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).
Successful identification of a double conical thrust bearing and comparing it to a less efficient Curtiss model.
| Identifier | ExFiles\Box 42\1\ Scan130 | |
| Date | 15th December 1925 | |
| To RG.{Mr Rowledge} } FROM R.{Sir Henry Royce} To BY.{R.W. Bailey - Chief Engineer} } c. to CJ. BJ. Hs.{Lord Ernest Hives - Chair} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} AJS. X3829 R3/M15.12.25. THRUST BEARINGS. X.3159 X.3829 X.3366 We have evidently found a good thrust bearing in the double conical type like New Departure, and our steering column, so that this item need cause us no further anxiety. It will be noted that of the three we have examined, Curtiss shew (on the drawing of their engine) the least efficient. We think their model would not stand up to the B. A.{Mr Adams} M.{Mr Moon / Mr Moore} test of 5 lbs. per HP. R.{Sir Henry Royce} | ||