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Download PDF by Martin Tajmar: Advanced Space Propulsion Systems

By Martin Tajmar

ISBN-10: 3211838627

ISBN-13: 9783211838624

ISBN-10: 3709105471

ISBN-13: 9783709105474

Space propulsion structures have an exceptional effect on our skill to trip to different planets or how reasonable a satellite tv for pc offers television courses. This publication offers an updated evaluation of every kind of propulsion structures starting from classical rocket expertise, nuclear propulsion to electrical propulsion platforms, and additional to micro-, propellantless or even step forward propulsion, that's a brand new application lower than improvement at NASA. the writer exhibits the restrictions of the current thoughts and the way they can seem like sooner or later. ranging from ancient advancements, the reader is taken on a trip displaying the superb know-how that has been wear carry for many years to be rediscovered within the close to destiny for questions like how we will be able to even succeed in different stars inside a human lifetime. the writer is actively thinking about complicated propulsion learn and contributes together with his personal adventure to a few of the provided issues. The ebook is written for an individual who's drawn to how house commute may be revolutionized.

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Chapter 3 Launch Assist Technologies As we have seen, a completely reusable launch vehicle with a good payload capacity - preferably single-stage-to-orbit - is very difficult to achieve with purely onboard chemical propulsion systems. In this chapter we will evaluate technologies that either act externally or use electromagnetic energy to enhance the overall launcher performance. 1 Reduction Of Required 41) Referring to the exponential factor determining the payload mass fraction in Tsiolkovski's eq.

Top rail guns can presently accelerate a 2 kg payload to a velocity of 4 kmls along 6 m rails separated by 5 cm. Using Eq. 5 million Ampere! This of course causes serious damage to the rails due to heating as this very large current passes through. Many railguns of this size could only be used for one shot. The high 50 3 Launch Assist Technologies Coils c::::> Force F BCOil BArmature Fig. 9. Mass driver (coil gUn! principle current need is due to the fact that the magnetic field generated by the rail is very weak - it is similar to a coil but with only one wind round.

A good electrical conductivity of cr= 50-1000- 1 m- I is obtained for ionized air at 2800 K with Cesium seed. For example, let us consider a typical launcher such as the European Ariane 5 rocket. 7 MN. If we want to estimate the electrical power, we need to increase the specific impulse (and therefore thrust assuming a constant mass flow rate) by 10%, we transform Eq. 7) into 1 ( F p= (j. 8) and obtain P = 17 MW for a channel length of 1 m, superconducting magnets providing 20T and a realistic conductivity of cr=650- l m- 1.

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Advanced Space Propulsion Systems by Martin Tajmar

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