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).
Test report on a second pivot which broke, with suggestions for design improvements.
| Identifier | ExFiles\Box 2\12\ B002_X168-page156 | |
| Date | 14th August 1913 | |
| From Exp. Dept. Copies for: Mr Royce. Mr Johnson. Mr Day. Mr Hadin. For/Hy{Tom Haldenby - Plant Engineer}/4/114813. August 14th. 1913. Report on test of a second Pivot F.3372. - X.168 We have tested a second pivot of this type on the reversal test rig and a breakage occurred in an exactly similar manner to the previous one which we tested, i.e. the stub axle broke off sharp at the root. The breakage occurred after 41 1/2 hours running. This second test was made at the request of Mr Royce (in Mr Elliott's note from Le CanadelHenry Royce's French residence 61/8713), as Mr Royce thought there may be some defect in the metal. I think it advisable that the stub should be thickened up at the root. It also appears to me that the U section is heavier than is necessary, and it might have the effect of strengthening the whole job if this were lightened, as the strength in the whole thing would then be more uniform. | ||