| Year | 2017 |
| Date | 18-Aug |
| Volume | 219 |
| Issue | 4,567 |
| Page | 300 |
| Category | Hot Air |
| Part | |
| Title | Observations of a Displacerless Hot Air Engine |
| Author | Ian C Mayers |
| Notes | Constructs an pulse tube engine. My experimental engine, basic operation, the regenerator, the pulse tube, final thoughts, references |