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Hydrogen powered aircraft concepts and key technologies integration

Suitable for SMEs developing hydrogen propulsion or integration solutions.

Deadline 19 May 2026

Expected Outcome:Integration and performance assessment of the fully electric hydrogen fuel cell powered aircraft and the direct hydrogen combustion propulsion aircraft concepts introduced in the CAJU SRIA. The topic covers the integration and co-ordination of CAJU key technology projects into a comprehensive aircraft concept at TRL4, demonstrating the viability of the aircraft concept and delivering a performance, emissions and maturity assessment. See the topic description document published with this call for full details,

The U.S. Embassy Windhoek announces an open competition for past participants (“alumni”) of U.S. government-funded and U.S. government-sponsored exchange programs to submit applications to the 2026 Alumni Engagement Innovation Fund (AEIF 2026). This annual fun...

Fit depends on applicant details and official eligibility rules.

Check deadline on the official source.

The U.S. Embassy Windhoek announces an open competition for past participants (“alumni”) of U.S. government-funded and U.S. government-sponsored exchange programs to submit applications to the 2026 Alumni Engagement Innovation Fund (AEIF 2026). This annual funding opportunity is designed to amplify the U.S. government’s return on investment in exchange programs, advance policy goals, and strengthen the U.S. government’s relationship with exchange alumni. All 2026 AEIF projects must celebrate and promote the 250th anniversary of American independence in coordination with the U.S. Embassy in Namibia’s Freedom 250 campaign. We seek proposals from teams of at least two alumni that meet all program eligibility requirements below. Exchange alumni interested in participating in AEIF 2026 should submit proposals to WindhoekPublicDiplomacy@state.gov by May 20, 2026.  

The Embassy of the United States in Jordan announces an open competition for alumni of U.S. government-funded and U.S. government-sponsored exchange programs to submit applications to the 2026 Alumni Engagement Innovation Fund (AEIF 2026). We welcome proposals...

Fit depends on applicant details and official eligibility rules.

Check deadline on the official source.

The Embassy of the United States in Jordan announces an open competition for alumni of U.S. government-funded and U.S. government-sponsored exchange programs to submit applications to the 2026 Alumni Engagement Innovation Fund (AEIF 2026). We welcome proposals from teams consisting of at least two alumni that meet all program eligibility requirements below, with one team member designated as the lead applicant. Exchange alumni interested in participating in AEIF 2026 should submit proposals to (JordanAlumni@state.gov) by May 19, 2026 / 5:00 p.m. (Amman time). Applications submitted via Grants.gov are not eligible. Applications must be submitted via email to JordanAlumni@state.gov only.

The Syria Regional Platform (SRP) in cooperation with the Bureau of Educational and Cultural Affairs (ECA) announces an open competition for all U.S. government exchange program alumni to submit proposals and compete for the 2026 Alumni Engagement Innovation F...

Fit depends on applicant details and official eligibility rules.

Check deadline on the official source.

The Syria Regional Platform (SRP) in cooperation with the Bureau of Educational and Cultural Affairs (ECA) announces an open competition for all U.S. government exchange program alumni to submit proposals and compete for the 2026 Alumni Engagement Innovation Fund (AEIF 2026) for an award between U.S. $5,000 - $35,000 to develop and implement projects that support U.S. policy objectives and promote shared interests.

Advanced noise‑reducing technologies for propulsion systems of next generation Ultra‑efficient SMR aircraft

Ideal for SMEs working on fan, intake, or aero‑acoustic noise reduction.

Deadline 19 May 2026

Expected Outcome:Development and demonstration of advanced noise-reducing and lightweight technologies for UHBR propulsion systems on the Ultra-Efficient SMR aircraft concept. The topic aims to mature distortion-tolerant fan and intake solutions supported by improved and validated aero-acoustic modelling to TRL5 with an aim to achieve cumulative noise reduction and structural weight benefits. See the topic description document published with this call for full details.

Ground Demonstration of Hybrid‑Electric Propulsion Architectures for the Ultra‑efficient SMR aircraft

Targeted at SMEs developing hybrid‑electric propulsion subsystems.

Deadline 19 May 2026

Expected Outcome:Development and demonstration of hybrid-electric propulsion architectures for the Ultra-Efficient SMR aircraft. This topic covers the demonstration of hybrid-electric sub-systems integrated into ducted or unducted engines at TRL5 through ground demonstrations with an aim to demonstrate the benefits from such propulsion architectures targeting at least 5% CO2 emissions reduction at aircraft level, with a clear roadmap towards TRL6 by 2030 supporting a future product launch compatible with an EIS by 2035. See the topic description document published with this call for full details.

Demonstration of Advanced Low NOx H2C Propulsion System for a direct hydrogen combustion aircraft

For SMEs focusing on low‑NOx hydrogen combustors and engine architectures.

Deadline 19 May 2026

Expected Outcome:Development and demonstration of an advanced low NOx hydrogen direct combustion propulsion system. This topic targets the demonstration of a low NOx combustor at TRL5, delivering minimum 30% reduction of NOx and demonstrating the combustor operability and integrity, and an efficient and hydrogen combustion engine architecture at TRL4, enabling the demonstration of a viable direct hydrogen combustion aircraft concept. See the topic description document published with this call for full details.

Demonstration of a hydrogen distribution system for a direct hydrogen combustion propulsion aircraft

Relevant for SMEs developing hydrogen distribution and conditioning components.

Deadline 19 May 2026

Expected Outcome:Development and demonstration of the hydrogen distribution and conditioning system, from the tank interface until the combustor, for a direct hydrogen combustion propulsion aircraft. This topic targets the demonstration of the critical distribution and hydrogen conditioning components, including the high-pressure hydrogen pump, at TRL5, and the on-ground demonstration of the fuel distribution system at TRL4. The project will perform a scaled-on ground demonstration of the engine thrust control function. See the topic description document published with this call for full details.

Innovative light weight and reliable liquid hydrogen tank

Suitable for SMEs working on hydrogen storage solutions for aircraft.

Deadline 19 May 2026

Expected Outcome:Develop and demonstrate an innovative lightweight and reliable liquid hydrogen tank concept, for integration into hydrogen powered aircraft concepts. The topic aims to demonstrate a reliable and safe hydrogen tank design at TRL4, with a gravimetric index no less than 40% a dormancy no less than 12 hours, demonstrated through on ground cryogenic and tightness testing. See the topic description document published with this call for full details.

Demonstration of low power Ice Protection System technology

Ideal for SMEs developing lightweight ice protection for regional aircraft.

Deadline 19 May 2026

Expected Outcome:Development and demonstration of a low power Ice Protection System for the wing and empennage of an Ultra-Efficient Regional Aircraft concept based on hybrid-electric propulsion. The topic covers ground demonstrations to TRL5 representative of EASA CS-25 icing conditions and targets a lightweight and low drag solution compatible with regional aircraft non-propulsive power levels. See the topic description document published with this call for full details.