In October 2004, Messier-Bugatti was selected as a supplier on the Boeing 787 Dreamliner. The contract was quite special, in fact, since it was for electric brakes – a world first! We talked to François Tarel, head of the Messier-Bugatti wheels and brakes division.

How does an electric brake work?

In an electric braking system, electronic control units and electrical wiring replace hydraulic lines and equipment, and electromechanical actuators replace hydraulic pistons. When the pilot steps on the brake pedal, a computer sends information to a control box, which converts these electrical signals into an electromechanical command: the actuators on the brake ring, replacing the hydraulic pistons, press the carbon disks against each other, as in a conventional hydraulic system, to brake the aircraft.

What are the advantages for Boeing in choosing this type of technology?

Boeing’s aim with the 787 Dreamliner is to develop “the most economical jetliner for the airlines,” and that’s what inspired its push for an “all electric” aircraft. An “all electric” aircraft simply means one that uses electricity to replace all other forms of onboard energy, especially hydraulic. This offers a host of advantages, in terms of lower parts count, easier installation and operation, reduced maintenance costs, etc. Boeing wants the introduction of electric brakes to mark a major step forward for the airlines.

For a brake manufacturer like Messier-Bugatti, what does this innovation mean?

We’ve been developing “more electric” systems at Messier-Bugatti for several years now, including full brake by wire, electrohydraulic equipment, etc. The A380 is an excellent example of our proven capabilities in the development of electronic equipment and software. Boeing’s choice of an “all electric” architecture is a further step along this path.

The merger of Snecma and Sagem provides excellent opportunities for synergies as well. For example, we have decided to assign the production of the brake control electronics to Sagem Défense Sécurité. In short, we’re bringing together two centers of excellence within SAFRAN to bring this new technology to market under the best conditions. Furthermore, this innovation is a natural development of Messier-Bugatti’s braking business and should consolidate our leadership. There is no doubt that electric brakes will be as much of a success as was the introduction of carbon brakes, which drove us to our current leadership position in this market.