About the pix I posted; there was a gas powered Cri-cri and they re-designed to this environmental one. In case you're wondering what 4 brush-less electric motors can do, that's what is mounted on this plane.
"Reminiscent of James Bond’s fold-away Acrostar mini-plane,
the Cri-Cri is the world’s smallest electric plane and this week made
its official maiden flight at Le Bourget airport near Paris. Jointly
developed by EADS Innovation Works, Aero Composites Saintonge and the Green Cri-Cri Association, the lillipution aircraft is the first-ever four-engined all-electric aerobatic plane.
Designed with numerous innovative technologies, the Cri-Cri boasts a
lightweight composite structure that reduces the weight of the entire
plane, allowing for the additional weight of the necessary batteries and
the four brushless electric motors and counter-rotating propellers. All
this leads to zero CO2 emissions and less noise compared to thermal
propulsion that also utilizes higher-energy density lithium batteries.
With the batteries, the Cri-Cri is able to maintain 30 minutes of
autonomous cruise flight at 110km/h or an alternative 15 minutes of
autonomous aerobatics at speeds reaching up to 250 km/h. For the test
flight, the plane remained airborne for 7 minutes before landing.
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,” stated Jean Botti, EADS’s Chief
Technical Officer. “We hope to get a lot of useful information out of
this project.”
The Cri-Cri is not the only ‘environmental form of air travel’ that
EADS is researching. Currently the company is also experimenting with algae based biofuel
and a helicopter hybrid propulsion system combining electrical power
with piston engines. With such technologies being enhanced, could it
only be a matter of time before air travel is no longer one of the
largest polluters on the planet, but one of the cleanest?"
http://inhabitat.com/cri-cri-the-worlds-smallest-electric-plane-takes-flight/