| Year | 2018 |
| Date | 05-Jan |
| Volume | 220 |
| Issue | 4,577 |
| Page | 91 |
| Category | Aeronautical |
| Part | 3 |
| Title | The ENV Aero Engine |
| Author | Stephen Wessel |
| Notes | Continues an occasional series on the construction of an elusive prototype. Valves and guides, piston design, a note about IPA, piston making, con rods |