Rolls-Royce Archives

Rolls-Royce Experimental Archives: Box ExFiles\Box 155\2\        Box Selection

IdentifierEntry
scan0001 Programme of test bed work for a Phantom engine, detailing carburettor, ignition, and camshaft tests.
View original record To Rm. From Rm/Swdl. c. to Rm/Mths. c. to Rm/GTS. Rm/Swdl.2/AP.24.11.36. PROGRAMME OF TEST BED WORK No.5. TEST BEDS. PHANTOM. (1) No.8. Unit now being run to find the best timing with the…

scan0002 Progress report on endurance testing and component specifications for various engine units.
View original record -2- Rm/Swdl.2/AP.24.11.36. Nos. 3 & 4 A & B. exhaust have .010 clearance. Nos. 5 & 6 A & B. " " .012 " In conjunction with the KE.965 exhaust valves we should from the above know how much clearance is…

scan0003 Test procedures and requirements for various engines, including B.22, C.16, and the B.23 O.H.C. engine.
View original record -3- No.30 BED. B.22. Engine to be brought up to gear quietening stage for fitting in B.56.BN. Tests required as follows:- (1) Power Curve. (2) Ignition curves (Silencer std. and Shell No.1.) (a)…

scan0004 Order for solid idler gears for Phantom III test bed engines due to cracking issues.
View original record 1202 To HPS. from Rm/Swdl. Rm/Swdl.2/AP.27.11.36. Will you please order for use on the Ph.III. test bed engines which have obsolete type of Fabroil idler gears and to which the present standard idlers…

scan0005 Proposing a reliability test rig for a 4¼-Litre Bentley overhead camshaft engine conversion.
View original record HPS. from Rm/CTS. c. to WB. Rm/CTS5/R.28.11.36. 4¼-LITRE BENTLEY. OVERHEAD CAMSHAFT ENGINE. We wish to test for reliability the conversion scheme for the above engine. To do this, it is not necessary…

scan0006 Program of test bed work for Phantom III and Bentley engine units.
View original record 1315 To Rm. from Rm/Swdl. c.c. to Rm/Mths. c.c. to Rm/CTS. Rm/Swdl.13/AP.30.11.36. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.2/AP.24.11.36. NO.5 TEST BED. PHANTOM III. No.8.Unit. (1)…

scan0007 Engine test instructions and specifications for B.19 and O.H.C. Bentley No.23.
View original record -2- B.19 continued Endurance to be carried out alternate 10 hours full load and ½ load. Has existing AC.1. main and new RR.56. big end bearings. Oil consumption to be taken having one of two special…

scan0008 Instructions for oil testing on a C.14 unit and assembly details for a B.9 test bed unit.
View original record -3- 25/30 (C.16) Complete jobs instructed on previous memo. C.14. This unit to be fitted on bed until B.9. is ready. Carry out tests with various oils. Duck-hams N.P.1, 2 & 3. Mobiloil Artic. Price's…

scan0009 Programme of test bed work for Phantom III and Bentley engine units.
View original record 1345 Test To Rm. from Rm/Swdl. c. to Rm/Mths. c. to Rm/CTS. Rm/Swdl.13/AP.30.11.36. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.2/AP.24.11.36. NO.5. TEST BED. PHANTOM III. No.8.Unit. (1)…

scan0010 List of engine endurance test instructions and specifications for an O.H.C. Bentley engine.
View original record -2- Rm/Swdl.13/AP.30.11.36. B.19 continued Endurance to be carried out alternate 10 hours full load and ¼ load. Has existing AC.1. main and new RR.56. big end bearings. Oil consumption to be taken…

scan0011 Instructions for completing jobs and carrying out various oil and engine unit tests.
View original record -3- Rm/Swdl.13/AP.30.11.36. 25/30 (C.16) Complete jobs instructed on previous memo. C.14. This unit to be fitted on bed until B.9. is ready. Carry out tests with various oils. Duck-hams N.P.1, 2 & 3.…

scan0012 Sending holders for each test bed to indicate special parts and the nature of the test.
View original record P202 Test To Rm/Mths. & Rm/CTS. Rm/Swdl.9/JH.4.12.36. I am sending 5 holders one for each bed in which specification cars should be fitted, givin an indication of special parts which are being tested…

scan0013 Programme of test bed work for various engine units, outlining endurance tests and development features.
View original record 1315 To Rm. from Rm/Swdl. c. to Rm/Mths. c. to Rm/CTS. Rm/Swdl.9/AP.7.12.36. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.13/AP.30.11.36. NO.5. TEST BED. Ph.III. No.6. Unit Endurance on this…

scan0014 Technical memo detailing continued testing and assembly programmes for various engine units.
View original record -2- Ph.III. No.14. unit continued (1) Power Curve. (2) Power and distribution with hot box modified and new air bend as being made by HPS. The hot spot experiment should be tried out on standard cast…

scan0015 Test specifications for unit B.9 (25/30) including air intake, exhaust valves, and spark plug requirements.
View original record -3- Rm/Swdl.9/AP.7.12.36. B.9. (25/30) To follow C.15., B.9. is fitted up with special air intake combined in rocker cover LeC.4538. Distribution, power and noise to be compared with standard air…

scan0016 Request to test the deletion of the front inlet water pipe on the Phantom III hot spot box to save weight and expense.
View original record TB 1318 To Rm/Mths. from Rm/Swdl. c. to Rm/CTS. Rm/Swdl.18/AP.9.12.36. PHANTOM III. Will you please carry out a test on the hot spot box, to determine whether the front inlet water pipe to the box can…

scan0017 Request confirming the addition of a radius to chromium-plated front collets for airscrew hubs on test beds.
View original record To EJJ. 1395 E/Rbr/LGF.2/MN.10.12.36. Copy to HPS. Re Chromium Plated Front Collets for Airscrew Hubs on Test Beds. Will you please have a .062" radius added to each side of the location diameter on…

scan0018 Order for 12 glass tube thermometers from L. Casartelli & Sons.
View original record 1315 To Roy. from Rm/Swdl. Rm/Swdl.3/AP.14.12.36. Will you please order for use on the Experimental chassis beds 12 glass tube thermometers 0°C. to 100°C. from L. Casartelli & Sons, Manchester.…

scan0019 Programme of test bed work for Phantom III, Continental, and Bentley engine units.
View original record 1315 To Rm. from Rm/Swdl. c. to Rm/Mths. c. to Rm/CTS. Rm/Swdl.12/AP.14.12.36. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.9/AP.7.12.36. No.5. TEST BED PHANTOM III. No.3.Unit. Continue…

scan0020 Engine component assembly and testing procedures for endurance and oil consumption.
View original record -2- Rm/Swdl.12/AP.14.12.36. B.19. Following release of B.4., to be re-fitted on bed for further endurance; ---------------- No.30 BED BENTLEY O.H.C. No.23. Continue programme of previous memo. 25/30.…

scan0021 Request to arrange a test bed mounting for a Bentley engine.
View original record 1315 EJJ/JV. Rm/WB.10/JH.15.12.36. Will you please arrange for a Bentley engine test bed mounting - including bed plate - to be supplied to this department, and arrange to drive the engine from the…

scan0022 Programme of test bed work for a Phantom III engine, No. 9 unit, outlining specifications and jobs to be carried out.
View original record 1315 Rm. from Rm/Swdl. c. to Rm/Mths. o. to Rm/CTS. Rm/Swdl1/R.30.12.36. PROGRAMME OF TEST BED WORK. FURTHER TO MEMO Rm/Swdl12/AP.14.12.36. NO.5 TEST BED. PHANTOM III. No.9 Unit. Preparatory run on…

scan0023 Instructions for engine assembly, testing, and component modifications for various Continental and Bentley units.
View original record -2- (7) Prior to going to gear quietening, a full list of any attention necessary by the shop to be made. (8) Note oil pressure at idling speed with hot oil. No. 14 Continental Unit. Following seizure…

scan0024 List of tests and considerations for an OHC engine's valve gear, induction system, and related components.
View original record -3- No.30 Bed. OHC Engine. (1) If when the inner valve springs are removed the valve bounce speed comes below 4500 RPM. (2) Balancing cam, effect of flywheel removal and tensioner on driving side…

scan0025 List of tests, reports, and modifications for various engine components.
View original record -4- (5) Report of balancer and chain periods. (6) Thermometer pocket wanted in cylinder head. (7) Allowance for including fan. 25/30. B.9. (1) Complete distribution tests and issue report. (2) Run…

scan0026 Outlining the programme of test bed work for various engine units.
View original record 1315 To Rm. c. to Rm/Mths. c. to Rm/CTS. Rm/Swdl.17/JH.4.1.36. Programme of Test Bed Work. Further to memo. Rm/Swdl.1/R.30.12.36. No.5 Test Bed. - Phantom III. No.14 Continental Unit. Continue with…

scan0027 Instructions for endurance and oil consumption testing of engine components B-3 and B-9.
View original record -2- Rm/Swdl.17/JH.4.1.36. run. R.R.5 big ends and other parts have been previously Following a careful running in, 10 hrs. full throttle endurance to be carried at usual Bentley speeds. B-9 By the…

scan0028 Experimental test report on the air silencer and distribution for a 25/30 HP engine.
View original record To E. c. to Da. 1315 Rm/CTS.16/JH.7.1.37. EXPERIMENTAL TEST REPORT. 25/30 H.P. AIR SILENCER AND DISTRIBUTION. Parts under test. Combined air silencer and rocker covers to E.61022. Method of test.…

scan0029 Report concluding that a new system is significantly noisier and showed a 2% economy gain in bench tests, requiring further road tests.
View original record -2- carburetter; this modification to the H.V. choke makes the method of support the same as that of the Phantom III carburetter. (3) Noise. There is very much more noise with this system than…

scan0030 Graph showing results from Test No. 4, plotting air/fuel ratio distribution for a standard open carburetter across different cylinder pairs.
View original record 25/30 DISTRIBUTION S.17. TEST N°4 STANDARD CARBURRETTER OPEN (NO BEND OR SILENCER) AIR/FUEL RATIO 15 14 13 12 11 CYLS 1&2 CYLS 5&6 CYLS 3&4 500 1000 1500 2000 2500 3000 3500 4000 C.T.S.

scan0031 Performance graph showing air/fuel ratio versus RPM for an air silencer under full and part load conditions.
View original record 25/30. TEST N°3. AIR SILENCER & DISTRIBUTION S.16. ROCKER COVER AIR SILENCER E.61022 WITH 2ND H.V CHOKE SUPPORT IN CARBURRETTER. FULL THROTTLE - FULL LOAD CYLS. 1 & 2 CYLS. 3 & 4 CYLS. 5 & 6 PART…

scan0032 Graph of Test No. 2 results for a Rocker Cover Air Silencer, showing Air/Fuel ratio vs R.P.M. for various cylinders at full and part throttle.
View original record * TEST No 2 25/30 AIR SILENCER & DISTRIBUTION S.15 ROCKER COVER AIR SILENCER E.61022 WITH STANDARD CARBURETTER AIR/FUEL RATIO R.P.M. PERCENTAGE THROTTLE OPENING FULL THROTTLE - FULL LOAD CYLS 1&2 CYLS…

scan0033 Graph comparing air/fuel ratios across different cylinders under full and part throttle conditions.
View original record 25/30 S.14. AIR SILENCER & DISTRIBUTION. TEST N°1 STANDARD AIR SILENCER & CARBURETTER. FULL THROTTLE - FULL LOAD CYLS 1 & 2 CYLS 3 & 4 CYLS 5 & 6 PART THROTTLE - HALF LOAD THROTTLE OPENING C.T.S.…

scan0034 Programme of work for various engine test beds, detailing specific tasks and component assemblies.
View original record 1315 To Rm. from Rm/Swdl. C. to Rm/Mchs. C. to Rm/GTS. Rm/Swdl.15/AP.12.1.37. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.1/R.30.12.36. No.5. Test Bed Phantom III. No.14. CONTINENTAL UNIT.…

scan0035 Engine testing and modification report for a 25/30 BED model, detailing bearing replacement, endurance tests, and further cooling system trials.
View original record -2- 25/30 BED. B.3. Following No.2. big end bearing seizure this has been replaced by a new RR.56. bearing. An extra and opposite hole in each crankpin has been drilled. 2 hours full throttle…

scan0036 Programme of test bed work for engine units from the Phantom III, Bentley, and Wraith models.
View original record SECRET 1315 To Rm. from Rm/Swdl. c. to Rm/Mths. c. to Rm/CTS. Rm/Swdl.10/AP.18.1.37. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.1/R.30.12.36. No.5. Test Bed. PHANTOM III. No.14. Continental…

