H.A.L.O. – High Altitude Low Opening

H.A.L.O. (High Altitude Low Opening) parachute platforms are typically engineered with a two-stage or three-stage deployment sequence, ensuring precise control during high-speed, high-risk descents.

Stage 1 – Drogue Stabilization:
The initial parachute, often a drogue chute, stabilizes the platform’s direction and reduces excess speed. This step prepares for either another stabilization stage or direct main canopy deployment. The drogue operates at high flight speeds, enabling the platform to reach minimum safe main canopy opening altitude – the defining characteristic of low opening profiles.

Stage 2 – Controlled Descent:
This high-speed descent results in rapid altitude loss and minimal drift, a critical advantage in defense and tactical operations where pinpoint landing accuracy is essential. Directional stability and descent-speed control ensure consistent and reliable main canopy openings, even at the lowest operational heights possible.

H.A.L.O. (High Altitude Low Opening) parachute platforms

H.A.L.O. (High Altitude Low Opening) parachute platforms

Main Canopy Deployment

The main parachute is extracted at low altitude by either the drogue or a secondary stabilization chute. Depending on opening speed and maximum allowable G-loads, reefing lines or slider mechanisms are integrated to manage deployment shock and protect payload integrity.

Transition Control & Safety Systems

  • Sensors: Deployment stages are triggered by onboard barometric sensors measuring altitude, or by descent rate sensors detecting reduced vertical speed as atmospheric pressure increases.
  • Speed Measurement: Dedicated devices combine static and dynamic pressure readings via Pitot tubes, applying Bernoulli’s principle for accurate airspeed calculation.
  • Mechanical Transition: Parachute changeover is executed by precision release mechanisms or pyrotechnic/pressure cutters such as Cypres® line cutters, ensuring flawless operation under extreme conditions.

H.A.L.O. (High Altitude Low Opening) parachute platforms

Applications

H.A.L.O. systems are widely used in special forces operations, high-altitude UAV recovery, and covert resupply missions, where low-bulk, lightweight, high-performance parachute solutions reduce detection risk and improve mission success rates.