What is the most commonly used knot for tying down small aircraft?

The bowline is widely recognized as the most commonly used knot for tying down small aircraft due to its reliability and ease of use. This knot creates a fixed loop at the end of a rope, which does not slip under load, making it particularly suitable for securing aircraft in place. The fixed loop can be easily adjusted and undone even after being subjected to tension, ensuring that it can be removed with minimal effort after the aircraft is secured.

In aviation, where safety and security are paramount, the bowline provides a combination of strength and security, which is crucial when dealing with varying weather conditions that can exert force on tied-down aircraft. Its simplicity in tying and untying makes it accessible for all levels of experience among technicians and pilots, adding to its popularity in aircraft tie-down situations.

While other knots, such as the clove hitch and square knot, have their own applications, they may not offer the same level of security and ease of adjustment under load that the bowline provides.