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).
EAC engine weights, comparing the use of cast iron versus aluminium for the induction pipe and hot spot.
| Identifier | ExFiles\Box 3\2\ 02-page105 | |
| Date | 11th February 1924 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. RG.{Mr Rowledge} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} WOR.{Arthur Wormald - General Works Manager} c. to PN.{Mr Northey} +200 S E C R E T. Hs{Lord Ernest Hives - Chair}1/LG11.2.24. EAC. ENGINE WEIGHTS. X.9930 X.200 The weights given in our Hs{Lord Ernest Hives - Chair}2/LGS.2.24 of the EAC. engine included cast iron induction pipe and hot spot. This is the material they were originally instructed in. On the experimental car engines we are using aluminium induction pipe and hot spot. These are also fitted to 46-PK. The comparative weights are as follows :- Induction pipe and hot spot in cast iron - 22 lbs. 4 ozs. When made in aluminium - 9 lbs. 11 ozs. Saving - 12 lbs. 9 ozs. Referring to our Hs{Lord Ernest Hives - Chair}2/LGS.2.24. Under the carburetter section in the end column, we give an increase of 9.5 lbs. over the 40/50 HP. This should read - saving 9.5 lbs. This does not affect the totals as the weights are given correctly. Hs.{Lord Ernest Hives - Chair} | ||