SPAG Anti-hail system
Shock wave generator (hail cannon) — 80 ha, radius 500 m
Shock wave generator (hail cannon) — 80 ha, radius 500 m
Shock wave generator (hail cannon) — 80 ha, radius 500 m
The SPAG anti-hail system is a shock wave generator — colloquially a “hail cannon” — and NOT hail netting. No structure is erected over the crop: the unit stands in the field and emits a shock wave into the atmosphere every 7 seconds. Repeated pulses disrupt the formation of hailstones, and hailstones falling from the cloud, interacting repeatedly with the wave, become destabilised — their natural breakup is accelerated. Within the zone covered by the system, hail is weakened and fragmented, often falling as water or fine hail grains. The wave covers a radius of 500 m, and the guaranteed minimum protection range is 80 ha with effectiveness of at least 95% (100% protection against typical hail). Because there is no netting over the crop, there are also no drawbacks: shading, restricted machinery access or limited ventilation.
Anti-hail system — specyfikacja
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Shock wave generator (hail cannon) — 80 ha, radius 500 m
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The most common questions we hear from farms before purchase.
We have collected the questions we most often hear from farms before purchase — and the answers from our engineers. Every answer is based on verified knowledge of the machine.
- manufacturer's materials
- dokumentacji technicznej
- questions asked by farms
Answers based on the experience of thousands of farms in Europe.
No. The SPAG anti-hail system is a shock wave generator (colloquially a hail cannon). No structure is erected over the crop — the unit stands in the field and emits a wave into the atmosphere.
In a controlled combustion chamber, the shock wave is produced by mixing acetylene gas with oxygen. Waves are emitted every 7 seconds and increase air resistance — falling hailstones, interacting with them repeatedly, become destabilised and break up. Within the protected zone, hail falls weakened and fragmented, often as water or fine hail grains.
The wave covers a radius of 500 m, and the guaranteed minimum protection range is 80 ha.
Yes — thanks to Doppler radar, the unit monitors and detects hail risk in real time and starts automatically. It can also be started manually from the control panel or remotely from a phone.
The system is fitted with a noise-reducing silencing system. Stationary and mobile configurations are available.
Anti-hail system
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