Deadline: 19-May-2026
The European Commission is inviting applications for a grant to support the development and demonstration of an advanced low NOx hydrogen direct combustion propulsion system for aircraft. The call focuses on cleaner aviation technologies, including a low NOx hydrogen combustor at TRL5 and an efficient hydrogen combustion engine architecture at TRL4, with a total funding allocation of €329.5 million.
What is this grant about?
This funding opportunity supports the development of hydrogen direct combustion propulsion systems for aircraft.
The goal is to advance clean aviation technologies by:
- Reducing NOx emissions
- Improving hydrogen combustion efficiency
- Demonstrating the technical feasibility of hydrogen-powered aircraft propulsion
It is aimed at strengthening hydrogen combustion as a sustainable alternative to conventional aviation fuels.
Focus Areas
The call prioritizes:
- Development and demonstration of a low NOx hydrogen combustor at TRL5
- Achieving at least 30% reduction in NOx emissions
- Ensuring combustor operability and integrity
- Development of an efficient hydrogen combustion engine architecture at TRL4
- Supporting a viable direct hydrogen combustion aircraft concept
Funding Amount
- Total funding available: €329,500,000
This is the total allocation mentioned for the initiative/call.
Project Objective
The project aims to:
- Advance hydrogen-based propulsion systems
- Improve combustion performance
- Lower emissions in aviation
- Demonstrate both the combustor and engine architecture at defined TRLs
- Increase confidence in hydrogen combustion as a future aviation fuel pathway
Who Can Apply?
The opportunity is open to eligible entities worldwide.
Eligible applicants may include:
- Any legal entity, regardless of location
- Organisations from non-associated third countries
- International organisations
- Other eligible natural or legal persons recognised under:
- National law
- EU law
- International law
Entities without legal personality may also participate if they can:
- Exercise rights and obligations
- Meet the relevant call requirements
All applicants must satisfy:
- Horizon Europe Regulation requirements
- Any specific conditions of the call
Why this grant matters
This grant is important because it supports:
- Progress toward low-emission aviation
- Development of hydrogen combustion propulsion
- Reduction of NOx emissions
- Technical validation of future aircraft propulsion systems
- International collaboration in clean aerospace innovation
Tips for Applicants
- Clearly connect your proposal to hydrogen direct combustion aircraft propulsion
- Show how the project will achieve the required TRL4/TRL5 milestones
- Address the 30% NOx reduction target clearly
- Demonstrate robust plans for combustor operability, integrity, and testing
- Align tightly with Horizon Europe participation rules and technical expectations
Common Mistakes to Avoid
- Presenting a general hydrogen project without strong aircraft propulsion relevance
- Failing to clearly explain the NOx reduction pathway
- Weak demonstration strategy for TRL4/TRL5
- Ignoring engine architecture integration
- Overlooking specific call compliance requirements
Frequently Asked Questions (FAQs)
1. What is the main aim of this grant?
To support the development and demonstration of an advanced low NOx hydrogen direct combustion propulsion system for aircraft.
2. What emission target is mentioned?
The project should aim for at least a 30% reduction in NOx emissions.
3. What TRL levels are required?
- Low NOx hydrogen combustor: TRL5
- Hydrogen combustion engine architecture: TRL4
4. How much funding is available?
The total funding allocation mentioned is €329,500,000.
5. Who can apply?
A wide range of global applicants, including:
- Legal entities worldwide
- Non-associated third country organisations
- International organisations
- Other eligible persons/entities under Horizon Europe rules
6. Is the call open only to EU organisations?
No. It is described as open to eligible entities regardless of geographical location, subject to Horizon Europe and call-specific conditions.
Conclusion
This European Commission funding opportunity is a major call for organisations working on hydrogen aviation propulsion. By supporting low NOx combustor development, engine architecture demonstration, and measurable emission reductions, it plays an important role in advancing cleaner, more sustainable aircraft technologies.
For more information, visit European Commission.
