Concept & Objectives

IMOTHEP’s top level goals

  • Achieving a key step in assessing potential benefits of Hybrid Electric Propulsion (HEP) for emissions reductions of commercial aircraft
  • Building the overall European development roadmap for HEP

Specific objectives

  • Identifying HEP architecture & aircraft concepts benefiting from HEP
  • Investigating technologies for HE power train architecture and components at relevant scale and in close connection with propulsion and aircraft architecture
  • Analysing required tools, infrastructures, demonstrations and regulatory adaptations for HEP development
  • Synthesising results through the elaboration of the development roadmap for HEP
Imothep Context & objectives
BWB, turboelectric, DEP, BLI
Credits: ONERA

IMOTHEP's overall approach: Investigating HEP energy system


In close connection with propulsion integration in the vehicle

  • Specifications for power chain components derived from conceptual design of aircraft concepts

At a meaningful scale

  • Representative of technological challenges in the power range of commercial aircraft (3 - 80 MW)

With a major effort on investigating technologies for hybrid electric power train

  • From electric architecture to power electronics

Synthesised through integrated aircraft performance analysis

To identify :

  • Technological gaps and key enablers
  • Architectures and configurations best benefiting from HEP

To issue a roadmap for HEP development

  • Through cross-fertilization with other EU initiatives

IMOTHEP's methodological approach

Three design loops will be implemented using tools with an increasing level of fidelity :  A first one for "conceptual design" (L0) will produce a first design and sizing of the configurations, and an assessment of their performance. Two refined design loops will follow:

  • a "multidisciplinary design" one (L1) using quasi-static integrated optimisation, which will provide an optimised definition of the vehicle and updated targeted specifications for the components;
  • a "refined assessment" (L2), using dynamic simulation and local optimisation of the components
Imothep Context & objectives

Project timeline

Imothep Context & objectives