Which UAS is known for using a hydraulic-pneumatic launcher assist during its launch?

The RQ-7B Shadow is recognized for incorporating a hydraulic-pneumatic launcher assist during its launch process. This system enables a smoother and more controlled launch, enhancing the aircraft's operational readiness and effectiveness. The hydraulic-pneumatic mechanism provides the necessary force to propel the UAS into the air, allowing it to take off from locations that may lack extensive runways or launch pads.

In contrast, other options, while still being capable UAS platforms, utilize different launch methods. For instance, the RQ-11 Raven is typically launched by hand, relying on the operator's physical throw to achieve flight, which is best suited for small and portable applications. The MQ-5B Hunter, on the other hand, employs a catapult system for launch but does not feature the hydraulic-pneumatic assist that is characteristic of the Shadow series.

In summary, the design and technology of the RQ-7B Shadow enable it to benefit from the hydraulic-pneumatic launcher assist, making it a distinctive choice when considering launch mechanisms used in UAS.