Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Query and response regarding the acceleration performance and pull-up distances of a 6.EX type car. | ||
| View original record | V8424. To Hs. & EP. from R. X.1725 X.3923 X.718. R1/M28.8.23. Perhaps one of you could give the information to say in what distance a car of the type of 6.EX could be pulled up from 15, 20 and 26… | ||
| scan0002 | Acceleration and braking tests for the 6-EX car. | ||
| View original record | To R. from Hs. c. to EP. X842 Hsl/LG29.8.23. ACCELERATION & BRAKING ON 6-EX CAR. X.3923. X.1725 X.718. Acceleration on 6-EX car between 20 and 30 m.p.h. is 2.5 ft. per sec. The distance in which the… | ||
| scan0003 | 4-wheel brakes and front axle control, detailing rig and road test results. | ||
| View original record | R.R. 493A (50M) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. 18420 REF. HS3/LG2. 3.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. S E C R E T. E. A. C. 4-WHEEL… | ||
| scan0004 | Graph plotting the average coefficient of friction and temperature of Ferodo bonded asbestos lining over a one-hour period. | ||
| View original record | AVERAGE CO-EFFICIENT OF FRICTION OF FERODO BONDED ASBESTOS LINING. SPEED & WORK CONSTANT WITH THE TEMPERATURE RISE FROM 70° TO 525° FAH, IN ONE HOUR. VALUE OF μ DEGS. FAHR. TIME MINS. TEMPERATURE F°… | ||
| scan0005 | The causes and characteristics of squeaking brakes on the 20 HP model. | ||
| View original record | H.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs1/LG17.4.25. X 8360 X4257 X4259 X8360 To R. from Hs. c.c. to CJ. BJ. c.c. to RG. L. c.c. to DA. BY. c.c. to Wor. 20 HP.… | ||
| scan0006 | Causes and potential cures for brake squeaking on various models. | ||
| View original record | H.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF JHD/LSK/7.4.25. [Handwritten: Known to be bad] [Struck through: the worst offenders] for squeaking are usually of this… | ||
| scan0007 | Investigating permanent cures for squeaking brakes, including consultations with Ferodo and testing dampers. | ||
| View original record | H.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: Hs1/LG17.4.25. all forms of bedding and although rebedding the brakes will always get rid of squeaks for a time, the… | ||
| scan0008 | Various methods tested to reduce brake squeaking. | ||
| View original record | R.R. 493a (50n) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF: He1/1/G17.4.25. (1) A plain steel band 1.5" X .125" pulled tightly round the drum. When used in conjunction with the… | ||
| scan0009 | Attempt to reduce brake squeak by using a strip of Ferodo. | ||
| View original record | To DA. from Hs. X8360 Hs3/LG22. 4. 25. BRAKE SQUEAKS. X4257 X8360 X3458 We have tried a strip of Ferodo as you mention was being used on Morris Cowley cars. We find that it does undoubtedly make an… | ||
| scan0010 | Standardisation report for a lightened front brake cam operating shaft to reduce wear on bushes. | ||
| View original record | RR 755 (10H) (SL391 2-11-23) MP 281297 X S.L.30 COMPLETED 11.5.25. STANDARDISATION of CHASSIS PARTS. Description of Parts. FRONT BRAKE CAM OPERATING SHAFT. Date 23.4.25. X No. 8420 Drawing No. Part… | ||
| scan0011 | Questioning why a suggested adjustable end for the 'V' Series front wheel brake pull rod was never adopted. | ||
| View original record | To BY. from DA. c. to Hs. EAC. ('V' SERIES) FRONT WHEEL BRAKES. X.8420 X.8940 Referring to the report from France that the front brake pull rod was difficult to adjust at the ball ends, we wonder why… | ||
| scan0012 | Decision between two different schemes for 'V' series front wheel brakes. | ||
| View original record | c. Hs. ----- "V" SERIES FRONT WHEEL BRAKES. ---------- Referring to De3/M.16.5.25, we agree that we had "N" scheme 1716 as you state, nearly eighteen months ago. It came of course at a time when we… | ||
| scan0013 | 4-wheel brake distribution and comparing braking figures for different configurations. | ||
| View original record | X8420 To Hs. from DA. c.c. to R. SECRET. DA2/M25.5.25. I N D I A. X.5940 X.8420 4-WHEEL BRAKES - BRAKE DISTRIBUTION. X.9940 X.9910 Referring to your Hs4/LG20.5.25., we should like to point out that… | ||
| scan0014 | Servo braking efficiency and its distribution in relation to vehicle weight. | ||
| View original record | contd :- -2- Incidentally in the instructions given in *Hsl/LG9.7.24. for testing the EAC.3. servo efficiency "it appears that the ratio of 3rd loads is expected "to come within the limits given on… | ||
| scan0015 | Secret memorandum detailing modifications for front brake adjustment and servo system calculations. | ||
| View original record | To BY. & Hs. from R. C. to CJ. BJ. Wor. S E C R E T RL/M10.6.25. INDIA & EAC. X.5940 X.8370 FRONT BRAKE ADJUSTMENT. X.5370 X.8420 DA. is sending through particulars of a simple modification to make… | ||
| scan0016 | The second page of a typed memorandum discussing the need to urge a rapid move once a decision is made. | ||
| View original record | contd :- -2- right as quickly as possible. Often we do not know what to do, but when we do we are forced to urge a rapid move towards it. R. | ||
| scan0017 | Experimental cover for brake drums to prevent mud and stone ingress, referencing a complaint from Patiala. | ||
| View original record | To BY. from DA.. c. to CJ. Hs. +8360 PATIALA. DA1/M21.7.25. X.3458 X.8360 With reference to BY9/H15.7.25., and Mr. Sidgreaves letter on the complaint from Patiala of the mud and fine stones getting… | ||
| scan0018 | Proposed design and material for a rear brake cover on the 40/50 HP chassis. | ||
| View original record | To BY. from DA. c. to CJ. Hs. 48360 DA2/M22. 7.25. 40/50 HP. REAR BRAKES. X. 8360 X. 3458 Replying to your BY8/H15.7.25., as in the case of the 20 HP. chassis, Mr. Royce would like to try a simple… | ||
| scan0019 | Customer complaints of a squawking noise from the rear brake drum due to small stones, proposing two experimental solutions. | ||
| View original record | X. 8360 To BY/TWD½ c. to Hs. BY15/H7. 8.25. 20 HP. AND 40/50 CHASSIS. REAR BRAKE DRUM COVER. X.5360 I am handing you herewith N.sch.2038 and 2039 showing proposals which have been put forward to… | ||
| scan0020 | Complaints of squeaking brakes on 40/50 and 20-HP cars, proposing a modification and cancelling previous instructions. | ||
| View original record | BY. c. Hs. 78420 EP5/H13.8.25. re. Squeaking Brakes. We have had one or two cases of complaints of squeaking brakes on 40/50 Front Wheel Brake cars, apart from the general complaint on the 20-HP cars.… | ||
