Rolls-Royce Archives
| Identifier | Entry | ||
| 04-page01 | Design modifications and comparisons for the Wraith servo mechanism. | ||
| View original record | To EH. from HDY. C. Messrs. E. Hs. Dev-RHC. Wraith Servo. Wraith. N. Sch.4309 herewith shows the servo for the Wraith. The diameter of the friction surfaces is slightly greater than for the 20/25. The… | ||
| 04-page02 | Revision to the Wraith II Servo design, comparing its specifications with other contemporary models. | ||
| View original record | Koot 641 Martindale. 79 E/HDY.1/HP.27.8.36. C.E. Des. RMC. Hs/Rm. Wraith II Servo. We send herewith N.Sch.4884 showing a revision of N.Sch.4309, the original design for the Wraith servo. The revision… | ||
| 04-page03 | Cost-reduction modifications for the Wraith II Servo, including material changes and component redesigns. | ||
| View original record | F.J.H. 641.1044 How much wt increase Rm. M. c.c. Mr. Rm. H.S. E/HDY.1/HP.12.2.37. Wraith II Servo. We send herewith:- N.Sch.5028 showing modifications to reduce cost. Various pieces are now made in… | ||
| 04-page04 | Fault with the Wraith servo and requesting further work to be done in the shop. | ||
| View original record | SECRET /641. To HPS. from Rm/AFM. Rm /AFM.11/AP.4.3.37. WRAITH SERVO. This servo is not giving its proper output. We have replaced the star springs by plain washers, first having cleaned up the shaft… | ||
| 04-page05 | Modifications to the Wraith III servo system, including a new rubber stop and pin adjustments. | ||
| View original record | SECRET 641 BY. c.E. Da. Rm. HPS. HPS/RH. E/HDY.1/HP.12.3.37. Wraith III - Servo. We send herewith N.Sch.5039 showing a rubber stop on the reverse link to prevent a knock when the brakes are released,… | ||
| 04-page06 | Investigation into poor braking on two Wraith chassis (24/25.G.VI), detailing servo tests and identifying a fault in the linkage. | ||
| View original record | To E. c. to Hs. c. to Da. c. to Hdy. c. to Rm/GWH. c. to BPs. 641 RM/PJH.5/JH.27.4.37. Wraith Servo. Owing to complaints of poor braking on the two Wraith chassis 24/25.G.VI. we have investigated the… | ||
| 04-page07 | Critique on the strength of servo pull-off springs and a related design modification for the Wraith III. | ||
| View original record | -2- The only feature of these servos which we criticise is the considerable strength of the pull off springs. This is due to the use of one 0.040 spring plate in the servo and has been anticipated by… | ||
| 04-page08 | Secret memo regarding the alteration of Wraith servo cams to fix brake squeaks. | ||
| View original record | SECRET To HPS. from Rm/AFM. 641 Rm/AFM.6/AP.29.7.37 WRAITH SERVO CAMS. Owing to the brake squeaks which have occurred on every Wraith it will probably be necessary to change the Ferodo to one having a… | ||
| 04-page09 | The change of bolts for the Wraith III servo balance lever. | ||
| View original record | G. Dept. C. Rm. 641 DA.7/G.17.8.37. WRAITH III - SERVO. When 1.BA. bolts were abolished by the Standards Committee, the 1.BA. bolts holding the driven member of the servo balance lever (on N.Sch.4309)… | ||
| 04-page10 | Instruction to modify bolts for the Wraith Servo Motor Balance Lever. | ||
| View original record | c. Dept. c. BY. c. HPS c. Rm. c. TB. 641 DA.4/G.10.9.37. AFM File WRAITH - SERVO MOTOR BALANCE LEVER. Referring to HPS/RH.1/CB.2.9.37. the instructions to modify the bolts to .250 are contained in… | ||
| 04-page11 | Internal memorandum requesting the fitting of specific Wraith servo cams to compensate for different linings. | ||
| View original record | To HPS. from Rm/AFM. c. Rm/Wym. 641 Rm/AFM.9/MH.15.11.37. WRAITH SERVO CAMS. Will you please fit a pair of cams Ex.28498/9 to 26-G-VI. These cams have an angle of 35° instead of 40° and will make up… | ||
| 04-page12 | Order of rubber servo stops for the Wraith and Phantom III models. | ||
