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

Audience

Inspectors

Workflow

Confined-space inspection, visual inspection of enclosed assets and safe data capture where human entry is costly or hazardous.

Deployment environment

Confined spaces, sewers, ducts, pipes and other enclosed industrial infrastructure.

Specifications

Ingress Protection: IP55
Core Material: Carbon fiber
Bumper: replaceable foam; flotation
Propeller Layout: forward-biased layout for pipe-like spaces
Controller: Smart controller with dedicated app, real-time pipe condition display
Applications: Sewer and duct survey, pipe navigation, GPS-denied inspection, confined-space survey
Flight Time Minutes: About 4 minutes maximum flight time
Speed Range: 3 m/s maximum flight speed
Dimensions: 610 mm length, 290 mm width, 145 mm body height, 220 mm camera-side height
Aircraft Weight: 2.4 kg including survey camera and battery

Comparable Systems

Dronut DD1 - Cleo Robotics - UAV
Skydio R10 - Skydio - UAV
Skydio X10 - Skydio - UAV
Skydio X10D - Skydio - UAV
XTENDER - XTEND - Reconnaissance UAV

Fi4 Context