Direct proof of use
The Eos C VTOL is documented in Ukrainian use during the full-scale phase of the 2014 Russia-Ukraine War through Ukrainian charity records, donor reporting, and manufacturer context. In 2022, Lithuanian crowdfunding bought EOS C VTOL reconnaissance drones for Ukraine while Ukrainian operators were training on the system. The Serhiy Prytula Charity Foundation later described Ukrainian frontline requests for EOS C VTOL drones and stated that the systems were used to adjust artillery, including HIMARS fire.
A separate Prytula campaign for Ukrainian Defence Intelligence assault units described EOS C VTOL complexes as tested in the war for reconnaissance and artillery-fire adjustment. That evidence supports Ukrainian fielding for intelligence, surveillance, reconnaissance, and fire-correction work, but the public sources do not identify every recipient unit or provide a complete inventory of Ukrainian Eos C VTOL losses and sorties.
Sources: Ukrinform Lithuania buys four more drones for Ukraine, Oryx Lithuanian weapons deliveries to Ukraine, Prytula Foundation We will fight the enemy everywhere, Prytula Foundation We detect - we destroy
Transfer and fielding timeline
Public reporting places the first documented Ukraine-linked EOS C VTOL transfer activity in June 2022, when Lithuanian fundraising bought the aircraft for Ukraine. Ukrinform reported on June 10, 2022 that four additional EOS C VTOL reconnaissance drones had been purchased and that Ukrainian operators were already training. Oryx's Lithuanian support inventory summarized the same donor channel as seven EOS C VTOL reconnaissance UAVs crowdfunded by the Lithuanian public.
By later Prytula Foundation campaigns, the Eos C VTOL had moved from transfer reporting into source-backed Ukrainian operational use. One campaign said soldiers at the front needed EOS C VTOL drones to adjust artillery and HIMARS; another sought EOS C VTOL complexes for Defence Intelligence assault units and described the system as used for reconnaissance and artillery-fire adjustment in the war.
Sources: Ukrinform Lithuania buys four more drones for Ukraine, Oryx Lithuanian weapons deliveries to Ukraine, Prytula Foundation We will fight the enemy everywhere, Prytula Foundation We detect - we destroy
Battlefield role
In Ukrainian service, the Eos C VTOL appears as a tactical reconnaissance and targeting-support UAV rather than a strike aircraft. Threod markets the aircraft as an electric vertical-takeoff unmanned aircraft system for ISR missions with an integrated eOpic-5 electro-optical and infrared payload, fixed-wing cruise, vertical launch and recovery, encrypted digital links, and navigation features intended for difficult electronic-warfare conditions.
The conflict-use sources describe tasks consistent with that configuration: finding enemy positions, observing the front, and correcting artillery fire. The Prytula Foundation's HIMARS-adjustment language connects the UAV to targeting support for other weapons rather than independent attack. Threod also described feedback from Ukrainian users and a Ukrainian training-center context for its wartime VTOL drone work, supporting the broader service environment without replacing the direct-use evidence from Ukrainian campaign records.
Sources: Eos C VTOL, eOpic-5, Prytula Foundation We will fight the enemy everywhere, Prytula Foundation We detect - we destroy, Threod Ukraine operator feedback
