 | Aircraft | Location & Date | | | | Title | Duration | | My design small coax helicopter powered by MZ202 engine | 00:00:07 | | Remarks | Author / Copyright owner | | Not finished yet. The young girl is balance weight... | Gray Zhu➡ |
 | Aircraft | Location & Date | | | | Title | Duration | | Coaxial helicopter ground testing part2 | 00:00:32 | | Remarks | Author / Copyright owner | | Coaxial helicopter powered by MZ202 engine part2 | Gray Zhu➡ |
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