| Year | 1998 |
| Date | 23-Oct |
| Volume | 181 |
| Issue | 4,079 |
| Page | 514 |
| Category | Hot Air |
| Part | 6 |
| Title | Little Gem. A Twin Cylinder Hot Air Engine |
| Author | Ray McMahon (Northern Ireland |
| Notes | The more delicate components. Displacer connecting rod, displacer rod, piston rod, final assembly, propeller hub |