From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Possibilities of a two-valve ramp cylinder head design to reduce engine detonation.
| Identifier | ExFiles\Box 134\1\ scan0082 | |
| Date | 1st April 1938 | |
| 1129. By/ALD.{F. Allwood - Experimental Design} from Rm.{William Robotham - Chief Engineer} c. By.{R.W. Bailey - Chief Engineer} c. Da{Bernard Day - Chassis Design}/Jnr.{Charles L. Jenner} Rm{William Robotham - Chief Engineer}9/R.1.4.38. COMBUSTION CHAMBER DESIGN. When Taub was here the other day, he became enthusiastic over the possibilities of the two-valve ramp head if used with a piston having a bump on it. If the bump on the piston can be made to reduce the tendency to detonate we can see definite possibilities for this valve arrangement, particularly when applied to a 12-cyl. vee engine, which does not easily lend itself to the application of the high power head. We find that we have two ramp cylinder heads in existence, and are going to use one of these as a yard stick, and modify the other one in conjunction with various piston shapes to see if there is anything in Taub's theory. We shall be glad if you will detail the attached schemes PD.410. From the cylinder head point of view it would be sufficient to mark up the blue prints on the existing head. Rm.{William Robotham - Chief Engineer} | ||