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19-Tanzanite
April 8, 2021

Before retiring, in what field of engineering did you work? 
Aerospace?

23-Emerald I
April 8, 2021

Most of my career was as a wind tunnel test engineer for Sikorsky.  They wouldn't let me near the "real" helicopters!

24-Ruby IV
April 9, 2021

One solution in helicopter's field wthout animation is not a solution 😀