Swerve milled the master positive mold of high-density polyurethane foam from which each the Pentagon 9/11 Memorial modules were cast.
The final Pentagon 9/11 Memorial, as designed by Julie Beckman and Keith Kaseman
(photo © T. Plyler)
The high-density polyurethane foam mold stretched over 10' when finally assembled.
Endmill toolpath had to be minimized to the point of disappearing in order for the casting surface to be a success.