Electric Aircraft Propulsion Architectures

Team members: Josh Weisburg, Scarlett Koller, Jennifer Pandolf

Technology Roadmap Sections and Deliverables

The unique identifier for this roadmap is:

• 3EAPA - Electric Aircraft Propulsion Architectures

This indicates that we are dealing with a “level 3” roadmap at the subsystem level, where "level 1" would indicate a market level roadmap (airline industry), “level 2” would indicate a product level roadmap (aircraft) and “level 4” would indicate an individual technology roadmap (propulsion subsystem components). We are considering this roadmap of propulsion architectures as "level 3" because it is being developed specifically for commercial aircraft applications (only one relevant "level 2" roadmap).

Roadmap Overview

https://ntrs.nasa.gov/api/citations/20160009274/downloads/20160009274.pdf

Modern aircraft burn hydrocarbon fuels to create thrust, but electric power from renewable sources is an opportunity to reduce operating cost & emissions. Electric propulsion requires extremely dense (by weight) energy storage and motor power, which is not yet sufficient for commercial aircraft travel. To utilize electric power in the meantime, hybrid architectures utilize electric motors either alongside gas turbine engines (Parallel Hybrid), or to apply the power of a gas turbine engine to create thrust (Turbo & Series).

To summarize the 4 key electric propulsion architecture options:

• Turbo-Electric - Uses a gas turbine to generate electricity, which is fed straight into electric based propulsion, without any energy storage.

• Series Hybrid - Uses a gas turbine to generate electricity, which is fed into electric based propulsion through a battery that provides energy storage.

• Parallel Hybrid - Propulsive power is provided by a mix of gas turbine driven fans and electric driven fans, with energy storage. The gas turbine engines power both the fan and the electric motor & battery. The electric motors are used as supplemental power during take off & climb.

• All Electric - No gas turbines are used, the propulsive power is all electric. Batteries provide energy storage and power all of the fans.

Design Structure Matrix (DSM) Allocation

reference existing roadmaps: [2SEA] [2SPA] ] [2EVL ] [3ESB]

https://ntrs.nasa.gov/api/citations/20180004252/downloads/20180004252.pdf

Figures of Merit

Alignment with Company Strategic Drivers

TBD - To be developed

Positioning of Company vs. Competition

TBD

Technical Model

TBD

Financial Model

TBD

Key Publications, Presentations and Patents

TBD

Technology Strategy Statement

TBD