| Year | 1927 |
| Date | 28-Jul |
| Volume | 57 |
| Issue | 1,368 |
| Page | 74 |
| Category | Educational |
| Part | |
| Title | I Want to Know - |
| Author | |
| Notes | What does d.a.s.v. mean - description of an engine cylinder. One lathe centre is hardened, the other is soft. Why is this? What is a two-stroke motor? Why is there no flywheel on a locomotive? What is a permanent-magnet motor? |