飞机主要是不够快。 Several years back there was an experiment (the Space Tether Experiment) to drag a conductor through the Earth's magnetic field with the Space Shuttle. I don't know how viable this is though because I think it saps orbital energy.
地磁场强度: The field ranges between approximately 25,000 and 65,000 nT (0.25–0.65 G). By comparison, a strong refrigerator magnet has a field of about 100 gauss ( 0.010 T).[14] http://en.wikipedia.org/wiki/Earth%27s_magnetic_field
H*g
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31.869 μT (3.2 × 10−5 T) – strength of Earth's magnetic field at 0 ° latitude, 0° longitude
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【在 H********g 的大作中提到】 : 地磁场强度: : The field ranges between approximately 25,000 and 65,000 nT (0.25–0.65 G). : By comparison, a strong refrigerator magnet has a field of about 100 gauss ( : 0.010 T).[14] : http://en.wikipedia.org/wiki/Earth%27s_magnetic_field