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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
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Are Electric Propulsion Systems Coming to
Commercial Aircraft?
• History
• Why?
• Potential Architectures
• Challenges and Opportunities
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The History
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Efficiency Trends with Core and Propulsor Improvements
Propulsion system improvements require advances in both propulsor and
core technologies
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Variation in Core Power with Turbine Inlet Temperature
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Potential Electric Propulsion
Architecture
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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
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Motor Related Technologies and Power Electronics
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Technology Benefits after 15 years (2027)
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Technology Benefits after 30 years (2042)
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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!
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Thank you for your time!
Dr. M.J. Benzakein Director, Propulsion and Power Center