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).
Design modifications to the wheelcase and gears for the Eagle XVI engine.
| Identifier | ExFiles\Box 46\1\ Scan101 | |
| Date | 14th May 1925 | |
| ~~X4114~~ X4101 To BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to CJ. RG.{Mr Rowledge} c. to HS.{Lord Ernest Hives - Chair} S E C R E T. E1/M14.5.25. EAGLE XVI. RE. WHEELCASE & GEARS. ~~X4114~~ X4101 We send you herewith drawings LeC.1993 and 2066., shewing the wheelcase and gears for the above engine. Since getting out these drawings we have decided that it was possible to reduce the outside dia. of the spring valve from 5" to 4 1/2". We have also modified the timing adjustment device on the magneto gear wheels. These 2 alterations would now enable us to push in the magnetos and magneto drives bodily .375" on each side of the engine, as indicated by the dotted line XX. in the end view of LeC.1993. We have been into the question to see what alteration this closing of the magnetos would entail to the bevel drive to the camshaft, and it merely means moving the inter-section of the camshaft drives with the vertical axis of the engine .3" further from the crankshaft centre, lengthening the wheelcase suitably up and down. Mr. Royce would like you to put somebody on to this job to redraw the scheme with the alteration to the position of the magnetos and bevel drives to the camshafts, as indicated, to save our time here, and then send the modified drawing to WW. We think there should be no trouble in carry-ing this out, and there should be no fresh design work involved. We are at the moment making a scheme for the details of the crankshaft spring drive, which will be sent in due course. It should be mentioned that the ears of the magneto flanges for which there are no stud holes are secured by a three legged clamp which is held on to the drive shaft housing stud extension by a nut. Particulars of this latter will be sent later. E.{Mr Elliott - Chief Engineer} | ||