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Granted, foam is safer than rivets, but still...
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Yep. It is all relative. NASA has one less shuttle due to a bit of foam that didn't stay put.
This year's prototyping scares me. Not as much as the propellors in '09 that teams were demonstrating running directly off a CIM shaft or wobbly bit of chain -- with no speed controllers in the loop, just powered 100% off the battery.
But please please think about the shooter wheel as a rotating hazard. Also be careful of long hair, loose clothing, hoodie strings, etc.
Greg McKaskle