Pilot Bert Kammerer at the Alpine Heli competition 2011 in Lodrino, Switzerland.
Bert has been involved in R/C for over 25 years and has flown R/C helicopters since 2004.
Aside from his incredible skills, how is this technically possible?
The R/C helicopter has incredibly light components that don't have to bear large loads, which give it an incredible thrust-weight ratio.
The Scorpion 4525-520 electric engine gives it much more torque than a normal helicopter would provide.
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