I've read a lot about the NitroPlanes/ProJet MQ-9 Reaper, and mostly about how to outfit it with a camera.  Before I received my plane from some ignoramus who packaged it like a 2-year-old might do, I thought that I could cram a GoPro camera into the "ball".  And yes, a GoPro will fit inside the "ball"... but not the way one might like.

The 3D rendering above shows how badly the GoPro fits into the stock MQ-9 camera housing.  The lens is far left and high... which would certainly bring poor results.

The above image shows my 3D model of the camera housing, rotated to view the camera at the same angle of the fiberglass housing's opening (-25°).  The GoPro 3 will not fit into the housing (with a proper viewing position) without modification to the right side of the fiberglass housing.

The above image shows a hidden line view of the camera housing with the GoPro 3 camera.  I have the original 3D model that created these images available for anyone who shows interest.  I will soon be posting photos showing actual dimensions of the camera housing, for anyone who does not have the ability to use 3D CAD software.

These images were created using TurboCAD v16, however I can send files to you in just about any format you might like.  I also have SolidWorks, but cannot translate a .TCW file into a .SLDPRT file without entirely remodeling this... which I have no intention of doing, at this point.