Rolls-Royce Archives
| Identifier | Entry | ||
| 01-page01 | Instructional memo regarding blueprints for new drawings and parts for the Wraith III Chassis piston section. | ||
| View original record | 636. c. BY. c. Rm/Gry. BY/CS1/ER.29.9.37. Wraith III Chassis - Piston - Section 504C. 6 sets. Please receive herewith blue prints of the following new drawings and L.O.P., detailed in accordance with… | ||
| 01-page02 | Request for a new drawing and part number for a Wraith compression ring. | ||
| View original record | BY. By/CS. 6/36? Rm/Mths.14/JH.10.11.37. WRAITH COMPRESSION RINGS. We should like a drawing for a new compression ring for Wraith similar to EW.1425 except that we wish the taper on the periphery to… | ||
| 01-page03 | Request to modify 12 EW.1536 compression rings for Wraith engines No.6 and No.7. | ||
| View original record | HPS. 686 Rm/Mths.9/JH.25.11.37 WRAITH COMPRESSION RINGS. Will you please modify 12 EW.1536 compression rings to the attached sketch Rm.471. We have these rings and are handing them over with drawing… | ||
| 01-page04 | Request for six sets of 25/30 pistons for the Wraith III model to investigate a 'scuffing' trouble. | ||
| View original record | 8636 To HPS. from Rm/Swdl. c. Rm/Wym. Rm/Swdl.3/MH.7.1.38. WRAITH III. Will you please instruct for 6 sets of 25/30 pistons complete to LOP. 2 sets have been borrowed from production in view of the… | ||
| 01-page05 | Changes to the design and material for Wraith piston rings due to distortion issues. | ||
| View original record | To By. c. to By/CS. 636 Rm/Mths.6/JH.7.1.38. WRAITH PISTON RINGS. Will you please arrange to have drawing and LOP. altered in respect of the following items. (1) EW.1536 Compression to be made from… | ||
| 01-page06 | The unsatisfactory performance of Wraith piston rings and a directive for a revised assembly. | ||
| View original record | To By. from Rm/Mths. c. By/CS. c. HPS/RH. [Handwritten]: 636 Rm/Mths.10/MH.12.1.38. WRAITH PISTON ASSEMBLY. We find that the performance of rings EW.1536 and the 'L' section rings made from EW.1536 is… | ||
| 01-page07 | Instruction memo regarding piston materials and production for the Wraith III chassis. | ||
| View original record | 636 HY/CS7/RH.13.1.38. Re Wraith III Chassis - Piston - Section 5040. 6 sets. Will you please instruct up 6 sets of material to the following L.O.P. which is present 25/30 HP. production. E.60761… | ||
| 01-page08 | Instructions concerning the use of standard 25/30 piston rings instead of high pressure rings for early Wraith engines. | ||
| View original record | RHO. H'S. [Illegible Redacted Stamp] c. Rm. 636 BY.17/G.13.1.38. WRAITH ENGINES - RE: PISTON RINGS. In order to prevent trouble arising in connection with the early Wraith engines, it will be… | ||
| 01-page09 | Specifying the type of pistons for the first 100 sets for the Wraith model. | ||
| View original record | 636. BY/CS Rm. --- BY/Mtn9/N.17.1.38. ------------------ Wraith - Pistons - 100 sets. ---------------------------- Kindly note the first 100 sets of Pistons should be the present standard 25/30 h.p.… | ||
| 01-page10 | Instructions regarding new drawings for 'L' Section Compression Rings for the Wraith III Chassis piston. | ||
| View original record | 636. Poles BY/CSG/EH.19.1.38. Re Wraith III Chassis - Piston - Section 5040. Compression Rings with higher En. Value. Rm.471 - "L" Section Compression Ring. Please receive herewith blue prints of the… | ||
| 01-page11 | Requesting an official order for 48 compression rings for experiments on a Wraith chassis. | ||
| View original record | S/F 636 To Roy. from Rm/Mths. c. G/J.W.H. c. HPS/W.Butterworth. Rm/Mths.9/AP.28.1.38 Will you please pass an official order to Messrs. Hepworth & Grandage Ltd., for 48 compression rings to E.60820… | ||
| 01-page12 | Suspension of tool work on the Wraith III Piston, part number EW1424. | ||
| View original record | 636 RHC CRHC/CAH. CRHC/ELD. CEY. CRHC/DM. C.E.U. RHC/JWW.3/HM. 8. 4. 38. Wraith 111 Piston - EW1424. ------------------------- We have received intimation that the Tool Work is to be suspended on this… | ||