scan0037 Engine test results and required modifications for multiple units.
View original record -2- Rm/Swdl.10/AP.18.1.37. W.1.Unit continued Light running, timing gears quietened on bed and power curve, all leaks and complaints to be cured on the bed. Oil pressures to be checked over, design…

scan0038 Programme of test bed work for Phantom III, Bentley, and Wraith engine units.
View original record SECRET 1315 To Rm. from Rm/Swdl. C. to Rm/Mths. C. to Rm/OBS. Rm/Swdl.10/AP.18.1.37. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.1/R.30.12.36 No.5. Test Bed. PHANTOM III. No.14. Continental…

scan0039 Technical notes on engine testing, modifications, and troubleshooting for units W.1, O.H.C. No. 23, and C.15.
View original record -2- Rm/Swdl.10/AP.18.1.37. W.1.Unit continued Light running, timing gears quietened on bed and power curve, all leaks and complaints to be cured on the bed. Oil pressures to be checked over, design…

scan0040 Rm/Swdl to HPS requesting a promise on a list of urgent jobs for various models.
View original record To HPS. from Rm/Swdl. 1312 Rm/Swdl.1/AP.20.1.37. Can you please give a promise for the following jobs. Jobs marked * are very urgent. BENTLEY (1)* 10º Helical pumps Rm/Swdl.10/AP.13.1.37. (2)* Special…

scan0041 Progress of urgent designed jobs for Bentley and Phantom III models.
View original record To HPS. from Rm/Swdl. 1315 Rm/Swdl.5/AP.22.1.37. PROGRESS OF DESIGNED JOBS. The following are the most urgent jobs required and we should be pleased if you could approximate when they will be…

scan0042 The start of work on a new Test House and ensuring all necessary equipment is on order.
View original record 1315 Rm/Swdl. from Rm. Rm18/R.28.1.37. NEW TEST HOUSE. Work on the new Test House will be started shortly. We shall be glad if you will ensure that all the equipment necessary for this Test House is…

scan0043 Programme of test bed work for the Phantom III, covering Continental Unit tests and a sump overfilling complaint.
View original record To Rm. from Rm/Swdl. c. to Rm/Mths. (struck through) c. to Rm/OTS. (struck through) J1315 (handwritten) Rm/Swdl.7/AP.29.1.37. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.10/AP.18.1.37. No.5.…

scan0044 Technical memorandum detailing engine testing, modifications, and issues for various car models.
View original record -2- Rm/Swdl.7/AP.29.1.37. BENTLEY BED. C.16. This unit is to be handed over to Production in exchange for the unit which they supplied us for Sg.'s car. To have usual running in and power curve etc.…

scan0045 Instructions for testing and comparing cylinder blocks and an external Packard damper.
View original record -3- Rm/Swdl.7/AP.29.1.37. C.15. continued. Whilst in the Shop we shall fit a customer's block and pistons for comparison of consumption. C.14. Whilst C.15. is in Shop for the change of cylinder…

scan0046 Programme of test bed work for the Phantom III, including exhaust system comparisons and an investigation into oil overfilling.
View original record 1315 To Rm. from Rm/Swdl. c. to Rm/Mths. c. to Rm/CTS. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.10/AP.18.1.37. No.5. TEST BED. PHANTOM III. No.14. CONTINENTAL UNIT. Complete Std.'s water…

scan0047 Engine testing, modifications, and issues for Bentley, Wraith, and Phantom III models.
View original record -2- Rm/Swdl.7/AP.29.1.37. BENTLEY BED. C.16. This unit is to be handed over to Production in exchange for the unit which they supplied us for Sg.'s car. To have usual running in and power curve etc.…

scan0048 Work on units C.14 and C.15, involving parts comparison and endurance testing.
View original record -3- Rm/Swdl.7/AP.29.1.37. C.15. continued. Whilst in the Shop we shall fit a customer's block and pistons for comparison of consumption. C.14. Whilst C.15. is in Shop for the change of cylinder…

scan0049 Programme of test bed work for Phantom III engines, detailing experiments and modifications.
View original record To Rm from Rm/Swdl c to Rm/MTHS c to Rm/CTS 1315 Rm/Swdl2/M.9.2.37. Programme of Test Bed Work. Further to memo Rm/Swdl/7/AP.29.1.37. No. 5 Test Bed. PHANTOM III. No. 14 Continental Unit. (1)…

scan0050 Test procedures and investigations for various Bentley engine units, covering oil consumption, crank replacement, valve springs, and water leaks.
View original record - 2 - Bentley Bed. B.9. Oil consumption tests to be carried out on this unit which has a cylinder block ground with head and crankcase in position. Run until a flat figure is obtained, then fit a…

scan0051 Test instructions and notes for various engine units, including a Bentley Unit.
View original record - 3 - No. 30 Bed (Contd). OHC No. 23 Bentley Unit. 3. Test out the reduced bore induction system. 4. Gear quieteners to quieten gears and engine generally to be brought up to as good for quietness as…

scan0052 Programme of test bed work for the O.H.C. Bentley Unit No. 23 and the Wraith No. 2.
View original record 13/5 Rm. from Rm/Swdl. c. to Rm/Mths. c. to Rm/CTS. Rm/Swd13/R.18.2.37. Programme of Test Bed Work. Further to memo Rm/Swdl//AP.29.1.37. No.30 Bed. O.H.C. Bentley Unit No.23. Following investigation…

scan0053 Engine testing procedures for oil pressure, gears, bearings, and valve bounce.
View original record -2- Inlet to be taken from a tapping in the main pressure and the outlet to the rocker pressure. Arrange taps so that the oil flows may be taken. Observe effect on oil pressures when idling. (5) Gears…

scan0054 Test procedures and observations for engine components, focusing on tappets, springs, and oil consumption.
View original record -3- Confirm one way or the other by power with silent tappet action deletion by removal of plunger springs. The idea of above is to see whether the existing std. double springs can be replaced by…

scan0055 Programme of test bed work for Wraith, Bentley, and other experimental engine units.
View original record 131 S To Rm. from Rm/Swdl. c.c. to Rm/Mths. c.c. to Rm/CTS. Rm/Swdl.9/AP.27.2.37. PROGRAMME OF TEST BED WORK. Further to memo RM/Swdl.3/R.18.2.37. No.30. BED. WRAITH NO.2. Programme as previous memo…

scan0056 List of special parts and testing procedures for a Phantom III engine unit, numbered No.3.
View original record -2- Rm/Swd1.9/AP.27.2.37. (3) Midland cylinder block. (4) 45° angle timing gears. (5) L.5. material crankshaft. (6) Special valves and springs. S.65 and S/SLV. (std) inlet valves. S/SLV. and KE.965…

scan0057 Tappet clearance settings and comparative oil consumption test procedures for the Phantom No.6 unit.
View original record -3- Rm/Swdl.9/AP.27.2.37. Tappets running with silent tappet action deleted to be set at following clearances- A. side - Inlets .004. Exhaust .006. B. side - .010. Silting after engine has settled…

scan0058 Programme of test bed work for Wraith and Bentley engine units, detailing modifications and test procedures.
View original record 1315 To Rm. from Rm/Swdl. c.c. to Rm/Mths. c. to Rm/CTS. Rm/Swdl.9/AP.27.2.37. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.3/R.18.2.37. No.30. BED. WRAITH NO.2. Programme as previous memo…

scan0059 List of engine components and test specifications for a Phantom III unit.
View original record -2- (3) Midland cylinder block. (4) 45° angle timing gears. (5) L.5. material crankcase. (6) Special valves and springs. S.65 and S/SLV. (std) inlet valves. S/SLV. and KE.965 (std) Exhaust valves. 1 -…

scan0060 Engine testing instructions for a Phantom No. 6 unit, focusing on tappet clearances and comparative oil consumption tests.
View original record -3- Rm/Swdl.9/AP.27.2.37. Tappets running with silent tappet action deleted to be set at following clearances- A. side - Inlets .004. Exhaust .006. B. side - " " .010. Silting after engine has settled…

scan0061 Programme of test bed work for the Wraith No.2, O.H.C. No. 23, and B-18 units.
View original record 1315. To Rm. c. to Rm/Mths. c. to Rm/CHS. Rm/Swd1.6/JH.9.3.37. Programme of Test Bed Work. Further to memo. Rm/Swd1.9/AP.27.2.37. No.30 Bed. Wraith No.2. Following completion of tests and gear…

scan0062 Engine component endurance and performance testing procedures.
View original record -2- B-18 is for endurance, having W/M. shell main and big end bearings as produced by the Vandervell Co. Narrow pin connecting rods. High pressure piston rings. Endurance after running is to consist…

scan0063 Requesting summary reports and details on tests carried out on engine test beds.
View original record 1315 To Rm/Mths. from Rm/Swdl. c. to Rm/CTS. Rm/Swdl.3/AP.16.3.37. In order to keep a detailed check on the tests carried out on the beds will you please send me a summary report and curves etc. of…

scan0064 Programme of test bed work for O.H.C. No. 23 and B.18 units, including endurance, noise, and performance tests.
View original record 1315. To Rm. c. to Rm/Mths. c. to Rm/CTS. Rm/Swdl.10/AP.16.3.37. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.9/AP.27.2.37 No.30 Bed. O.H.C. No.23.Unit. Continue with tests as in previous memo…

scan0065 Ignition advance test procedures for an engine on test bed No. 5.
View original record -2- No.5.Test Bed. Ph.III. No.3. Complete the ignition advance tests as follows on Shell. 1. Running on single Inlet Ignition only. (a) Non detonating line (power and advance) (b) Max. power line…

scan0066 Summary report on fitting a unit with a modified crankshaft, specific bearings, and completing an endurance test.
View original record -3- Rm/Swdl.10/AP.16.3.37. B.9. unit continued Summary report of work carried out on lines of separate memo dealing with this. Report to P/Psn. on valve springs and bounce with and without tappet…

scan0067 Programme of test bed work for O.H.C. B.23 and B.17 units, detailing investigations on exhaust systems and oil pumps.
View original record To Rm. from Rm/Swdl. c. to Rm/Mths. c. to Rm/CTS. 1315. Rm/Swdl.11/AP.23.3.37. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.10/AP.16.3.37. No.30 Bed. O.H.C. B.23.Unit. Continue with tests as…

scan0068 Engine testing procedures, including endurance tests, component analysis, and specific instructions for various units.
View original record -2- Rm/Swdl.11/AP.23.3.37. From the drawings of the springs and layout of the pump, calculate the pressure at which the respective valves lift. Will you issue summary report with the necessary figures…

scan0069 Outlining the status and requirements for endurance and consumption tests on units B.19 and B.9.
View original record -3- Rm/Swdl.11/AP. 23.3.37. tests in accordance with Rm/Std. Unit to then be returned to the shop for inspection. B.19 Endurance as per previous memo to be continued. B.9 This unit which has been…

scan0070 Programme of test bed work for O.H.C. unit B.23 outlining investigations, and noting unit B.24 is next for testing.
View original record 1315. To Rm. ~~c.c. to Rm/Mths.~~ ~~c.c. to Rm/OTS.~~ Rm/Swdl.6/AP.2.4.37. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.11/AP.23.3.37. No.30 Bed. O.H.C. B.23.Unit. (1) Complete exhaust system…

scan0071 Engine testing procedures and instructions for various units and components.
View original record -2- New die cast main bearings in A.C.6. New big end bearings in A.C.6. High pressure scraper rings. Before running remove the special relief valve spring Ex.20773 and refit a standard spring EB.2135.…

scan0072 List of new parts fitted to an engine and the subsequent testing programme.
View original record -3- Rm/Swdl.6/AP.2.4.37 New parts are as follows:- (a) A.C.7. (std. Bentley) main bearings. (b) A.C.4. big end bearings. (c) Packard type of crankshaft. (d) L.section compression rings and high…

scan0073 Programme of test bed work for various engine units and their components.
View original record 1315 To Rm. c. to Rm/Mths. (struck out) c. to Rm/GTS. (struck out) Rm/Swdl.6/AP.9.4.37 PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.6/AP.2.4.37 No.5. Test Bed Ph.III. No.8 This unit to be next on…

scan0074 Required engine component tests, power curves, and preparations for various engine units.
View original record -2- consumption tests with various cylinder blocks, also to include test with standard block and tin plated pistons. ----- General (1) Report of tests of B.9 required. (2) Report of tests on Ph.No.3.…

scan0075 Programme of test bed work for the Ph.III No.10 Unit, detailing preparatory tests before being fitted into car 33.EX.
View original record 1315 To Rm; from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. Rm/Swdl.10/AP.19.4.37 PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.6/AP.9.4.37 No.5.Test Bed. Ph.III. No.10 Unit Test to be preparatory to fitting…

