How were the Teledyne Ryan 147 drones recovered in Vietnam?

The Ryan 147 did not return to a runway once its mission was over. On completing its task, the aircraft deployed its own recovery parachute, so that the final phase of the flight stopped being remotely piloted flight and became a braked descent under a canopy. From that moment the drone's fate depended on a third party, because the parachute was designed to be snagged in midair by a recovery helicopter, with the vehicle still hanging from it.

The US Air Force built that procedure around one specific aircraft: the Sikorsky CH-3E. The helicopter would approach the descending parachute-and-drone assembly, hook the canopy in the air, and then winch the load aboard. That full sequence — parachute deployed by the vehicle itself, aerial hookup, and winch recovery — is what set the recovery of these aircraft apart from that of a conventional airplane: everything was resolved within the minutes of descent, without the drone ever touching down under its own power.

The system was not an isolated curiosity but the standard procedure, applied on a large scale. Across the whole program, 2,655 successful recoveries were logged out of 2,745 attempts, a 97% recovery rate. In other words, nearly every drone that reached the final phase ended up hanging from a helicopter's winch, proving that a method as delicate as snagging a parachute in flight could be repeated thousands of times.