What is the location of the second sight line of a U-shaped channel, 1'' x 5'' x 1'', 2024-T6, .064 thickness using minimum bend radius?

To find the location of the second sight line of a U-shaped channel, you need to consider the geometry of the channel and how the minimum bend radius affects the dimensions. For a U-shaped channel with specified dimensions of 1 inch by 5 inches by 1 inch and a thickness of .064 inches, the calculation for the sight lines generally involves determining how the bending and the specific material properties (in this case, 2024-T6 aluminum) influence this location.

When bending a U-shaped channel, the rule of thumb for minimum bend radius typically involves taking into account the material thickness. The second sight line is often calculated based on half of the internal height of the channel plus an additional factor that accounts for the bend radii and thickness.

In this scenario, when calculating the second sight line, you would consider the overall height of the channel (5 inches) and subtract the bend allowance due to the thickness of the channel and the minimum bend radius. This results in the second sight line being located at approximately 5.77 inches, which corresponds to the correct answer.

This comprehensive understanding of geometry, material properties, and bend allowances is critical for tasks involving structural components in aerospace applications, particularly when assessing parts for inspections or maintenance as outlined