scan0076 Testing plans and specifications for various engine units and components.
View original record -2- Rm/Swdl.10/AP.19.4.37 Ph.III. No.16. Following completion of No.10 Unit No.16 will be the next unit on test. This is a complete new unit incorporating solid rockers and camshaft to suit LeC.5401…

scan0077 Assembly instructions for unit B.20 to replace an O.H.C. unit, and a list of related running reports.
View original record -3- Rm/Swdl.10/AP.19.4.37 B.20. Unit now being assembled as follows to replace O.H.C. on the bed. Crankcase with external strengthening channels and crankcase to suit. 4 bolt fixing of the rear main…

scan0078 Test bed work programme for a Phantom III No.16 Unit, detailing non-standard parts and test procedures.
View original record To Rm. c. to Rm/Mths. c. to Rm/CTS. 1315? Rm/Gry.3/JH.28.4.37. Programme of test Bed Work. Further to Rm/Swdl.10/AP.19.4.37. No.5 Test Bed. Phantom III No.16 Unit. The following special non standard…

scan0079 List of checks and modifications for engine valve gear lubrication and oil consumption.
View original record -2- (3) With silencing system check valves for bounce. (4) Check valve gear for noise with settings of .008, .012, .016, .020. (5) Lubrication of valve gear. In present form the amount of oil to the…

scan0080 Summary of endurance tests and instructions for engine units B.17, B.18, B.19, B.20, and Phantom III.
View original record -3- General. (1) Report of endurance on B.19. (2) " " Tests on Phantom III with curves. No.30 Bed. B.20. Test as previous memo. Rm/Swdl.10/AP.19.4.37. following hold up by millwrights. B.18. Complete…

scan0081 Test bed programme for a Phantom III No. 16 Unit, detailing special non-standard parts and planned work.
View original record To Rm. c. to Rm/Mths. c. to Rm/CTS. 1315 Rm/Gry.3/JH.28.4.37. Programme of test Bed Work. Further to Rm/Swdl.10/AP.19.4.37. No.5 Test Bed. Phantom III No.16 Unit. The following special non standard…

scan0082 List of checks and modifications for engine valve gear lubrication and performance.
View original record -2- (3) With silencing system check valves for bounce. (4) Check valve gear for noise with settings of .008, .012, .016, .020. (5) Lubrication of valve gear. In present form the amount of oil to the…

scan0083 Progress and instruction report on endurance testing for various engine units.
View original record -3- General. (1) Report of endurance on B.19. (2) " " Tests on Phantom III with curves. No.30 Bed. B.20. Test as previous memo. Rm/Swdl.10/AP.19.4.37. following hold up by millwrights. B.18. Complete…

scan0084 Urgent internal request for the manufacture of 24 distributor governor springs using a different wire gauge.
View original record To HPS. [handwritten] ✓ 1315- [/handwritten] Rm/Swdl.11/JH.10.5.37. Will you please instruct for 24 distributor governor springs to be made to E.52103 but in 18 S.W.G. (.048) wire. These are urgently…

scan0085 Programme of test bed work for an engine unit with special non-standard parts, prior to a 15,000 miles test.
View original record To.Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. 1315 Rm/Swdl.2/AP.10.5.37 PROGRAMME OF TEST BED WORK Further to Rm/Swdl.3/JH.28.4.37 No.5. Test Bed. Ph.III.No.13. Unit on test prior to being fitted in…

scan0086 Required tests and modifications for various engine units.
View original record -2- Ph.III. No.8 UNIT This unit which is again assembled as 'Continental' practice unit to be fitted on bed. Details of test in next memo. B.9 UNIT Oil consumption tests to be continued and report…

scan0087 Programme of test bed work for Ph.III. No.10 Unit, detailing new parts and test procedures.
View original record To Rm, from Rm/Swdl. c.c. Rm/Mths. c.c. Rm/OTS. 1315 Rm/Swdl.10/AP.19.4.37 PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.6/AP.9.4.37 No.5.Test Bed. Ph.III. No.10 Unit Test to be preparatory to…

scan0088 The status and testing specifications for various engine units and components.
View original record -2- Rm/Swdl.10/AP.19.4.37 Ph.III. No.16. Following completion of No.10 Unit No.16 will be the next unit on test. This is a complete new unit incorporating solid rockers and camshaft to suit LeC.5401…

scan0089 Details on the assembly of a B.20 unit to replace an O.H.C. unit, and a list of running reports for other units.
View original record -3- Rm/Swdl.10/AP.19.4.37 B.20. Unit now being assembled as follows to replace O.H.C. on the bed. Crankcase with external strengthening channels and crankcase to suit. 4 bolt fixing of the rear main…

scan0090 The programme of test bed work for various engine units and components.
View original record To Rm. from Rm/Swdl. c. Rm/Mths. c. to Rm/CTS. c. to Rm/Ed. (313) Rm/Swdl.11/AP.22.5.37 PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.2/AP.10.5.37 Ph.III.No.13. UNIT. Continue with tests as previous…

scan0091 Endurance test specifications for engine units B.19, B.24, and B.18, detailing new parts and testing parameters.
View original record -2- B.19 Following C.17 this unit which is now in test house to be fitted on bed for endurance. New parts include, new std. crankcase, main bearings in die cast A.C.6., big end bearings in AC.6. new…

scan0092 Programme of work outlining various engine test bed procedures and requirements.
View original record 1315 To Rm. from Rm/Swdl. C. to Rm/Mths. C. to Rm/CTS. C. to Rm/Ed. Rm/Swdl.11/AP.22.5.37 PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.2/AP.10.5.37 Ph.III.No.13. UNIT. Continue with tests as…

scan0093 Endurance test procedures and specifications for various engine units.
View original record -2- B.19 Following C.17 this unit which is now in test house to be fitted on bed for endurance. New parts include, new std. crankcase, main bearings in die cast A.C.O., big end bearings in AC.O. new…

scan0094 Requesting performance comparisons on a test bed are made with the standard silencer and chassis layout.
View original record To Rm/Mths. c. to Rm/CTS. c. to Rm/Ed. 1315 Rm/Swdl.2/JH.6.6.37. Rm. has requested that when carrying out performance comparisons on the test bed, the final comparison be made with the standard…

scan0095 Programme of test bed work for the Wraith III No.1 Unit, detailing investigations into engine components and performance.
View original record To Rm. c. to Rm/Mths. c. to Rm/CTS. c. to Rm/Ed. 1315 Rm/Swdl.12/JH.8.6.37. Programme of test bed work. Further to Rm/Swdl.2/AF.10.5.37. No.30 Bed. Wraith III No.1 Unit. Investigation of (1) Timing…

scan0096 Instructions for endurance checks and component testing on various engine units, including a Phantom III.
View original record -2- Rm/Swdl.12/JH.8.6.37. B-19. Before continuing endurance check following for information required on fitting of Bye-pass filter to B-24 for 15,000 miles test. Check pressure in relief valve pipe as…

scan0097 Programme of test bed work for the Wraith III No.1 Unit, investigating noise, performance, and lubrication.
View original record Handwritten top: Swdl - We should like a note re single eye work included in this report. Rm These note to include above. Swdl Handwritten left: 1315 To Rm. c. to Rm/Mths. c. to Rm/OTS. c. to Rm/Ed.…

scan0098 Instructions for endurance tests and checks on various engine components, including a Phantom III unit.
View original record -2- Rm/Swdl.12/JH.8.6.37. B-19. Before continuing endurance check following for information required on fitting of Bye-pass filter to B-24 for 15,000 miles test. Check pressure in relief valve pipe as…

scan0099 Programme of test bed work for a Wraith III No.1 Unit, detailing various endurance and performance trials.
View original record To Rm. from Rm/Swdl. c. to Rm/Mths. c. to Rm/GTS. c. to Rm/Ed. 131- PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.12/JH.8.6.37 No.30 Bed. Wraith III. No.1. Unit. (1) 2 hours running in trial 500 -…

scan0100 Continued testing instructions for B.24, Phantom No.3 Unit, and B.9, involving part fitting and performance tests.
View original record -2- Rm/Swdl.12/AP.15.6.37 B.24. continued. (1) Die cast A.C.6. main bearings. (2) New A.C.6. big ends with single hole feed to connecting rods. (3) Crank (Hykro) with 2 - 1/8 holes in each crank pin.…

scan0101 Power and detonation tests on a single cylinder unit, examining compression ratio, timing, and valve head design.
View original record -3- Rm/Swdl.12/AP.15.6.37 No.2.Bed. Single Cylinder Unit. (1) Power and detonation at 6.4:1 C.R. and effect of overlap and exhaust timing on low speed power on inclined valve head. (2.) Power and…

scan0102 Request to expedite job Ex.28029 for a torsional indicator to compare various crankshaft dampers.
View original record To HPS. from Rm/Swdl. 131/5 Rm/Swdl.9/AP.18.6.37 We are anxious to get the torsional indicator Ex.28029 as soon as possible in order to compare the merits of the various crankshaft dampers. Will you…

scan0103 Programme of test bed work for Wraith No.1 and No.2 units, detailing tappet noise investigation and new parts for a 15,000-mile test.
View original record To Rm. c. to. Rm/Mths. c. to Rm/CTS c. to Rm/Ed. 1315 Rm/Swdl.12/JH.24.6.37. Programme of test bed Work. Further to Rm/Swdl.12/JH.8.6.37. No.30 Bed Wraith No.2.Unit. Complete investigation of tappet…

scan0104 List of engine tests to be included, covering running-in, performance, and component checks for specific units.
View original record -2- The following tests to be included :- (1) Running in for new parts, noting tappet rotation and noise. (2) What is maximum clearance to obtain 30 H.P. degree of silence. (3) Power curves open…

scan0105 List of required engine tests, modifications, and component checks for various units.
View original record -3- Has Packard type crankshaft and new big ends and main bearings in AC.6. New standard pistons. Following the running in note half torsional period, produce to make obvious by reducing the friction…

scan0106 Page detailing tests including freezing a Bentley cylinder block and comparative power and detonation tests on a single-cylinder unit.
View original record 4. (C) Brico. (D) R.R. iron. (3) Freezing and unfreezing of Bentley or 30 H.P. cylinder block with 1 1/2 water in. No.2.Bed. Single Cylinder Unit. Effect on power by reducing exhaust duration and in…

scan0107 Request to refit a battery conduit wire on a Phantom III test bed due to shorting and fire risk.
View original record To Mr.Peskett from Rm/Swdl. 1315 Rm/Swdl.1/AP.30.6.37 No.5. TEST HOUSE Will you please send someone to refit a new wire into our battery conduit on the Phantom III. bed as the existing is shorting and…

scan0108 Programme of test bed work for a Wraith No.2 unit, detailing tests on gears, damper loadings, and oil heat flow.
View original record To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. c. Rm/Ed. Rm/Swdl.4/AP.30.6.37 PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.12/JH.24.6.37 No.30 Bed. Wraith No.2. Unit. Tests to be carried out are as…

scan0109 Test procedure document outlining oil temperature checks and investigations into crankshaft and unit performance.
View original record -2- (a) Temperature of oil draining from sump. (b) Temperature oil in pipe between the pump and sump. (c) Temperature of oil in pipe between sump and engine filter. (d) Temperature in engine filter…

scan0110 Engine testing procedures for the Phantom No.3, B.9, and a Single Cylinder Unit.
View original record -3- No.5. Bed. Phantom No.3. Included in all the power curves taken with the exhaust silencer take a reading of what power it is necessary to drop by retarding in order to cut out detonations at low…

scan0111 Request to replace an undersized water feed pipe for a D.P.X.4 dynamometer to resolve issues with holding a Ph.III unit at a constant speed.
View original record To EJJ/JV. from Rm/Swdl. 1515 Rm/Swdl.11./AP.1.7.37 No.5. TEST HOUSE. Will you please order sufficient 1.00 dia water feed pipe for the D.P.X.4. dynamometer in the above test house to replace the…

scan0112 Programme of test bed work for the Wraith III No.3 unit.
View original record To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. c. Rm/Ed. Rm/Swdl.8/AP.6.7.37 PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.4/AP.30.6.37 No.30.BED Wraith III. No.3. Unit. New unit for test with the…

scan0113 List of engine testing procedures and checks for various components and configurations.
View original record -2- (d) Thermometers in positions as for previous oil test, including temperature of oil as flinging from bearings. (e) Readings to be taken at 4000 R.P.M. full throttle with varying inlet oil…

scan0114 The position of and tests being carried out on Wraith III, II, and 25/30 units.
View original record To Rm. from Rm/Swdl. c. Rm/Gry. c. Rm/CTS. c. Rm/Mths. c. Rm/FD. POSITION OF AND TESTS BEING CARRIED OUT ON WRAITH III. AND II. UNITS ALSO 25/30. Test Bed Units. C.17. C.10 (Small bore) W.7.Z.…

scan0115 Specifications for various engine units detailing modifications and components.
View original record -2- Rm/Swd1.12/AP.13.7.37 C.15 (22.G.V.) Std. unit other than the following - RR.56. big end bearings and shims. Oil jet holes in connecting rods. Deturbulated head 5.8:1 comp. ratio. Delco governor…

scan0116 Specifications for various engine units including U-7-S, W.7.2, and Wraith II.
View original record -3- U-7-S. continued. Ex.19457 inlet valves, 1.45 dia. E.60260 exhaust valves 1.20 dia. Induction system similar to standard but with flanges reversed to suit head. Up-to-date drain scheme without…

scan0117 Specification sheet for Wraith III engine units No. 1, No. 2, and No. 3 (Test Bed).
View original record -4- Wraith III.No.1. Unit (26.G.V1) W/Mt. main bearings RR.56. liners. Crankshaft with 2 - .125 holes in pins. A.C.C. big ends single hole feed in bush (top half) Ex.28171. Unhardened engine gears in…

scan0118 Programme of test bed work for Wraith No. 4 and No. 3 engine units.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. c. Rm/Ld. Rm/Swdl.15/AP.16.7.37 PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.8/AP.6.7.37 No.30 Bed. WRAITH NO.4.UNIT. Unit built as a 'mock-up'…

scan0119 Technical progress report on various component tests and parts for multiple car models.
View original record -2- (3) Investigate bobbing of oil level indicator, also oil leak into the clutch pit. (4) Heat to oil test to be carried out in a similar way to that done on C.17 by F.Potts. C.17 Complete…

scan0120 Note concerning the completion of test tackle for fitting the No.6 unit to the Phantom III.
View original record -3- PHANTOM III Complete test tackle with a view to fitting No.6. unit which will be ready shortly. Rm/Swdl.

