Final answer:
The engine operating limit for N1 at APR (max power) depends on the specific engine model and aircraft type. It is necessary to consult the engine manufacturer's documentation and aircraft operating manuals for specific values.
Step-by-step explanation:
The question is asking for the engine operating limit for N1 at APR (max power).
N1, also known as the low pressure compressor (LPC) rotational speed, is an important parameter in aircraft engines. At maximum power, the engine operates at its highest performance level.
The engine operating limit for N1 at APR (max power) depends on the specific engine model and aircraft type.
For example, in a Pratt & Whitney PW4000 engine used in Boeing 747 aircraft, the engine operating limit for N1 at APR (max power) is typically around 100%.
However, it is important to note that engine operating limits can vary depending on the engine manufacturer, aircraft model, and other factors.