The manner in which projectile velocity in a rail gun is limited by the presence of atmosphere in the gun tube is studied. In particular, the authors solve the equation of motion for the acceleration of the armature and projectile, accounting for both the decelerating force exerted by the atmosphere and the time decay of the current profile. From the solution, a characteristic time is derived which indicates quantitatively when the effect of the atmosphere can be expected to be significant. Results of the calculation are then compared qualitatively with results from two recent experiments: one in which atmospheric effects are nearly negligible and one in which they are not.


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    Title :

    Atmospheric effects on projectile acceleration in the rail gun


    Additional title:

    Atmosphaerische Einfluesse auf die Beschleunigung des Geschosses eines Eisenbahngeschuetzes


    Contributors:
    Powell, J.D. (author) / Batteh, J.H. (author)

    Published in:

    Journal of Applied Physics ; 54 , 12 ; 7195-7197


    Publication date :

    1983


    Size :

    3 Seiten, 8 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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