So what’s a “spade” the examiner asked ?........:) Now I have heard of balance weights and flutter but have never heard of a spade. This question moved on to a recent crash that apparently broke apart, with the wings being twisted off due to flutter, a Yak of all things. I thought they where built like tanks and that flutter might destroy a control surface, but total wing failure ?



So I went searching for information, in my books and on the web and came up with nothing much, other than it’s a big problem on model aircraft. So any info you guys might have on the subject would be greatly appreciated.