Stirling Engines and Air Engines by William Kidd of Ayr, Scotland – Special thanks to William “Bill” Kidd of Ayr, Scotland for sharing his wonderful work with us. The photos here show a collection of Bill’s Stirling engines and air engines, as well as a few more interesting engine designs. You will even notice that Bill has built a replica of Rev. Stirling’s original design. These engines are beautiful hand crafted finely machined moving works of art. Videos of these engines running will be posted in coming weeks.