Electric sails are propulsion systems that generate momentum via the deflection of stellar wind particles through electric forces. Here, we investigate the relative merits of electric sails and light sails driven by stellar radiation pressure for F-, G-, K- and M-type stellar systems. It has been shown that electric sails originating near M-dwarfs could attain terminal speeds of & 500 km/s for minimal payload masses. In contrast, light sails are typically rendered ineffective for late-type M-dwarfs because the radiation pressure is not sufficiently high to overcome the gravitational acceleration. Analysis indicates that electric sails are better propulsion systems than light sails in proximity
to most stars.
Meanwhile back on Earth, we have sunshine with just the odd fluffy clouds today in Southern Spain with 20 Centigrade and 30% humidity. Wind: 24 KPH NW.
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