Gao Hanjie installs the rotor blades on his homemade helicopter, which is 6-meter-long and 350kg
Gao Hanjie installs the rotor blades on his homemade helicopter, which is 6-meter-long and 350kg
Gao Hanjie installs the rotor blades on his homemade helicopter, which is 6-meter-long and 350kg