Multirotor Configuration for Building Facade Inspection

Overview

• Establish the exclusion zone on the ground first; usable standoff is what remains, not what the airframe can do.
• Vertical surfaces need a different gimbal angle strategy than horizontal assets — plan for side-looking passes.
• Wind accelerates around tall buildings. Treat the local wind at facade height as unknown until measured on site.
• For defect records, fix a reference grid on the elevation drawing and report against it.

The constraint is position, not coverage

Facade work is the opposite of area survey. What matters is holding a position long enough to capture an image someone can judge — a crack, a spalled patch, a failed sealant joint — at a stand-off distance that keeps both the detail and the aircraft safe. Coverage rate is nearly irrelevant; hover stability and optics decide everything.

That points to a compact airframe with sub-metre position holding rather than a larger one with more endurance. The sorties are short, repeated and close to structures, so transit time and site preparation matter more than time on station.

Wind and urban environment

Buildings change the wind. Airflow accelerates around corners, and the leeward side can be calm while the windward side is not. A facade survey that assumes open-field wind behaviour will produce inconsistent image quality between faces, and the inconsistency is usually read as a change in the building rather than a change in conditions.

Plan per face rather than per building: note the wind direction relative to each face, decide whether that face is flyable on the day, and record the decision. This is also why hover accuracy figures should be treated as conditional — see M-10, where we state the figure with its dependence on payload, wind and positioning conditions.

Getting from images to a record

A facade survey that produces an unordered image set is not a survey. Each frame needs to be tied to a location on the building — which face, which grid reference or floor band — so that the next inspection can compare the same point. Without that, the programme cannot show change over time and will be re-commissioned from scratch every few years.

Fix the capture geometry: stand-off distance, angle to the surface, overlap, and the lighting direction where it is controllable. Then hold it. Consistency between epochs is what turns a set of photographs into a condition record.

What to state in the requirement

State which faces, at what stand-off, at what resolution, and how findings will be located. State the wind limit at which work stops. State whether confined or indoor areas are included — those need a different platform entirely, and G-100 is the answer more often than a smaller aircraft is.

State the deliverable as a located record, not as a flight. If acceptance is written as hours flown, you will get hours flown.

Related pages

• M-30 heavy-payload long-endurance multirotorView
• M-15 with thermal imaging optionView
• M-10 compact inspection platformView
• Intelligent Payloads and AccessoriesView

More in this area

• How to Choose an Industrial Multirotor PlatformRead
• Multirotor Configuration for Power Facility InspectionRead
• Multirotor Configuration for Solar PV InspectionRead
• Multirotor Configuration for Building Facade InspectionThis page
• Multirotor Configuration for Bridge InspectionRead
• Thermal Imaging Payload Configuration for InspectionRead
• Emergency Lighting and Speaker Payload ConfigurationRead
• Multi-Payload Platform ConfigurationRead
• Endurance and Payload Trade-offs for MultirotorsRead
• Multirotor Customization Requirement ChecklistRead