| scan0021 | The effects of four-wheel braking and front axle rigidity on car control and steering safety. | ||
| View original record | R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. 48420 REF: HsJRml/LG7.9.25. To DA. from Hs/Rm. FOUR WHEEL BRAKING AND CAR CONTROL. 41559 From our experience the rigidity of… | ||
| scan0022 | Calculations and findings on steering moments and car behavior during turning and braking. | ||
| View original record | H.R. 493a (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF Hs/Rml/LC7.9.25. Suppose the car is to be trying to turn about O as the rear wheels cannot skid sideways. Then taking… | ||
| scan0023 | The effects of single front brake application on steering and the torsional movement of the axle. | ||
| View original record | H.R. 493a (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF. Hs/Rm1/LG7.9.25. It is therefore necessary to assigne some other reason for the steering taking charge when one front… | ||
| scan0024 | Phantom 4-wheel braking distribution, detailing modifications and performance on chassis 46-PK. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. 48420 EXPERIMENTAL REPORT. Expl. No. REF: Hs/T/317.9.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. PHANTOM - 4-WHEEL BRAKING. x8420… | ||
| scan0025 | Squeaking brakes on 40/50 HP & 20 HP models and potential remedies. | ||
| View original record | EP. c. to Hs. c. to BJ. BY6/H24.9.25. X.4257 X.8420 X.5940 40/50 HP. & 20 HP. SQUEAKING BRAKES. Referring to Tnn8/H23.9.25 from EP's dept. we are now in the position to deal with squeaking brakes on… | ||
| scan0026 | Difficulties getting duralumin pressings for the brake carrier, authorising a switch to an aluminium casting. | ||
| View original record | To BY. from DA. c. to XX Hs. 48470 DA1/M13.10.25. X.5940 X.8420 We understand from Hs2/LG10.10.25., that there is difficulty in getting duralumin pressings for the brake carrier. R. would like you to… | ||
| scan0027 | Issues with the 'Phantom' 4-wheel brake system, specifically poor friction on the equaliser link causing thumping. | ||
| View original record | R.R. 499A (50 H) (D.D. 31. 12-8-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8420 REF: HS9/LG14.10.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. 'PHANTOM' 4-WHEEL BRAKES. (5940… | ||
| scan0028 | The 8-EX car regarding duralumin brake carriers and front axle weight reduction. | ||
| View original record | R.R. 493a (50 H) (D.D. 31, 12-6-25) J.H.D. +8420 EXPERIMENTAL REPORT. Expl. No. REF: HS9/LGH.16.10.25. To R. From Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. 8-EX. 10,000 MILES IN FRANCE.… | ||
| scan0029 | Friction issues and modifications for the Phantom's four-wheel brake system. | ||
| View original record | X. 8420 To Hs. from DA. DA3/M22.10.25 PHANTOM FOUR WHEEL BRAKES. Referring to Hs9/LG14.10.25., we do not remember to have seen previously a report that you could not get sufficient friction out of the… | ||
| scan0030 | Suggesting an improvement to the 4-wheel brake system for Phantom and India models by altering the spring arrangement. | ||
| View original record | To Hs. from R. c. to CJ. BY. DA. +8420 R8/M24.10.25. 4-WHEEL BRAKES - PHANTOM AND INDIA. X. 8420 X. 5940 I have suggested that it is possible you will find an improvement in altering the arrangement… | ||
| scan0031 | Factors affecting the calculation of braking distances for the Phantom model. | ||
| View original record | X. 8420 To Hs. from DA. DA2/M31.10.25. PHANTOM BRAKING. We have recently had to supply Mr. Minchin with an expected summons at Epsom. We can of course calculate the distance with theoretical accuracy,… | ||
| scan0032 | Phantom braking performance, wheel locking, and the flywheel effect. | ||
| View original record | R.H. 498A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. X8420 REF: Hs/Rm1/LG2.11.25. To DA. from Hs/Rm. PHANTOM BRAKING. X8420 With reference to DA2/M31.10.25. We have found in… | ||
| scan0033 | The effect of pull off spring strength on brake thumping for the New Phantom 4-wheel brakes. | ||
| View original record | R.R. 498A (50 H) (D.D. 31, 12-6-25) J.H.D. Expl. No. +8420 REF: Hs/An2/LG4.11.25. EXPERIMENTAL REPORT. To DA. from Hs/Rm. NEW PHANTOM - 4-WHEEL BRAKES. With reference to DA3/M22.10.25. We find that… | ||
| scan0034 | Issue with brakes thumping and grabbing on the New Phantom Chassis. | ||
| View original record | Hs. from Mx. X8420 Mxll/T19.11.25. Brakes thumping and Grabbing. New Phantom Chassis. This is a point which is being raised on a number of Cars by EP. I would like to take an opportunity of… | ||
| scan0035 | Potential changes to the front wheel brake bedding process for the Phantom and 20 HP models. | ||
| View original record | Y8420 To RHC. from Hs/Rm. Hs/Rm/LG26.11.25. FRONT WHEEL BRAKES. We are meditating cancelling the effective brake bedding on the Phantom and the 20 HP. front wheel brakes and reverting to an even… | ||
| scan0036 | Inquiry regarding a report of twisted foot-brake brackets possibly caused by driver misuse. | ||
| View original record | To Hs. from Hm. c.c. to BY. [crossed out] [Handwritten]: Sirzo Hm/11/W3.12.25. We have a report from one of our outside men that the brake brackets on the Foot-brake had become twisted, and the… | ||
| scan0037 | Potential causes of a brake squeak on a Chassis 5-MC demonstration car during Barkers trials. | ||
| View original record | X8420 MX. c. EP. c. Hs. BY3/H. 4.12.25. ----------------- CHASSIS 5-MC. BARKERS TRIALS. --------------------------- It is extremely difficult to say just what the squeak is due to. The variation in… | ||
| scan0038 | History and faults of a front brake differential designed for the cancelled EAC.II chassis. | ||
| View original record | +8420 To Hs from RHC. RHC15/BE. 4.12.25. With reference to Da3/M. 26.11.25. in which he mentions the Front Brake Differential mounted on Clutch Casing. These parts were prepared and fitted to the… | ||
| scan0039 | Failure of the 20 HP brake brackets. | ||
| View original record | R.R. 493A (50 M) (D.D. 91, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8420 REF: Hs2/LG9.12.25 1/2 To Hm. from Hs. c. to EY. 20 HP. BRAKE BRACKETS. X8420 X8330 Hmll/W3.12.25. It is very difficult… | ||
| scan0040 | Mr. Minchin's legal case regarding vehicle stopping distances and brake performance. | ||
| View original record | To HS. from DA. +8420 DA1/M10.12.25. X. 788 X. 8420 X. 718 With further reference to Mr. Minchin's stopping distances, he tells us that he won his case, the defence being that the brakes were so good… | ||
