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).
Log of communications and test results concerning Dunlop wire wheels and brake systems.
| Identifier | ExFiles\Box 182\M18\ img097 | |
| Date | 22th September 1913 | |
| X2 DUNLOP DET WIRE WHEELS. 1st set adapted 22-9-13 6 D.R. Brakes 'light' drums - Springy out of round. Poor brakes. fouling of oil cover at Rep. Thicker ones OK. Wt diff - 3 lb 6 oz per wheel. DRB now being produced. ? was having drums in interim try V-lighter section. Against to delete pull. 30-9-13 (15-10-13) X2 Wer/Hy{Tom Haldenby - Plant Engineer} c J.R.By. No. DRB tested "070" plug. for a few days. 10 hrs usage. OK. 11-10-13 / 6-11-13 CJ to Wer 2700 Car quite unsuitable for these tests. The Balloon goes. F brakes poor at slow speed. OK at fast - meff 10-5mph. H make tests. 13-11-13 X2 Wer/HY{Tom Haldenby - Plant Engineer} 9am sorry ref to City or not? drums springing? Mort. press. needed then old central for good retardation? Tests Hy{Tom Haldenby - Plant Engineer} much sweeter. Tests Hy{Tom Haldenby - Plant Engineer} & old at 5mph if any diff it is in favour of DRB. Brake lims, col continues him of this. 29-11-13 CJ to Wer, Noise - DRB & old? Com was change over? foot brake noisy. Hand b. silent? (where b. silly suggestion). 21-12-13 CJ to Wer Dont Father R.{Sir Henry Royce} about noise & DRB. we've got to conquer. Exp to tackle it. 15-12-13 R to Da{Bernard Day - Chassis Design} Ref Brake alter. Complication not favourable. Nr V Smitten with Da{Bernard Day - Chassis Design}'n & Drop. 16-12-13 X2 Wer Hy{Tom Haldenby - Plant Engineer} I say we must exp. it to be better worse. Do you Intend to find out a cure. 17-12-13 R to By.{R.W. Bailey - Chief Engineer} & Wer: J.{Mr Johnson W.M.} Ref London info - Dist getting worse or making no way? All covers effecting? water flying in all direction and across drums. 18-12-13 X2 to J for R (42) Corners already turned. 24-12-13 R to B & C Wer. London Linings in "fudge". Off. on - London Showroom. Thank "u" it was put on - do quite thin. 22-1-14 B - A singlex. 9" wires Loared for Hy{Tom Haldenby - Plant Engineer} that thin rims did not report it. -- We learn this by accident. 27-1-14 Pls. Wer/Mer for HY{Tom Haldenby - Plant Engineer} Tests on 7 Cl samples @ Skiff. new shoes fitted. Exp about 600 miles. Little diff - Return good or bad?? exp -1500 miles. 27-4-14 PN{Mr Northey} to J to Wer. Latest DRB. Worried - disappointed. V.{VIENNA} dup to RR Std. Not consistent. F B noisy? effectual? 1) silent & ineffective (smiles silent by paraffin inj/n.) 2) effectual but noisy (it cleared quickly). 27-4-14 DRB My (JN) Lim. after 700m! Open Cruds car, 2,000 m.{Mr Moon / Mr Moore} Reports on rapid wear eg machined new shoes - 3,000 miles. In past expectation - 10,000 m ??? 27-4-14 Wor{Arthur Wormald - General Works Manager}/Mer not sent to J ?? Hy{Tom Haldenby - Plant Engineer} queries that car exp to lasted 19000 Has new N/s unit samples. tests an lin made & long or short life?. 28-4-14 Wor{Arthur Wormald - General Works Manager}/Mer not sent to J - not tried out? coined, margin nil. Bronze - good for silent OK for wear squeak sometimes Copper being - tested. 28-4-14 Wor{Arthur Wormald - General Works Manager} 4 page report to J.{Mr Johnson W.M.} ref Conference Wed. Pal. By.{R.W. Bailey - Chief Engineer} Hy.{Tom Haldenby - Plant Engineer} Hy{Tom Haldenby - Plant Engineer} ref noisy FB. 1) Noisy rapid wear may conceal - Test. ref micro. 2) New supplies? Debased metal. 3) ref Co report - Tm Churchward. bronze of 1/2 % load fatters them Cl. Exp - more silent. Squeak slightly. modfd 9 1/2 % lead cut deeper Cl/ske revets. 1) CA trials car. 4) Slow Speed traffic - Central and to more silent, but high speed, more trouble. Conference (efficiently) say DRF much more efficient. 5) recalculate them. 64RB{R. Bowen} - became efficient when Crawford. what did H do? Pd says' 64RBOK when left Wer. Exactly? or removal? [Red ink margin notes, left side]: X2 Wer & By Fully described and agreed on our visit to Coventry only a few weeks ago. CJ to Wer - brakes running-in they seem to be about equal in retarding power. R always more completely silent. L squeaks considerably when hot. 23-4-14 Reports on bronze brakes. R new shoes installed weekend. L new shoes 10 days older than R and has therefore more wear than R.{Sir Henry Royce} They are again now equal in silent action and retarding power. Both now squeak very slightly when hot. Da{Bernard Day - Chassis Design} says squeak comes from back plates not drums. [Red ink margin notes, right side]: R + By on Rover Car. Result of visit to Ferodo Works. Report from Care and later from their Drivers. This refers to Rover Car and is previous to RR tests. | ||