Inside Out Radial Motor by irvin (Self Propelling Gearwheel)
grabcad
This mechanism is aptly named a self-propelling gear wheel device; however, I'm uncertain about its operation. Please feel free to provide your insights. The drawings were sourced from http://www.homemodelenginemachinist.com/. All parts, except the bearings, are meticulously modeled in ProE. Detailed manufacturing instructions and drawings are available for download. The attached photos are straightforward snapshots taken from software as I am not proficient in rendering.
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