| 01-page13 | Technical comparison of piston scuffing in various Wraith, Bentley, and 25/30 HP engines. | ||
| View original record | COPY FOR FILES. WRAITH PISTON SCUFFING. In addition to the Wraith engines we have also had scuffed Pistons in the engine of O.B.IV, the Bentley for 10,000 miles, and a comparison is tabulated below of… | ||
| 01-page14 | Investigation into piston scuffing in Wraith engines and proposed experimental solutions. | ||
| View original record | 2.2.38. the material, which in all cases is R.R.53. Taking the first three Wraith chassis in the table, which were all new engines, we find they have seized when using either Motorine "C" or Mobiloil… | ||
| 01-page15 | Clarifying sizing and stamping conventions for Wraith pistons and cylinder blocks. | ||
| View original record | 636. To RHC/SS. from Rm/Mths. Rm/Mths.4/MH.14.6.38. WRAITH PISTONS. There is apparently some doubt as to the correct pistons to fit with various cylinder diameters. The procedure in the past has been… | ||
| 01-page16 | Potential causes and recommendations regarding 25/30 HP engine piston seizures. | ||
| View original record | 636 To By. from Rm/Swdl. Rm/Swdl.19/MH.5.7.38 25/30 H.P. ENGINE PISTON SEIZURE. Further to the memo B.14/G.29.6.38 2 in regard to the above and that future decarbonising should include the land above… | ||
| 01-page17 | Blueprints for Wraith pistons, detailing production, modifications, and distribution. | ||
| View original record | 636 To HPS. c. Rm. c. Rm/Swdl. (Strikethrough) c. Da. (Strikethrough) c. Da/Me.S. (Strikethrough) c. Mr. (Strikethrough) c. B.Dept. (Strikethrough) BY/NS.1/WB.22.7.38. WRAITH. PISTONS. We send you… | ||
| 01-page18 | Producing a new set of six Wraith pistons with eccentric grinding, referencing blueprint EW.1883. | ||
| View original record | 636 To. HPS. c. Rm c. Rm/Swdl. c. Da. c. Da/Mc.S. c. Lr. c. E.Dept. BY/NS.1/WB.22.7.38. WRAITH. PISTONS. We send you herewith blue print of :- EW.1882 Piston. 6 off. EW.1883 Piston (Eccentric… | ||
| 01-page19 | Request for a detail drawing of a modified piston for the Wraith III. | ||
| View original record | Dr/es. c. Rm. 636. BY/NS.12/G.13.12.38. WRAITH 111. PISTON. Will you kindly produce a detail drawing of a piston with parallel ring land, similar to EW.2065, except that the dimension from centre line… | ||
| 01-page20 | Modifications to the raised crown piston for the Wraith model, referencing specific drawings. | ||
| View original record | 636 To By/CS. c. to Da/Mc. c. to Mx. Rm/CTC.16/JH.18.1.39. PISTONS. With reference to the raised crown piston for the Wraith. The latest detail drawing EB.4499 incorporates all the modifications to… | ||
| 01-page21 | Use of 50 surplus sets of Wraith pistons on the 'C' series chassis. | ||
| View original record | 416 To By. from Rm/Swdl. c. By/NS. c. RHC/GL. Rm/Swdl.3/MH.3.4.39. WRAITH PISTONS. In accordance with the attached memo RHC/GL/WB.1/BM. /1.3.39, we consider that the 50 surplus sets of Wraith pistons… | ||
| 01-page22 | Request to fit a set of flush type Aerolite pistons into a W.III No.5 unit. | ||
| View original record | 636 To HPS. from Rm/Swdl. Rm/Swdl.1/MH.3.4.39. 28.G.VI. (W.III No.5 UNIT). Will you please fit a set of flush type Aerolite pistons into the above unit. Rm/CTS. will supply the pistons. Rm/Swdl. | ||
| 01-page23 | Request to remove existing P.450 pistons and fit new P.446 pistons on a Wraith III No.4 Unit for a test. | ||
| View original record | 636 To HPC. Rm/CTS.8/JH.24.4.39. Piston Test. Wraith III No.4. Unit. Will you please remove the existing pistons P.450 from the above unit and fit - 6 new pistons P.446 (standard TC.15). The engine is… | ||
| 01-page24 | Piston ring tests comparing pinned and non-pinned rings for unit W.111 No: 4. | ||
| View original record | HPS/RH. Rm/CTS.1/ML.16.3.40. W.111 No: 4. UNIT. PISTON RING TESTS. In conjunction with the tests which are being carried out on No: 30 Test House, we wish to make a direct comparison between pinned… | ||