| 摘要 |
A rocket vehicle comprising a body formed of a lightweight material, such as foamed plastic, and a center support tube mounted within the vehicle body and formed of a lightweight, rigid material having relatively high structural strength, such as aluminum. The tube is utilized to support a rocket motor mounted within the vehicle body and to support ballast and the forward end of the vehicle body. The tube serves to transfer the thrust loads of the rocket motor into the relatively weak lightweight body material by presenting a large shear surface between the body and the tube. In a preferred method of manufacture, the support tube is positioned within a mold cavity having a configuration complementary with the external configuration of the rocket vehicle body. Foamed material is then introduced into the mold to form the vehicle body about the support tube.
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