A Swiss startup is developing a hydrogen-powered, vertically-taking-off jet that promises to be faster, quieter, and more environmentally friendly than existing models…
I t’s a tough ask, but Swiss startup Sirius Aviation AG is aiming to clean up the airways while also appealing to James Bond villains with its Sirius Millennium Jet. It will be the first hydrogen-powered aircraft that can take-off and land vertically – without the need for fuel or batteries.
Designed in collaboration with the Sauber Group with major assist from BMW’s Designworks, it skillfully blends the aerodynamics of a jet with the versatility of helicopters.
Sirius intends to have the aircraft certified and in service by 2028 in two variants – one private and one taxi. The three passenger private business jet will have a range of 1,850 km and the five passenger taxi jet – 1046 km. Both will offer a cruise speed of up to 520 km/h, and an altitude capability of 30,000 feet.
The propulsion system uses hydrogen fuel cells to power 28 electric ducted fans. It’s similar to the ducted-fan electric Lilium Jet concept, although Sirius has incorporated a distinctive V-shaped tail to clap back.
Generating less than 60 decibels at a distance of 100 metres, it’s rated dishwasher loud and therefore quiet enough to do its thing in more populated areas where noise pollution is – noisy.
Realistically, these jets could set a new industry standard for flight distance and speed. The fastest known eVTOL so far, the Joby S4, has a top speed of 330 km/h and a 240 km range, while Horizon’s hybrid Cavorite X5 is expected to top out at 450 km/h with an 800 km range. Challenge accepted.
Several companies have tried and tested hydrogen, but none have gotten fuel certified or been given thumbs up for commercial use. Knowing that hydrogen’s energy density is three times that of traditional jet fuel and a hundred times that of lithium-ion batteries – Sirius is already ahead of the game. Go science.
By Bill Varetimidis
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