| Year | 1987 |
| Date | 18-Dec |
| Volume | 159 |
| Issue | 3,815 |
| Page | 752 |
| Category | Hot Air |
| Part | |
| Title | Quack-a-Clink |
| Author | David Ayers |
| Notes | A vacuum engine described (Photographs by J.Campbell). Basic principles, problems with the design, cooling, cam and lubrication, flame characteristics |