| Year | 2011 |
| Date | 23-Sep |
| Volume | 207 |
| Issue | 4,413 |
| Page | 422 |
| Category | Stationary Engine |
| Part | 2 |
| Title | Making an Elbow Engine |
| Author | Stewart Hart |
| Notes | Completes his deceptively simple engine. Correction, valve ports, axle pins, pin and washer, base, flywheel post, assembly, lubrication |