Ukraine war spurs 'hedgehog' tank defenses against drone swarms

The drone warfare shift in ukraine

The widespread use of inexpensive drones in the war in Ukraine has dramatically altered battlefield tactics and forced rapid adaptations from both Ukrainian and Russian forces. The proliferation of first-person view (FPV) kamikaze drones, capable of delivering explosive payloads with pinpoint accuracy, has created a pressing need for new defensive measures. This has led to the emergence of a unique, improvised solution: tanks adorned with external barriers, quickly dubbed “hedgehog tanks.”

What are 'hedgehog' tanks?

Unlike traditional tank armor solutions like full turret cages, “hedgehog” tanks feature a more chaotic and improvised structure. Soldiers are welding dozens of spikes, metal rods, chains, and steel cables onto the tank's hull. These protrusions, extending 30-60 centimeters (roughly 1-2 feet) from the main armor, aim to disrupt the drone's detonation mechanism – most FPV drones detonate upon contact.

How does the defense work?

The design relies on tricking the drone's proximity sensor. When a drone strikes one of the protruding elements, the explosive charge detonates prematurely, before it reaches the tank's main armor. This detonation, occurring half a meter away, disperses the energy and shrapnel, significantly reducing the force needed to penetrate the vehicle’s armor. This effectively mitigates the impact of the drone's explosive force.

Common tank models employing the 'hedgehog' defense

This modification isn't exclusive to one type of tank. It's been observed on both Russian T-72 and T-90 tanks, as well as Ukrainian M113 armored personnel carriers. This widespread adoption highlights the urgency and adaptability of forces responding to the drone threat.

Operational drawbacks and mechanical strain

While seemingly effective, the