临界迎角是液体或气流从表面开始分离，导致流体效率降低的角度。临界迎角是设计空气动力学表面时的重要考虑因素，例如飞机机翼、涡轮叶片等，因为它决定着不会导致升力或推力损失的最大攻角大小。

You must use ear protection when you are near an engine that is in operation.

Make sure that the bogie rollers are aligned with the notches in the track.

To prevent damage to the engine, immediately install protective covers on all openings.

A mixture of water and methanol increases the power of the engine.

Make sure that the label fully attaches to the surface and that there are no bubbles.

Apply two layers of protective compound to prevent hydraulic fluid damage to the sealant.

It is the responsibility of the airplane owner and the pilot to insure that the airplane is loaded properly.

Overhaul of any or all components in this chapter must be accomplished with data supplied by the component manufacturer.

This paragraph should also explain that, in addition to the established inspections, other inspections may be required by Airworthiness Directives.

To obtain exact performance values from tables, it is necessary to interpolate between the incremental values.