At the 2024 Farnborough International Airshow, VoltAero in Medis, France, and Sigma Air Mobility from Scandinavia announced a memorandum of understanding (MoU) to explore advanced air mobility solutions using VoltAero's Cassio electric-hybrid aircraft. This collaboration includes the potential for route demonstration pilot projects and the identification of services for Cassio in its air ambulance version. The partnership aims to leverage VoltAero's unique parallel electric-hybrid propulsion system along with Sigma Air Mobility's expertise as a network operator to enhance regional air mobility solutions. The MoU also involves the development of industry technical standards for airport recharging infrastructures and related technologies, as well as potential collaboration on operating models, economics, and decarbonization trends. VoltAero's CEO & Chief Technology Officer, Jean Botti, expressed optimism about the agreement, highlighting the focus on realistic regional air mobility solutions with the Cassio aircraft and its parallel electric-hybrid propulsion system. Christophe Lapierre, the CEO of Sigma Air Mobility, emphasized the significant market opportunity for regional air mobility in the 300-plus kilometer range, citing the advantages of electric-hybrid aircraft leveraging existing infrastructure. The Cassio aircraft family, designed for various operators including commercial, air taxi/charter, private owners, and utility-category services such as cargo and medical evacuation, offers models like the Cassio 330, Cassio 480, and Cassio 600. These aircraft use the ENGINeUS 100 electric motor for all-electric power during specific flight phases and a hybrid feature with an internal combustion engine for recharging the batteries and ensuring fail-safe functionality. VoltAero plans to assemble the Cassio aircraft at a new facility in France's Nouvelle-Aquitaine region, showcasing a commitment to innovation and sustainable aviation technologies.