自20世纪初以来,采用完全的电动方法提高弹丸的加速度,已着手理论和试验方面的研究工作。早在1902年,贝克兰德曾制造了一种感应发射装置,能够将10kg重的弹丸加速到100m/s。1916～1919年,法国人福松-维尔布勒研究了轨道发射装置,而且成功地将50g重的箭型弹加速到200m/s。 Since the early twentieth century, the use of complete electric methods to increase the acceleration of projectiles has been the subject of theoretical and experimental research. As early as 1902, Beckland had manufactured an inductive launcher capable of accelerating a 10 kg heavy projectile to 100 m / s. From 1916 to 1919, the Frenchman Fuso-Wilbur studied the orbital launch device and successfully accelerated the 50g heavy arrow bomb to 200m / s.