Definition: An axiom is a statement that everyone believes is true, such as "supply equals demand" or "the only constant is change." Mathematicians use axiom to refer to established proofs.
In 2009 Neva Aerospace co-founder and Chief Science Officer Prf. Brotherton-Ratcliffe defined the axioms of 3D Distributed Thrust for Aeronautic Levitation and Propulsion. They formed the basis of the original patent for Neva Aerospace technology, and their definition was the starting gun for a new era of aeronautical design.
We do not believe they can be challenged, or that any solution that does not adhere to them will be safe, scalable, viable or able to satisfy regulators.
The Brotherton-Ratcliffe Axioms:
- The reactivity of turbine thrust systems depends on the inner mechanical momentum of the turbine and consequently an efficient Levitation system requires:
- a plurality of high-average-power high-static-thrust low-modulation-frequency thrust systems to compensate for most of the gravity, and
- a plurality of low-average-power high-modulation-frequency thrust systems to compensate for force transients.
- Thrust systems should be dispersed around the vehicle on a surface whose normal is the gravity axis in order to create a levitating support thrust which is more-or-less evenly distributed over said surface, thus reducing thrust density and conferring a fundamental redundancy of operation among the plurality of thrust systems.
- In order to confer 3D flight stability, a subset of the thrust systems described above should be replaced with intrinsically 3D thrust systems, said systems being capable of thrust in additionally two mutually orthogonal directions to the gravity axis.
- For high-speed efficient linear flight, an aerofoil should be incorporated in the design and high dynamic thrust turbines used for linear propulsion.
Our patented "3D Distributed Propulsion" technology is still the only viable available solution for flying, hovering and transition from VTOL to linear flight, with useful payloads.
Other than our axioms for 3D Distributed Propulsion and standard helicopter and airplane designs, we believe there is no real scalability. It comes down to physics and aerodynamics.
See the original Patent: Electric VTOL Aircraft using Electric Ducted Fans.