Solid propellant engine systems are basically less flexible in operation than liquid or hybridpropellant systems.
固体推进剂发动机系统的可调性基本上比液体或混合型的要差。
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To achieve the right mixture of propellant, the patent presents a hybrid rocket motor that would use 3-d stereolithography to essentially print the fuel.
The propellant feature of burning behavior and engine in hybrid engine, the differences to liquid and solid engine and the difficulties of technology in development were analyzed.