| Year | 2012 |
| Date | 24-Aug |
| Volume | 209 |
| Issue | 4,437 |
| Page | 295 |
| Category | Electrical |
| Part | 3 |
| Title | A Twin Solenoid Engine |
| Author | Bob Perkins |
| Notes | Completes his second engine. Starting and reversing switch, flywheel and driving pulley, crankshaft, armature and connecting rod, assembly, running |