Engines run and rotors turn, so it's nearly time for lift-off for Navy's uncrewed helicopter

The Royal Navy's first uncrewed helicopter has successfully completed its ground trials, moving it one step closer to taking its first flight.

The Proteus Technology Demonstrator is the size of a traditional helicopter, but has a pilot on the ground tasking the aircraft rather than flying it.

The helicopter, which is being developed by Leonardo under a £60m programme, has had its engines, systems and rotors tested on the ground – a process known as flashing up.

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Autonomous – and full-sized

Proteus, which was designed and manufactured in less than two-and-a-half years in Yeovil, is believed to be one of the world's first full-sized autonomous helicopters.

Flashing up is the first step towards creating a truly autonomous vertical take-off and landing aircraft in this weight class.

It will help both the designers and the Royal Navy understand what similar machines will be needed in the future and how they will operate.

This could mean a crewless helicopter working either individually or in tandem with other uncrewed and crewed aircraft.

Hybrid air wing for hybrid warfare

"It combines cutting-edge technology, the experience of recent conflicts and has enormous potential to shape the Royal Navy's future hybrid air wing," explained Captain David Gillett of the Royal Navy's Develop Directorate.

Initially, the demonstrator is being assessed for the ability of autonomous systems to support anti-submarine operations.

But with a payload bay capable of carrying up to a tonne of equipment, a helicopter like Proteus could perform other missions.

These could include airborne surveillance and control, search and rescue, logistics re-supply for ground forces, weapon delivery and intelligence-gathering.

Let Proteus take the strain, not the aircrew

Proteus will be tasked to patrol specific maritime areas, drawing on information provided by other allied ships, helicopters, submarines and detection systems to calculate the best chance of success in finding an underwater adversary.

In order to detect submarines, Proteus can drop sonobuoy listening devices into the ocean to search the depths for the tell-tale acoustic signs that emanate from submarines.

Once located, the system has the ability to report its findings back to the mission commander.

By embracing drone helicopters, the Navy aims to search wider stretches of ocean for longer periods without putting strain on aircrew, who could be deployed on other critical sorties.