| View original record | To Roy. from Rm/AFM. c. G/JWH. 641 Rm/AFM.12/AP.8.11.37. WRAITH AND PH.III. RUBBER SERVO STOPS. Will you please order from the British Tyre and Rubber Co., Burton, 12 rubber stops GW.1372 in each of… | ||
| 04-page13 | The dispatch of six Neoprene rubber buffers for the servo on the first six Wraith cars. | ||
| View original record | To RHC/JMW. from Rm/AFM. 641 Rm/AFM.13/AP.10.12.37. 1st. 6 Wraith Cars. Herewith six rubber buffers GW.1372, durometer hardness 40-48 made of Neoprene synthetic rubber, which are intended for use on… | ||
| 04-page14 | Required modifications to the Wraith servo cams. | ||
| View original record | To By/CRL. from Rm/AFM. c. By. c. Da. Rm/AFM.7/MH.1.3.38. 641 WRAITH SERVO CAMS. The stops on these cams restrict their travel to an unnecessary extent, and unless the servo is accurately set and the… | ||
| 04-page15 | Investigation into the causes and prevention of Wraith servo juddering. | ||
| View original record | To Sy. From RM/AFM. S. HS. S. PA. C. MR. C. RM/IMW. Handwritten: 641 WRAITH SERVO JUDDERS. Following reports from France that the servo on 26.G.VI had been juddering, we have carried out a number of… | ||
| 04-page16 | Technical report on the causes and potential cures for mechanical servo brake judder, including experiments with different springs and brake linings. | ||
| View original record | -2- in use on this car are superior to the V.M.30 linings in use previously. SL is running in France and costs less than half as much as Ferodo. The only way permanently to prevent this type of judder… | ||
| 04-page17 | Tests conducted on the servo's star springs to eliminate judder, with a recommendation for a new steel clip design. | ||
| View original record | -3- The four points of the star springs on our servos are now made to register on all 4 springs by means of a keyway in the servo shaft into which project keys on the star springs. When the keyway… | ||
| 04-page18 | Requesting the production of two cast iron servo drums for Wraith & B.III models to resolve issues with steel drums. | ||
| View original record | To HPS. from Rm/AFM. c. Rm/Wym. c. Rm/FD. 641 Rm/AFM.3/AP.16.3.38 WRAITH & B.III. SERVO DRUMS. Will you please make 2 pieces to Rm.507, this being similar to GW.1025 except for material. When ready we… | ||
| 04-page19 | Request to manufacture two graphite bronze packing ring discs for a Wraith Servo. | ||
| View original record | 641 To HPS. from Rm/AEM. c. Rm/Wym. Rm/AFM.9/MH.30.5.38. WRAITH SERVO. Will you please make two discs to the attached drawing Rm.532 as soon as possible. These are packing rings for linings made of… | ||
| 04-page20 | Alteration to servo operating levers to use a stock of 160 incorrectly produced forgings. | ||
| View original record | 641 Bhd/C.S. Hw/Ch. Eng/Insp. W.O.S Rm/AFM. BY/NS.22/G.16.6.36. W.111. SECTION 6180. SERVO MOTOR MECHANISM. GW.1378/9. SERVO OPERATING LEVERS. The Works have a stock of 160 Forgings of the above,… | ||
| 04-page21 | Internal memorandum regarding the sourcing and modification of servo motor star springs for the Wraith model. | ||
| View original record | r 641 To By. from Rm/AFM. c. By/CRL. c. LA. c. MX. Rm/AFM.9/MH.24.6.38. SERVO MOTOR STAR SPRINGS. With reference to the star springs GB.3735 and clip GB.3734, these pieces are wanted for Wraith, not… | ||
| 04-page22 | Alteration to the rubber stop on the servo reverse link for the Wraith III chassis. | ||
| View original record | BT/NS c. Rm. -------- 641 DA.7/G.3.6.38. MARTINDALE WRAITH 111. CHASSIS. RUBBER STOP ON SERVO REVERSE LINK. Please receive herewith blueprint of G.CD.708 showing the rubber stop on the servo reverse… | ||
| 04-page23 | The substitution of reamed fitting bolts with 3.BA. bolts on the Wraith Servo. | ||
