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).
Note on roller bearing universal joints for airship engines, favouring the serrated type for light construction.
| Identifier | WestWitteringFiles\A\August1917\ Scan5 | |
| Date | 13th August 1917 | |
| To Da.{Bernard Day - Chassis Design} from R.{Sir Henry Royce} C. to J.{Mr Johnson W.M.} C. to HY.{Tom Haldenby - Plant Engineer} C. to EFC. ORIGINAL. R3/B10:8:17. 3 X.2143 - Roller Bearing Universal Joint for Airship Engines. It would appear that for light construction and small angles, universal joints of the serrated type are to be preferred, and if grease retaining, they appear to work better than one would expect. R.{Sir Henry Royce} D 13 AUG 1917 RECEIVED | ||