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The chickens are at the upper limit of what Wing’s drones — which are half-copter, half-plane hybrids — are capable of carrying.

Why did the half-plane, half-helicopter not work?

However, the half-helicopter, half-plane never really took off and it was scrapped in 1962.

So Fairey came up with the Rotodyne, classed as a composite helicopter - essentially half-plane, half-helicopter.

The half-plane, half-helicopter design aims to overcome chronic obstacles to high-speed helicopter flight by combining the advantages of fixed-wing aircraft with those of a standard helicopter -- allowing it to fly at 220 knots or 400 km/hour.