| scan0041 | Replacement of leather covers with all-metal ones for rear brake countershafts. | ||
| View original record | 48360 BJ. c. Hs. BY7/H. 17.12.25. ALL-METAL COVERS FOR REAR BRAKE COUNTERSHAFTS. I note that Hs. has sent round a Standardization Sheet to be signed, standardizing the above pieces, in place of the… | ||
| scan0042 | Standardisation proposal for metal covers for rear brake adjustment. | ||
| View original record | RR 755 (10H) (DB130 12-9-24) MS 301225 STANDARDISATION of CHASSIS PARTS. COMPLETED 30.12.25. Date 10.12.25. Description of Parts METAL COVERS FOR REAR BRAKE ADJUSTMENT. Origin. To improve design.… | ||
| scan0043 | Front wheel brake failures caused by excessive oiling of the front pivots. | ||
| View original record | X8420 Hs. EP3/H6.1.26. re. Front Wheel Brake Failures. We have had one or two complaints of Front Wheel Brakes which have been found to be due to oil getting on same, and from the appearance of the… | ||
| scan0044 | Standardisation of modified dust covers for rear brakes to prevent stone and grit ingress. | ||
| View original record | RR 755 (10H) (SL391 2-11-23) MP 281297 STANDARDISATION of CHASSIS PARTS. +8360 COMPLETED 14.1.26. Date 10.12.25 Description of Parts. MODIFIED DUST COVERS FOR REAR BRAKES. Origin. To prevent small… | ||
| scan0045 | The issue of squeaking front wheel brakes. | ||
| View original record | To Hs. from BJ. . BJ4/H28.1.26. X8420 Squeaking of Front Wheel Brakes. I attach a copy of a memorandum from Bt. with reference to the above. Will you kindly let me know what is the present position in… | ||
| scan0046 | Internal correspondence regarding the urgent issue of squeaking front wheel brakes (F.W.B.) and potential solutions. | ||
| View original record | COPY. To BJ from Bt. 27th January 1926. Squeaking of F. W. B. This matter brought forward in St's memo. attached is, I think, rather urgent. My experience is that the "cures" at present recommended by… | ||
| scan0047 | Issue of squeaking front brakes on Phantom cars and potential solutions. | ||
| View original record | To BJ. from Hs. 78420 Hs2/LG30.1.26. SQUEAKING FRONT BRAKES. There is no scheme yet for dealing with squeaks on front brakes of Phantom cars. This is a matter which will have to be taken up with the… | ||
| scan0048 | Specific cars experiencing squeaks from their front wheel brakes. | ||
| View original record | S/W. HS. from Bt. X8420 Bt2/EP/2.2.26. re:- Squeaks from Front Wheel Brakes. BJ. tells me that you wish to have a note of some cars on which we have noticed the front wheel brake squeaks. Two of our… | ||
| scan0049 | Proposing a new design for automatic brake adjustment. | ||
| View original record | To DA. BY. FROM R. Hs. LE CANADEL. c. to CJ. BJ. Wor. c. to RG. Mr. Claremont. X8420 R1/M8.2.26. BRAKES ADJUSTMENT. X. 8420 X.5940 It is possible, and I think practical, to make all six brakes on a… | ||
| scan0050 | Extract from the Sales Conference minutes about the issue of squeaking front brakes. | ||
| View original record | S/W Hs. X8420 CG/08.2.26. Squeaking Front Brakes. ------- The following is extract from the Minutes of the Sales Conference held on the 2nd inst:- "A report from Hs. was read, saying that the Works… | ||
| scan0051 | Semi-automatic brake adjustment mechanism using a ratchet device. | ||
| View original record | HS. ) FROM R. To DA. ) LE CANADEL. BY. ) c. to CJ. BJ. RG. c. to E. Mr. Claremont. /X8420 (handwritten) R4/M19.2.26. BRAKES - SEMI-AUTOMATIC ADJUSTMENT. X.8420 X.8360 This is more practical than… | ||
| scan0052 | Patented friction scheme for four-wheel brakes, its ineffectiveness, and potential alternatives. | ||
| View original record | X8420 C. Hs. BY3/H. 2/3.26. We have received a letter from R/R. of A. Inc. in connection with the user of four wheel brakes. We took out a patent based on N.Sch. 1860 for the addition of friction to… | ||
| scan0053 | Patent for friction in suspension links and modifications to the New Phantom brake linkage. | ||
| View original record | To BY. from DA. c. to Hs. X8420 DAL/M4.3.26. PATENT FOR FRICTION IN SUSPENSION LINKS - 4 WHEEL BRAKES BALANCING GEAR. X.8420 X.5940 ------------------ Replying to BY3/H2.3.26., we have an instruction… | ||
| scan0054 | Mr. Royce's instructions for adapting the EAC.7 double rear brakes. | ||
| View original record | To BY. from DA. c. to CJ. Hs. X 8366 DA3/M/11.3.26. EAC.7. DOUBLE REAR BRAKES. X. 8360 X. 7360 Mr. Royce has said that the first EAC.7. should be fitted with the existing New Phantom rear brakes. This… | ||
| scan0055 | Complaints of squeaking brakes on the 'New Phantom' and 20 HP models. | ||
| View original record | X8420 CWB5/DN19.3.26. TO Hs FROM CWB Complaints of squeaking brakes are becoming very common both in the case of the "New Phantom" and 20 H.P. Are you able to state the exact causes of this and is… | ||
| scan0056 | Causes and potential solutions for squeaking brakes. | ||
| View original record | To CWB. from Hs. X8420 Hs1/LG22.3.26. SQUEAKING BRAKES. X5940 X8420 We are not able to state the exact cause of squeaking brakes. We know of a number of causes but we do not know of any means of… | ||
| scan0057 | Extract from the Sales Conference minutes regarding squeaking brakes on the 40/50 and 20 HP models. | ||
| View original record | X. 8420 To Hs. BY. C2/C25.3.26. SQUEAKING BRAKES. X. 5940 At BJ's request, I give you the following EXEC extract from the Minutes of the Sales Conference re. the above:- "Attention was drawn to the… | ||
| scan0058 | Following a Sales Conference discussion about the effectiveness of a damping device on squeaking front brakes. | ||
| View original record | S/W Hs X.8420 C2/B31.3.26, Re Squeaking Brakes. Hsl1/LG26.3.26. This matter we discussed at the Sales Conference yesterday, and the opinion was that the damping device had effected a big improvement… | ||
| scan0059 | Recommendation to manufacture rear brake operating shaft covers from steel instead of aluminium due to damage. | ||
| View original record | To Hs from RHC. C PY X8360 RHC2/BE. 8.4.26. RE IMPROVED COVERS FOR REAR BRAKE OPERATING SHAFTS Covers G.73657-G.73662 which were removed from the Operating Shafts on 8.EX. Rear Axle were badly damaged… | ||
| scan0060 | Instruction to change the material for metal covers on rear brake operating shafts from aluminium to mild steel. | ||
