The Harbin/CHDRI Z-6, (Z - Zhishengji - vertical take-off aircraft), is a Chinese helicopter development based on the Harbin Z-5, itself a licence-built / reverse engineered Mil Mi-4. A limited production run was terminated after performance was found to be inferior to its Z-5 progenitor (sources vary from 6 to 15 completed out of orders for 100).
The Harbin/CHDRI Z-6, (Z - Zhishengji - vertical take-off aircraft), is a Chinese helicopter development based on the Harbin Z-5, itself a licence-built / reverse engineered Mil Mi-4. A limited production run was terminated after performance was found to be inferior to its Z-5 progenitor (sources vary from 6 to 15 completed out of orders for 100).
Source: Wikipedia "Harbin/CHDRI Z-6" · CC BY-SA 4.0
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