Why You Do Not Always Need a Window-Cleaning Payload

A hose-fed cleaning drone divides the system into two jobs. The ground rig produces water quality, pressure, flow, and compatible cleaning solution. The aircraft places the hose and nozzle at height.

Apellix says the B2 works with standard industry nozzles, hoses, and pumps and can spray water, soap, detergent, bleach, and other cleaning solutions. Its current product page lists windows as a standard application and lists a soft-wash hose with the system. It does not list a separate window payload among the optional add-ons.

That means window capability is included in the standard B2 method. It does not mean every pane or deposit is spray-only work. Hard-water staining, paint, sealant, restoration defects, and some coatings can still require agitation or another method.

Lucid describes Sherpa window cleaning as an optional payload attachment. Its onboard tank and variable-ratio mixer let the pilot switch between cleaning solution and deionized water while the aircraft stays aloft.

That can be useful when a job benefits from remote wash-and-rinse switching and the ground water line must remain dedicated to purified water. It is an operating option, not proof that every window-cleaning drone needs onboard chemistry.

Professional pure-water systems use reverse osmosis and deionization to remove dissolved minerals before the water reaches the glass. When the surface and soil are suitable, mineral-free water can rinse and dry without the spotting caused by ordinary hard water.

That production equipment can remain on the ground. The aircraft does not need to carry a purification plant. It needs a compatible, controlled way to deliver the selected medium to the surface.

Lucid's published specification lists the standard spraying configuration at 37.2 pounds with batteries and the window configuration at 38.6 pounds with batteries. The window configuration is 1.4 pounds, or approximately 4%, heavier before the changing weight of liquid and hose is considered.

Keeping chemistry and water treatment on the ground does not make the hose weightless. It avoids placing another dedicated tank and mixing assembly on the aircraft when the job does not require them. That preserves more of the aircraft's operating margin for the hose and fluid that must actually be supported in flight.

Use a separate onboard payload when its switching and mixing functions materially improve the exact workflow. Use a ground-fed method when purified water or compatible ground-applied chemistry can produce the required finish while keeping the aircraft simpler and lighter.

SkyPSI starts with the glass, frames, seals, water quality, contamination, runoff, wind, hose route, and required finish. The question is not whether the drone has a window-branded accessory. The question is whether the complete method can safely deliver the result.