| View original record | Y8360 BY/T.M.D. c. Hs. c. PHS. BY5/H. 13.4.26. RE METAL COVERS ON REAR BRAKE OPERATING SHAFTS. I wish to confirm my verbal instructions that covers G.73657 and G.75662 should be produced in mild steel… | ||
| scan0061 | Experiments to overcome squeaking front brakes by treating brake linings with different compounds. | ||
| View original record | To R. from Hs/Rn. c. to BJ. RG. c. to E. Da. c. to BY. Wor. X8420 Hs/RnL/LG17.4.26. SQUEAKING FRONT BRAKES. X3409 We have in hand some experiments with a view to overcoming this trouble. We know that… | ||
| scan0062 | Test report on a 40/50 HP chassis regarding oil leaking from the front pivots onto the front wheel brakes. | ||
| View original record | X8420 BY. c. Hs c. MX. EP8/H28.5.26. [STAMP: RECEIVED 28 MAY 1926 Hs] re. 40/50 HP. Front Wheel Brakes and oil getting on same from front pivots. During a recent test of about 250 miles with a new… | ||
| scan0063 | Characteristics of new Ferodo brake material under various conditions like heat, moisture, and rust. | ||
| View original record | To Hs. from R. c. to BJ. BY. X8420 R17/M10.6.26. RE. BRAKE MATERIAL. X.3409 X.4111 X.8420 (1) With regard to the new ferodo material E. wonders whether it will alter its characteristics after becoming… | ||
| scan0064 | Issue of squeaking brakes on cars with a new lightened axle and proposing solutions. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. BY. c. to RG. DA. X8470 Hs3/LG21.9.26. SQUEAKING BRAKES. X7470 We are rather concerned with the fact that we have had more front brake squeaks on cars fitted… | ||
| scan0065 | Complaint regarding an objectionable noise or slap when the footbrake is released on model chassis. | ||
| View original record | X8420 Mx. - from Wor. WD. " " Hs. " " RY. " " Wor21/M13/10/25. Commander Briggs was complaining yesterday that on both our model chassis there is an objectionable noise, or slap, when the footbrake is… | ||
| scan0066 | Scheme to fit dampers to front brake drums to eliminate squeaking. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. RG. c. to DA. BY. X8420 SQUEAKING BRAKES. X7420 We consider it is important that we should have a scheme for fitting dampers to the front brake drums with the… | ||
| scan0067 | Issues with front brake shoe rattle on the 'Phantom' model. | ||
| View original record | X8420 Copy to Hs. from Mx. Front Brakes. "Phantom" We experience quite a lot of trouble on test with rattle of front brake shoes. While this does not appear to be apparent on the road, we feel that it… | ||
| scan0068 | Explaining why new, lighter front brakes fitted to axle G.74294 are prone to squeaking and the proposed solution. | ||
| View original record | To R. from Hs/GWH. c. to BJ. Wor. c. to RG. E. c. to DA. BY. +8420 Hs/GWH1/LG25.10.26. WHY THE NEW TYPE FRONT BRAKES FITTED TO AXLE G.74294 ARE MORE PRONE TO SQUEAK X7420 THAN THE PRESENT STANDARD.… | ||
| scan0069 | Summary of tests to overcome squeaks from front brakes fitted to a 12-EX model. | ||
| View original record | To R. from Hs/GWH. c. to BJ. Wor. c. to RG. E. c. to BY. DA. SUMMARY OF TESTS CARRIED OUT TO OVERCOME SQUEAKS FROM FRONT BRAKES FITTED TO 12-EX. We have been able to damp out all normal squeaks by… | ||
| scan0070 | Alterations to Phantom front brakes to prevent rattle, which also applies to the 20 HP model. | ||
| View original record | To EY. from Hs/GWH. c. to Wor. X8420 Hs/GWH/LG3.11.26. PHANTOM - FRONT BRAKES. Mx2/T22.10.26. X7420 EY. has instructed the following alterations to the brake shoes to prevent rattle. Dia. of guide… | ||
| scan0071 | Instruction note regarding Phantom leather covers for brake and cross steering joints. | ||
| View original record | RR 26 [10H BKS.] [DA944 5-7-24] MP 297056 X8470 ROLLS-ROYCE LTD. INSTRUCTIONS To: HS/RM Date: 13-11-1926 Order No. Customer's No. Phantom leather Covers for Brake & Cross Steering Joints. Copy of memo… | ||
| scan0072 | Causes and potential cures for squeaking brakes, including dampers, brake liners, and bedding. | ||
| View original record | To Hy. from Hs/Rm. c. to WOR. X8470 Hs/Rm5/LG19.11.26. SPRINGFIELD. QUESTION 24. X3409 With reference to Hy36/W16.11.26. We have no definite cure for squeaking brakes. The best palliative which we… | ||
| scan0073 | Problem of squeaking brakes on the 40/50 HP model, exploring solutions like rigid drums and their side-effects. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY? X 8470 Hs/Rm2/LG23.11.26. 40/50 HP. - SQUEAKING BRAKES. X7470 Whilst we believe that satisfactory drum dampers will do a great… | ||
| scan0074 | Modifications required for sample leather covers for brake and cross steering joints on the Phantom model. | ||
| View original record | MADE AT CROXLEY To EY. From Hs/GWH. c. to EY/TWD. X8470 Hs/GWH/LG23.11.26. PHANTOM - LEATHER COVERS FOR BRAKE & CROSS STEERING JOINTS. X8475 Replying to EY/TWDL/GK19.8.26. We have tried sample covers… | ||
| scan0075 | Requesting a test drive of a car with an experimentally modified four-wheel braking ratio. | ||
| View original record | S/W. To Hs. X8420 PN4/EH.30.11.26. Copy to BJ. Wor. By. Da. CWB. Four Wheel Braking and Steering. When you have a car in which the four wheel braking has been modified experimentally to the ratio of… | ||
| scan0076 | Proposing to alter the braking distribution on a familiar car by fitting two new levers. | ||
| View original record | To [REDACTED] from Hs/Rm. C. to [REDACTED] Wks. C. to [REDACTED] D.H. C. to [REDACTED] X8470 Hs/Rm2/LGL.12.26. FOUR WHEEL BRAKING AND STEERING. X8430 With reference to PN4/EH30.11.26. We consider that… | ||
| scan0077 | Instructions to overcome squeaking from front brake drums on the C.Z. Series, including modifications to cross steering levers. | ||
| View original record | X8420 Hs BY/TWD. Sft. C. Hs. BY6/H. 8.12.26. RECEIVED DAMPING OF FRONT AXLE FRONT BRAKE DRUMS TO PREVENT SQUEAKING. ------------------------------------------ We are instructed by the Experimental… | ||
| scan0078 | Proposed alterations to the 40/50 braking system, with a table comparing braking percentages for different schemes. | ||
| View original record | To R. from Hs/Rm. c. BJ. Wor. Dat. c. Rg. E. By. c. Ov. 48420 Hs/Rml/T9.12.26. 48370 REDUCED FRONT BRAKING. We are sending you a graph of the proposed alterations to the 40/50 braking. In our opinion… | ||
| scan0079 | Standardisation Sheet to reduce front-wheel braking on the Phantom model by modifying lever lengths. | ||
| View original record | S/W. To Hs, X8480 PN1/EH.11.12.26. With regard to the Standardisation Sheet X No. 8430 and 8420 with a view to reducing the relative amount of braking on front wheels of the Phantom, I should like to… | ||
