Inside Out Radial Motor by irvin (Self Propelling Gearwheel)
grabcad
As the name indicates, it is a self propelling gear wheel mechanism. But actually i am not sure about its working. Comments are welcome. Drawings of this model were downloaded from http://www.homemodelenginemachinist.com/ All parts are modeled in ProE except Bearings. Drawings and detail manufacturing instructons are included for download. Attached photos of the model are simple pictures tken from software and not rendered, as i m not expert of rendering.
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