scan0121 Programme of test bed work for a Wraith III No.2 unit, focusing on oil leaks and supply distribution.
View original record To Rm. from Rm/Swdl. C. Rm/Mths. C. Rm/CTS. C. Rm/Ed. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.15/AP.16.7.37 WRAITH III. No.2.UNIT. Unit as removed from 25.G.Vl. chassis, No.3. taking its…

scan0122 Test procedures for engine units, including comparative analysis of exhaust and induction systems.
View original record -2- C.17. Give report on the comparative exhaust systems as taken on this unit. (a) 25/30. (b) Bentley. (c) Vauxhall. (d) Chevrolet. (e) Oldsmobile. With tappet setting of .006" check whether any…

scan0123 Request to Mr. Peskett to cover the benches in test house No.5 with aluminium sheet.
View original record To Mr.Peskett. 1315 Rm/Swdl.13/AP.3.8.37 Will you please cover the benches in No.5. test house with aluminium sheet. Rm/Swdl.

scan0124 Engine endurance and component testing report for Bentley and Phantom III units.
View original record -3- BENTLEY UNIT No.4. contd. 3 Exhaust valves in KE.965 and 3 in Silichrome X.C.R. (non stellited) Following 'running in' check curve of valve temperatures at high speeds full throttle with the…

scan0125 Test bed programme for the Wraith III No.5 Unit, detailing special parts and performance checks.
View original record To Rm. c.c. to Rm/Mths. c.c. to Rm/OTS. c.c. to Rm/Ed. Rm/Swdl.15/JH.18.8.37. Programme of test bed work. Further to our memo. Rm/Swdl.12/AP.3.8.37. No.30 Bed. Wraith III No.5. Unit. Unit to be tested…

scan0126 List of engineering tasks, checks, and tests for specific vehicle units and test beds.
View original record -2- Rm/Swdl.15/JH.18.8.37. (g) If no bounce up to 4500 r.p.m. try Rm.260 springs and E.88707 washers. (h) Timing gears are higher helix angle as instructed by EJH. who should be got on the job before…

scan0127 List of tasks for testing engine components including Bentley Units, pistons, and valve springs.
View original record -3- (3) refit the "Continental heads" and try the modified hot box, throttle body and induction system RS.462/3/4/5/6 in comparison with the std. system as instructed in the memo.…

scan0128 Testing reduced valve lift on the Phantom III engine to achieve quieter timing gears.
View original record To Rm/Swdl. from Rm. 1315 Rm.7/AP.19.8.37 In view of the results obtained on the Wraith with reduced valve lift, we consider that it is important to make similar tests on the Ph.III.,to see if we can…

scan0129 Status report on tests for experimental Bentley units, with specifications for the B-2 spare unit.
View original record To Rm. c. to Rm/Gry. c. to Rm/Mths. c. to Rm/FD. c. to Rm/OTS. Rm/Swdl.8/JH.30.8.37. Position of & tests being carried out on Experimental Bentley Units. Test Bed Units. B-4 B-9 B-13 Chassis Units.…

scan0130 Specifications for engine components of models B-3 and B-4, including post-endurance examination results.
View original record -2- B-3 (to be fitted in B-56-BW). Standard crankcase. Main bearing in M.C. as production) Big end bearing in AG.7.as production R.R. 36 shims. Crankshaft as production c - .2187 holes in journals and…

scan0131 List of specifications and modifications for various engine builds.
View original record -3- Increased inertia damper Rm.252. Standard production deturbulated head. Tempered Spring Co. Swedish Springs Rm.260. Nos. 2, 3 and 6 ex. valves in American Sil.XCR. not stellited to EB.970. No.1 4,…

scan0132 Specification sheet listing engine and vehicle components and settings.
View original record -4- Rm/Swdl.8/JH.30.6.37. Standard Rm.131 45° angle timing gears. Aerolite pistons (standard type) high pressure rings. Deturbulated cylinder head 6.4 : 1 - LeC.5022. Standard EB.2793 inlet valves…

scan0133 Specifications for two engine builds, B-18 for testing with Nelson Bohnalite pistons and B-19 for assembly.
View original record -5- Rm/Swdl.S/JH.30.5.37. B-18. Tests on bed with Nelson Bohnalite piston. Standard prod. crankcases. Crankshaft with 2 - .2187 di. holes in each journal and 1 - .2187 in crankpin EB.3163. Production…

scan0134 List of engine component specifications and modifications.
View original record -6- Std. No.1,2 and 3 exhaust valves EX.2970 (KE.965) " " No.4,5 and 6 " EX.26652 (KE.965). with "Brightray" seats in place of normal stellite. 45° angle timing gears. Large capacity production pump.…

scan0135 Specification sheet detailing modifications for engine builds B-22, B-23, and B-24.
View original record -7- Rm/Swdl.8/JH.30.8.37. B-22 J.B.IV. EC.5139 Packard type crankshaft with extra and opposite hole in each journal single hole in pins. Standard Hall's metal main bearings the intermediates modified…

scan0136 Programme of test bed work for a Wraith III engine and a Bentley Bed.
View original record To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. c. Rm/Ed. + 1315 Rm/Swdl.1/MH.3.9.37. PROGRAMME OF TEST BED WORK. Further to our memo Rm/Swdl.15/JH.18.8.37. No. 30 Bed. Wraith III No. 2. (1) Test the new…

scan0137 Program of engine component tests including rockers, pistons, camshafts and valve systems.
View original record 2. (5) Rockers with W/M bushes. This unit to be tested in normal manner with view to ultimately being fitted in a chassis. The following special tests to be included:- (1) Heat flow to oil in manner…

scan0138 Testing requirements for engine clearances, tappet noise, and a trial twin exhaust manifold.
View original record 3. Rm/Swdl. 1/WH.3.9.37. Included in tests should be the smallest clearance which can be used not to impair slow running. Tappet noise with various clearances should also be noted. An alternative twin…

scan0139 List detailing the status and tests being carried out on Phantom III experimental units.
View original record To Rm. c. Rm/Gry. c. Rm/Mths. c. Rm/CTS. c. Rm/FD. 131D RM/Swdl.12/WH.6.9.37. Position of and tests being carried out on Phantom III, Experimental Units. Test Bed Units. No. 3 Unit. No. 6 Unit. No. 8…

scan0140 Development tests and assembly notes for engine units No. 3, 4, and 6.
View original record 2. Unit No.3. Development tests on No. 5 bed. Obsolete type crankcase. Std. connecting rods, 2, 4, and 6 - Hoyts Z.S. W/M. Std. connecting rods, 1, 3, and 5 - Std. R.R. W/M. Std. W/M main bearings.…

scan0141 Specification list for engine units numbered 6, 8, 9, and 10, detailing their components and status.
View original record 5. Rm/Swdl.12/NH.6.9.37. Unit No. 6 continued. 4 ports cylinder heads. E.88447 RE.963 each valves (strengthened type) E.88165 Inlet valves S/SLV (Drilled up stems) Std. hydraulic gear camshaft. B side…

scan0142 List of specifications for engine units number 10, 11, and 12.
View original record 4. Unit No.10 continued. Std. pistons with L. section 2nd. comp. rings and high press. scraper rings. Rm.241 deturbulated 4 port heads 6.5 : 1 C.R. with oil drain pipes. Standard camshaft. KE.965…

scan0143 List of modifications and specifications for engine units 13 (32-EX) and 14.
View original record 5. Unit No. 13. (32-EX) Std. production crankcase. Rubber under top flange of cylinder liners. Modified tappet block clamp Lec.5371. Std. W/M main and big end bearings. Rods with modified panel…

scan0144 Specification sheet detailing the components and modifications for Units 14, 15, and 16.
View original record 6. Rm/Swd1.12/WH.6.9.37. Unit No.14. continued. R.R. type of semi split pistons. inc. inertia flywheel Rm.403. Clutch plate with thermoid facings. Ru.540 springs are used with Rm.400 top washers.…

scan0145 Specification for the 250-hour endurance type test for the Wraith engine.
View original record 1315 14.9.37. TYPE TEST FOR WRAITH. (1) Duration of 250 hrs. on test bed. (a) Each hour 40 mins. at 4,000 R.P.M. 18 mins. at 4,200 R.P.M. 2 mins. at 4,400 R.P.M. Full load for 7 hrs.) Half load for 2…

scan0146 List of procedures and conditions for endurance testing of an engine unit, page 2.
View original record -2- (h) Any development of roughness, timing gear rattle, piston knocks, valve gear noise or deterioration of slow running to be noted. Readjustment of carburettor, ignition setting or other feature…

scan0147 Continued list of parameters to be recorded during testing, such as temperatures, pressures, and consumption.
View original record -3- (4) Cont'd. (b) Oil inlet and outlet temperature. (c) Observed dyno. lift and air temp. (d) Oil pressure. (e) Petrol consumption as adjusted to the weakest maintained mixture strength. (f)…

scan0148 Programme of test bed work for the Wraith III No. 2 unit, detailing tests to address oil leaks and evaluate induction and exhaust systems.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/OTS. c. Rm/Ed. Programme of Test Bed Work Further to our memo Rm/Swdl.1/MH.).9.37. No.30. Test Bed Wraith III. No.2. Unit. (1) Test out the new improved…

scan0149 Instructions for endurance testing of various engine units and components.
View original record -2- C.17 continued (b) Fit 2 inlet cam camshaft Ex.24268 and repeat tests (a). No.5. Test House. Ph.III. No.6. Unit. No.3. to be removed and above unit fitted immediately received on test. The…

scan0150 Hold-up on No.2 Bed for modifications and subsequent continuation of tests.
View original record -3- Rm/Swdl.2/AP.15.9.37 No.2. Bed Enforced hold up for new end shutters being fitted, old walls knocked out. When completed, continue tests as in previous memo. Rm/Swdl.

