| Year | 1990 |
| Date | 21-Sep |
| Volume | 165 |
| Issue | 3,881 |
| Page | 359 |
| Category | Stationary Engine |
| Part | 2 |
| Title | Air Engine. Converting a sewing machine into a Beam Engine to demonstrate Watt's Link Motion. |
| Author | W.E.Dean |
| Notes | (Photos: John Punch). Valve cylinder sub-assembly, cylinder boring arrangement, boring tool, cylinder design, valve design, suppliers of air and parts |