The balloon as the first stage: where did the "balloon + drone" scheme come from and why is it being talked about again?
On May 26, 2026, balloons were intercepted over Sevastopol, dropping small electric attack UAVs as they approached the city. The combination itself seems odd: a helium balloon as a carrier of a combat payload. droneIt seems improvised: something cobbled together from a weather balloon and a model airplane. In fact, the "balloon plus UAV" combination has been tested for fifteen years, and the idea of landing a drone on a balloon predates most of today's drones existed at all.
What happened over Sevastopol?
According to open sources, the balloons rose to an altitude of approximately 5-7 kilometers, drifted downwind toward the city, and once over their target, small electric aircraft-type UAVs—referred to in Russian reports as "wings"—were released. According to Rossiyskaya Gazeta, the interception occurred during the drones' final flight, over Sevastopol itself.
Small aerial balloons (SABs) have been spotted over Russian regions for several years now: according to media reports, they have been found in the Kursk, Belgorod, Voronezh, and Moscow regions. Structurally, they are typically a shell several meters in diameter, containing basic electronics, a battery, and sometimes an angular reflector or lightweight munition. The exact specifications of the "wings" dropped from the balloons over Crimea have not been published in open sources (which is normal for a recent incident: details usually emerge later, from photographs of the wreckage). It is only known that these are electric UAVs, similar to fixed-wing aircraft, designed for a relatively short approach to their target after release.
The Sevastopol episode is interesting because of the combination itself. The balloon is responsible for liftoff and delivery to the target area, while the drone is responsible for the final approach; these functions are split between two inexpensive carriers. The design appears homemade, but its basic concept has long been described in open literature and was first publicly tested long before the current war.
The Launch Balloon: From the Barriers of the 1940s to CICADA-2011
The tethered balloon is a long-standing military device, far older than any drone. Barrage balloons were widely used during the First and especially the Second World War: Britain deployed them over London and its ports, while the USSR deployed them over Moscow and Leningrad. According to open sources, thousands of tethered balloons were held aloft by steel cables at altitudes of one and a half to two kilometers, primarily against low-altitude and diving attacks, making aerial approaches to targets dangerous and forcing crews to adopt more predictable trajectories. In this case, the balloon remained a passive obstacle, a physical barrier, and nothing more.
The idea of a "balloon as a launch platform" emerged later and operated according to a different logic. Its most publicly visible prototype was the testing of a micro-UAV. CICADA, conducted by the U.S. Naval Research Laboratory (NRL) using high-altitude balloons from Raven Industries in 2011 at the Yuma Proving Ground in Arizona. CICADA is an NRL program; Raven provided the lift. The design was almost primitive: a high-altitude balloon would lift the glider to 17,400 meters (above the ceiling of most aircraft), after which CICADA would separate and glide to deliver the payload to a designated point. (The payload is described rather sparingly in NRL publications, and it seems it wasn't the primary focus of the demonstration; the delivery principle itself was of interest.)
Engineers and technicians are preparing to launch a weather balloon that will lift the Tempest and CICADA spacecraft to an altitude of 18 km.
The engineering logic here is simple. Climbing is the most energy-consuming phase of any flight; for an electric UAV, it consumes a significant portion of its battery capacity. The cylinder handles this phase for free, thanks to the lift provided by the gas. A drone that separates at altitude has a reserve of potential energy at its disposal: even without a working engine, it can fly tens of kilometers, leaving the battery available for maneuvering and the final push. Launch infrastructure (catapult, guide rail, runway) is not required. Launch is possible from a clearing.
By 2011, this principle had no combat or even mass technological application: a laboratory demonstration, nothing more. But it demonstrated that altitude could be bought with helium. The primary sources for CICADA are NRL open source publications and industry periodicals from the early 2010s.
What has grown out of this scheme over fifteen years?
In the fifteen years since Yuma, the idea has been developed in several directions. The most notable is the attack UAV. Hornet (an American-Ukrainian aircraft-type loitering munition (developed by Swift Beat LLC/Perennial Autonomy)), the balloon launch of which was reported in 2025 Defense Express and a number of industry resources. According to open sources, the Hornet is designed for a ground launch of approximately 150 kilometers with a launch weight of approximately 15 kilograms and a payload of 4-5 kilograms. When released from a balloon at an altitude of approximately 8,250 meters, the effective range, according to the same sources, increases to 190-200 kilometers: a simple ratio of these figures yields a 25-35 percent increase without any increase in battery weight. The drone spends most of its flight in gliding mode with the engine off, saving battery life and reducing its radio frequency signature. The engine is activated during the final phase, closer to the target. Essentially, this is the same scenario as the 2011 Yuma Proving Ground launch, except the drone is larger and carries a warhead.
