What is the angular difference defined for a teardrop holding pattern entry?

The angular difference defined for a teardrop holding pattern entry is indeed 45° or less. In a teardrop entry, the pilot needs to establish a specific angle relative to the entry leg and the outbound leg of the hold. By using a maximum angular difference of 45°, the pilot can effectively align the aircraft for a smooth transition into the holding pattern while maintaining proper situational awareness and control over the aircraft.

This particular angular limitation helps ensure that the aircraft remains within a controlled flight profile, allowing for a consistent entry into the hold while considering wind drift and other flight dynamics. Utilizing a 45° angle assists in keeping the maneuver efficient and safe, which is crucial in busy airspace or when entering holds on approach to airports.

Other options, such as 30°, 60°, or 75°, do not accurately correspond to the standard practice for teardrop entries within the context of holding patterns, as they do not meet the criteria established by flight training and regulatory guidelines for controlled entries into these airspaces.