S58

S58 is a designation used in multiple contexts to identify a variety of models, components, or systems. It does not refer to a single item, but rather to several distinct products across industries.

In aviation, the most prominent use is as a model designation for helicopters. The Sikorsky S-58 refers to a family of large rotorcraft developed in the mid-20th century for civil and military applications. The design was also produced under license in the United Kingdom by Westland Aircraft, which used the designation Westland S58 for its licensed version. These helicopters were employed in roles such as transport, utility work, and search and rescue in different countries.

Outside of aviation, S58 appears as a model or catalog number in other mechanical and technical fields. It may be used to designate components, equipment platforms, or parts within various manufacturers' product lines. Because the same code can appear independently in unrelated sectors, the exact meaning of S58 is determined by the context in which it is used.

The term S58 thus functions as a generic designation rather than a unique item, requiring specification to identify the exact product or model in question. When encountering S58, additional information such as the manufacturer, industry, or application is necessary to determine the precise reference.