VoltAero starts flight tests with hybrid Cassio

+VIDEO French company VoltAero has started flight tests with its hybrid powered Cassio aircraft.

The Cassio is based on the fuselage of a Cessna 337, which has two engines mounted front and aft on the centreline. VoltAero has fitted two electric motors facing forward on the wing, removed the front piston engine and retained the pusher engine at the rear.

The two electric motors are from French aerospace company Safran Electrical & Power. The ENGINeUS™ 45 delivers a continuous power of 45kW and features built-in, dedicated control electronics.  It is part of a family of ENGINeUS motors going up to 500kW.

“I am very pleased with the testing as we accumulate time aloft and open up the aircraft’s flight envelope,” said Jean Botti, VoltAero’s CEO and Chief Technical Officer.

“The current test phase is with the powertrain for our six-seat Cassio version, to be followed by validation of the final aerodynamic and powertrain configurations on both the four- and nine-seat Cassio versions.”

Cassio 1 is piloted by VoltAero’s technical director Didier Esteyne, operating from VoltAero’s headquarters facility at the Royan-Médis Aérodrome in France.

“Flying on the power of Safran’s ENGINeUS motors is truly remarkable, with no vibration and extremely low noise levels,” said Esteyne. “It confirms that our Cassio aircraft will bring an entirely new experience to aviation.”

VoltAero says the flight tests are a major step toward validating the electric and hybrid-electric powertrains for Cassio aircraft. The company is evolving a family of aircraft with four to nine seats, for operation by private owners and air taxi/charter companies for point-to-point regional travel, and in various utility category applications.

In its nine-seat version, the Cassio aircraft will utilise electric motors along with VoltAero’s own design aft-facing hybrid power module, which combines an internal combustion engine and three electric motors. The prototype VoltAero hybrid power module is being ground-tested at the moment.

VoltAero Safran electric motors
VoltAero’s Cassio 1 testbed aircraft has been equipped with two Safran ENGINeUS™ 45 electric motors, installed in forward-facing positions on the wings. Photos & video: VoltAero

For Safran, it’s also an important milestone.

“Safran is proud to be powering the Cassio 1 aircraft as VoltAero brings a new dimension to electric aviation,” said Hervé Blanc, vice president & general manager of the Electrical Systems and Motors Division at Safran Electrical & Power.

“We are fully committed to supporting VoltAero throughout the flight test phase and look forward to the company’s future production of Cassio aircraft.”


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