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v2 Chapter 454 Beggar Edition Falcon Nine Rocket
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v2 Chapter 456 Rocket code "Shenshu Jianmu"
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... d of technology?"
Difficult? Zhang Jun asked subconsciously.
Yu Chengwu nodded and said, "In fact, the principle is very simple and technically not too complicated, but it is difficult in some core technologies and manufacturing processes.
First of all, the rocket's arrow body is very heavy, even the empty arrow body without fuel is very heavy. If the parachute is used for parachute recovery, it means a large set of parachutes.
However, the weight of the umbrella bag ...
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