KORTHOS / ECOSYSTEM / PRODUCT

Fi4

About

About Fi4

Fi4 combines a rigid carbon-fibre core with a replaceable foam bumper that protects the aircraft during contact and provides flotation. Its forward-biased propeller arrangement lets the drone move through a narrow pipe without pitching sharply, reducing the control difficulty and risk of striking the surrounding surface.

A waterproof gimballed camera captures cracks and defects, while orthogonal imaging supports subsequent measurement. The 2.4-kilogram aircraft is IP55 rated, flies for approximately four minutes and reaches three metres per second. A dedicated smart-controller application displays the pipe environment in real time. ACSL developed Fi4 with NJS for sewer and closed-space inspection.

Capabilities

Source-backed capabilities

  • Capability areas: Autonomous navigation
  • Workflows: Confined-space inspection, Indoor inspection drone
  • Operating environments: Industrial facility
  • Target markets: Infrastructure inspection teams, industrial operators and asset management teams.
  • Deployment model: Commercial product for specialized confined-space inspection workflows.
  • Navigation and obstacle avoidance

    Claimed - ACSL presents Fi4 for flight inspection inside narrow pipes and harsh enclosed infrastructure.

    Source
  • Robotic inspection

    Claimed - ACSL presents Fi4 for flight inspection inside narrow pipes and harsh enclosed infrastructure.

    Source

Context

Market context

Fi4 is ACSL confined-space inspection drone for enclosed infrastructure such as sewers, ducts and narrow pipes, with carbon-fiber core and IP55 protection.

  • Target environment: Confined spaces, sewers, ducts, pipes and other enclosed industrial infrastructure.
  • Workflow context: Confined-space inspection, visual inspection of enclosed assets and safe data capture where human entry is costly or hazardous.
  • Customer context: Infrastructure inspection teams, industrial operators and asset management teams.
  • Deployment model: Commercial product for specialized confined-space inspection workflows.
  • Commercial maturity: Commercially available inspection UAV with dedicated confined-space design.
  • Adoption constraints: Specialized for pipe and duct inspection. Limited general-purpose outdoor utility.
  • Market position: Gives ACSL a specialized infrastructure-inspection product separate from its general outdoor UAV lineup.
  • Adjacent products: Dronut DD1, confined-space inspection UAVs

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