Design and capabilities
Hornet is a fixed-wing, electric-motor-powered one-way strike drone built by the American company Perennial Autonomy, founded by former Google chief executive Eric Schmidt out of his earlier White Stork and Swift Beat drone ventures. Reported specifications are open-source estimates rather than official figures, and include a wingspan of roughly two metres, a four-to-five-kilogram warhead, and a cruise speed near 100 to 120 km/h. Powered range is approximately 150 to 200 kilometres under its own motor. Estimated unit cost runs $5,000 to $12,000.
Navigation reportedly relies primarily on a downward-facing camera tracking terrain movement rather than on satellite positioning - an approach said to make the drone comparatively resistant to the GPS jamming and spoofing that have diverted other systems into NATO airspace elsewhere in this glossary. That resistance claim comes from open-source and operator reporting rather than independent testing.
Balloon-assisted launch: the wind mechanics
In May 2026, Ukrainian operators tested launching Hornet from a tethered helium aerostat at a reported altitude of roughly 8,000 metres. The balloon carries the drone to altitude, releases it, and the Hornet glides - unpowered and near-silent - for tens of kilometres before its electric propeller engages. By conserving battery charge for the terminal approach rather than spending it on climb, effective strike range potentially doubles from roughly 200 kilometres to around 400 kilometres, according to AirVeto's analysis of the Euromaidan Press report. Defence Blog, which covered the same test, explicitly flags specific range figures - including an earlier 300 km extended-range estimate - as unverified.
At 8,000 metres, the wind field is driven by large-scale synoptic patterns. Speeds of 60 to 150 km/h are common across the region in spring, and direction rotates as frontal systems pass. Ukrainian operators wait for appropriate atmospheric conditions before launch: the upper-air wind forecast is part of the targeting calculus. The aerostat phase also presents an unusual interception problem - helium balloons move slowly and present a low radar cross-section; the glide phase that follows is unpowered and produces minimal acoustic and thermal signature until the motor engages on terminal approach.
Operational history
Ukraine announced cooperation with Swift Beat in July 2025, and Hornet entered active use against Russian logistics from spring 2025. Ukraine's 1st Azov Corps has confirmed systematic use of the type against Russian supply routes across the Donetsk region, including the R-280 highway linking Rostov-on-Don to occupied Crimea, at distances the corps says extend to 160 kilometres behind the front line. Analysis group Tochnyi documented that mid-range logistics strikes of this kind more than doubled between February and March 2026, to at least 288 recorded raids. In May 2026, US Army personnel began training on the platform.
AirVeto context
Hornet operates against Russian supply lines inside occupied Ukraine and southern Russia, well south and east of the EU border corridors AirVeto tracks. No sourcing reviewed connects this drone to any incident in Polish, Baltic, or Black Sea EU airspace.
It appears in this glossary because it sits at the intersection of two phenomena this map covers. The first is the expanding inventory of balloon-borne payloads crossing or approaching EU airspace - primarily contraband systems launched from Belarus into Lithuania and Poland at 500 to 3,000 metres, where the wind at those lower layers sets the landing trajectory. Hornet is the military mirror of that category: same physics, different altitude, opposite direction of travel. Where a contraband balloon wants to descend into an unpopulated field on the EU side as quickly as possible, a strike drone wants to hold altitude before attacking a logistics node hundreds of kilometres deep in Russian-controlled territory. In both cases the operator's first decision is identical: is the wind doing what we need?
The second is GPS-degraded navigation. The jamming and spoofing environment that has pushed other drone types off course toward EU territory does not appear to affect Hornet in the same way, given its reported terrain-tracking primary navigation. Readers researching which systems are susceptible to the jamming corridors documented elsewhere in this glossary will encounter Hornet coverage and may ask whether it belongs here. As a trajectory-deviation risk it does not; as context for balloon-launched strike systems and their wind dependency it does.
AirVeto's altitude selector reaches 7 kilometres - one layer below the aerostat operating ceiling reported in the May 2026 tests. That layer reflects the wind environment the drone enters at the start of its glide phase, when its trajectory is most sensitive to atmospheric conditions.