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Hi Steve, great question! The 3D printed pivots are sized so that they bump the visor outwards just a bit. The flexibility of the acrylic also helps, allowing the visor to be widened by just enough to clear the top of the helmet. At NASA, though, I'm quite certain they manufacture their visors to have a slightly larger radius than the helmets.
Dinosaur Skull HeaddressView Instructable »
Ah, I see! It should have said "The space helmet collar is actually the top edge of a 2-gallon bucket." The diameter is 9.5" which worked perfectly for these.
Good catch! The link has been updated.
Pivot files sent! For the 12" sphere, another maker had successfully completed a 12" helmet using the full-size pivots. The main difference was that only 3 of the 4 visor bolt holes were used. That being said, it would be interesting to see what would happen if the pivots were scaled to 86% (I think?) of original size to adjust for the size of the helmet.
I've printed some pivots in ABS and others in PLA, and each one worked great. They are designed to be on the robust side without needing to be printed with solid fill. I think as long as they are printed with a wall thickness of 3+ layers, they'll be good.
Hi there,Sure thing! What email address should I send them to? The email will come from me at firstname.lastname@example.org.Best,Jenn
Hi there, I'd be happy to send the files! What is your email?
This looks amazing! Congratulations on such a successful build. Love the idea of nesting the LEDs along the collar. Out of curiosity (an in case other makers would like to make one too), did the pivots scale directly for the smaller sphere, or did you need to make any changes to them?
This turned out sooooo awesome! Thank you for sharing it!
Excellent transformation of materials! The final result doesn't look at all like styrofoam, certainly looks like you got something straight out of Myst!
Thank you so much, Mikaela!