ChineseTiger1986
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So you don't have any source from China?
This is the common sense, when being launched by a ballistic missile or a rocket, the velocity to escape the Earth's gravity would be Mach 24.
The DF-ZF has more similar design approach with the HTV-2, both space vehicles are designated to be launched by a space vehicle such as a ballistic missile or a rocket. The initial velocity would be Mach 24, then the re-entry velocity would be around Mach 10 to Mach 20.
If China has decided to develop an aircraft launch version of the DF-ZF, then its velocity would be designated within Mach 5 to Mach 10, probably similar to the X-51.
The ballistic missile/rocket launch version has higher velocity, while the aircraft launch version has greater mobility and flexibility. So these variants are designed according to the needs of the specific missions with the different launch platforms.
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