Whenever I look at something like this I'm always a bit astounded by the variety and styles of similar-purpose objects. I would love to see a deep dive on the evolution of these designs; it always seems like there is untold history lurking in these -- why not make the wings shorter or longer, thicker or thinner, curved vs bicurved vs straight, some hollow and some solid. Was it a question of the amount of material used, or how many could be manufactured in a batch, casting the threads vs tapping them, hand sized or sized to openings, maximizing torque or limiting torque to prevent stripping.<p>One of my most annoying memories of a museum was visiting the Cooper-Hewitt design museum where they had a wall with imprints of coffee cup lids, and I was thrilled at the idea of reading about all the tradeoffs involved -- how much cup strength is offloaded onto the lid to save costs on that end, etc. But it turned out that the wall was just an Art with no deeper meaning. And then they had a car that they said was well designed and my reaction was just -- how can you show me good design without showing me either bad design (all the ways it can go wrong) or the evolution of that design?<p>If anyone knows any museums that would scratch this itch, please give me recommendations!