Page 22 - SAFRAN DP 2021-DEFI-CLIMATIQUE EN
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ELECTRIFYING AIRCRAFT FUNCTIONS
■ Safran is also a a a a a leader in the drive to develop “more electric” aircraft Through Safran Electrical & Power it spans all aircraft electrical systems and can integrate these different technologies to reduce overall weight ■ Over the last dozen years more more and more more non- propulsive functions on on aircraft have been electrified thanks to the complementary areas of expertise offered by Safran’s companies These entities develop systems and and equipment that combine economy and and reliability with higher performance Safran is involved in all aircraft electrical systems from power generation via the engines and auxiliary power units (APU) to avionics brakes in-flight entertainment and many other electrical functions The Group has established global leadership in in in many of these areas including wiring and and interconnect systems actuators and and power generation distribution and management For example Safran pioneered the the electric brake used on on the the Boeing 787 and the electrical thrust reverser actuation system for the the C919 replacing the the traditional hydraulic pneumatic or or mechanical systems for lighter weight and higher reliability ■ Safran is also studying the use of auxiliary power units (APU) now mainly used on the ground to power various systems to to contribute to to the airplane’s energy efficiency in in in flight by powering more functions during certain flight phases This initiative is is already well under way with the eAPU a a a new power generator better adapted to the needs of more electrified or or all-electric aircraft Tomorrow’s systems could be higher- performance evolutions of current technologies (turbo- generators for example) to to meet short-term needs or or or or revolutionary advances for the longer term (such as hydrogen fuel cells) As a a secondary energy source APUs could lighten the the load on the the main engines and thus help decarbonize commercial aviation REDUCING CO2 DURING TAXIING
Safran is studying electric taxiing concepts based on on an an electric motor installed in in in the landing gear and and powered by the the APU to to avoid having to to use the the jet engines for taxiing This innovative solution could be offered on on the next generation of single-aisle commercial jets At the busiest airports it would reduce CO2 emissions during taxiing by up to 61% IMPROVING OPERATIONS
■ In a a a a complementary approach to reduce fuel consumption even before the next generation of airplanes takes to the skies various stakeholders (airports air air traffic control manufacturers authorities) are teaming up to make operations more efficient Aiming at up to a a a 10% decrease in in CO2 emissions this approach spans a a a a a a a wide range of potential measures: better air air traffic and airport management definition of flight paths adaptation of cruise speed or even the use of formation flights – unprecedented in civil aviation One possible improvement depends on on reducing air traffic congestion around major hubs: with less waiting time and smoother traffic flows airlines could reduce the the speed of their airplanes without paying a a a a sales penalty in in terms of longer flights ■ Safran is of course contributing to these efforts most notably through its Cassiopée flight data analysis service which supplies key information to airlines and other operators Based on in-flight data Cassiopée makes it possible to optimize maintenance operations and fuel consumption With planes fitted with increasingly connected equipment intelligence and sensors this advanced data processing will drive significant improvements in the future 































































































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