Electric Sail For Spacecraft Propulsion

The magnetic sail was proposed by dana andrews and robert zubrin working in collaboration in 1988.

Electric sail for spacecraft propulsion.

Electric sail space flight dynamics and controls. Trades and analyses performed in a two year nasa investigation of electric sail propulsion systems. The demonstration of electric propulsion was an ion engine carried on board the sert 1 space electric rocket test spacecraft launched on 20 july 1964 and it operated for 31 minutes. An electric sail also known as an electric solar wind sail or an e sail is a proposed form of spacecraft propulsion using the dynamic pressure of the solar wind as a source of thrust.

An interplanetary vehicle using one of these methods would follow a rather different trajectory either constantly thrusting against its direction of motion in order to decrease its distance from the sun or constantly thrusting along its direction of motion to increase its distance from the sun. At that time andrews was working on a concept to use a magnetic scoop to gather ions to provide propellant for a nuclear electric ion drive spacecraft allowing the craft to operate in the same manner of a bussard ramjet but without the need for a proton proton fusion propulsion drive. It creates a virtual sail by using small wires to form an electric field that deflects solar wind protons and extracts their momentum. A follow up mission launched on 3 february 1970 sert 2 carried two ion thrusters one operated for more than five months and the other for almost three months.

The electric solar wind sail or electric sail for short is a propulsion invention made in 2006 at the kumpula space centre by pekka janhunen for e sail related news please see the electric sail blog it is in finnish but carries a translate button to your language. Requiring no propellant it can be used to thrust in any direction and both accelerate and decelerate spacecraft operating within planetary magnetospheres in interplanetary space and interstellar space. The total force exerted on an 800 by 800 meter solar sail for example is about 5 newtons 1 1 lbf at earth s distance from the sun making it a low thrust propulsion system similar to spacecraft propelled by electric engines but as it uses no propellant that force is exerted almost constantly and the collective effect over time is great. Trajectory tracking control of electric sail with input uncertainty and saturation constraint.

Solar wind electric sail propulsion. Some spacecraft propulsion methods such as solar sails provide very low but inexhaustible thrust. Unlike magnetic sails and electric sails it can generate both lift and drag and its maximum velocity is not limited by the speed of the. See also the continuously updated list of scientific papers and the list of frequently asked questions.

The idea was first conceptualised by pekka janhunen in 2006 at the.