Copyright © 2017 by "Richard Higby" All Rights reserved
Richard Higby Astrophotography
Made from raw metal stock from plans by Jan Ridders - Netherlands
This small 12 c.c IC engine took about 9 months to build and completed in 2017.
(see the video)
Details of the build at ..... https://www.homemodelenginemachinist.com/threads/otto-4-stroke-completed-richard-higby.26424/#post-289502