What is the wingspan of a Viking aircraft?

The wingspan of a Viking aircraft is indeed 17.5 meters. This measurement is an important specification that affects the aircraft's aerodynamics and performance characteristics, such as lift generation and stability in flight. The wingspan plays a crucial role in the design and operational capabilities of the aircraft, influencing factors like maneuverability and fuel efficiency.

In context, the other choices do not reflect the actual wingspan of the Viking aircraft. For instance, an 8.18-meter wingspan would be too short for the performance profile of this type of aircraft, and 1.55 meters is far too small to be viable for any operational flight vehicle. A wingspan of 20.0 meters, while it may seem plausible, exceeds the dimensions of the Viking design and would not align with its engineering specifications. Thus, 17.5 meters is the correct and recognized wingspan measurement for the Viking.