The word "radials" is spelled as rəˈdiːəlz, with the stress on the second syllable. It refers to a type of tire construction where the cords in the tire run perpendicular to the centerline of the tire. This type of construction provides better handling and longer tire life. The word "radials" is derived from the noun "radial", which means anything that radiates or extends from a central point. The -als suffix added to "radial" indicates that it is plural.
Radials is a term used in various contexts to refer to different concepts. One common definition is related to tires and automotive engineering. In this context, radials are a type of tire design technique that utilizes cords that run at a 90-degree angle to the direction of travel, creating a smooth and flexible structure. This design allows the tire to have better grip and stability, distributing the weight evenly across the tread. Radial tires are widely used in modern vehicles due to their superior performance, fuel efficiency, and durability compared to bias-ply tires.
Radials can also refer to a type of aircraft engine, specifically the radial engine. This engine design features a set of pistons arranged in a circular fashion around the crankshaft, resembling the spokes of a wheel. Radial engines were commonly used in aircraft during the early to mid-20th century, delivering high power-to-weight ratios, simple maintenance, and efficient cooling.
Furthermore, radials can also describe a type of road or track layout. In racing, especially oval tracks, a radial course refers to a path that extends from the inner to the outer edge in a straight line, forming a 90-degree angle with the track's centerline.
Lastly, radials can be used to describe a navigational system or a set of routes that emanate from a central point, such as the pattern of roads leading out from a downtown area, forming a radial network. These radials act as major arteries, connecting the center with surrounding regions.
The word "radials" is derived from the noun "radial", which originated from the Latin word "radialis". In Latin, "radialis" is the genitive form of "radius", meaning "ray" or "spoke". "Radial" as an adjective entered English in the mid-17th century, primarily used to refer to anything that was "radiating" or extending like rays from a central point. The term "radials" is the plural form of "radial" and refers to multiple things radiating or extending like spokes from a center.