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).
Bumping test of pivots, detailing failures and a subsequent reduction in bore size.
| Identifier | ExFiles\Box 2\B002_X168\ 00000001-page231 | |
| Date | 28th January 1914 guessed | |
| ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 470 (Four Lines). Names and indicating letter. A Mr. ADAMS By Mr. BAILEY B Mr. BARRINGTON Bd{Mr Berend} Mr. BEESEND Bu Mr. BURT C Mr. CHAMBERLAIN Cn{Mr Chamberain} Mr. COWEN Cx{Major Len W. Cox - Advertising Manager} Mr. COX D Mr. DeLOOZE Da{Bernard Day - Chassis Design} Mr. DAY E Mr. ELLIOTT F Mr. FRIESE G Mr. GNAPP Hy{Tom Haldenby - Plant Engineer} Mr. HALDENBY Hm{Capt. W. Hallam - Head Repairs} Mr. HALLAM H Mr. HANBURY J Mr. JOHNSON Js{Mr Johnson's Secretary} Mr. JOHNSON's Secretary K Mr. KILNER Mac{Mr Macintosh} Mr. MACINTOSH M Mr. MOON Ns{Norman Scott} Mr. NAGER No Mr. NORTHEY O Mr. OLDHAM P Mr. PATERSON Pl Mr. PLATFORD R Mr. ROBINSON Re Mr. ROYCE Rs{Sir Henry Royce's Secretary} Mr. ROYCE's Secretary Ja Mr. JAMES ROYCE S Mr. SANDERSON CHS LORD HERBERT SCOTT Sp{Mr Spinney} Mr. SPINNEY V - VIENNA Wa{Mr Wallis} Mr. WALLIS Whr{Mr Wheeler} Mr. WHEELER Wd{Mr Wood/Mr Whitehead} Mr. WHITEHEAD Wor{Arthur Wormald - General Works Manager} Mr. WORMALD Report on bumping test of pivots F3783/4 X168 The first is the one with the recess on the taper part of the stub axle and which has been standardised quite recently. A pair of pivots were run on 5" humps at 105 revs per min. The near side one broke after running 4 1/2 hours 6 min. The off side one has run 60 hours and is not yet broken. The first one broke off at the root of the stub. I think these tests are satisfactory and the pivot to be quite safe especially as the bore of the stub has been slightly reduced since the tests were made. The bore has been reduced from 1.35" to 1.342" This sheet must be filed with the correspondence to which it refers. | ||