公开(公告)号：US20210102790A1

公开(公告)日：2021-04-08

申请号：US16595609

申请日：2019-10-08

Applicant: BAE Systems Information and Electronic Systems Integration Inc

Inventor： David J. Schorr ,  Matthew F. Chrobak ,  Thomas T. Scarberry ,  Richie Spitsberg ,  Paul E. Turner

IPC: F42B15/10 ,  F02K9/76 ,  F02K9/62 ,  F02K9/97 ,  F02K9/86

Abstract: A rocket in one example includes separate chambers for storing two thrust grains: an initial thrust grain and a boost thrust grain. The initial thrust grain is stored in a first chamber and the boost thrust grain is stored in a second chamber. The initial thrust grain is ignited separately from the boost thrust grain, such as in a two-stage process where the initial thrust grain is ignited before, or at the same time as, the boost thrust grain. The initial thrust grain has a large surface area (different burn pattern) relative to the boost thrust grain, which causes the initial thrust grain to have a shorter burn time than the boost thrust grain.