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An own design , air cooled V12, with a propellor speed reduction gearbox and supercharger. The conrod is the first one. Needs different bolts, and both ends still need reaming. The bright yellow cylinder heads are 3D prints, in order to check dimensions etc before cutting metal.

An overhead cam (OHC) four stroke I designed and built myself . It did fly successfully, but exposed some bad material choices I made. Currently being overhauled to replace the damaged parts. Update 13/10/2017: New larger valves with cast iron seats have it running reliably , and now turning a...