Tiny flying machines inspired by nature will revolutionise surveillance work
28 July 2011
Tiny aerial vehicles are being developed with innovative flapping wings based on those of real-life insects.
|Ready for take-off: a locust awaits its turn to fly|
Incorporating micro-cameras, these revolutionary insect-size vehicles will be suitable for many different purposes ranging from helping in emergency situations considered too dangerous for people to enter, to covert military surveillance missions.
Supported by the Engineering and Physical Sciences Research Council, world-leading research at the University of Oxford is playing a key role in the vehicles' development.
Dr Richard Bomphrey, from the Department of Zoology, is leading this research, which is generating new insight into how insect wings have evolved over the last 350 million years. "Nature has solved the problem of how to design miniature flying machines," he says. "By learning those lessons, our findings will make it possible to aerodynamically engineer a new breed of surveillance vehicles that, because they're as small as insects and also fly like them, completely blend into their surroundings."
Currently the smallest of state-of-the-art fixed-wing unmanned surveillance vehicles are around a foot wide. The incorporation of flapping wings is the secret to making the new designs so small. To achieve flight, any object requires a combination of thrust and lift. In manmade aircraft, two separate devices are needed to generate these (i.e. engines provide thrust and wings provide lift), this limits the scope for miniaturising flying machines.
But an insect's flapping wings combine both thrust and lift. If manmade vehicles could emulate this more efficient approach, it would be possible to scale down flying machines to much smaller dimensions than is currently possible.