| Year | 2021 |
| Date | 15-Jan |
| Volume | 226 |
| Issue | 4,656 |
| Page | 167 |
| Category | Stationary Engine |
| Part | 1 |
| Title | The Middleton Double 'Monitor' Type Engine |
| Author | Rodney Oldfield |
| Notes | Constructs another of Bob Middleton's small but interesting engines. Engine base frame plates, cylinder mounting plate, outrigger base, thrust and front bearings, outrigger top plate, inner flywheel |