How is a ram air parachute different from a round UAV parachute?

Unlike round or cruciform parachutes, a ram air parachute generates forward glide and directional control, allowing the UAV to steer toward a desired landing point instead of descending purely vertically. This significantly improves landing accuracy. The wing-shaped canopy enables steering, glide and precise landings with a glide ratio of approximately 1:4.5.

How accurate is the steerable parachute landing?

The system enables pinpoint landings with accuracy of up to 4 feet, allowing UAVs to avoid obstacles, land in confined areas and recover safely in complex environments. Flaring capability before touchdown further improves landing safety and minimizes ground impact, while controlled descent reduces the forces acting on the airframe.

Can a ram air parachute be safely deployed from a UAV in flight?

Yes. The ram air parachute is designed for safe deployment from straight and level UAV flight, using a slider system that reduces opening shock and protects the airframe during inflation. Comprehensive testing under multiple operational scenarios consistently demonstrated reliable deployment, controlled descent and safe UAV recovery.

Project · steerable parachute

Ram air steerable parachute for UAV retrieval

A steerable ram air parachute brings UAVs down with a glide path ratio of approximately 1:4.5 and pinpoint landings within a 4-foot radius.

Fixed-wing UAV descending over forested hills, the green canopy on lines above the fuselage with the bag seated on top

The challenge

Traditional UAV recovery systems rely mostly on round or cruciform parachutes, which are limited in maneuverability and accuracy. The challenge was to merge two technologies – advanced ram air parachutes from the skydiving industry and UAV platforms – to achieve safe in-flight deployment, precise steering and pinpoint landings.

In addition, the parachute needed to fit within restricted UAV compartments, demanding an ultra-lightweight and low-bulk design without compromising strength or reliability.

A ram air canopy built for UAV recovery

APCO developed a specialized ram air parachute designed for UAV recovery. Made from extremely light yet durable materials, it packs efficiently into compact UAV compartments while maintaining full strength and service life.

Slider against opening shock

To protect the UAV during deployment, the parachute is equipped with a slider that mitigates opening shock forces. This ensures safe and reliable deployment even from straight and level UAV flight, reducing stress on the airframe.

Fixed-wing UAV on the runway with the wind still holding the grey canopy inflated above it

Steerability, pinpoint landing and flare

Once deployed, the parachute delivers full steerability with a glide path ratio of approximately 1:4.5. It enables precise navigation, pinpoint accuracy within a 4-foot radius and flaring capability before touchdown – dramatically improving landing safety and minimizing ground impact.

Results

Demonstrated reliable deployment from UAV straight and level flight.
Achieved pinpoint landings with accuracy up to 4 feet.
Enhanced recovery safety through controlled descent, flare landing and reduced opening shock.

Testing and validation

Comprehensive testing validated performance under multiple operational scenarios. Trials consistently showed accurate landings, reduced impact forces and safe UAV recovery. The tests demonstrated the use of a ram-air parachute for UAV recovery.

Fixed-wing UAV under a yellow ram air parachute with a pink slider in flight

Source: apcodefense.com (APCO Aviation), as of 25 September 2026.