| Year | 1957 |
| Date | 24-Jan |
| Volume | 116 |
| Issue | 2,905 |
| Page | 137 |
| Category | Hot Air |
| Part | |
| Title | An easily made Hot-Air Engine |
| Author | R.F.M.Woodforde |
| Notes | Describes step by step. Drove gunboat, construction, displacer piston, the gland, flywheel, base, crank throw, test, side elevation and plan |