Hydrogen-Combustion Passenger Aircraft

Mid–Long Range Aircraft Family

Built around hydrogen-combustion turbofans (no cryogenics) using compressed gaseous H₂ (350–700 bar). Modular tanks, cert-aligned systems, and airport-ready ops for multi-country routes.

Engines first. Aircraft next. We scale cabin and range while reusing the core engine, controls, and H₂ delivery.

Family Overview

Mid-Range (MR-H₂)

Single-aisle, 120–180 pax studies; 1,200–1,800 km class with modular tank count and CG-managed placement.

Long-Range (LR-H₂)

High-capacity concepts targeting 2,000–3,200 km class; extended tanks + optimized drag & structure.

Retrofit Lanes

Engine + tank kits where structure/CG permit; certification from day one with authority-specific paths.

  • Common engine core, delivery, and controls across sizes.
  • Airport-pragmatic turnarounds and maintenance flows.
  • Exportable evidence packs for multi-authority certification.
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System Architecture

  1. Storage & Delivery: Type-IV tanks (350–700 bar), staged regulation, PRD, ventilation, and leak detection feeding the engine.
  2. Combustion: Lean-premix/micromix modules tuned for ultra-low NOx with mapped flashback and stability margins.
  3. Controls & Integration: Metering, ignition, throttle transients, and engine–airframe trades for CG & maintainability.
  4. Evidence Pipeline: Tests → NOx/stability maps → HAZOP/FMEA → means-of-compliance per authority.
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Modules reuse across aircraft sizes; tank count/placement and structure scale with mission.

Performance & Missions

Early configurations target mid–long range passenger routes with airport-pragmatic fueling, purge, and detection. We trade tank count, placement, and aero to balance payload and range.

Design Range (MR-H₂)
1,200–1,800 km class (initial targets)
Design Range (LR-H₂)
2,000–3,200 km class (trade dependent)
Cabin Studies
120–180 pax single-aisle; aisle width & dwell-time targets
Turnarounds
< 25 min target with refuel, purge, and checks

Representative Missions

Representative Missions

  • • Mid-range: 1.5–3 hr sectors; hub– spoke and point-to-point
  • • Long-range: 3–4.5 hr sectors with optimized aero and tank layouts
  • • Cross-border: multi-authority ops with exportable evidence packs
  • • Retrofit: platform-specific where structure and CG permit

Cabin & Ops

Passenger experience and operations designed together—fast turnarounds, maintainable systems, and clear safety communication from cockpit to cabin.

Cabin Layout
120–180 pax single-aisle; optimized aisle width and dwell-time for efficient flow
Accessibility
Wide doors and low sill height for fast boarding and deplaning via jet bridge
Maintenance
Line-replaceable components, streamlined inspection access, and minimal ground-time procedures
Safety Signaling
Clearly marked vent paths, annunciations, and standardized crew interfaces across variants

R&D Sequence

  • M1: Single-sector cold-flow + ignition; characterize flashback margins.
  • M2: Pressurized single-sector hot-fire; initial NOx & stability maps.
  • M3: Core-engine H₂ ground-run plan; integration & safety reviews (DOA/ODA partners).
  • M4: Multi-authority cert mapping; airport pilots across 2–3 countries.

Test Assets

  • • Pressurized single-sector rig with optical access
  • • NOx analyzers, high-speed sensing, DAQ & logging
  • • Safety interlocks, purge, ventilation, leak detection
  • • Automated report generation & traceability

Liberia, Costa Rica (LIR) — Built for Velocity

Cooperative authorities, repeatable weather, and H₂ access compress cycles from design to data—de-risking aircraft choices sooner.

  • Coordinated airport & regulatory support for fast turnarounds
  • Ground-ops playbooks aligned with PRD/ventilation/detection
  • Global partners welcomed with exportable evidence packs

Partner With Us

We co-develop modules and share test data to accelerate certification-ready products.

Combustor Modules
Micromix variants, injectors, liners, optical rigs.
Storage & Delivery
Type-IV tanks, PRD, manifolds, ventilation & detection.
Controls & SW
Transient handling, analytics, advisory AI pipelines.
Airport Pilots
Turnaround playbooks, fueling bays, maintenance flows.

FAQs

Why gaseous H₂ vs. liquid?
Faster iteration without cryogenics for near-term ops. 350–700 bar with validated PRD/ventilation.
What passenger sizes first?
120–180 pax single-aisle studies for mid–long range.
How will you manage CG with tanks?
Modular placement and structure trades; procedures maintain safe CG envelopes.
Retrofit feasibility?
Where structure and CG allow; authority-mapped certification from the start.
Where is testing happening?
Liberia (LIR), Costa Rica—rapid cycles and cooperative authorities.
How do you handle software safety?
DO-178C for safety-critical SW. Advisory analytics are isolated from the safety path.