| scan0080 | The despatch of two levers to Mr. P. Northey for an experiment. | ||
| View original record | To BP. from Hs/Rm. c. to Mt. X8420 Hs/Rm4/LG13.12.26. We are sending into the Stores for despatch to Mr. P. Northey, Conduit St. :- 2 levers G.75413. These levers are being sent to enable an… | ||
| scan0081 | Graph and calculations comparing brake distribution for the 40/50 model, showing old, new, and proposed setups. | ||
| View original record | 40/50 BRAKE DISTRIBUTION OLD X₁ = 1.06y NEW X₂ = .800y Diagram labels: y, 2.00, 2.625, 2.05, 5.8, 7.85, x X₁ = y x 2.625/.544 x 3/1 x 5.8/2.05 x 1/3.925 = 1.06y X₂ = y x 2.00/.544 x 3/1 x 5.8/2.05 x… | ||
| scan0082 | Sending two levers to reduce front braking. | ||
| View original record | To PN. from Hs/Rn. X8420 Hs/RmL/LG13.12.26. With reference to PN1/EH11.12.26. We are sending you under separate cover - 2 levers to reduce the front braking. This levers should be fitted on the front… | ||
| scan0083 | Adjustments to brake distribution and servo assistance for 40/50 & 20 HP models to improve safety. | ||
| View original record | Y8470 To Hs. from R. c. to BJ. R1/M13.12.26. 40/50 & 20 HP. BRAKE DISTRIBUTION. X. 8420 X. S420 X. 8370 The object of my suggestion re. the above was :- (1) To decrease the risk of steering taking… | ||
| scan0084 | Test results for dampers on front brake drums. | ||
| View original record | BY. from Hs. X8420 Hs2/LG22.12.26. C.2. SERIES - DAMPERS ON FRONT BRAKE DRUMS. X8420 K4612 Replying to BY15/H20.12.26. From our test we believe that the .025" shoulder will be sufficient to keep the… | ||
| scan0085 | Incorrect brake levers sent for cars not fitted with a lightened axle. | ||
| View original record | W/S. To PN. from Hs. c. to CWB. X8420 Hs4/LG31.12.26. REDUCED LEVERAGE TO FRONT BRAKES. X8420 X8430 We are sorry that the levers which we sent you are not suitable for your cars, they can only be used… | ||
| scan0086 | Part changes for the front brake equalizing mechanism on 40/50 Chassis (Phantom) & Silver Ghost models. | ||
| View original record | To RHC c HS/Rm X8330 BY/TWD1/GK 3/1/27 S-S 11-1-27 40/50 CHASSIS (PHANTOM) & SILVER GHOST. FRONT BRAKE EQUALIZING MECHANISM SECTION 6151 "N" SCHEMES 1717 & 1752 Please receive herewith one blue print… | ||
| scan0087 | Sending two levers to be fitted to a trials car to test reduced front braking. | ||
| View original record | To PN. from Hs/Rm. X8470. Hs/Rml/LG5.1.27. We are sending to you 2 levers to be fitted in place of C.72013/4 on the front brake equaliser shaft in order to reduce the front braking on the car having… | ||
| scan0088 | Dispatch of two levers to be fitted to a demonstration car at no charge. | ||
| View original record | To BP. from Hs/Rm. c. to Mt. X8470. Hs/Rm2/LG5.1.27. We are sending into the Stores to be despatched to PN. Conduit Street :- 2 levers. There is no charge as these levers are to be fitted to a… | ||
| scan0089 | The standardisation sheet for reduced front braking and levers sent for trial. | ||
| View original record | To PN. from Hs. c. to CWB. X8420 Hs5/LG17.1.27. X8420 We are very anxious to clear up the standardisation sheet for the reduced braking on the front. 10 days ago we sent to you a pair of levers which… | ||
| scan0090 | Standardisation of chassis parts for a front brake drum damper to reduce brake squeaks. | ||
| View original record | RR 755 REVISED (10H) (DE 444 6-10-26) BM. COMPLETED 19.1.27 Handwritten number: 48420 STANDARDISATION of CHASSIS PARTS. Date 10.12.26 X No. 8420 / 4612 Drawing No. N.sch. 2298 Part List Description of… | ||
| scan0091 | Requesting feedback on the mileage and satisfactory performance of front brake drum dampers. | ||
| View original record | To Hs. from BJ. Standardisation Sheet. Front Brake Drum Damper. With reference to the attached Standardisation Sheet, please let me know the mileage these brake drum dampers have now run and whether… | ||
| scan0092 | Telegram message concerning the testing and approval of modified levers. | ||
| View original record | POST OFFICE TELEGRAPHS No. 0134 Office Stamp DERBY 19JAN27 X8420 RECEIVED At 11.30 M 12 11.2 LONDON R 21 HIVES ROYCAR DERBY = REFERENCE REDUCED BRAKING HAVE TESTED ONE HUNDRED AND THREE MC WITH… | ||
| scan0093 | Confirmation of approval for tested modified levers on vehicle 103-MC, acknowledging a compromise resulting in a 7% reduction in braking effectiveness. | ||
| View original record | S/W. To Hs. X8420 PN1/EH.19.1.27. Copy BJ. CHD. I beg to confirm that I wired you this morning as follows :- "Reference reduced braking, have tested 103-MC with modified levers, and we approve." This… | ||
| scan0094 | Standardisation sheet detailing the performance of brake drum dampers on experimental cars. | ||
| View original record | To BJ. from Hs. X8420 Hs2/LG20.1.27. STANDARDISATION SHEET X. 8420. BRAKE DRUM DAMPER. Replying to BJ9/E19.1.27. One set of these dampers have run 2500 miles on 7-EX car - another set has run 4500… | ||
| scan0095 | Requesting road test results for an alteration intended to reduce front braking. | ||
| View original record | 78420 To Hs. from BJ. Standardisation Sheet. To reduce Front Braking. BJ1/E21/1/27 Referring to the attached, please let me know what test this alteration/ to braking has had on the road by now and… | ||
| scan0096 | Standardisation sheet regarding the successful testing of a reduced front braking scheme on various experimental cars. | ||
| View original record | To BJ. from Hs. 48420 Hs3/T24.1.27. STANDARDISATION SHEET FOR REDUCED FRONT BRAKING. Replying to BJ1/E2b.1.27. This scheme has run 2500 miles on 7-EX car. The reduced leverage has also been tried on… | ||
| scan0097 | Alteration to part G.73149, increasing its length from 3.00' to 4.00' to reduce front braking. | ||
| View original record | RR 755 REVISED (10H) (DE444 6-10-26) BM. STANDARDISATION of CHASSIS PARTS. X 8420 COMPLETED. 25.1.27. Date 9.12.26 Description of Parts. ALTERATION TO G.73149. ORIGINAL LENGTH 3.00. PROPOSED LENGTH… | ||
| scan0098 | Load tests and design recommendations for front wheel brake torsional pull-off springs. | ||
| View original record | Y8420 To BY. from Hs/Rm. Hs/Rm3/LG31.1.27. FRONT WHEEL BRAKES. TORSIONAL PULL OFF SPRINGS. Y8420 X7420 From tests we have carried out we find that a load from 9 to 9 1/2 lbs. at the extremity of lever… | ||
| scan0099 | Stress limits and reliability of front wheel brake pull-off springs. | ||
