I was told that S21 wings that are early vietnam before 67 are silver soldered clutches and the later ones up through the 80s are electrostatically welded. However, I have never seen the two types...
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I was told that S21 wings that are early vietnam before 67 are silver soldered clutches and the later ones up through the 80s are electrostatically welded. However, I have never seen the two types...