3 ms·

I assume Friction Stir Welding is getting more popular in aircraft partly due to easier verification.

• namibj 3y ago
  It's also capable of handling very thin material and it's very repeatable. The https://en.wikipedia.org/wiki/GTW_Generation_15 https://en.wikipedia.org/wiki/GTW_Generation_15 trains also rely on it, as the weight limit stems from the track (to passively bank in curves, the cabin is underneath the rail (and there's only one rail as this arrangement is stable and just acts like a pendulum), so the track needs to be a bridge).