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).
Potential modifications to the cylinder head and induction pipe arrangement for the India 3 model.
| Identifier | ExFiles\Box 56\2\ Scan146 | |
| Date | 1st April 1928 | |
| R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} c. to BJ. Hs.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} INDIA 3 - ARRANGEMENT OF CYL: HEAD X.5050 AND INDUCTION PIPE. X.5070 We quite agree that if the valves can be moved out of centre, then all the cyl. nuts can be mude accessible to a box spanner with the induction pipe not in place. This is shewn schemed on the attached blueprint Lec. 2541 and we think it makes a light and simple job of the head. Moving the nuts does not produce the same result as they have to be moved a long way if the port facings are to be brought in as we desire. Lec. 2541 conforms to the standard xx crankchamber with but slight modifications to the central line of bolts only, which modifications need not affect the interchangeability of the casting. The uptake of the induction pipe has been inclined with the double object of keeping the carburetter as low as possible, and the uptake as long as possible. The uptake and weir pipe castings can be made in one piece if desired by cutting away the jacket to clear the induction pipe when assembling. The valve rockers are shortened from 2.750 to 2.500 but are still longer pro rata than we are using on Phantom. E.{Mr Elliott - Chief Engineer} | ||