Abstract
The methods of multiwall meteoroid protection for spacecraft have been developed through the Apollo Program. The bumper is shown to be the most important element because it remarkably reduces the damage from the debris impact on the mainwall. The fundamental impact test was carried out to obtain the design data for a dual element meteoroid shield structure using 4mm sphere pellets at velocity 4.1 to 4.8km/s. In all cases, thickness of the Al alloy (2024-T3) bumper and mainwall are 2mm and the distance between them is 170mm. As the first report, one method to separate the pellet of manganesezinc polycrystalline ferrite from the sabot at hypervelocity and its velocity measuring method which modifies a conventional magnetoflyer method are described in this paper.
