HPDD for Aviation: Redefining Aerospace Propulsion

Lighter. More Efficient. Uncompromisingly Safe.

In the aerospace industry, the transition to zero-emission flight is hindered by the energy density of hydrogen and the weight of current propulsion systems. The Hydro Puls Direct-Drive (HPDD) breaks these barriers, offering a high-altitude power plant that combines extreme weight reduction with unprecedented thermodynamic efficiency.

Engineering the Future of Flight:

1. Revolutionary Weight Reduction (65% Less Mass)

In aviation, every gram counts. By moving toward a 1,000-bar hydraulic roadmap and eliminating heavy crankshafts and complex gearboxes, we reduce the total drivetrain mass by 65%. This dramatic weight saving translates directly into increased lift capacity, higher payload, and extended flight range.

2. 62% Net Efficiency at High Altitudes

Traditional turbines lose significant efficiency in thin, high-altitude air. The HPDD maintains its performance through its constant 230°C Monolith architecture and high-precision plasma ignition. By extracting 62% LHV efficiency, you can reduce the volume of hydrogen fuel required for the same distance, further optimizing the aircraft's weight-to-power ratio.

3. Frictionless Reliability (Nitrogen Air-Bearing)

Mechanical wear is the leading driver of aircraft maintenance costs. In the HPDD, the piston floats on a 620-bar nitrogen shield. This frictionless air-bearing technology means zero metal-to-metal contact, minimal heat buildup, and no need for heavy oil-lubrication systems. The result is an unprecedented TBO (Time Between Overhauls), drastically reducing operational costs.

4. Hermetic Safety (Inconel Bellows)

At 30,000 feet, safety is non-negotiable. Our patented Inconel bellows guarantee a 100% leak-proof separation between the combustion chamber and the rest of the aircraft. This hermetic seal ensures zero gas leakage into the nacelle, eliminating fire risks and providing the highest level of structural integrity in zero-emission propulsion.

Aerospace Technical Specifications:

• Propulsion: Modular HPDD Transductor Swarm

• Weight Advantage: -65% compared to conventional turboprops/ICE

• Efficiency: 62% LHV at cruise altitude

• Maintenance: Frictionless Nitrogen Shield (Oil-free)

• Safety: Zero-leakage Inconel Bellows Architecture

"The HPDD v26 isn't just a new engine; it’s the escape route from the weight-penalty of the green transition in aviation."

Is your aerospace project ready for a 65% weight reduction? Explore the thermodynamics of high-altitude HPDD flight.

• Request Technical Whitepaper V26

• Contact our Aerospace Engineering Division

• Page: Aviation

The Android Model for Aerospace: Open Engineering, Powered by HPDD

The climate challenge is too immense for a single patent to solve in isolation. That is why HPDD is adopting the "Android Model" for the future of aviation. We are opening our designs for Distributed Active Intake (BLI) and Hydraulic Traction to the global engineering community.

We provide the "Core Processor"—our patented 600-bar HPDD modules—and invite engineers worldwide to design and build the most efficient airframes and propulsion systems around them.

Design freely. Fly efficiently. Powered by HPDD.

Why an Open Architecture?

• Accelerated Innovation: By sharing our blueprints for Boundary Layer Ingestion (BLI) and hydraulic power distribution, we allow OEMs and startups to skip years of R&D and focus on airframe optimization.

• The HPDD Core as a Standard: Just as Android powers diverse hardware, our HPDD modules serve as the universal high-pressure heart for a new generation of hydrogen-electric aircraft.

• Global Scalability: We provide the propulsion technology; you provide the application. From urban air mobility (UAM) to regional freight, the HPDD core adapts to your mission.

"We don't just want to build a better engine; we want to provide the foundation for an entirely new era of sustainable flight."

Join the Ecosystem

Are you an aerospace engineer or an OEM ready to integrate 62% efficiency into your next airframe? Access our open-source integration guides and start building on the HPDD backbone.

• Access Open-Source Design Specs

• Partner with the HPDD Ecosystem

HPDD for Cranes and Heavy Machinery: The 'Escape Route' to Zero-Emission Power

In the world of cranes, excavators, and heavy-duty machinery, downtime is the ultimate cost. The current transition to zero-emission powertrains forces the industry to choose between heavy, limiting battery packs or complex hydrogen engines with low efficiency.

The Hydro Puls Direct-Drive (HPDD) offers the 'Escape Route': a modular platform that combines the raw power of hydraulics with the precision of a high-frequency energy transductor.

Why the HPDD Redefines the Future of Mechanical Engineering:

• 'Swarm' Architecture (0% Unplanned Downtime) Instead of a single central engine, the HPDD utilizes a modular network of transductors. If one module requires service, the rest of the swarm absorbs the load. Your machine keeps working; the job gets done. This is the '5 NINES' reliability (99.999%) the industry has been waiting for.

• 62% Efficiency – Direct Pressure The HPDD converts energy directly into fluid pressure up to 600 bar. No mechanical losses from crankshafts or complex transmissions. With a thermal efficiency of 62% LHV, you effectively double the operational range of hydrogen compared to traditional systems.

• Thermal Mastery at 230°C By utilizing the synchronized thermal expansion of Inconel-718 components (expanding exactly 109 µm at 230°C), the system operates frictionlessly on a 5-micron gas bearing gap. The result? A machine virtually immune to wear, with exhaust temperatures remaining consistently below 60°C.

