Ukraine's attack drone fleet is facing a mini jet engine supply crunch amid Russia's attack on Ukraine. Mini turbojet drones are faster than propeller-driven models and cheaper than cruise missiles, allowing Ukraine to strike deep inside Russian-held territory while competing with advanced Russian systems like the Geran-5. However, a shortage of mini engines is raising concerns about a potential supply crunch for deep-strike drones. Experts and government officials have highlighted a shortage in mini-jet engine production in Europe, which is crucial to reducing Europe's reliance on the US. Ukrainian defence industry source: The mini-engine shortage is likely to limit the number of missile drones produced. Czech-based PBS Group has increased production five-fold since 2023 and expects it to increase eight-fold by the end of this year as Ukrainian demand surges.