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Are Electric Propulsion Systems Coming
to Commercial Aircraft?
Dr. M.J. Benzakein AVP Aerospace and Aviation Research
EnergyTech2015
Nov. 30, 2015
Are Electric Propulsion Systems Coming to
Commercial Aircraft?
• History
• Why?
• Potential Architectures
• Challenges and Opportunities
The History
Efficiency Trends with Core and Propulsor Improvements
Propulsion system improvements require advances in both propulsor and
core technologies
Variation in Core Power with Turbine Inlet Temperature
Potential Electric Propulsion
Architecture
Initial Findings
• Battery powered will be restricted to general
aviation and commuter airplanes
• Fuel cells will not factor in as a propulsion device
in the foreseeable future
• Electric machines (generators, motors, power
converters) are the answer
• Non-cryogenic
• Cryogenic—will not be a factor in commercial
aircraft for the next 30 years
Motor Related Technologies and Power Electronics
Technology Benefits after 15 years (2027)
Technology Benefits after 30 years (2042)
Challenges and Opportunities
Challenges:
Need to significantly improve power densities and efficiencies of
components to become a significant factor in commercial fleet
Optimum power distribution on aircraft
Reliability
Certification
Will necessitate a total change in aircraft architecture
Opportunities:
Will provide a game changing environment
Fuel Burn/CO2 reduction and a great environmental impact
The US has provided the leadership in commercial
aviation for generations. Let us maintain it!
Thank you for your time!
Dr. M.J. Benzakein Director, Propulsion and Power Center