PLA Drones Upgrade: China Learns from Ukraine War
Chinese Engineers Propose Rocket Boosters to Radically Improve drone Survivability
In the ongoing conflict between Russia and Ukraine, drones have become indispensable for reconnaissance and aerial combat. While Ukrainian air defenses have proven increasingly effective – data shows a rise from 5% to 15% of russian drones breaching defenses between April and June – a team of Chinese aerospace engineers and defense researchers believes they have a solution to dramatically improve drone survivability, potentially boosting success rates to nearly 90%.
Their innovative proposal, detailed in a study published last month in the Chinese defense journal Acta Armamentarii, centers on equipping small to medium-sized drones with compact, side-mounted rocket boosters.
These boosters aren’t intended for sustained flight, but for a critical, last-ditch maneuver. They enable drones to execute instantaneous, high-G maneuvers in the final moments before being intercepted by a missile. This “terminal evasion” system allows for abrupt, unpredictable course changes that even the most advanced missiles struggle to track.
According to the simulations,drones equipped with this system achieved a remarkable 87% survival rate. In numerous scenarios, the missiles detonated harmlessly in empty space.”Extensively employed drones for reconnaissance and aerial combat, making [them] increasingly crucial on the battlefield,” wrote the research team, led by Bi Wenhao, an associate researcher at the National Key Laboratory of Aircraft Configuration design at Northwestern Polytechnical University in Xian. Chinese military analysts, observing conflicts like the war in Ukraine, have identified “higher demands on the evasion capability and survivability of unmanned combat aircraft.”
Three Key Principles of Terminal Evasion
Traditionally, drones attempt evasive maneuvers well before a missile impact, often forcing them to abort their missions. Bi’s team proposes a radical alternative: executing evasive actions at the last possible moment.
This approach hinges on three crucial principles:
Precise Timing: The rocket boosters must ignite within a narrow one- to two-second window before impact. This timing is critical - early enough to alter the drone’s trajectory, but late enough to prevent the missile from substantially adjusting its course.
Directional Intelligence: The system requires real-time assessment of the missile’s approach vector to determine the optimal evasive maneuver - whether to climb, dive, or veer laterally.
* Extreme Acceleration: The boosters must deliver at least 16Gs of acceleration – a force far exceeding the capabilities of conventional aerodynamic control surfaces – to achieve a sudden, disorienting shift in flight path.
Integrating these rocket boosters into a drone’s airframe presents significant engineering challenges. The study acknowledges the complexities of mounting the boosters without compromising the drone’s aerodynamic performance or stability. However, the potential payoff – a dramatic increase in drone survivability - could reshape the future of aerial warfare.