SUPER EGG AEROPLANE (NET ZE... (NET-ZERO)

The proposed concept describes a high-speed hydrogen-fueled aircraft or transport vessel incorporating delta wing hyperbolic geometry, a "Mega Hex" 6-rotor engine, and a 3-6-9 harmonic energy sequence. Building this system requires treating the combustion chamber as a resonant cavity, where hydrogen combustion is structured to operate as a continuous standing wave rather than discrete explosions.
YouTube
YouTube
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Building the Resonant Cavity (Combustion Chamber)
"Acorn" Harmonic Seals & Floating Cushion: To handle 15,000+ RPM and eliminate friction, the sealing mechanism (Acorn) operates on a "high-pressure harmonic cushion," allowing the rotors to float without physical contact, similar to magnetic bearing technology but driven by combustion pressure harmonics.
Resonant Scavenging: The 3-6-9 sequence is used to tune the intake/exhaust manifold lengths to match the volume-frequency ratio. This creates a high-pressure "vacuum pull" (Scavenging), where the outgoing exhaust gases create a low-pressure zone that sucks in the next hydrogen charge at supersonic speeds, acting as a "virtual" turbocharger.
E8 Symmetry & 6-Rotor Mapping: The engine uses six rotors (M6 symmetry) arranged in a hexagon to map to an E8 manifold. This geometry distributes the combustion energy, reducing the shock loads and "dead spots" typical of traditional rotaries.
MDPI
MDPI
+2
Damping the Mega Hex Vibration
At 15,000+ RPM, the structure risks reaching its Brittle Transition Temperature. The damping solution requires an integrated approach.
Recommendation: Active Piezoelectric Damping. While liquid-sodium cooling provides high thermal capacity, active piezoelectric damping is superior for suppressing high-frequency vibrations in lightweight structures. Piezoelectric stack actuators (PESAs) acting as both sensors and actuators can create an active feedback loop to neutralize harmonic vibrations.
Composite Damping: For optimal performance, a hybrid approach combining passive damping with active piezoelectric control is advised to reduce the energy demand on the piezo elements.
ResearchGate
ResearchGate
+2
Geometry & Aerodynamics
V-Front Nose/72.14° Swept Back: This angle is consistent with high-supersonic flow designs (approx. 70°+), minimizing drag and establishing strong leading-edge vortices for lift.
45° Angled Down Back M-Diffuser: This directs the trailing-edge vortex interaction to maximize stability, likely designed for high-efficiency subsonic cruise or improved landing characteristics, despite being a low angle for pure supersonic optimization.
Super Egg Shaped Planform: This, in combination with the delta geometry, manages the vortex breakdown position, promoting a smoother lift-to-drag ratio across a wide speed range.
Capacity: 70–350 Passengers.
Cranfield University
Cranfield University
+1
Performance & Energy Efficiency
Net Zero Operation: By combining 45%+ thermal efficiency from the 6-rotor hydrogen engine with carbon credit offsets (from hydrogen production), the system operates at a "Net Zero" cost.
Hydrogen Fuel: The engine operates on gaseous hydrogen (similar to Mazda's hydrogen RENESIS), requiring high-pressure injection.

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