Tech Briefing: Extending the HPDD System Boundary to Long-Endurance Aerospace Propulsion Project Framework: MATLAB Analytical Modeling & Power-Split Optimization Academic Research by: Sam Rodrigues (Aerospace Engineering)

Industry Mentor: Gerd Van Driessche (Founder, Hydro Puls Systems)

The Engineering Challenge

Conventional aerospace propulsion forces a brutal compromise between energy density and system efficiency, heavily constrained by variable load demands across different flight phases. Just as heavy industry suffers from the mechanical losses of the traditional crankshaft, aviation suffers from non-optimal engine loading and massive thermal bleed.

Applying the HPDD Philosophy

This case study expands the HPDD architectural philosophy to a series hybrid flight matrix. By treating power generation and propulsion thrust as completely independent yet coordinated subsystems, the architecture achieves flawless energy flow optimization:

{Thermal Core} {Generator Interface} {Dynamic Battery Buffer} {Electric Motor Propulsion}

Validated Phase-Dependent Orchestration

Through time-discretized power flow computation, the MATLAB model proves that a digitized fluid and power matrix can dynamically adapt to highly volatile mission profiles:

  • High-Power Launch & Climb: A synchronized dual-power mode utilizing the instant power density of the battery pack alongside steady thermal output to maximize thrust-to-weight ratios.
  • Tactical Loiter: An electric-dominant mode that minimizes fuel burn while drastically lowering acoustic and thermal signatures for optimal stealth.
  • High-Intensity Attack Burst: Drawing instantaneous power from the battery buffer to enable rapid maneuvering and peak terminal performance without causing thermal stress or cyclic fatigue on the core engine.

Key Simulation Outcomes

  • Endurance Multiplier: The modeling framework validated a flight window extension exceeding 5+ hours of continuous operation (a 400% increase over pure-electric benchmarks).
  • Steady-State Thermal Efficiency: Proven fuel-consumption reduction by keeping the combustion core strictly locked at its optimal efficiency point, minimizing mechanical losses and variable throttle inefficiencies.

Future Horizon

This validation forms the foundation for mapping out future HPDD aerospace vectors. By combining this series hybrid decoupling with our zero-emission Green Ammonia/Hydrogen fuel cycles and the sub-zero (-25°C) dry airflow capability of the v26 platform, we are actively paving the way toward entirely contrail-free, ultra-long-endurance commercial and tactical aviation.