ED-321 -- Endurance Substantiation of Electric / Hybrid Propulsion Systems

Authority

EUROCAE

Applicability

Endurance substantiation of electric and hybrid propulsion systems, with EASA explicitly referencing ED-321 for EHPS.420 endurance demonstration of electric engines.

Status

Published

Plain-English Explainer

What it is

EUROCAE ED-321 provides guidance for endurance substantiation of Electric/Hybrid Propulsion Systems.

Direct propulsion relevance

This is one of the most directly relevant EUROCAE documents for PropulsionWatch because it addresses how electric propulsion endurance can be substantiated rather than treating electrification only as an equipment-level issue.

EASA relationship

EASA's electric-engine means-of-compliance material states that ED-321 provides methods of compliance for EHPS.420 Endurance Demonstration, while noting that the document's endurance scope is focused on electric engines rather than energy-storage or power-distribution systems.

Primary source: EUROCAE ED-321