| View original record | 641 BY/MS [Strikethrough] c. RV [Strikethrough] c. Rm. DA.8/G.2.9.38. AAM [Handwritten] Do you agree? [Handwritten] WRAITH SERVO. Works are anxious to avoid the reamed fitting bolts holding the… | ||
| 04-page24 | Groaning noises from the Wraith servo and a proposed change of material to RAD13 to resolve the issue. | ||
| View original record | 641 A.F.M. PY Run May Can we give Archer some samples of R.A.D.13 to try. RE. WRAITH SERVO We are having a certain amount of trouble with groans from the servo. The trouble occurs after a car has been… | ||
| 04-page25 | Material change from 'Halo' to RAD.13 for the Wraith Servo on the 'C' series chassis. | ||
| View original record | 641 LA. Rm. Mx. BY.34/N.30.11.38. Wraith - Servo. ----------- Referring to your memo LA.3/T.30.11.38, the RAD.13 Material has been instructed for 'C' series chassis in place of "Halo" material. BY. | ||
| 04-page26 | Use of RAD13 material to resolve a 'servo groan' issue on the Wraith chassis. | ||
| View original record | BY Rm MX By: Recomment Archer tries some RAD13 forthwith 641 LA10/T1.12.38 Rm WRAITH SERVO I note according to memo BY34/N30.11.38 that RAD13 material has been instructed for 'D' Series chassis, but… | ||
| 04-page27 | Requesting an urgent order for RAD.13 parts for the Wraith Servo due to production issues with 'Halo' material. | ||
| View original record | Roy. c. Roy/Ms. c. Rm. c. Lm. 641 BY.1/N.3.12.38. WRAITH - Servo. Instructions have been issued for RAD.13. material to be ordered for 'C' series chassis, but as we are having a certain amount of… | ||
| 04-page28 | Supply and testing of Wraith servo parts produced in RAD.13 material. | ||
| View original record | 641 LA. Rm. Mr. BY.2/N.3.12.38. Wraith - Servo. ARM Referring to your memo LA.10/T.1.12.38, we have asked Roy. to obtain a supply of parts produced in RAD.13 material, and we suggest you try this on a… | ||
| 04-page29 | The delivery and fitting of new servo friction material GW.2148 for the Wraith model to avoid squeaks. | ||
| View original record | Rm/AFM. 641 BY.13/G.17.12.38. WRAITH - RE: SERVO FRICTION MATERIAL GW.2148. Will you kindly note that 57 of the above parts have been delivered in RAD.13 (S.5775) material. I think it was desired to… | ||
| 04-page30 | B.5 with Wraith gearbox, referencing another file. | ||
| View original record | Rm. 641. Da. 419. 22.12.38. B.5 with Wraith gearbox. see file 628 | ||
| 04-page31 | The delivery schedule for liners and clarification on material specifications. | ||
| View original record | Dr. ROY. Dev. Entr. Re. Mngr. 64D A.F.M Roy/AW.6/TB. 7. 2. 39. Further to your memo' BY12/N.3.2.39. You will, in all probability have utilised the 144 - Liners - G.2148., which were delivered by… | ||
| 04-page32 | Requesting an order for 228 sets of friction lining for the 25/30-HP chassis servo motor and mechanism. | ||
| View original record | 641 To. Royce cc Hoy/Me. c. Rm. c. Ld. cc Bt. 25/30-HP. CHASSIS. SERVO MOTOR & MECHANISM. SECTION 6180. In accordance with memo' BY.12/N.3.2.39., will you please arrange to order 228 sets of the… | ||
| 04-page33 | Request to fit a solid servo back plate to chassis 28.G.VI. | ||
| View original record | 600 (crossed out) 641. To HPS. Rm/JBD.4/JH.27.3.39. 28.G.VI. Will you please fit a solid servo back plate to the above chassis as an production. .Rm/JBD. | ||
| 04-page34 | Request to make one set of Wraith servo cams with 30° for experimental work with VG.90 linings. | ||
| View original record | 641 To HPS. Rm/JBD.18/JH.7.6.39. Will you please make one set of Wraith servo cams with 30°. These are for experimental work with VG.90 linings. Rm/JBD. | ||
| 04-page35 | Instruction to replace a cork plug on the Wraith model's Servo Drive Shaft. | ||
| View original record | 641 File To: RV/CRL RHC. LA Rm/AFM NS/GB. BY/NS6/MG.28.6.39 WRAITH SERVO DRIVE SHAFT Please delete the cork plug GW.1183 from the Servo Drive Shaft, and replace by G.540. The large plug should be… | ||