After 3 years of engineering

https://www.youtube.com/@UCpp6lgdc_XO_FZYJppaFa5w https://www.youtube.com/@UCgeQiJg-PIH5MZQn0aRd1mg Here are all the engines I have made in three years. I also show some failures, such as a single cylinder with a rotary valve and a flat 4. I have not shown a die filer and some Hemmingway kits. Many thanks to Joe Pie, Keith Appleton, and others who spend their time and great effort for very little gain for their videos and tutorials.