I believe it was the Constellation that was bpopping rivets in
turbulence, the fix was 300# of lead in each wing tip.
JJ

Dave Nadler wrote:
On Dec 10, 1:02*pm, SoaringXCellence wrote:
The weight toward the tips provides an interial resistance to roll.
That means the ride is a little smoother as the wing has greater
resistance to differential vertical gusting across the wingspan. *It
is the same principle that tightrope walkers use by carrying a long
heavy pole.

Also helps stabilize the glider in a spin.