsion is more convenient for engineering realization.

• Calculated efficiencies are found to be insufficient for propulsion applications that require short periods of acceleration but ion-beam propulsion shows some potential for prolonged flights.

• Here, the selective pressures for efficient maintenance of high-speed propulsion appear to be responsible for the convergent evolution of caudal fins of high aspect ratio.

• It also includes fault-tolerant control of a chemical process, and of a ship propulsion system, and of a steam generator.

• They are of interest because they may represent the first economically viable application of laser ablation propulsion.

• Here, we do not want the extraction short hairs = cilia propulsion.

• Advancements in computer and control technologies have, in this case, enabled propulsion by delicately controlling elastic fins on the fish.

• This subject has been carefully and continuously studied ever since jet propulsion became technologically feasible.

• Such a control strategy allows us to influence forward propulsion to assure constant gait velocity.

• In addition, it provides a method of generating plasma magnetospheres for laboratory simulation of astrophysical studies and space propulsion.