scan0151 Requesting the urgent conversion of No. 30 Test Bed from a Bentley to a Wraith III configuration.
View original record To Mr. Peskett from Rm/Swdl. Rm/Swdl.13/MH.22.9.37. [Handwritten: + 1315] No.30 TEST BED. Will you please regard the convertion of the Bentley bed to Wraith III bed in accordance with the memo…

scan0152 Status report on tests for Wraith III, II, and 25/30 units, including test bed, chassis, and engine specifications.
View original record File 130 To Rm. from Rm/Swdl. c. Rm/Gry. c. Rm/Wym. c. Rm/Cis. c. Rm/Mths. POSITION OF TEST BEING CARRIED OUT ON WRAITH III. AND II. UNITS ALSO 25/30. Test Bed Units. G.17. C.10 (small bore) W.7.Z.…

scan0153 List of engine and component specifications for various units, including spare parts.
View original record 2. G.10 (Small bore) continued. RB.815. EB.1746 1.3 exhaust valve, EB.164 inlet, 1.4 dia. 104ccs. 6.32:1 C/R. 1g carbs. S.U. Standard 20/25. WF. R.R. flywheel and clutch G.15 (22.G.V.) Std. unit other…

scan0154 Specification sheet detailing components and modifications for Wraith II and Wraith III units.
View original record 3. Rm/Swdl.1/WH.23.9.37. Wraith II. No.1. (Spare Unit) Unit as designed. W/M. main bearings and steel shims. Hall's metal big ends. Up-to-date bushing of oil pump. Sludge trap, improved suction…

scan0155 Specification details for three different Wraith III engine units (No.2, No.3, and No.4).
View original record 4. Wraith III. No.2. Unit. (Test Bed) W/Mt. main brgs. RR.56. shims. A.C.G. Big end Bearings. Unhardened engine gears in S/ZMX. Cylinder head obsolete type without fan mounting. S/SLV. inlet valves…

scan0156 List of specifications and modifications for the Wraith III, No. 5 Unit.
View original record Rm/Swdl.1/RR.23.9.37. 5. Wraith III. No.5. Unit. (28.G.VI.) An extra .125 dia. hole in each crankpin, original .2187 hole being retained. W/L. main bearing with RR.56 shims. Big end bearings in A.C.b…

scan0157 Programme of test bed work for the Wraith III No.6 Unit, detailing new features and test procedures.
View original record File 1315 R... From Rm/Swdl. Rm/Mths. Rm/CTS. Rm/Id. Rm/Swdl.12/MH.30.9.37. PROGRAMME OF TEST BED WORK. Further to our memo Rm/Swdl.2/AP.15.9.37. No. 30 Bed. Wraith III. No.6 Unit. New unit…

scan0158 Engine component testing instructions and modifications for various units.
View original record 2. Rm/Swdl.12/MH.30.9.37. When he is satisfied with the gears get J.Warwick to adapt the scheme Rs.629/30. This cuts out the spring drive and makes the slipping action an independent feature. Run for…

scan0159 Series of engine component testing procedures and instructions.
View original record 3. Rm/Swdl.12/MH.30.9.37. (6) Oil retainer device to prevent oil leak from rear main bearing to Rm.459. Unit will require running in for several hours then continue endurance as follows - (a) 25 hours…

scan0160 Request for data and special brackets to test a Phantom III unit with a Sommers indicator and dampers.
View original record 4. Rm/Swdl.12/MH.30.9.37. This data is required as soon as possible and we are anxious to try out Ph.III unit with Sommers indicator and various dampers. Special brackets in order to house Ph.III on…

scan0161 Programme of test bed work for Wraith III engines No. 6 and No. 2, detailing endurance runs and modification tests.
View original record To RM. from Rm/Swdl. c. RM/Mths. c. RM/CTS. c. RM/Ed. Rm/Swdl.4/M.H.8.10.37. [Handwritten]: 1313 PROGRAMME OF TEST BED WORK. FURTHER to our memo Rm/Swdl.12/WH.30.9.37. No. 30 Bed. Wraith III. No.6…

scan0162 Engine and component testing procedures and endurance test updates.
View original record 2. Rm/Swdl.4/WH.8.10.37. Wraith III. No.2 Continued. Each 10 hours to comprise - 7 hrs full load. 2 hrs 1/2 load. 1 hr 1/4 load. After 20 hours remove cylinder head and crack test exhaust valves. Oil…

scan0163 Request to rewire the charging circuit for the Wraith No. 30 test house No.2 bed.
View original record HPS. 1315/ Rm/Swdl.2/JH.7.10.37. Will you please rewire the charging circuit, recently dismantled during bed convertion to Wraith No. 30 test house No.2. Bed. Rm/Swdl.

scan0164 Request for a pane of glass to be installed in the window of No. 5 Test House.
View original record To Mr. Bowers from Rm/Swdl. 1315 Rm/Swdl.4/MH.18.10.37. No.5 TEST HOUSE. Will you please have a pane of glass put in a window in the above test house.

scan0165 Programme of test bed work for the Wraith III No. 6 engine, detailing tests for distribution, oil consumption, and the oil filter.
View original record To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/OTS. c. Rm/Ed. 1313 Rm/Swdl.8/MH.17.11.37. PROGRAMME OF TEST BED WORK. Further to our memo Rm/Swdl.11/MH.27.10.37. NO. 30 BED. WRAITH III NO. 6. Distribution.…

scan0166 Test and observation schedule for the running-in of the Wraith III No. 7 Unit.
View original record -2- WRAITH III NO. 7 UNIT. This new unit is representative of the first 6 cars to be made. During the running in, which should be carried out with P.4 and hard oil mixture observe the following - (a)…

scan0167 Test schedule for various engine units, including damper comparisons, clutch tests, and bearing endurance.
View original record -3- (1) Check engine for periods etc. Further work dependent upon the results obtained. Any troubles and alterations, no matter how small to be noted in order that they may be corrected in future…

scan0168 Test report on Buick type pistons and a trial of a Bentley 50 type cylinder head.
View original record -4- Rm/Swdl.8/MH.17.11.37. NO. 2 BED. B.4 UNIT. Complete tests on Buick type of pistons and then revert to standard Bentley assembly. Under these conditions run endurance of 25 hours at full throttle…

scan0169 Revision of programmes for Experimental Chassis Test Beds No. 33 and No. 5.
View original record 1315. To B.J.J. from Hs/LS. Copy to Hs. Copy to Rm. Piles SWD 2 Experimental Chassis Test Beds. It has been agreed to revise the programmes for Numbers 33 and 5 Beds as follows:- No.33 Bed. The…

scan0170 Request to fit a 25/30 steering roller, produced by Hoffmanns, to the rig steering box.
View original record Handwritten: 1315. ? X SS50 (struck through) To HPS. from Rm/FJH. c. HPS/W.Bell. Rm/FJH.8/MH.1.12.37. RIG STEERING BOX. Will you please fit to the rig steering box the 25/30 steering roller produced…

scan0171 Programme of test bed work for Wraith III engine units No. 6 and No. 8.
View original record To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. c. Rm/Ed. 1315 Rm/Swdl.2/MH.10.12.37. PROGRAMME OF TEST BED WORK. Further to our memo Rm/Swdl.8/MH.17.11.37. WRAITH III NO.6 UNIT. Continue with…

scan0172 Test procedures and modifications for Wraith III and PH.III engine units.
View original record -2- WRAITH III NO.8 UNIT continued. Take power curve open exhaust and with silencer. Fit Exs.312 and 313 valve spring and spring damper in which scheme the bottom washers are deleted. Following the…

scan0173 Units available for oil consumption, piston, and cylinder bore wear tests.
View original record -3- Rm/Swdl.2/WH.10.12.37. B.4 UNIT. Unit for oil consumption and piston tests in accord- ance with Rm/Mths. W.III NO.1 UNIT. Above unit out of 26.G.VI is available now for cylinder bore wear tests in…

scan0174 List and specification sheet for experimental Bentley and Phantom III engine units.
View original record To Rm. c. to Rm/Gry. c. to Rm/Mths. c. to Rm/FD. c. to Rm/CTS. 1315 Rm/Swdl.1/JH.20.12.37. EXPERIMENTAL BENTLEY UNITS. Test Bed Units. B.4. B.9. B.11 (Small bore) B.23. (OHC). Chassis Units. B.3.…

scan0175 List of specifications and tests for various engine components and builds.
View original record -2- No. 5 - 8 EB.3256 coiled R.R. on small machine. No.9 - 12 EB.3256 made by T.S.C. in temporary use on production. B.4. Oil consumption and piston tests in No.5. A.C.2. main bearings. A.C.7 (Std)…

scan0176 List of engine component specifications, part numbers, and clearances.
View original record -3- Std. A.C.7 big end bearings and con. rods .00225 clearance on crankpins. Increased inertia damper to LeC. reduce to 25% above std. (Rm.131). 45° angle timing gears. Std. deturb. head, 6.4 : 1 C.R.…

scan0177 List of specifications for various engine components, modifications, and test configurations.
View original record -3- Rm/Swdl.1/JH.20.12.37. Std. No.1, 2 and 3 exhaust valves EB.2970 (KE.965). No.4,5 and 6 " " EX.26652 (KE.965) with "Brightray" seats in place of normal "stellite" 45° angle timing gears. B. & B.…

scan0178 List of specifications for engine components, including crankshafts, cylinder heads and pistons for Phantom III and Spare Test Units.
View original record -5- Rm/Swdl.1/JH.20.12.37. Hykro crankshaft with 2 - .125 dia. holes in each pin and 2 - .2187 in each journal. Big end bearings in centri cast AC.6 with single centre hole in rod half. Cylinder block…

scan0179 List of specifications for the assembly of Unit No.6 for endurance testing.
View original record -6- Nos 4, 5, and 6 tappet blocks non plated, cloudburst hardened tappets. These were run in on Hi press oil. Continental 6.5 : 1 ratio cylinder heads Rm.160. E.88447 strengthened KE.965 valves.…

scan0180 Specification sheet for the assembly and testing of engine units No. 12 and No. 13.
View original record -7- Unit No.12. To be assembled for torsion tests with Summers Indicator. Std. production crankcase. Std. crank with special grinding for indicator. Std. W/M main and big end bearings also std.…

scan0181 List of specifications and modifications for engine unit No. 14.
View original record -8- Rm/Swdl.1/JH.20.12.37 Solid rocker gear, camshaft E.88760 to suit. Not latest water passage 4 port head. E.88447 strengthened KE.965 exhaust valves. E.88782 solid stem inlet valves (S/SLV).…

scan0182 List of modifications and component specifications for various engine builds, including Unit No.16 (35-EX).
View original record -9- ROCKER gear to LeC.5441 and lubrication LeC.5444 with modifications Rm/380/1/2. Modified bottom tappets without springs LeC.5667 (these if possible). Cylinder liners A.1,2, and 3. Std.…

scan0183 Notes on a Fabroil idler, cork oil level float, standard flywheel and clutch, and a filler cap.
View original record -10- Rm/Swdl.1/JH.20.12.37. Fine grain Fabroil idler. Cork oil level float Lec.5506. Std. production flywheel and clutch. Filler cap Lec.5481. Rm/Swdl.

scan0184 General development position summary on Phantom III and Wraith experimental cars and ongoing tests.
View original record Sg. from Rm. Hs. c. By. c. RHC. c. Da. c. Mx. 1315 Rml/R.29.12.37. GENERAL DEVELOPMENT POSITION. The following is a brief summary of the present position of development work:- P.III. We have one…

scan0185 Progress report on vehicle component testing and improvements for the Wraith and Bentley models.
View original record -H- Hml/R.29.12.37. (4) Work to improve the steering generally. By altering the pivot lean and the flexibility of the steering column, we have now got a very light steering, directionally stable and…

scan0186 Progress report on projects B.III and B.50, including chassis, engine testing, and gearbox development.
View original record -3- B.III. We have a frame for the first car, and the Drawing Office is clear of instructions for this chassis. We do not expect that the body will have to wait an appreciable time for the chassis. We…

scan0187 Programme of test bed work for Wraith III units, focusing on oil consumption and piston ring issues.
View original record To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. c. Rm/Ed. PROGRAMME OF TEST BED WORK. Further to our memo Rm/Swdl.2/MH.D.12.37. WRAITH III NO.6 UNIT. NO.30 BED. (1st.BED). Following the transfer of the…

scan0188 Testing procedures and observations for Wraith III engine units No. 8 and No. 9.
View original record -2- WRAITH III NO.8 UNIT - CONT'D. (1) "Running in" (Mot.C). (2) Power open exh. and with silencer (std.). (3) 1 hr. oil consumption at 4000 R.P.M. (Mot.C). (4) Gears to be quietened and observations…

scan0189 Progress report on endurance testing, component changes, and fuel comparison for various engine units.
View original record -3- WRAITH III NO.2 UNIT. This unit is being assembled for valve gear endurance, the valves, cylinder head, camshaft, reduced rocker ratio etc. are standard. Condition of endurance as previously run…

scan0190 Test schedule for engine components including piston comparisons, bore wear, and exhaust system analysis.
View original record -4- Rm/Swdl.1/WH.3.1.38. B.4 UNIT. CONT'D. (2) Continue consumption and piston comparison. WRAITH III NO.1. (rig engine). Continue bore wear tests. WRAITH II NO.1. (rig engine). In view of piston…

scan0191 Continuation of a report on exhaust system tests, comparing 3-port and 4-port systems for head design B.111.
View original record -5- Rm/Swdl.1/MH.3.1.38. EXHAUST SYSTEM TESTS - CONT'D. The real object is what improvement can be effected on the 3 port system and its comparisons with a 4 port system in order to give head design…

scan0192 Renovation of the No.5 Test House to fit the new B.50 engine on the Phantom III test bed.
View original record To EJJ/JV. from Rm/Swdl. 1315. Rm/Swdl.3/MH.26.1.38. NO.5 TEST HOUSE. Whilst the Ph.III test bed is being renovated along with the installation of the universal tackle on the Bentley bed, will you…