In parallel with the Hornet, a much more ambitious development emerged – the Canadian system Eagle APDS Landing Zones Canada, which, according to the company, completed testing in January 2025. It's a stealth glider with variable wing geometry, delivered by a balloon into the stratosphere. It claims to have a low radar signature and operate in conditions where satellite navigation is jammed. An important caveat: all we know about the Eagle APDS are statements and published photos from one developer; there's no independent verification yet, like with the Hornet. It appears the system hasn't yet progressed beyond the demonstration phase, but the very fact that they're working on a stratospheric balloon glider is indicative.
The third line is not a shock line, but an infrastructure line, and it's more interesting than it seems. Ukrainian companies Aerobavovna и Kvertus They produce tethered balloons that lift cameras, tactical communications repeaters, and electronic reconnaissance equipment to a height of several hundred meters. According to MilitaryThese aerostats provide stable communication between points up to 100 kilometers away and are used as aerial hubs for UAV coordination. Here, the balloon returns to its original transport function (lifting a payload and keeping it aloft for a long time), but the payload is no longer an eye or a bomb, but a network node. In new modifications, which the publication analyzed based on published photographs, The War ZoneA launcher for a single interceptor drone is also placed under the cylinder. The same cylinder then functions as a platform for a counter-attack on attack UAVs, essentially mirroring the CICADA principle.
A side issue worth at least noting: these same lightweight balloons are being used for covert reconnaissance of power lines and monitoring of railway infrastructure—tasks where a slow, drifting object at medium altitude is more convenient than a fast UAV. In other words, a launch platform is just one application; the market for inexpensive balloons is broader than military reports suggest.
Engineering balance and limits
Let's summarize what the balloon can do. Altitude is gained almost for free: helium or hydrogen replaces an engine and kerosene. Battery savings: gliding from a high altitude increases range by a quarter to a third, while the battery doesn't add a single gram of weight. Low launch signature: the balloon has no engine, heat signature, or acoustics; radar signature depends on the suspension and can be adjusted in both directions, from "almost invisible" to "deliberately loud" via a corner reflector. No launch infrastructure. The launch point is stealthy: while the balloon is drifting, it's difficult to reconstruct the launch site from its trajectory.
The price for all this is unpredictability. The balloon is carried by the wind, and the wind at different altitudes blows in different directions; even a good forecast doesn't turn drift into a planned flight. There is no controlled arrival time. En route communication, if needed for corrections, must be established separately: by tethered balloons or other repeaters. Separation algorithms (barometric sensor, timer, GPS geofencing) allow some of these limitations to be circumvented: the drone is released upon entering a predetermined corridor, without any time constraint. This solution is one-way: if the balloon is carried outside the corridor, the mission simply cannot take place.
Defenses with this design face their own challenges, and in some ways they're mirror images. A slow-moving target with a zero engine signature at an altitude of 5-7 kilometers is poorly visible to radars designed for fast targets, and inconvenient for a fighter whose interception profile is designed for speeds much higher. The target exists, but conventional tools are ineffective against it, hence the search for countermeasures like aerostat interceptors.
And then there's the economics. According to CSIS, one attack UAV of the type Geranium-2 It costs approximately $35. A helium balloon with basic electronics and a release unit is an order of magnitude, or even two, cheaper; this is why the combination of a cheap launch vehicle and a mass-produced electric drone proves economically viable even with losses.
Against this backdrop, the Sevastopol incident appears to be a transitional point. An altitude of 5–7 kilometers isn't the stratosphere of the Eagle APDS or the eight-plus kilometers of the Hornet, but a mid-level altitude, accessible to a relatively small balloon with relatively modest electronics. Current field practice, judging by open data, is closer to a cheaper Hornet variant than a stratospheric stealth glider.
From Yuma to Sevastopol is fifteen years, and the principle itself has changed little; what has changed is how and why it's used. Where the scheme will move next—to the stratosphere for Eagle APDS or to mass production of low-cost medium-altitude launch vehicles—will depend on the future price of helium and batteries. Helium, incidentally, has been rising in price in recent years; hydrogen is cheaper, but hydrogen presents different logistics and different risks when used on the ground.
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