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).
List of drawing numbers with titles and remarks on their status or necessary modifications.
| Identifier | WestWitteringFiles\R\October1927-December1927\ Scan149 | |
| Date | 21th December 1927 guessed | |
| (2) Drg. No. | TITLE. | REMARKS. LeC.2471. | Oil filter. | Cancelled. " 2472. | Slipper flywheel mods. | OK. " 2473. | Oil level indicator. | All information on this scrapped except small detail of front end of suction pipe. " 2474. | Magneto bracket. | Cancelled - Further drg. will be sent shewing magneto mounted on opposite side to steering. " 2475. | Magneto driving shaft. | Cancelled. " 2478. | Vacuum pump. | OK. in respect to vacuum pump only. " 2479. | Valve springs. | OK. " 2481. | Cyl. dowelling. | OK. except that water inlet is moved to steering side of engine on both blocks. " 2483. | Oil gallery pipe, fittings & relief valve. | OK. except that crankcase has been altered in dimensions and shape since. " 2484. | Oil gallery pipe. | OK. except that crankcase has been altered in width since drg. made. " 2485. | Engine suspension. (rubber blocks.) | Requires modifying to round rubber blocks as on EAC. 14. " 2486. | Duralumin bearing caps. | OK. except design requires modification to allow more draw for duralumin forging. " 2488. | Crankshaft & con rod. | It will be remembered that in memo. E1/M251127. we arranged for certain lengths & clearances for main bearings & bushes on the cranks. We adhere to this for EAC. 10. " 2489. | Con. rod banjo for LeC. 2488. | OK. " 2490. | 'Y' metal pistons. | Applies now to EAC. 14. only. " 2491. | Oil sump & filter. | OK. | ||