scan0193 Programme of test bed work for a B.III No.1 Unit, detailing power comparison and performance improvement tests.
View original record 1315 To Rm. c. to Rm/Mths. c. to Rm/CTS. c. to Rm/D.Lee. Rm/Swdl.1/JH.27.1.38. PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.1/WH.3.1.38. No.30 Bed. B.III No.1 Unit. Following initial power…

scan0194 Series of engine tests, modifications, and future test plans for various units.
View original record (2) These tests should be tried with cam balancer on the original keyway and not on the new 3° offset one. Is fore and aft rattle of camshaft in evidence as on Wraith which was cured by the end thrust…

scan0195 Endurance test specifications and procedures for the Phantom III No.6 engine unit.
View original record -3- Rm/Swdl.1/JH.27.1.38. Marking the fixed and free wheel of damper note relative movement by Rotorscope, the indicator arm being removed for this test. With the arm in position try stronger…

scan0196 Engine endurance test schedule for exhaust system comparisons on a Phantom III unit.
View original record -4- Rm/Swdl.1/JH..27.1.38.. 30 mins. 4,000 R.P.M. 25 mins 4250 and 5 mins 4500. Every 5 hrs. to comprise 3 1/2 hrs. full throttle. 1 hr 1/2 load. 1/2 hr 1/4 load. B.23. O.H.C. Following endurance on…

scan0197 Status report on the positions and tests being carried out on Wraith and Bentley III units.
View original record To Rm. From Rm/Swdl. c. Rm/Wym. c. Rm/CTS. c. Rm/Mths. 1315 Rm/Swdl.1/MH.7.2.38. POSITIONS OF AND TESTS BEING CARRIED OUT ON WRAITH & BENTLEY III UNITS. Test Bed Units. B.III No.1. W.II No.1. W.III…

scan0198 List of specifications and modifications for various Wraith II and Wraith III engine units.
View original record -2- Wraith II No.2 Unit (25.G.VI). As No.1 unit but with - W/M. main bearings with RR.56 solid shims. Hall's metal big ends with RR.56 shims. Swedish wire valve springs. - 1 - 6 Rm.260 made by…

scan0199 Specification and modification notes for Wraith III engine units No.2, No.3, No.4, and No.5.
View original record -3- Wraith III No.2 (Valve endurance) Cont'd. One .218 and one .125 hole in each crankpin. Tappet bushes 1 - 4 in RR.50 5 - 8 in I/C 9 -12 in A/F. Pistons with high press rings. Wraith III No.3 unit…

scan0200 Specification sheet for Wraith III units No. 5, 6, and 7.
View original record -4- Wraith III No.5 Unit (28.G.VI) Contd. Inlet valves S.65 material. Rs.540 Swedish wire springs coiled at RR. Rm.400 top washers. Bottom tappets in I/C blanks produced by C. & B. Smith. Conical base…

scan0201 Specifications and exceptions for various Wraith III and Bentley III engine units.
View original record -5- Rm/Swdl.1/MH.7.2.38. Wraith III No.8 (Test Bed unit). Latest unit as No. 7 with the following exceptions. Pistons with high pressure scraper and compression rings L section 2nd. ring. Original…

scan0202 Programme of test bed work for B.III No.1 and Wraith III No.2 engine units.
View original record To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. c. Rm/D.Lee. Rm/Swdl.2/MH.2.3.38. 1315 PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.1/JH.27.1.38. NO.30 BED. B.III NO.1 UNIT (a) bed. Rm/CTS. (1) Complete…

scan0203 Test specifications for Wraith III and Wraith II engine units, detailing modifications and running procedures.
View original record -2- WRAITH III NO. 1 UNIT. This unit has been fitted with special arrangement of bottom tappets, all are vertical with flat base. 1 - 4 As original Wraith. 5 - 8 Front face of cam in line with C/L of…

scan0204 Instructions for comparative bore wear tests on a Wraith III unit and exhaust system investigation on a No. 2 Bed unit.
View original record -3- WRAITH III NO.1. This unit is being fitted with special cylinder liners (Phosphur Chrome v Sheepbridge) for comparative bore wear tests etc. on rig. Investigate and report on piston failures on…

scan0205 Results of test bed trials on engine suppressors and their durability.
View original record To By/RD. from Rm/Swdl. c. Rm/RC. 1315 Rm/Swdl.4/MH.3.3.38. From the attached report of the test bed it will be seen that under normal conditions there is no detrimental effect on the running of the…

scan0206 Test report on the effect of Dubilier suppressors on Bentley engine performance.
View original record DUBILIER SUPPRESSORS. Spark suppressors have been tested on a Bentley test bed unit to determine their effect on the performance and general running of the engine. Dubilier suppressors of 15,000 Ohms…

scan0207 Programme of test bed work for B.III and Wraith III engine units.
View original record To Rm. from Rm/Swdl. c. Rm/Mtns. c. Rm/CTS. c. Rm/D.Lee. 1315 Rm/Swdl.1/MH.28.3.38. PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.2/MH.2.3.38. NO.30 BED. B.III NO.1 UNIT (a) bed. (1) Continued…

scan0208 Test procedures for a Bentley III engine unit and a single cylinder unit on test beds.
View original record -2- NO. 5 BED. BENTLEY III NO. 3 UNIT. This unit as fitted on bed for lining up purposes has incorrect cylinder head which should be removed and correct one fitted (.030 gasket in Klingerite which…

scan0209 Instructions for exhaust system comparisons on an OHC Bentley and endurance testing for a B.4 unit.
View original record -3- Rm/Swdl.1/MH.28.3.38. OHC. BENTLEY. Continue with exhaust system comparisons as discussed. Include also an analysis of present Bentley system. Unit to be removed as soon as bearing unit is ready.…

scan0210 Programme of test bed work for engine units B.III and Wraith III, focusing on valve bounce and torsional oscillation.
View original record 1315 To Rm. from Rm/Swdl. c.c. Rm/Mths. c.c. Rm/GTS. Rm/Swdl.2/MH.27.4.38. PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.1/MH.28.3.38. No. 30 BED. B.III NO.1 Unit (a bed). On completion of previous…

scan0211 Test and modification notes for Wraith III engine units, including special parts.
View original record -2- Rm/Swdl.2/MH.27.4.38. WRAITH III No. 1 UNIT - Cont'd. Compared with its previous condition on which diagrams were checked the flywheel inertia has been reduced by 50% to raise the major period.…

scan0212 Endurance testing procedures for a distributor and camwheel, with additional instructions for reports and a Bentley Bed unit.
View original record -3- Rm/Swdl.2/MH.27.4.38. W.III. NO.4 - Cont'd. Spring driven up to date R.R. distributor. Attwaters material camwheel, with hardened crank and dynamo pinions. Endurance to consist of 50 hrs. (a) each…

scan0213 Endurance testing procedures and special parts fitted for a B.4 unit and a single cylinder test.
View original record -4- Rm/Swdl.2/MH.27.4.38. B.4 UNIT. This unit to be run endurance and has following special parts fitted. Main bearings, No. 1, 3, 5 and 7 die cast AC.9. No. 2, 4, and 6 Centri cast AC.9. Big ends 3…

scan0214 Reports on Jaguar and Bentley exhaust systems, crankshaft oscillations, and engine timing adjustments.
View original record -5- Rm/Swdl.2/MH.27.4.38. GENERAL. (1) Report on Jaguar exhaust systems compared with our own 2 Bentley systems, but with same manifolds. (2) Report on crankshaft torsional oscillations including…

scan0215 Request to re-wire connections between the starter motor, switchboard, and dynamo in No. 30 Test House.
View original record 1315? To HPS. from Rm/CTS. NO.30 TEST HOUSE. Will you please re-wire the connections between the starter motor and switchboard, and the connections to the dynamo, on No.1 test bed in the above test…

scan0216 The purchase of six glass thermometers for chassis experimental test beds.
View original record 1315 To Roy. from Rm/Swdl. c.c. G/JWH. Rm/Swdl.8/MH.17.5.38. Will you please order 6 glass thermometers from W.George Ltd. for use on the chassis experimental test beds. These to have the normal range…

scan0217 Programme of test bed work for a B.III No.1 Unit, detailing investigations into exhaust systems and cylinder head configurations.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. Rm/Swdl.7/MH.21.5.38. PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.2/MH. 27.4.38. NO. 30 BED. B.III No.1 UNIT (a Bed). Continue double exhaust system…

scan0218 Progress report on the testing and development of B.III and Wraith III engine units.
View original record -2- B.III No.1 UNIT (a bed) -Cont'd. By when above are complete pistons with a raised crown will be available for trial. Object of this is to have identical heads for B.III and Wraith yet with a…

scan0219 Test procedures and parts fitted for B.III No. 3 unit and Wraith III No. 7 unit.
View original record -3- Rm/Swdl.7/MH.21.5.38. B.III NO. 3 UNIT - Cont'd. Tests. (a) Open exhaust power curve on best timing ½ tooth late, at the same time including spark advance at T.D.C. setting. (b) With silencer…

scan0220 Engine testing report detailing procedures for Wraith III, Oldsmobile, and single-cylinder units.
View original record -4- WRAITH III NO. 7 - Cont'd. (c) With std. silencer check for detonations at T.D.C. setting with Redline, Shell and Ethyl, also complete speed range of automatic advance degrees. (d) Oil consumption…

scan0221 Instructions for re-assembling a B.III NO.4 unit to compare its standard head against an adapted B.III head.
View original record -5- Rm/Swdl.7/MH.21.5.38. B.III NO.4 This unit isto be re-assembled to compare its existing std. head against B.III head which can be adapted by leaving out several studs. Comparison to consist of…

scan0222 Status report on the position and tests being carried out on Wraith and Bentley III units.
View original record 1315 To Rm. c. to Rm/Wym. c. to Rm/CTS. c. to Rm/Mths. Rm/Swd1.17/JH.3.6.38. POSITION OF AND TESTS BEING CARRIED OUT ON WRAITH AND BENTLEY III UNITS. Test Bed Units. WRAITH III. No.1 (Temporary in…

scan0223 Specification details for three different Wraith III engine units.
View original record -2- Rm/Swd1.17/JH.3.6.38. Wraith III No.1 Unit (temporary in 29.G.VI). Obsolete type crankcase with loose liner cylinder block. No. 1, 2, and 3 Sheepsbridge. No. 4, 5, and 6 Phosphur chrome. AC.6…

scan0224 Specifications and details for Wraith III engine units No. 3, No. 4 (Test Bed), and No. 5.
View original record -3- Wraith III No.3. Unit (24.G.VI) Cont'd. AC.6. big end bearings. Crank with 2 - .125 holes in each pin. S/SLV inlet valves KE.965 (Stell.) exhaust valves. Camshaft with extended toes R.S.607. Std.…

scan0225 Specification updates for Wraith III units No. 5, 6, 7, and 8.
View original record -4- Wraith III NO.5 (28.G.VI) Cont'd. Venturi inlet port cylinder head. Unhardened timing gears with Attwaters fibre camwheel (balancer deleted) Camshaft end thrust plunger. Original type valve…

scan0226 Specification sheet detailing modifications and components for various Wraith and B.III engine units.
View original record -5- Rm/Twdl.17/JH.3.6.38. Wraith No.8 Unit (25.G.VI) Cont'd. T section 2nd. ring. Original normal section big ends. AC.6 with keyed shims. End thrust plunger on camshaft. Cam balancer removed.…

scan0227 Specifications for B.III No.2 and No.3 Units, detailing component changes and exceptions.
View original record -6- B.III No.2 Unit 7.B.V. Cont'd. Delco ignition distributor. Carbs. 1 1/2 bore SU's with auto starter carb. B.III No.3 Unit (1st. B.50 chassis). As B.III No.2 except. High oil level indicator…

scan0228 Programme of test bed work for the B.III No.1 unit, detailing valve head modifications and power comparisons.
View original record 13/5 To Rm. from Rm/Swdl. c. Rm/Mths. c. Rm/CTS. Rm/Swdl.2/MH.14.6.38. PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.7/MH.21.5.38. NO. 30 BED. B.III NO.1 UNIT (a) bed. (1) Complete the power…

scan0229 Test schedule and special feature modifications for Wraith III and B.III engine units.
View original record -2- WRAITH III NO.4 UNIT (a) Bed. This unit ex (b) bed to be fitted whilst B.III is removed. Tests to be carried out are:- (a) Comparison of tulip and std. shaped inlet valves in the small valve head…

scan0230 Test procedures for B.III NO.5 and W.III NO.9 units, including endurance and oscillation tests.
View original record -3- B.III NO.5 UNIT (b) bed - Cont'd. On being returned to test following short running in and repeat power curve, also valve bounde endurance to consist of 20 hours total, each 1 hr. comprising, 30…

scan0231 Test procedures for various engine units, including crank oscillation, detonation, and compression ratio checks.
View original record -4- W.III NO. 9 UNIT - Cont'd. (f) Crank oscillation variation with ignition advance. Try up to drop of 10% power by retarding. (g) Crank oscillation with harmonic damper which is being produced in…

scan0232 Internal request to order 2 dozen Tecalemit filters for use on experimental chassis unit beds.
View original record 13/5 To Roy. from Rm/Swdl. c.c. G/JWH. Rm/Swdl.17/MH.29.6.38. Will you please order 2 dozen Tecalemit filters of the type O.F.1054. 123/12 for use on the Experimental Chassis unit beds. Rm/Swdl.

