| Year | 1991 |
| Date | 01-Nov |
| Volume | 167 |
| Issue | 3,908 |
| Page | 502 |
| Category | Hot Air Matters |
| Part | 1 |
| Title | Hot Air Engines: The Whys and Wherefores ... |
| Author | "Robbie" Robbins |
| Notes | Discusses their history and origins, simple design. How I got started, the how and why, applying the law to hot air engines, the working gas |