September 9, 2010
By Alton K. Marsh
The all electric Cri-Cri (French for cricket), jointly developed by EADS Innovation Works, Aero Composites Saintonge, and the Green Cri-Cri Association, has flown at Le Bourget airport near Paris. It is claimed to be the first four-motor all-electric aerobatic airplane.
The aircraft is supported by the French Museum of Air and Space. All systems performed well and the airplane returned safely after seven minutes, EADS said in a press release.
“This aircraft flies very smoothly, much more quietly than a plane with conventional propulsion,” said Didier Esteyne, who piloted the all-electric Cri-Cri. “But we are still at the beginning and have a lot to learn. We are allowed to start aerobatic maneuvers only after five hours of flight and 15 landings.”
“The Cri-Cri is a low-cost test bed for system integration of electrical technologies in support of projects like our hybrid propulsion concept for helicopters,” said Jean Botti, EADS’s chief technical officer. “We hope to get a lot of useful information out of this project.”
The aircraft uses lightweight composite structures, four brushless electric motors with counter-rotating propellers, and high energy-density lithium batteries. Developers think the aircraft will be able to fly for 30 minutes at a speed of 68 mph and climb at 1,000 feet per minute.
Other research projects at EADS include algae-based biofuel and a helicopter hybrid propulsion system combining electrical power with piston engines.
Aircraft Power and Fuel
Fourteen hours and four minutes after departing Cincinnati, Solar Impulse landed at Washington Dulles International Airport. The aircraft landed at 12:15 a.m. Eastern June 16.
There was a moment on the flight of the solar-cell and battery-powered Solar Impulse when Swiss pilot Bertrand Piccard thought clouds might rob his aircraft of power.
Solar Impulse will fly from Dallas/Fort Worth to St. Louis June 3 despite a hangar at Lambert-St. Louis International Airport that was damaged by tornadoes.