You would be forgiven for thinking that the bubble had burst on the airship industry. Finnish company Kelluu, however, remains loyal to the sector. Based in Joensuu, eastern Finland, it operates what the company calls “the world’s largest airship fleet” and has a clear business case, as CEO Janne Hietala explains.

“We operate in a niche between drones and aircraft,” he says. “The former have a short flight time, while the latter are expensive, environmentally harmful and fly above the clouds.”

For what Kelluu does with its airships, clouds are a problem. Its business is imaging and instead of flying people from place to place, Kelluu’s airships photograph the Earth. With state-of-the-art cameras, they can capture incredibly detailed photographs of a wide area. “With just five of our airships, we are able to photograph the entirety of Germany with a level of accuracy that no satellite can match,” says Hietala.

In addition, its cameras can provide hyperspectral imaging, which its clients can use to monitor metrics such as humidity and temperature. The images can also be used to construct detailed 3D maps, or what the company calls “digital twins”. Clients are diverse and range from forestry companies that are keeping an eye on the health of the land and power companies monitoring the state of its lines in remote locations to urban planners who need to know how the traffic is flowing. The market that Kelluu is set to revolutionise is large. According to Hietala, the annual cost of monitoring critical infrastructure, such as electricity networks, is approximately €60bn globally.

“No other technology can achieve the same level of efficiency as airships can,” says Hietala. In an increasingly environmentally conscious world, the fact that Kelluu operates the airships with hydrogen, and thus without emissions, is another factor in its favour.

Hietala likens the company’s airships to satellites orbiting Earth. Unlike drones or helicopters, the airships don’t need human pilots and can be programmed to cover a certain area. “Their flight time is about 12 hours and all we need to do is have a flight-control centre that tracks where they fly,” he says.

But it has not always been smooth sailing, or floating, for Kelluu. It is doing something totally new and regulators are still playing catch-up. “All of our pilots have licences and have been trained to communicate with other air traffic,” says Hietala. “But sometimes the regulators still think that we just fly drones.”

The company’s airships usually fly at a maximum altitude of 150 metres and because of their snazzy silver bodies have startled the occasional onlooker more than once. “Quite often people call the energy number and claim to have seen a UFO,” says Hietala with a laugh.
kelluu.com

Other airship firms on the rise:

1.
LTA (Lighter Than Air) Research, founded by Google’s co-founder Sergey Brin, is building next-generation airships for human transportation.

2.
UK-based Hybrid Air Vehicles is developing passenger zeppelins that can stay airborne for up to five days and have a range of 4,000 nautical miles.

3.
Flying Whales is a French company developing cargo zeppelins that can carry up to 60 tonnes.