A new drive system for flapping-wing autonomous craft has been developed at the University of Bristol, in the UK, using a new method of electromechanical zipping that removes the need for conventional motors and gears (writes Nick Flaherty)...

In UST 12 (February/March 2017) we featured the A33i UAV engine, a spark-ignited single cylinder two-stroke developed through a collaboration between Power4Flight, Currawong Engineering and Cobra MOTO, the latter of which aptly spun off the Cobra Aero...