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With a conventional chemical propulsion system, 2% of a rocket's total mass might make it to the destination, with the other 98% having been consumed as fuel. With an electric propulsion system, 70% of what's aboard in low Earth orbit can make it to a deep-space destination. [24] However, there is a trade-off.
Lightcraft being propelled by laser. The Lightcraft is a space-or air-vehicle driven by beam-powered propulsion, the energy source powering the craft being external.It was conceptualized by aerospace engineering professor Leik Myrabo at Rensselaer Polytechnic Institute in 1976, [1] who developed the concept further with working prototypes, [2] funded in the 1980s by the Strategic Defense ...
Bell Aerosystems began development of a rocket pack which it called the "Bell Rocket Belt" or "man-rocket" for the US Army in the mid 1950s. [1] It was demonstrated in 1961 but 5 gallons of hydrogen peroxide fuel needed for 21 seconds of flight time did not impress the army.
Another Disclosure Project whistleblower, Philip J. Corso, stated in his book the craft retrieved from the second crash site at Roswell, New Mexico, had a propulsion system resembling Thomas Townsend Brown's gravitators. [14] And, Corso's book featured several gravity control propulsion statements made by Hermann Oberth.
A space vehicle's flight is determined by application of Newton's second law of motion: =, where F is the vector sum of all forces exerted on the vehicle, m is its current mass, and a is the acceleration vector, the instantaneous rate of change of velocity (v), which in turn is the instantaneous rate of change of displacement.
Orbital Mechanics for Engineering Students is an aerospace engineering textbook by Howard D. Curtis, in its fourth edition as of 2019. [1] The book provides an introduction to orbital mechanics, while assuming an undergraduate-level background in physics, rigid body dynamics, differential equations, and linear algebra.
Some proposed spacecraft propulsion mechanisms use electrically powered spacecraft propulsion, in which electrical energy is used by an electrically powered rocket engine, such as an ion thruster or plasma propulsion engine. Usually, these schemes assume either solar panels or an onboard reactor. However, both power sources are heavy.
Ablative laser propulsion — Absolute value — Acceleration — Action — Advanced Space Vision System — Aeroacoustics — Aerobrake — Aerobraking — Aerocapture — Aerodynamics — Aeroelasticity — Aeronautical abbreviations — Aeronautics — Aerospace engineering — Aerospike engine — Aerostat — Aft-crossing trajectory ...