| Year | 2018 |
| Date | 25-May |
| Volume | 220 |
| Issue | 4,587 |
| Page | 773 |
| Category | Aeronautical |
| Part | 8 |
| Title | The ENV Aero Engine |
| Author | Stephen Wessel |
| Notes | Continues an occasional series on the construction of an elusive prototype. The Zenith principle, calibrating the jets, the float chamber, construction |