We've seen GrabCAD team up with Stratasys for 3D printing challenges, but this time, the digital manufacturing hub joined with topology optimization software company Frustum, focused on developing the latest design tools through its Generate software platform, for a joint challenge. Yesterday, Frustum announced the winners of the Generate-GrabCAD Quadcopter Challenge. The challenge, which was hosted on GrabCAD's Community platform, asked participants to use the cloud-based generative design Generate software, and traditional CAD modeling software, to make an optimized, 3D printed quadcopter airframe design. Designers were tasked to utilize constraint-driven design methodology to make a lightweight quadcopter. Read more at 3DPrint.com: http://3dprint.com/168006/frustum-grabcad-challenge/