• Compact and Lightweight Increase your payload. HPDD modules are a fraction of the weight of traditional diesel engines or battery packs, leaving more room and weight capacity for the actual task: lifting, digging, and moving.

From Challenge to Licensing

We are not just building technology; we are building an ecosystem. Through a strategic licensing model, we offer manufacturers the opportunity to integrate the HPDD standard into their own niche—from refuse compactors to massive harbor cranes.

The HPDD technology is currently undergoing independent academic validation at KU Leuven.

"We don’t just supply an engine; we guarantee an uninterrupted process."

Ready for the Transition?

Are you a manufacturer or fleet manager looking to step into a zero-emission future without sacrificing power?

Explore the impact of the HPDD on your business case:

• Request Technical Whitepaper V26

• Access the Secure Data Room

HPDD for Maritime & Shipping: Navigating the Zero-Emission Frontier

The maritime sector faces a monumental challenge: transitioning to zero-emission fuels like hydrogen without compromising safety, reliability, or operational range. The Hydro Puls Direct-Drive (HPDD) is the technological breakthrough that makes this transition profitable.

The New Standard for Maritime Propulsion:

1. The ‘Get Home’ Concept (Unparalleled Redundancy)

A failure in a traditional marine engine can leave a vessel dead in the water. The HPDD operates with a 'Swarm' of independent modules. Even if multiple units fail, propulsion remains guaranteed. This modular architecture offers a level of safety and operational continuity previously unattainable in the shipping industry.

2. 62% LHV Efficiency – More Miles per Kg of $H_2$

Fuel storage is the primary constraint for any vessel. With a thermal efficiency of 62%, the HPDD extracts significantly more energy from every kilogram of hydrogen than traditional turbines or internal combustion engines. This translates directly into a greater operational range and reduced fuel tank volume.

3. Cold Exhaust, Safe Decks

In the confined spaces of a ship, heat management is critical. Thanks to our Closed Thermal Cascade, the exhaust gas temperature of the HPDD remains consistently below 60°C. This eliminates fire hazards, reduces the need for heavy insulation, and protects the integrity of surrounding onboard systems.

4. Frictionless Precision at 230°C

Salt and mechanical wear are the enemies of maritime engineering. The HPDD operates entirely frictionlessly on a 5-micron gas bearing gap, enabled by the synchronized thermal expansion of Inconel-718 (expanding exactly 109 µm at 230°C). The result is a low-maintenance system built to withstand the harshest maritime conditions.

Scalable from Inland Waterways to Short-Sea Shipping

The HPDD is not a ‘one-size-fits-all’ solution; it is a scalable platform. Through our licensing model, we enable shipyards and engine manufacturers to integrate the HPDD standard into their own designs—from autonomous ferries to heavy coastal cargo vessels.

The HPDD technology is currently undergoing independent academic validation at KU Leuven.

"We don’t just transform hydrogen into motion; we transform the safety and profitability of the global fleet."

Ready for Emission-Free Sailing?

Are you a shipowner or engineer looking to discover the future of maritime propulsion?

• Request Technical Whitepaper V26

• Access the Secure Data Room

HPDD for Rail & Locomotives: Powering the Future of the Tracks

The decarbonization of the rail sector—especially for non-electrified lines and heavy freight—requires more than just an alternative fuel. It demands a fundamental improvement in energy conversion. The Hydro Puls Direct-Drive (HPDD) provides the most powerful and efficient solution for the next generation of hydrogen-powered trains.

The Revolution in Railway Traction:

1. Unrivaled Torque from a Standstill

Trains require maximum power the moment they depart. The HPDD transductor delivers constant, high torque through direct fluid pressure. This enables heavy freight wagons to move effortlessly from a dead stop and climb steep gradients without the energy losses associated with traditional mechanical transmissions.

2. 62% Efficiency – Compact Energy Storage

The biggest challenge for hydrogen trains is fuel storage space. Thanks to a thermal efficiency of 62% LHV, the HPDD extracts significantly more kilometers from every kilogram of hydrogen. This results in fewer refueling stops and more space for cargo or passengers, all without exceeding axle load limits with heavy battery packs.

3. The ‘Swarm’ for Maximum Availability

A stalled locomotive can block an entire network. The HPDD utilizes a modular 'Swarm' architecture. Should a module require maintenance, the remaining units absorb the load. Your train always reaches its destination, elevating operational reliability to a '5 NINES' standard (99.999%).

4. Thermal Stability and Infrastructure Safety

The HPDD operates with a stable core temperature of 230°C, yet maintains exhaust gas temperatures consistently below 60°C. This minimizes heat radiation toward infrastructure (such as tunnels and stations) and enhances the overall safety of the onboard hydrogen system.

Scalable from Shunting Locomotives to Intercity Rail

The modularity of the HPDD makes the system suitable for the entire spectrum of rail transport. Through our licensing model, we offer manufacturers the opportunity to integrate this Belgian standard into both new designs and the re-powering (retrofitting) of existing fleets.

The HPDD technology is currently undergoing independent academic validation at KU Leuven.

"We drive the heaviest loads with the highest efficiency, without straining the tracks."

Ready to Decarbonize the Rail?

Are you a rail operator or manufacturer looking to calculate the impact of the HPDD on your fleet?

• Request Technical Whitepaper V26

• Access the Secure Data Room