The V-1 Buzz Bomb or the German Fieseler Fi 103 is one of the most notable examples of historical Unmanned Aerial System that was used during the World War I (Walker, 2016). The UAS was powered with a pulsejet engine that produced a distinctive buzz sound. The UAS can fly approximately 150 miles while carrying a load of 2000 pounds. The operation system of the UAS was developed using barometers, an anemometer, and gyroscope.

On the other hand, one of the most notable contemporary design of the UAS is Northrop Grumman RQ-4 Global Hawk. The design of the RQ-4 Global Hawk is equipped with various sensors capable of monitoring through the dust storms, haze, fog, and cloud (Chesworth et al., 2016). In addition to that, the communication through data transmission is much faster than any other UAS. 

Similarities: The design of the V1 Buzz Bomb is based on the sophisticated guidance system based on various detailed sensors that help in evaluating the environment and calculating the flight distance (Walker, 2016). Similarly, in the case of the RQ-4 Global Hawk, the infrared and optical sensors are used for providing systematic surveillance of the target and flight.

Dissimilarities:

The V1 does not have any specified communication system in the design. The RQ-4 is equipped with MCE (Mission Control Element) and LRE (Launch and Recovery Element) communication system for providing a continuous connection with the ground unit (Chesworth et al., 2016). 

Design Change: The VI wasdesigned with welded steel and plywood was used for constructing the wings. The use of pulsejet engine has powered the UAS with 50 pulses per seconds. In the case of the RQ-4, the system is powered by “Allison Rolls-Royce AE3007H turbofan engine" that provide the system with the thrust of 31.4 kN (Tao, & Hansman, 2016).

The technological advancement in the aeronautics and dynamics has led to the evaluation of the UAS. In the historical period, the UAS was used only for the warfare and as a defensive weapon. The application of the sophisticated technology with the new designs has expanded the capabilities of the UAS from military usage to ground mapping, mineral exploration, crop monitoring, search and rescue mission and even surveillance.