| View original record | X8420.? HS. G-BY/TWD BY10/H. 10.2.27. [STAMP: RECEIVED FEB 10 1927] FRONT WHEEL BRAKES. - PULL-OFF SPRINGS. Referring to Hs/Rms/LG.31.1.27. I am very doubtful indeed of putting any springs into… | ||
| scan0100 | Fault in the 40/50 HP servo brake mechanism involving the front equaliser shaft and swinging link, leading to brake snatching. | ||
| View original record | To BY. } FROM HS/RM. To DA. (Handwritten) 8470 Hs/Rm5/LG11.2.27. 40/50 HP. SERVO. (Handwritten) X8370 (crossed out) (Handwritten) X8420 CWH. has pointed out a difficulty on the 40-50 HP. servo with… | ||
| scan0101 | Instructing a reduction in front braking on experimental 40/50 HP cars and a check on hydraulic dampers. | ||
| View original record | To RHC. from Hs/Rm. [Handwritten]: X8420 Hs/Rml/LG28.1.27. [Handwritten]: X8420 X235 Will you please arrange for the front braking to be reduced on all experimental 40/50 HP. cars as opportunity… | ||
| scan0102 | Continued memorandum discussing a toggling issue with a brake linkage and proposing a solution involving a stop. | ||
| View original record | contd :- -2- The trouble did not occur on 'V' series because by good fortune the jaw of the rod from r. to the front brake equaliser shaft provided a stop by toggling. It is no use putting a stop on… | ||
| scan0103 | Failure to adhere to a 10 lbs load specification for a lever and the resulting stress issues requiring modification. | ||
| View original record | To BY. from Hs/Rn. XG 400 ? 78030 Hs/Rnl/LG11.2.27. With reference to BY?/H10.2.27. It is unfortunate that our original specification of 10 lbs. at the end of this lever was not adhered to by WW. when… | ||
| scan0104 | Proposing a sheet metal addition to the Phantom front brake differential to prevent cable slack. | ||
| View original record | X. 8420 To BY. from DA. DA1/M14.2.27. c. to Hs. PHANTOM - FRONT BRAKE DIFFERENTIAL. Herewith we send N.sch. 2362 shewing the proposed sheet metal on the front brake differential to prevent the front… | ||
| scan0105 | Front track, wheel lean, and decision not to widen the wings on the 10-EX model. | ||
| View original record | To Hs/Rm. from DA/EV. 18420 DA/EV2/M15.2.27. RE. 10-EX. X. 8774 X. 8420 We thank you for your Hs/Rm2/LG9.2.27. and note that the front track will be 58". Since however the lean of the wheel from the… | ||
| scan0106 | Over-efficiency of new front axle brakes, caused by using old-style bedding on the shoes. | ||
| View original record | To BY. from Hs/Rm. X8420 Hs/Rn2/LG24.2.27. In our Hs/Rn5/LG7.10.26 we asked you to arrange for the brakes of the new type front axle to be bedded concentrically. One reason for this is that the front… | ||
| scan0107 | Correcting a misunderstanding about front brake shoe bedding for the Phantom model, attaching a blueprint for the correct procedure. | ||
| View original record | To BY. from Hs/Rm. +8420 Hs/Rm4/LG25.2.27. PHANTOM - FRONT BRAKE BEDDING. We believe we were in error in stating that the Works were not bedding front brake shoes concentrically, being mislead by… | ||
| scan0108 | Recommending the fitting of a stop to the front brakes for cars with the new axle. | ||
| View original record | To BY. from Hs. c. to Wor. 48470 Hs/LG3.3.27. STOP FOR FRONT BRAKES. 48470 48330 In our report Hs/Rm5/LG11.2.27. we pointed out the necessity of a stop on the front brakes on cars with the new axle.… | ||
| scan0109 | 'Phantom Braking' issues caused by overly efficient front brakes and weak springs. | ||
| View original record | X6470 To BY. from Hs/Rm. c. to MX. c. to Hm. c. to EP. HS/Rm2/LG4. 3. 27. PHANTOM BRAKING. Trouble has been experienced on two cars in the Test Dept. fitted with the new type axle due to the cross… | ||
| scan0110 | Suggestions to reduce sponginess and increase stiffness in the EAC.7 brakes. | ||
| View original record | To BY. Hs/Rm. from DA. c. to BJ. 78420 DA8/M25.3.27. EAC.7. BRAKES. X.7420 X.8420 We have gone into the question of reducing the sponginess on the EAC.7. brakes, and send herewith N.schs. 2384/5… | ||
| scan0111 | Design and effectiveness of brake squeak dampers for the 20 HP and Phantom models. | ||
| View original record | To BY. from DA. c. to Hs. +8420 DA3/M7.4.27. BRAKE SQUEAK DAMPERS. X.4612 X.5420 X.8420 With reference to R's comment that the squeak damper should be narrow, and fitted into a broad groove, the… | ||
| scan0112 | Silent brake stop for the 40/50 HP foot brake levers, proposing a trial with a Ferodo strip on chassis 12-EX. | ||
| View original record | To RHC. from Hs/Rm. 48360 X719 Hs/Rm3/LG28.4.27. Herewith a sketch of a ~~the~~ silent brake stop for the 40/50 HP. foot brake levers on the rear axle. In addition to the stop shewn we should like to… | ||
| scan0113 | Issues with the brake servo system and a proposed solution involving a spring thrust collar. | ||
| View original record | To BJ. from R. c. to OY. Hs. c. to BY. EP. 78470 R 5/M29.4.27. BRAKES. X. 8370 X. 8420 X. 5370 X. 5420 It should be thoroughly understood that the present servo is not perfectly satisfactory unless… | ||
| scan0114 | Front brake snatch, the servo shaft, and the condition of brake linings on F.W.B. axles. | ||
| View original record | To Hm. from Hs/Rm. X8420 Hs/Rm3/LG10.5.27. BRAKES. X8420 X8370 With reference to R5/M29.4.27 attached. The flexibility in the servo shaft is undoubtedly a great asset in ensuring smooth brake… | ||
| scan0115 | With diagrams detailing modifications to an axle and wheel setup for high-speed wobble tests. | ||
| View original record | To RHC. from Hs/Rm. X8470 Hs/Rml/LG12.5.27. HIGH SPEED WOBBLES. X457 We have the following work we should like to do in connection with these tests. (1) Remove present axle and pivots from 98-NK and… | ||
| scan0116 | Note suggesting a fix using lengthened studs and solid packing. | ||
| View original record | HS/Em. Lengthened studs and a good solid packing piece should do the job. (1) (2) (3) Wheel tests in 30 (4) (d) REVIEWED CERTIFICATED | ||
| scan0117 | Drawing N.sch.2447 for a clutch and clutch brake, noting its use with an integral gearbox and alterations to the crankcase and crankshaft. | ||
| View original record | BY. from DA. c. BJ. Hs. 78420. DA2/M17.9.27. EAC.10.& 12 CLUTCH (CLUTCH BRAKE) X. 8300 X. 8420 Herewith we send N.sch.2447 shewing the clutch and clutch brake for the above car. This clutch is… | ||
| scan0118 | Issues with flexible front brake drums and proposing a new scheme for more rigid drums with dampers for the Phantom model. | ||
