Sirius CEO-JET and Adventure Jet: Pioneering the Future of Hydrogen Aviation

In collaboration with BMW Group Designworks, Sirius Aviation AG has unveiled two new hydrogen-powered luxury business jets: the Sirius CEO-JET and the Sirius Adventure Jet. The global debut of these aircraft took place on June 20, 2024, at the MOVE Expo in London, a premier tech mobility event. Alexey Popov, Founder and CEO of Sirius Aviation AG, led the presentation alongside BMW Group Designworks, showcasing the jets' cutting-edge features and upscale design.

Popov emphasized the company's mission to revolutionize air travel with sustainable solutions, stating, "The CEO-JET offers an eco-friendly option for business travel, while the Adventure Jet opens new horizons for global tourism and exploration."This development represents a significant step forward in addressing the environmental concerns associated with private aviation.\

By utilizing hydrogen-electric propulsion, Sirius Aviation aims to bridge the gap for individuals who desire to own a business jet while prioritizing eco-consciousness. The unveiling of these aircraft demonstrates the trend towards sustainable luxury travel and the aviation industry's efforts to reduce its carbon footprint. 

Hydrogen-Electric Powertrain

Hydrogen fuel cells offer a high weight-to-power density ratio, making them ideal for aviation applications. The liquid hydrogen used in the CEO-JET needs to be stored at extremely low temperatures, but it provides a significant amount of energy, enabling longer flight ranges compared to battery-only electric aircraft. The CEO-JET can achieve a range of up to 1,150 miles (1,850 km) per trip, which is substantially higher than many other eVTOL aircraft.

The CEO-JET hydrogen-electric powertrain combines the benefits of hydrogen fuel cells with electric propulsion. This system includes a liquid hydrogen fuel tank that feeds a fuel cell stack. The fuel cell stack generates electricity through a chemical reaction between hydrogen and oxygen, producing water as a byproduct. This electricity is then used to charge the main battery banks, which power the aircraft's 28 ducted fans. The system offers several advantages:

• High energy density and efficiency, with a weight-to-power density ratio ideal for aviation applications
• Longer flight ranges compared to battery-only electric aircraft, up to 1,150 miles (1,850 km) per trip.
• Cost-effectiveness, with an estimated $500 to fully refill the fuel tank
• A regenerative power system featuring a booster battery pack that recharges during flight, enhancing operational efficiency

Here’s a detailed breakdown of how it works:

• Liquid Hydrogen Fuel Tank: The aircraft has a liquid hydrogen fuel tank that stores hydrogen at extremely low temperatures.
• Fuel Cell Stack: Liquid hydrogen is fed into a fuel cell stack, which reacts with air oxygen. This chemical reaction generates electricity and produces water as a byproduct.
• Electricity Generation: The electricity generated by the fuel cell stack is used to charge the main battery banks.
• Powering the Fans: The charged batteries then power the aircraft's 28 ducted fans responsible for propulsion.

This system ensures zero carbon emissions, as the only byproduct is water, making it an eco-friendly alternative to traditional jet fuel-powered aircraft.

The CEO-JET's propulsion system is designed to be much quieter than traditional helicopters. The ducted fans and electric motors produce noise levels comparable to a household dishwasher (less than 60 dB), making the aircraft more community-friendly and reducing noise pollution.

The CEO-JET features a booster battery pack that is active for only 90 seconds per flight cycle and recharges during flight. This regenerative power system ensures the aircraft can maintain optimal performance without frequent battery replacements, enhancing its operational efficiency.