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 internal correspondence and annotations regarding brake system development and testing.
| Identifier | Morton\M18\ img106 | |
| Date | 25th August 1914 | |
| DRB (9) [Red ink: POLICY CRYSTALLISES** IN R's MIND] R.{Sir Henry Royce} to By.{R.W. Bailey - Chief Engineer} c Na.{Mr Nadin} Will Na{Mr Nadin} arr wk to control clutch hole - urgency - improvements needed. No pan m/c or retrospective action. As far as I can tell - Ferodo liners, BC for less leverage, wider faces drums & cooling ribs. By.{R.W. Bailey - Chief Engineer}'s silent, praises EP{G. Eric Platford - Chief Quality Engineer}'s experiment reports. (105) 29-7-14 [Red ink: Old Spotty News] R - CJ c By.{R.W. Bailey - Chief Engineer} I really regret By refused to put two--- Send him one of our BCD set. SAP. Spotting of oil on brakes. Ref Bill - 62 frcs - of Terycol for cleaning prices ?? (106) 30-7-14 [Red ink: OLLEY inventor already completed & issues to W.O? file] By for R.{Sir Henry Royce} Regrets R's mail - not justified. New tracks down, of which they sent a sketch. (107) 27-7-14 [Red ink: GINGER! A MISFIRED ROCKET!] CJ to Wor.{Arthur Wormald - General Works Manager} Definite info as to 1) Is prod car on 10,000 miles test? 2) If not, why not? To who responsible for alter'n? 3) What allowance for such changes? By writes on memo. exactly to prevent a recurrence of the same. Always a slight parachute possible but this will not affect gen'l statement. (108) 31-7-14 [Red ink, right margin: by Hy{Tom Haldenby - Plant Engineer} also R - Reply to Hy{Tom Haldenby - Plant Engineer} message down side] Wor{Arthur Wormald - General Works Manager}/Mcr. TG to By.{R.W. Bailey - Chief Engineer} explanation - Mr Goodwell says m/e (g) castings have not detected diff'y in mat'l. Our own inspected found no diff. in full testing (if Rockwell). We believe our iron is slightly more uniform & we are of a better grade of C.I. (109) 12-8-14 [Red ink: VERY SENSIBLE & DRAMATIC OUTER & IMPERIOUS MEMO.] CJ to Wor.{Arthur Wormald - General Works Manager} R seeks him go ahead full spd with 1) Will die pressed Ferodo liners. 2) Wide drums from steel forgings, cooling ribs. 3) Ample Froude pedal motion at least as per 58 NA.{Mr Nadin} [Red ink: This means more leverage Cwm] 4) Reduced leverage (does not match up with 3. Cwm). By could put in hand at once. If you see any reason why not? If not - let it be done. LET IT BE DONE. (110) 10-8-14 [Red ink: Daylight emerges on Dyno brake tests] Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer} Rep. on DRB. [Red ink: 2/3 key report of Hives Reports Tapes & Sheet ii] With OE straps 2" instead of 1 1/2". With OE pump m/c. 7 1/2" liners 2" full throttle 39 hp at hot. NS{Norman Scott} down in 3' gear at 20 mph. After 6 mins Straps bright red when shut down. So conducting heat. Drums & parts of copper visible flush, & Straps firmly distorted. By & Hy{Tom Haldenby - Plant Engineer} agree that this test exceeds anything on the road & cooling will be better on road. Distortion worse with iron & ferodo liners. R asked to hold off Thermoid & Raybestos tests pending promising Ferodo tests. Peculiarity - NS{Norman Scott} brake does more work in every case. (111 test, using 17-8-14) (112 Sheet ii 20-8-14) (113 Reply to (112) 21-8-14) [Red ink: Pleased but still in agony. Rites on testing.] Wor{Arthur Wormald - General Works Manager}/Mcr - R to Wor{Arthur Wormald - General Works Manager} for Hy.{Tom Haldenby - Plant Engineer} Suggests sincere joy. Pleasant to hear of endurance test on a pass. car at full throttle. Suggests Merc to be tested with its watercooled brake & our Std Central, c/o Delancey, Lanchester & any other you have to test. To find out length of time & power absorbed. R thought 5 or 6 mins in 4th at 20 mph full throttle is perhaps all we can expect. (114) 21-8-14 [Red ink: Brakes business of utmost importance] Wor{Arthur Wormald - General Works Manager}/Hy.{Tom Haldenby - Plant Engineer} R for Hy.{Tom Haldenby - Plant Engineer} Any dyno could be used (not necessarily the Heenan rig). Brakes of prime importance, any delay unreasonable. Summary of improvements met 5) Raising pedal plate with Alum brake shoes for footbrake & handbrake. 6) Trials with Alum shoes & Ferodo footbrake. 7) mods ... 8) trials... By c Hy{Tom Haldenby - Plant Engineer} to push expts. & make parts in duplicate & send to him for fitting to 58 NA{Mr Nadin} which ever runs far better than old central. (114) 21-8-14 [Red ink: TRIUMPHANT!] R to Hy.{Tom Haldenby - Plant Engineer} 24-8-14. By to send to him for fitting to 58 NA{Mr Nadin} Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer} (TC) C.J. R.{Sir Henry Royce} By.{R.W. Bailey - Chief Engineer} - Ns.{Norman Scott} 1926 tested on dyno - new C.I. (115) 25.8.14 [Right margin text]: J.Na.{Mr Nadin}By. Wor{Arthur Wormald - General Works Manager} R & J.Na.{Mr Nadin}By. | ||