| View original record | To DA. from Hs/Rm. X8450 Hs/Rml/LG17.9.27. 10-EX - FRONT BRAKES. X8774 On the sports car we intend to increase the front braking. At the present moment the very flexible drums allow a lot of lost… | ||
| scan0119 | Replacing the suggestion for a duralumin rear axle brake bracket with using the entire EAC rear brake assembly. | ||
| View original record | BY. Hs. from R. c. .to BY. Wer. X8420 R2/M6.10.27. RE. MAKING REAR AXLE BRAKR BRACKET IN DURALUMIN. X. 8420 X. 8350 Replying to your BY3/J4.10.27., this suggestion has been replaced by my suggestion… | ||
| scan0120 | Revised rear brake gear for the Phantom Sports car, based on EAC.7 brakes. | ||
| View original record | BY. from DA. c. to BJ. Hs. (8360 DA3/M8.10.27. PHANTOM SPORTS. X. 8360 X. 7360 Herewith we send N.sch.2472 shewing the revised rear brake gear for the above car on the lines of the EAC.7. brakes. So… | ||
| scan0121 | Operation and components of the braking system, specifically the Tee-equalizer arm. | ||
| View original record | X8420 OY2.R.102527 October 15th, 1927. TO Mr. Caswell Mr. Ainsworth Mr. Soutter cc - Mr. Bagnall Mr. Nadin Mr. Burton Mr. Poole cc H Mr. Bailey Mr. Hives RE: BRAKES Regarding my note OY4.R.10527… | ||
| scan0122 | Technical description of the front brake and servo system operation, including deductions on brake release. | ||
| View original record | 2 FRONT BRAKE SYSTEM Consists of rod from bottom of T-equalizer to front-brake equalizer, the front brake equalizer itself, brake ropes, levers and shafts on axle, and operating mechanism on brakes.… | ||
| scan0123 | Effects of suspension arm friction on front and rear brake operation. | ||
| View original record | - 3 - (3) EFFECT OF SUSPENSION ARM FRICTION ON OPERATION OF FRONT AND REAR BRAKES: Maintenance reports that much friction in the suspension arm causes the rear brakes to engage first and the front… | ||
| scan0124 | Drawing showing the various positions of a servo system's suspension arm. | ||
| View original record | DRAWING NO. SK 122 SEE ALSO THE FOLLOWING OPERATION DRAWINGS FORWARD POSITION OF SUSPENSION ARM NO SLACK HERE SLACK HERE EXTREME POSITIONS WITH BRAKES ON (AS SHOWN BELOW) POSITION OF SUSPENSION ARM… | ||
| scan0125 | Schematic layout of a complete braking system, including front, rear, servo, and foot pedal components. | ||
| View original record | DRAWING NO. SK 121 SEE ALSO THE FOLLOWING OPERATION DRAWINGS LAYOUT OF COMPLETE BRAKING SYSTEM SPRING HOLDING PEDAL AGAINST STOP PICK-UP SHAFT REAR BRAKE EQUALISER REAR AXLE "PULL-OFF" SPRINGS REAR… | ||
| scan0126 | Modification to reduce front braking on 40/50 HP cars, citing issues caused by Australian roads. | ||
| View original record | To Pt. from Hs/Rm. X8420 Hs/Rm3/LG17.10.27. REDUCED FRONT BRAKING. X8420 X8990 I believe we told you when you were over here that a standardisation sheet had been completed for reducing the front… | ||
| scan0127 | Accidents in Australia caused by fierce front braking on unmetalled roads and the recommended corrective action. | ||
| View original record | To Hm. from Hs/Rm. Y8420 Hs/Rm1/LG17.10.27. AUSTRALIAN ACCIDENTS. We observe that at least two of the accidents recorded by Pt. can be attributed to the steering taking charge through the front wheel… | ||
| scan0128 | Letter regarding depot reports on brake servo system adjustments and an attached memo for review. | ||
| View original record | X8420 W/NS [STAMP: RECEIVED 27 OCT 1927] OYL.R.101727 October 17th, 1927. Mr. R.W.H. Bailey, Rolls-Royce Ltd., Derby, England. (Copy for attention of Mr. E.W. Hives.) Dear Mr. Bailey: RE: - BRAKES… | ||
| scan0129 | Requested chassis modifications for the first two sports cars, specifically regarding the brake lever, rear spring, and framed instruments. | ||
| View original record | To BY. from Da/EV. c. to Hs. 48420 EV3/M31.10.27. EAC.14. X. 8774 X. 8830 X. 8420 X. 8530 X. 8410 Whilst making the detailed drg. of the coachwork for the first two sports cars, we came across the… | ||
| scan0130 | Mechanics of a braking system and refuting a claim about a swinging arm. | ||
| View original record | X8420 To OY. from Hs/Rn. Hs/Rnl/LG31.10.27. X8370 With reference to your OY2/R102527. I think that we do not quite agree with your remarks possibly because we have included one or two modifications in… | ||
| scan0131 | With diagrams explaining a difficulty with the 40/50 HP servo front equaliser shaft and brake leverage. | ||
| View original record | C O P Y. To BY. To DA. from Hs/Rm. Hs/Rm5/LG11. 2. 27. 40/50 HP. SERVO. GWH. has pointed out a difficulty on the 40/50 HP. servo with the new front equaliser shaft for the latest front axle. We… | ||
| scan0132 | Continued analysis of front brake snatching and thumps, with a proposed solution involving a stop. | ||
| View original record | contd :- -2- The result is that the other end of the T. lever r. moves further forward than its original position and slacks off the front brake ropes. The next time the brakes are applied the… | ||
| scan0133 | Diagram and explanation of the 40/50 Swinging Link mechanism. | ||
| View original record | 40/50 SWINGING LINK IT WILL BE OBSERVED THAT AS THE TOP & BOTTOM OF SWINGING T PIECE HAVE FIXED POSITIONS WITH THE BRAKES RELEASED, THE ARM S ALSO HAS A FIXED POSITION WITH THE BRAKES RELEASED. AND… | ||
| scan0134 | Test report on the effect of adding a steel band damper to a front brake drum to stop brake squeak. | ||
| View original record | File. X8420 Hs/Rm6/LG29.11.27. DAMPERS ON FRONT BRAKE DRUM. Y4612 In order to determine the effect of the thicker drums on brake squeaks, a steel band was shrunk on the outside of the drum of 14-EX.… | ||
| scan0135 | Letter from America acknowledging information on the action of the servo for a bulletin on brakes. | ||
| View original record | X8420 ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. Hs/ OY2.R.11.28.27 [STAMP: RECEIVED DEC ... 1927] November 28th, 1927. Mr. Robotham, Rolls Royce Ltd., Derby, England. Dear Mr. Robotham: RE:… | ||
| scan0136 | Confirming the decision to use cast aluminium for brake straps instead of duralumin. | ||
| View original record | To BY. from Hs. c. to DA. X8420 Hs2/LG9.12.27. [text struck through] During our last visit to WW. it was agreed that we should cancel the use of duralumin for brake straps and stick to the cast… | ||
| scan0137 | Changes to the front equalising shaft levers for the sports car braking system, specifically for the 10-EX model. | ||
| View original record | RHC. from Hs/Rm. X8420 Hs/Rml/LG14.12.27. SPORTS CAR BRAKING. X8420 / X.8330. We anticipate that the final brake distribution on 10-EX and the other sports cars will be obtained with the following… | ||
