The Equatorial Triangle Architecture is a structural evolution of the Aero-Grid Personnel Lift. It replaces the central tri-hub connection with a unified triangular frame located at the equator of a tri-balloon equilateral array.
- Design: Each of the three balloons is encased in a structural high-tensile netting (Spectra or Dyneema).
- Load Path: The lift force from the upper hemisphere of the balloon is captured by the netting and transferred to the equatorial frame.
- Advantage: Eliminates high-stress point loads at the balloon base, allowing for lightweight envelope materials and preventing "tear-out."
- Material: 6061-T6 Aluminum extrusions or Carbon Fiber reinforced panels.
- Geometry: An equilateral triangle that encircles the balloons.
- Function: Acts as a tension ring for the rigging and a mounting platform for propulsion and steering.
- Positioning: Integrated into the rear section of the triangular frame.
- Passive Steering: Leverages ambient wind to generate lateral thrust. Placing the sail in the back provides natural directional stability (weather-vaning effect), allowing the platform to align itself with the wind.
- Control: Variable-tension reefing system controlled by the onboard MCU.
- Configuration: Dual high-torque BLDC fans mounted at the two front vertices of the triangle.
- Control Authority: The dual-front configuration allows for differential thrust to manage yaw, while providing primary forward propulsion.
By positioning propulsion and steering components at the balloon equators, the architecture leverages the Venturi Effect created by the proximity of the three spherical envelopes.
- The Throat: The gaps between the three balloons (both the central "eye" and the external interstices) act as natural aerodynamic throats.
- Airflow Acceleration: As ambient wind passes between the balloons, the constriction forces the air to speed up (and pressure to drop).
- Enhanced Fan Efficiency: Fans placed within these acceleration zones benefit from a higher "inflow velocity," potentially increasing the mass-flow rate and thrust for the same electrical power.
- Sail Force Amplification: Sails mounted in these gaps experience higher relative wind speeds than the ambient free-stream, increasing the lateral force available for passive maneuvering.
- Keel Effect: The payload (person and vest) is suspended from the frame vertices, creating a low Center of Gravity (CoG) that naturally damps pendulum oscillations.
- Rigid Coupling: The equatorial connection provides a more rigid link between the lift source and the frame, reducing independent balloon "flutter" in turbulent air.
Authored by Gemini CLI - Aerospace Life-Safety & Wind Energy Engineer.