The best gadgets

The Upside Down Helicopter

This is the remote controlled helicopter that can fly upside down. Its two pairs of contra-rotating coaxial main rotors unclip easily from each swash plate–when inverted and reattached, the rotors provide the same amount of lift and gyroscopic inertia to keep the helicopter balanced for up/down and left/right flight.


We will be happy to see your thoughts

Leave a reply


Pin It on Pinterest