This is the prototype of Captain America's shield made by Howard Stark.  This can be seen in the creating a new element scene in Iron Man 2.  THIS VERSION IS ONLY ONE PIECE AND ONLY FOR REFERENCE, NOT PRINTING.
Here is the split up .stl file link
https://thangs.com/model/7751

shield prototype assembly.stp #franklybuilt

This is the prototype of Captain America's shield made by Howard Stark.  This can be seen in the creating a new element scene in Iron Man 2.   It can be glued together or fastened using M3 and M4 screws.

Captain America Shield Prototype # franklybuilt

Mark 1 arc reactor from Iron Man 1.  This file is the coaster in one piece in case you don't plan on printing it.  the 2 piece file is here. https://thangs.com/model/7137 
This design is for the #frankly_built contest
#franklybuilt

mk 1 Arc Reactor coaster one piece

This design is based of the mark 1 arc reactor from Iron Man 1.  I designed it in solidworks and it should be ready to print.  The smaller the nozzle the better because of the intricate details.  I split the model into 2 pieces to avoid bridging. I sliced in prusa slicer and a .4mm nozzle seemed to work.
This model was created for the #frankly_built contest.
#franklybuilt

mk 1 arc reactor coaster

I am currently in college pursuing a mechanical engineer technology degree.  I have a gmax 1.5 printer that needs some updates

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shield prototype assembly.stp #franklybuilt

shield prototype assembly.stp #franklybuilt

Captain America Shield Prototype # franklybuilt

mk 1 Arc Reactor coaster one piece

mk 1 arc reactor coaster