| scan0138 | Comparison of different brake distribution setups and calculations for sports car applications. | ||
| View original record | X8420 Hs/Rm/LG14.12.27 BRAKE DISTRIBUTION 10-EX. X8420 X8840 (A) V. series braking with new type axle. G.74666 2.5" G.73149 3" } 40.5% to front. (B) Reduced front braking. G.74666 2.5" G.73149 4.0" }… | ||
| scan0139 | Calculation of the torque required on 40/50 servo gears to lock the rear wheels. | ||
| View original record | +8470 Hs/Rml/LG14.12.27. TORQUE ON 40/50 SERVO GEARS. X8370 Maximum torque required from brakes is to lock the rear wheels on dry concrete. Take limousine car 8-EX : Rear wheel weight 32 cwts. = .8 ..… | ||
| scan0140 | Fitting Raybestos brake linings to a Sports Phantom and Tenoid linings to a 12-EX model. | ||
| View original record | X8420 To RHC. from Hs/Rn. Hs/Rml/LG5.1.28. EAC.14 BRAKE LININGS. 43409 Will you please equip the first Sports Phantom with Raybestos brake linings front and rear. These linings were received in the… | ||
| scan0141 | Weight comparison between standard brakes and side by side brakes, detailing component weights and total weight saved. | ||
| View original record | To R. from Hs/RHC. C. to BJ. WOr. C. to R. BY. C. to OA. 48360 Hs/RHCL/LG3. 5. 28. RE. COMPARATIVE WEIGHTS OF STD: AND SIDE BY SIDE BRAKES. We give below the above weights :- Complete Weights Standard… | ||
| scan0142 | Production and testing process for a new set of brake drums for a Phantom car. | ||
| View original record | RHC. c. Hs. c. Mr. Pendlebury. X8420 BY4/G.18.7.28. BRAKE DRUMS. I would like to produce a set of brake drums for the Phantom car which shall have a final brinell of 401 to 441. In producing these… | ||
| scan0143 | Letter to Rolls Royce of America regarding issues and design features of the front brakes on the 61-RF English Phantom. | ||
| View original record | X 8420 Ho 19 th July 1928 EY1/G19.7.28 Messrs Rolls Royce of America, Inc. Springfield. Mass FOR THE ATTENTION OF M. OLLEY, ESQ. Dear Sir, RE FRONT BRAKES ON 61-RF ENGLISH PHANTOM Referring to… | ||
| scan0144 | Letter explaining a design decision about a Duralumin flange and advising on safe braking with four-wheel brakes while steering. | ||
| View original record | 2. found distinctly advantageous to remove this flange entirely thereby introducing flexibility into the drum. The reason we maintained the diameter of the Duralumin flange was with the object of… | ||
| scan0145 | Letter from the American branch regarding front brake trouble on an English Phantom 61-RF. | ||
| View original record | Handwritten (top left): His Copy Handwritten (center): we have a copy Handwritten (center): will By Handwritten (center): I have replied Handwritten (top right): X8420 No 7B81628 Mr. Basil Johnson,… | ||
| scan0146 | Recommendation to modify the drain pipe on the Phantom's side-by-side rear brakes to prevent mud clogging. | ||
| View original record | Y8420 BY. from Hs/GWH. c. to DA. Hs/GWH/LGS.9.10.28. RE. DRAIN PIPE ON PHANTOM - SIDE BY SIDE REAR BRAKES. X8420 X7420 As previously reported, these drain outlets become choked up with mud thrown back… | ||
| scan0147 | Proposal for a main grease drain for side by side brakes, noting the required alterations. | ||
| View original record | BY. from DA. c. to BJ. Hs. X. 8420 DA2/M23.10.28. SIDE BY SIDE BRAKES. MAIN GREASE DRAIN. Herewith we send N.sch.2746 shewing the proposal for a drain equal in size to the previous Phantom. It will be… | ||
| scan0148 | Tests to overcome brake squeaks on the Phantom model by modifying the damper sectors. | ||
| View original record | Hs. from GWH. X8420 2.11.28. PHANTOM - RE. BRAKE SQUEAKS. X8420 / X4612 We have tried out numerous tests to overcome squeaks by the application of various dampings. We have arrived at a considerable… | ||
| scan0149 | Letter to K.B. Speid Esq. explaining the issues with oil pump servo mechanisms in braking systems. | ||
| View original record | X8420 c. to PN. Hs/Rm3/LG. Expl: Dept: 2nd. Nov. 1928. K.B. Speid Esq., The Grove, Loughborough, Leicestershire. X8320 Dear Sir, With reference to your letter of the 28th.ult. We attach herewith some… | ||
| scan0150 | Experimental use of nitrate steel for water pump shafts and brake drums. | ||
| View original record | To BY. from Hs/Rm. x8420 x8150 Hs/Rn3/LG6.11.28. We should like to run experimentally two water pump shafts in nitrate steel. This appears to be one point where this steel might be used beneficially… | ||
| scan0151 | Recommending the adoption of part number N.sch.2746 for the drain on side by side rear brakes. | ||
| View original record | To BY. from Hs. c. to Wor. x8360 Hsl/LG26.11.28. SIDE BY SI DE REAR BRAKES. Y7560 x8360 We should recommend that N.sch.2746 be adopted for the drain on the side by side rear brakes. Hs. | ||
| scan0152 | Explaining the reasons for replacing experimental duralumin forged brake shoes with cast shoes. | ||
| View original record | DA. c. HS. X8420 BY2/G.9.1.29. Referring to DA3/M7.1.29. the duralumin forged brake shoe has never been used on production. It was tried experimentally, but at an early stage of the experimental work… | ||
| scan0153 | Inquiring about the effectiveness of the rear brake mud shield on the Phantom model. | ||
| View original record | To Mx. from Hs. Hs2/LG19.1.29. We should be glad if you will confirm that the rear brakes on the present Phantom do keep free from mud. It has been found on the SS. that the shield was ineffective… | ||
| scan0154 | Technical response concerning the performance of Phantom Rear Brakes in muddy conditions. | ||
| View original record | Hs. X8360 ? X7360 Mxl/T25.1.29 re Phantom Rear Brakes. With reference to your Hs2/IG19.1.29. We do not have any trouble with the rear brakes due to mud getting in, on all examined the internal… | ||
| scan0155 | Front braking alteration for Malcolm Campbell's Phantom car by reverting to an earlier front equaliser shaft. | ||
| View original record | X8420 BY. from Hs/Rm. Hs/Rml/LG20.6.29. MALCOLM CAMPBELLS PHANTOM. X8420 X4117 With reference to this car, the Phantom front braking was reduced owing to cases of taking charge, but now that we have… | ||
| scan0156 | Cost breakdown for re-lining Phantom Brakes of the Side-by-Side Type. | ||
| View original record | Hs/Rm: X8420. Hm/HAWll/KWl.11.29. Re Phantom Brakes - Side-by-Side Type. The cost of re-lining brakes is set out below :- Front Brakes: Supply and fit 8 new Liners and true up brake drums. £5. 11. 0d.… | ||