Astrobotic Breaks Records for Hot Firing Rotating Detonation Rocket Engine (RDRE)
Interesting Engineering
Watch: Astrobotic's Chakram engine aces record 300-second hot fire
Astrobotic broke the record for the longest duration hot firing of an RDRE, with a 300-second burn of its Chakram prototype engine.
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据太空启动公司称，其中包括破纪录的 300 秒燃烧–这是迄今为止 RDRE 发动机持续时间最长的热点火。在测试期间累计的 470 秒热点火过程中，两台发动机均未受损。
Chakram 的高效引爆过程
传统的火箭发动机利用的是减磨，而 RDRE 与之不同，它利用的是围绕发动机圆体旋转的超音速爆炸波的快速能量释放。
据 Astrobotic 称，这种引爆过程可将比冲或发动机效率提高 15%。它还能提高推重比，使设计更加紧凑。
在最近的测试中，Astrobotic 的 Chakram 发动机各产生了 4000 磅（1800 公斤）的推力，总运行时间为 470 秒。
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