Professional Answer:

Aircraft rigging primarily uses a type of wire rope often referred to as aircraft cable. This cable is distinguished by its precise construction and high strength-to-weight ratio. The most common constructions are designated as 7x7 and 7x19, which describe the number of wires and strands.

• 7x7 Construction: This cable consists of seven strands, with each strand composed of seven individual wires. This construction provides medium flexibility and is typically used for fixed rigging, such as in trim tab controls or engine controls, where high strength and minimal stretch are essential.

• 7x19 Construction: This type consists of seven strands, with each strand made up of 19 individual wires. The higher number of wires per strand makes the cable much more flexible, which is ideal for primary flight control systems that operate over pulleys and require frequent movement, such as ailerons and rudders.

These cables are typically made from galvanized or stainless steel, with stainless steel offering superior corrosion resistance for demanding environments.