What are two criteria for cold bending repairs on aluminum propellers?

The criteria for cold bending repairs on aluminum propellers focus on the extent of the bend and the blade station location, as these factors are critical in determining whether a repair is feasible and safe.

The extent of the bend is essential because it directly impacts the structural integrity of the propeller. A minor bend might be acceptable for cold bending, as it allows for a restoration of the original blade shape without risking failure or introducing stress concentrations. However, if the bend is too severe, cold bending may not restore the propeller to a safe condition.

The blade station location refers to the specific point along the propeller blade where the bend has occurred. Different sections of the blade can experience different loads and stresses during operation. Therefore, knowing the blade station helps evaluate the repair's potential impact and how much bending is allowable without compromising performance or safety.

Other choices involve factors that might not directly pertain to the cold bending process itself. For example, weight and length are more general characteristics of the propeller rather than criteria necessary for bending repairs. Similarly, specifics about the type of aluminum and the age of the propeller may influence the overall assessment but do not define the cold bending criteria as directly as the extent of the bend and blade station location. Manufacturer