| Year | 2023 |
| Date | 07-Apr |
| Volume | 230 |
| Issue | 4,714 |
| Page | 508 |
| Category | Stationary Engine |
| Part | 17 |
| Title | Grasshopper Beam Engine |
| Author | Martin Gearing |
| Notes | Presents an ideal beginner's project with great potential for the more experienced builder. Control valve body, control valve spool, manufacture of control valve spool |