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 specifications for various aero engine components.
| Identifier | Morton\M2.1\ img008 | |
| Date | 10th February 1919 | |
| To DA.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} -2- E1/G24318 Contd. The first pair of webs and main bearings should be like those on the "Condor". The rear pair of webs and main bearings should also be like the Condor. The crankshaft should have a loose tail similar to that shewn on our drawing of wheelcase and gears for the Condor, or else similar to the existing Falcon tail. This tail should carry the Falcon crankshaft pinion spring drive, as indicated. We are actually using the Eagle, but it will be necessary for you to use the Falcon for the sake of the wheelcase and gears. The milling of the crank webs near the crank pin should be a reproduction of the finished Condor. With regard to the main bearing bolts, we have found it necessary to make some alteration. We are now turning them in to studs with nuts on the bottom, the nuts being inserted in windows in the double webs, and screwed up therein. The distance from the face of the nut to the centre of the crankshaft, measured vertically, is approximately 4". Would you kindly arrange similar studs on the "V" engine for the main bearings. Would you also arrange separate windows if possible, for the cylinder studs in the cross wall of the crankcase, as on the 12-cylinder design. A single carburettor will be required for each cylinder. With regard to the crankcase, we think it will be necessary to fit a valve as used on large motorcycle engines. M E M 328 Y (100) J1(2C) HWY 10-2-19 C 1940 | ||