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).
Modifications to a ramp head single cylinder car engine test unit.
| Identifier | ExFiles\Box 133\2\ scan0014 | |
| Date | 17th April 1934 | |
| X4706 To DY.{F R Danby} from E/PSN. c. Hs.{Lord Ernest Hives - Chair} LR.{Mr Ellor} E/PSN.3/HP.17.4.34. Ramp Head Single Cylinder Car Engine Test Unit. We send you herewith LeC.3871 showing modifications to the ramp head of the single cylinder car engine test unit. These modifications include a larger degree of forced turbulence obtained by modifying the contour of the head, two extra plug bosses, and a larger exhaust valve. All these modifications should be obtained by modification to the existing pattern. Provision is also made for increasing the compression ratio from 6.44 to 1 to 6.88 to 1 by removing material from the face of the head. E/PSN. | ||