If the weight of the engine increases, to improve the thrust-to-weight ratio, the maximum thrust must be increased; however, the thrust generated by relinquishing the high-pressure air released from the poppet valve could hardly compensate for the added weight.
Another issue is the design of the piston.
This is an extremely complex issue, as a simplistic design would surely cause the piston to wear out severely, potentially leading to problems in use. Furthermore, it's known that the technology for continuous small pistons is also very challenging.
In Sun Lei's original design, there were no detailed plans for the piston.
This aspect still required consultation with materials experts.
Zhao Yi immediately brought in Li Rongmao and Zhang Hongtao. To gather more ideas, he called everyone from the team to brainstorm and think collaboratively about a solution.