scan0233 Requesting completion dates for various engine development jobs.
View original record 1315? To HPS. from Rm/Swdl. Rm/Swdl.8/MH.12.7.38. We would like to get an idea as to when the following jobs are expected to be completed. B.III. (1) Camshaft as instructed in memo…

scan0234 Programme for test bed work detailing engine component testing procedures.
View original record To Rm. from Rm/Swdl. c. F.Hallam. 1315 PROGRAMME FOR TEST BED WORK. Further to Rm/Swdl.2/MH.14.6.38. NO.30 BED. B.III. NO.1. (a) bed. (1) Test and pass off when O.K. "mock up" of latest induction…

scan0235 Test and assembly procedures for Wraith III No.4 and B.III No.5 units.
View original record -2- WRAITH III NO.4 UNIT (b bed) - Cont'd. end of camshaft and fit wheelcase with glass disc in preparation for camshaft out of truth tests. B.III NO.5 UNIT. This unit is being assembled in shop for…

scan0236 Engine testing procedures and the dispatch of aerolite pistons and L-section rings.
View original record -3- Rm/Swdl.10/MH.14.7.38. GENERAL - Cont'd. Together with the above despatch the set of - 4¼ litre tin plated aerolite pistons. 12 'L' section rings for 3½ litre which have been completed. NO.2 TEST…

scan0237 Status report on the position and tests being carried out on Wraith and Bentley III units.
View original record To Rm. c. to Rm/Wym. c. to Rm/GTS. c. to Rm/Mthns. 13/5 Rm/Swd1.17/JH.3.6.38. POSITION OF AND TESTS BEING CARRIED OUT ON WRAITH AND BENTLEY III UNITS. Test Bed Units. WRAITH III. No.1 (Temporary in…

scan0238 Specification sheet detailing modifications for three Wraith III engine units.
View original record -2- Rm/Swdl.17/JH.3.6.38. Wraith III No.1 Unit (temporary in 29.G.VI). Obsolete type crankcase with loose liner cylinder block. No. 1, 2, and 3 Sheepbridge. No. 4, 5, and 6 Phosphur chrome. AC.6…

scan0239 Specification sheet for Wraith III engine units No.3, No.4, and No.5.
View original record -3- Wraith III No.3. Unit (24.G.VI) Cont'd. AC.6. big end bearings. Crank with 2 - .125 holes in each pin. S/SLV inlet valves KE.965 (Stell.) exhaust valves. Camshaft with extended toes RS.607, Std.…

scan0240 Summary of specifications and modifications for Wraith III units No. 5, 6, 7, and 8.
View original record -4- Wraith III NO.5 (28.G.VI) Cont'd. Venturi inlet port cylinder head. Unhardened timing gears with Attwaters fibre camwheel (balancer deleted) Camshaft end thrust plunger. Original type valve…

scan0241 Specification notes for Wraith and B.III development units.
View original record -5- Wraith No.8 Unit (25.G.VI) Cont'd. L section 2nd. ring. Original normal section big ends. AC.6 with keyed shims. End thrust plunger on camshaft. Cam balancer removed. Original Fabroil camwheel.…

scan0242 Specification sheet detailing modifications for B.III No.2 and No.3 units.
View original record -6- Rm/Swd1.17/JH.3.6.38. B.III No.2 Unit 7.B.V. Cont'd. Delco ignition distributor. Carbs. 1 1/2 bore SU's with auto starter carb. B.III No.3 Unit (1st. B.50 chassis). As B.III No.2 except. High oil…

scan0243 Lack of a suitable rear mounting for standard gearboxes on Wraith or Bentley III models in the test house.
View original record 1318 To EJJ. from Rm/Swdl. Rm/Swdl.2/MH.9.8.38. NO. 30 TEST HOUSE. We have no rear mounting suitable to house the up to date standard gear box on Wraith or Bentley III. Occasionally we want to run…

scan0244 Programme of test bed works for comparing various camshafts and other engine components.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/CTS. c. No.30. c. No.5. c. No.2. PROGRAMME OF TEST BED WORKS Further to Rm/Swdl.10/MH.14.7.38. No.30 TEST HOUSE. B.III No.1 (a bed) Direct comparisons to be taken…

scan0245 List of test procedures and modifications for engine units W.III NO.4 and W.III NO.9.
View original record -2- W.III NO.4 - Cont'd. (1) Try to repeat condition as rejected from 26.G.VI. (2) Run 1 hr. oil consumption and repeat test (1). (3) Remove pistons, scraper ring off one piston with poor bedding to…

scan0246 Engine test procedures and progress notes for B.III No. 5, B.III No. 9, and B.60 units.
View original record -3- B.III No.9 - Cont'd. (3) Check gears for silence. (4) Cure all leaks and generally tune up. B.III NO.5 (15,000 miles). Unit to be finally tested prior to fitting in B.B.V. Tests required are:- (1)…

scan0247 Test procedures for engine units W.III No.1 and B.II No.4, detailing bore wear tests, coupling modifications, and piston comparisons.
View original record -4- W.III NO.1. Continue with bore wear tests on liner engine, subsequent runs dependent on wear obtained. A dynamo coupling has been made to SCD.804 which has increased diameter of coupling rubbers…

scan0248 Comparison of single cylinder heads for power and detonation.
View original record -S- Rm/Swdl.2/MH.10.9.38. SINGLE CYLINDER. Complete comparison of cylinder heads as discussed for power and detonation. Rm/Swdl.

scan0249 Requesting an overhaul of a dynamo removed from Wraith No.4 after it failed endurance testing.
View original record X 1315 To HPS. Rm/CTS.4/JH.12.9.38. Will you please overhaul dynamo, removed from Wraith No.4. This dynamo failed during 20 hours endurance. Rm/CTS.

scan0250 Requesting the return of a 'Jaeger' rev counter for overhaul.
View original record 1315? To HPS/A.Moore from Rm/Swdl. Rm/Swdl.18/MH.22.9.38. Will you please return the "Jaeger" rev counter 32177, we have handed you, to the makers to be overhauled. Rm/Swdl.

scan0251 Programme of test bed work for Wraith III and B.III engine components, including damper comparisons and cylinder head tests.
View original record 1315- To Rm. c. to Rm/GTS Rm/Swdl.7/JH.25.10.38. Programme of Test Bed Work. Further to Rm/Swdl.2/MH.10.9.38. No.30. Bed. Wraith III No.1 (a) bed. Unit for comparison of dampers. (a) Take torsional…

scan0252 Test procedures and investigations for combustion chamber heads and the B.60 No.1 Unit.
View original record -2- Rm/Swdl.7/JH.25.10.38. (b) Fit new strengthened combustion chamber head, carry out 50 cycles, remove and examine for cracks. Several more heads of this type will be loaned to us for test as (b).…

scan0253 Test procedures for Wraith III and Bentley II engine units, focusing on bore wear, piston, and ring comparisons.
View original record -3- Wraith III No.1 Unit. Bore wear tests, 3 liners, in static cast std. R.R. block iron and 3 liners in static cast Chr.Md. alloy. To serve two purposes, carry out tests under condition (c) of head…

scan0254 Proposal to send four blocks for fitment to customer cars that exhibit excessive bore wear.
View original record -4- Rm/Swdl.7/JH.25.10.38. If approved, the remaining 4 blocks to be sent to GWH. for fitment to customers cars who are reputed to wear bores excessively. Rm/Swdl.

scan0255 Requesting the return of a stopwatch, engraved 'experimental car unit test', to the makers for repair.
View original record 1315 To HPS/A.Moore from Rm/Swdl. Rm/Swdl.2/MH.28.10.38. Will you please return the stop watch we hand you herewith to the makers for repair. The watch is engraved experimental car unit test K.10.…

scan0256 Status report on tests being carried out on Bentley III, Bentley 60 and Bentley II engine units.
View original record 1315 To Rm. c. to Rm/Sys. c. to Rm/CTS. POSITION OF & TESTS BEING CARRIED OUT ON BENTLEY III & BENTLEY 60 & BENTLEY II UNITS. Bentley III No.1 (Test bed). Main bearings without shims 'mock-up' (W/M)…

scan0257 List of components and specifications for Bentley III engine units No.3 and No.4.
View original record -2- Bentley III No.3 (1.B.50). Main bearings as Units (1) and (2) Big ends thin section non flanged A.C..6. Oil jet holes in con. rods. Crankshaft Bentley balance weights, modified rear end to suit…

scan0258 Specification list for various engine components and configurations.
View original record -3- Rm/Swdl.9/JH.11.11.38. Original large valve cylinder head, which with .030 Klinger head joint gives 6.1 : 1 comp. ratio. No. 7 - 12 push rods in .4 carbon steel. EB.3466 camshaft. Delco…

scan0259 List of specifications and modifications for the B.60 Unit No.1 test bed development engine.
View original record -4- Rm/Swdl.9/JH,11.11.38. Up to date increased inertia Attwaters camwheel. Hardened crank and dynamo pinions. Hook up of induction system RCD.758 2 - 1 1/2" S.U. with auto starter carb. 'General'…

scan0260 Specifications and modifications for engine units B.60 No.2, B.III No.4, and B.II No.15.
View original record -5- B.60 No.2 Unit (later to be fitted in chassis). Crankcase front mounting and rear end modified to suit altered position of rear flange. Camshaft C/2H gear reduced .020 to minimise interference…

scan0261 Specifications for Bentley engine units II No.19, II No.20, and B.23 OHC.
View original record -6- Bentley II No.19 Unit (3.B.IV). Std. production crankcase and shaft. Die cast A.C. 6 main and big end bearings. EB.3240 - M series camshaft. Rockers with W/M bores. Increased inlet port cylinder…

scan0262 List of specifications for the Bentley III No.24 Unit 6.B.IV engine.
View original record -7- Rm/Cwd1.9/JH.11.11.38. Bentley III No.24 Unit 6.B.IV. Crankcase in L.5 alloy. Centri cast A.C. 6 main bearings. Hykro crank std. drilling. Big ends centri cast A.C.6. Cylinder block incorporating…

scan0263 Programme of test bed work for the Bentley III No.1 engine, detailing a series of performance and component tests.
View original record To Rm. from Rm/Swdl. c. Rm/CTS. 1315 γ Rm/Swdl.1/MH.15.11.38. PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.2/MH.10.9.38. NO. 30 BED. BENTLEY III NO.1. (a) Complete camshaft comparison test. On best…

scan0264 Engine testing procedures and specifications for Wraith III No.4 and B.III No.7 units.
View original record -2- WRAITH III NO.4. Following the test of the modified cored cylinder block and strengthened head to suit, issue short report. Refit coolant jet cylinder block and head. Repeat water temp. test as in…

scan0265 Continuation of engine unit test procedures for B.III No. 7 and the procedures for B.60 No. 2 Unit.
View original record -3- B.III NO. 7 - CONT'D. (a) Check valve bounce speed. (d) Run 1 hr. oil consumption and repeat, note whether any leaks from rear bearing. (e) Remove push rods and examine for "whipping". (f) Timing…

scan0266 Test procedures and modifications for engine units B.60 No.2, B.60 No.1, and Wraith III No.1.
View original record -4- B.60 NO.2 UNIT - CONT'D. (5) Previous valve lubrication has shown to be on lean side, this should be made in line with Wraith III. (6) Check valve bounce speed whilst silencer is fitted. (7) 1 hr.…

scan0267 Instructions for testing an OHC engine with sodium-filled valves in comparison with a B.60 engine.
View original record -5- Rm/Swdl.1/MH.15.11.38. NO. 2 TEST HOUSE. OHC ENGINE. Fit this unit on bed and note exhaust valve temperature with Sodium filled valves. Also try switching off in comparison with B.60 engine.…

scan0268 Status report on the configuration of Wraith III test units No.1 and No.2.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/CTS. c. Rm/FD. c. Rm/Wym. POSITION OF TESTS BEING CARRIED OUT ON WRAITH III UNITS AND OTHER R.R. UNITS. WRAITH III NO.1 (CYLINDER BORE WEAR TESTS). Obsolete type…

