Where is the authoritative information about the operating limits of a glider typically found?

The authoritative information about the operating limits of a glider is primarily found in the Pilot Operating Handbook (POH). This document is specifically designed to provide pilots with critical data regarding the aircraft's performance, limitations, and operational procedures. The POH includes detailed specifications about weight limits, balance, airspeed limits, and other important information that a pilot must adhere to for safe operation.

The pilot's manual, while it may contain useful information, is not as comprehensive or specific as the POH. It often serves as supplementary material that may not include all the operating limits for various conditions encountered during flight.

Manufacturer websites might provide general information about the glider and possibly some data sheets, but they are not considered authoritative sources for operational limits. They can change frequently and may not provide pilots with the level of detail needed for safe flying.

Training videos from instructors can be beneficial for learning and gaining practical knowledge about flying, but they do not serve as official documents and would not typically include the detailed operating limits that can be found in the POH.

Thus, the POH is the definitive guide for understanding the operating limits of a glider, making it the best choice for authoritative information.