What is typically used to check proper wing twist in a sheet metal constructed wing?

The use of a bubble level and special fixtures is fundamental for checking proper wing twist in a sheet metal constructed wing because it provides a reliable and accurate method to ensure the wings are aligned correctly. The bubble level allows technicians to check the levelness of a surface in relation to gravity, while special fixtures are designed to hold the wing in a precise position during the measurement.

Using these tools enables the identification of any deviations from the desired twist angle, ensuring that the aircraft will have its wings at the correct orientation during flight. This is essential for aerodynamic stability and performance. The combination of a bubble level and fixtures designed specifically for this purpose allows for a comprehensive approach to measuring twist accurately, as they can adapt to the specific geometry of the wing structure.