Scientists at Stanford University in the US have developed a super-sensitive device that can measure the weight of a bird in flight.
The invention, created by Prof David Lentink’s research team, measures the force produced by every wing flap.
The device, described in the Royal Society journal Interface, will enable researchers to carry out tests of miniature drones, to assess more precisely their flight performance.
It has also answered a physics riddle.
This question, Prof Lentink explained, is whether a container or a truck carrying birds changes in weight when the birds inside were flying. Continue reading