| Year | 1941 |
| Date | 24-Jul |
| Volume | 85 |
| Issue | 2,098 |
| Page | 69 |
| Category | Improving the Two-Stroke |
| Part | |
| Title | "Getting Rid of the Hump" |
| Author | Edgar T.Westbury |
| Notes | Notes on "flat-top" or "deflectorless" two-stroke engines, and the special problems in their design. Theoretical path of gases working on the "Bilateral" principle, principles of flat-top engines, path of gases in a "Unilateral" flat-top piston engine, theory v. practice, common errors of design, a 15 c.c. two-stroke engine for experimental work, directing mixture into the cylinder at an acute angle, typical cylinder design |