Letter to the editor | Hang on to your Hills Hoist

Updated July 4 2017 - 11:56am, first published July 3 2017 - 1:01pm

LETTER TO THE EDITOR

Householders should be aware of a new development in the world of drone technology. It is the Dragonfly Drone. Invented by a backroom professor at Oxford, it uses the principle of the dragonfly wing instead of the usual rotors. This means the noise it generates is above the pitch detectable by the human ear. The device contains a camera and a microphone. It is small at 12cm long and lightweight.

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