scan0269 Status report on various Wraith III units, detailing their components and modifications.
View original record -2- WRAITH III NO.3 (24.G.VI.) Obsolete crankcase with loose liner cyl. block. W/M main bearings. Sheepsbridge (original liners). Original type thick section keyed big ends AC.6. Obsolete large valve…

scan0270 List of specifications for various Wraith engine units, numbers 7, 8, 9, and a Wraith II unit.
View original record -3- WRAITH III NO.7 UNIT (26.G.VI.) Up-to-date crankcase. W/M main bearings as run 15,000 miles. Std. cylinder block. Std. AC.9 die cast thin section big ends. AC oil filter with modified strap. Small…

scan0271 List of components and modifications for Phantom III engine units No. 8, 12, and 14.
View original record -4- PHANTOM III NO.8 (SPARE UNIT). Obsolete crankcase. Long type liners. Obsolete 6 port cylinder head. LEC.5320 small base circle camshaft. Half Fescol and half S/ZN cloudburst tappets. PHANTOM III…

scan0272 Specification sheet for engine unit number 16 (35-EX.).
View original record -5- Rm/Swdl.3/MH.18.11.38. UNIT NO.16 (35-EX.) Std. production crankcase. Hykro crankshaft with extra hole in the journals. W/M main and big end bearings. Connecting rods with modified panel milling…

scan0273 Suggestions for future tests on a new chassis, covering gearbox, clutch, and rear axle, before going into production.
View original record COPY FOR FILES. 1315 & 1260 To Rm. 22.11.38. SUGGESTIONS FOR FUTURE TESTS FOR NEW CHASSIS, BEFORE GOING ONTO PRODUCTION. The following points are the suggestions put forward by those responsible for…

scan0274 Testing procedures for propellor shaft and suspension systems, including rig and road tests.
View original record -2- Gry. Propellor Shaft. Road) Exactly as for the rear axle. Dyno) IMW. The propellor shaft should be investigated for alignment, and road tested at maximum bottom gear torque at various loads, up to…

scan0275 Rig, road, and endurance testing procedures for vehicle components.
View original record -3- AFM. Brakes. Rig Tests. All pieces to stand double the pedal load required to lock rear wheels. The servo should stand 100 hours on dynamometer, load applied for 2-3 secs. per minute at pedal load…

scan0276 Schedule of endurance and performance tests for steering and engine components.
View original record -4- FJH. Steering. 20,000 miles in France as at present. 10,000 miles in London traffic, including deliberate parking and manoeuvring in confined spaces to exercise steering gear. 20,000 miles general…

scan0277 Endurance testing standards for cooling system components, bonnets, heaters, and demisters.
View original record -5- Std. Cooling System. Radiator. If completely new design is in question at least 6 radiators should be built and run, so that a minimum total mileage of 180,000 is covered. If new plating methods…

scan0278 Testing procedures for the cooling system, including dynamometer, road, and endurance tests.
View original record -6- Std. Cooling System General. IMW. Complete system to be tested out at either Brooklands or Montlhery. Figures to be checked in hot weather on Continental motor roads and on mountain passes. At…

scan0279 Summary of suggested future testing procedures covering coachwork, winter running, and a strategy for mileage-based development.
View original record -7- IMW. Coachwork. Scope of development should include coachwork tests covering ventilation, heating, comfort and durability, i.e. rattles, shakes, sticking windows etc. Tests of latest type ski…

scan0280 Programme of test bed work for B.III engine units No. 1 and No. 6.
View original record 1315 To Rm. from Rm/Swdl. c.c. Rm/CTS. Rm/Swdl.2/MH.24.11.38. PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.1/MH.15.11.38. NO.30 BED. B.III NO.1 UNIT. Continue with programme as per previous memo.…

scan0281 Test and modification schedule for engine units B.III NO.6, Wraith III NO.4, and B.60 NO.2.
View original record -2- B.III NO.6 UNIT - Cont'd. (f) Leaks to be cured and unit tuned up before passing off. WRAITH III NO.4. Unit now in shop is being fitted with Hoyt's metal main bearings. Low inertia type of…

scan0282 Test procedures and parameters for B.60 engine units, including endurance and clearance checks.
View original record -3- B.60 NO.2 UNIT - Cont'd. ( 4) Carry out tappet clearance tests on the inlet valves (Steel Push Rods). Cold at .005, Water at 80°C ? Water and oil 80°C ? (5) Gears should be O.K. and all other…

scan0283 Continued instructions for testing the B.60 No.1 Unit and the Wraith III No.1.
View original record -4- Rm/Swdl.2/MH.24.11.38. B.60 No.1 UNIT. - Cont'd. Any leaks or troubles to be recorded. Drop in power of more than 3 B.H.P. to be invest- igated before proceeding. Record of tappet clearances to be…

scan0284 Programme of test bed work for the B.80 No.1 unit.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/CTS. Rm/Swdl.1/MH.11.1.39. PROGRAMME OF TEST BED WORK. Further to Rm/Swdl.2/MH.24.11.38. NO.30 BED. B.80 NO.1 UNIT. Following inspection of bearings and casing of big…

scan0285 Testing and modification instructions for B.V. NO.5 and B.V. NO.1 engine units.
View original record -2- B.V. NO.5 UNIT. Has been rebuilt and later to be fitted in 10.B.V. New parts include new piston and new main bearing and cylinder head. Following running in check:- (a) Oil consumption and repeat…

scan0286 Test procedures for a Wraith III unit with vibration issues and a B.60 unit with modified pistons.
View original record -3- Rm/Swdl.1/MH.11.1.39. WRAITH III NO.9 UNIT. This unit was removed from 1.B.50 on account of bad vibration which had all symptoms of broken crank or damper. Inspection has revealed nothing definite…

scan0287 Test instructions for B.60, Wraith III, and B.II engine units, focusing on piston trials, rattle investigation, and power checks.
View original record -4- Rm/Swdl.1/MH.11.1.39. B.60 NO.1 UNIT - Cont'd. As soon as possible we want to try oil jets on underside of pistons. JNR/Mitchell is getting the information for this trial which will be carried out…

scan0288 Completing test bed experiments on a Duplex Stromberg Carburetter for the No.1 engine.
View original record 1315 Rm/CTS. Rm11/R.13.1.39. TEST BED EXPERIMENTS. We consider that the Duplex Stromberg Carburetter on the No.1 engine is one of the experiments required to be completed. Rm.

scan0289 Requesting the measurement of blow-by into the crankcase during endurance tests.
View original record 135 Rm/Swdl. from Rm. Rm5/R.16.1.39. BLOW-BY FIGURES. Whenever we run endurance we should like to make a practice of measuring the blow-by into the crankcase during these tests. Rm.

scan0290 Requesting the removal of two engines and components from a test house to Shardlow for storage.
View original record 1315. To Mr. Barkworth. c. to Hd. Rm/Swdl.17/JH.2.2.39. Please arrange for removal of two engines and components from No.2 test house to Shardlow for storage. O/N. 555. Rm/Swdl.

scan0291 Programme of test bed work for the B.80 No.1 and Bentley V No.1 engine units.
View original record 1315 To Rm. c.c. to Rm/CTS. Rm/Cwd'.3/JH.6.2.39. PROGRAMME OF TEST BED WORK. Further to memo. Rm/Cwd'.1/MH.11.1.39. No.30. Bed. B.80 No.1 Unit. (1) Continue induction system and carburetter…

scan0292 List of engine testing and development tasks for various units.
View original record -2- Rm/Wdl.3/JH.6.2.39. Raised crown Aerolite pistons 8.0 : 1 comp. ratio 1s induction system and carbs. (1) Find best valve timing for power. (2) On best power, check loss to cut out open using…

scan0293 List of tests to be conducted on an engine unit, including checks for power, exhaust, compression, and oil consumption.
View original record -3- RM/Swdl.3/JH.6.2.39. obtained from garage). After running in following tests to be taken. (1) Power open exhaust on best valve timing also power with (a) Standard Bentley exhaust system. (b)…

scan0294 Request to return two Jaeger rev counters for repair.
View original record 1204 1315 To HPS/A.Moore from Rm/Swdl. Rm/Swdl.8/MH.10.2.39. Will you please return the Jaeger rev counters to the makers for repair. The numbers are 48736 and 56980. Rm/Swdl.

scan0295 Requesting an order for 6 Tecalemit filter elements for the chassis test beds.
View original record 1315 To Roy. c. to EJJ. Rm/Cwdl.3/JH.14.2.39. Will you please order 6 Tecalemit elements for the large size of filters (^K.5630) now installed on the chassis test beds. Rm/Cwdl.

scan0296 Programme of test bed work for B 80, B V, and Wraith III engine units.
View original record To Rm. or to Rm / JMS 15/5 Rm/Swdl 22/ER 15.2.39. Programme of Test Bed Work. Further to memo - Rm/Swdl 3/JH. 6.2.39. No30 Bed. B 80 No. 1 Unit. Continue as previous programme with exception of items…

scan0297 Instructions for modifications and testing of various engine units.
View original record -2- This unit has been modified and overhauled for fitting into 3 B50 chassis, incorporates the following special features. Camshaft (Cast in Monikrome at R.R.) running direct in crank-case. Fabroil…

scan0298 Test procedures and modifications for engine units N 11 No 4 and Bentley 11 S No 19.
View original record -3- No 2 Test House. N 11 No 4 Unit. Following initial oil consumption test on the above unit, return to the shop for examination and measurement of special cylinder block together with pistons and…

scan0299 Outlining a series of comparative tests for engine components, particularly focusing on cylinder bore wear.
View original record -4- (g) If rig is available we might get a figure for forward facing intake whether any adjustment to carbs is necessary. (h) Every point in testing should be checked over to ensure 100% job before…

scan0300 Programme of test bed works for the B.80 No2 Unit.
View original record 1315 To Rm. c. to Rm/GTS. Programme of Test bed Works Further to Memo - Rm/Swdl 22/ER 15.2.39. No. 30 Bed. B.80 No2 Unit.- It has been decided to retain this unit for the test bed and not install in…

scan0301 Engine testing procedures including crankshaft oscillation, power curves, and oil consumption for B.80 units.
View original record -2- Before commencing the above at item (c), the head gasket should be examined to note that it is in good condition, as these tests are for comparison of existing cooling of exhaust valves compared…

scan0302 Engine test program detailing work on B.V. and Wraith III units, covering camshafts, crankshafts, and pistons.
View original record -3- Raised exhaust valve guide bosses. Short duration inlet camshaft. After running in tests to comprise. (a) Power curves with normal 1/2 tooth late and 1/2 tooth early timing to find best position…

scan0303 Test instructions for various B-series and Bentley S engine units.
View original record -4- No. 5 Test House. B. 60 Unit No. 3. Continue as previous programme Rm/Swdl 3/JH 6.2.39, with additional tests which Rm/Ed wishes to be tried, i.e. maximum pressure with extended combustion chamber…

scan0304 Proposing a standardized method for recording data on power curves from engine tests.
View original record 1315 Rm/Swdl. from Rm. Rm10/R.24.3.39. POWER CURVES. I think we should have a rubber stamp made to be printed on every power curve when it is plotted so that we are sure we get all the information…

scan0305 The programme of work for test beds, including instructions for various units.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/CTS. Rm/Swdl.1/MH.27.3.39. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.3/ER.6.3.39. Rm NO.30 BED. B.80 No.3. Irrespective of whether jobs in accordance with…

scan0306 Urgent test requirements for the Wraith III No.4 and B.V. No.6 engine units.
View original record -2- Wraith III No.4. Before carrying out the programme as instructed in the previous memo, the following tests are urgently required. (1) Power with existing straight through drive gearbox, i.e. no…

scan0307 Engine testing procedures for Bentley II No.4 and B.60 No.3 units, detailing oil consumption, blow-by, and power curve checks.
View original record -3- NO.2 BED. Bentley II No.4. Having completed the oil consumption curves on the tinned rings to a constant figure, take the following:- (1) Blow-by figure over power curve range. (2) Oil flow to the…

scan0308 Test procedures and special features for a B.60 No.4 Unit undergoing a 15,000-mile test.
View original record -4- Rm/Swdl.1/MH.27.3.39. B.60 No.4 Unit. New unit for 15,000 miles test includes following special features:- (1) 2.75 journal crankshaft with 3 layer Vandervell main bearings. (2) Adapted…

scan0309 Tune-up instructions for B.60 No. 4 Unit, covering leaks, carbs, idling, gears, and valve gear.
View original record -5- Rm/Swdl.1/MH.27.3.39. B.60 No. 4 Unit - Cont'd. (5) Tune up in following respects:- (a) Oil leaks, if any, to be cured. (b) Metering of carbs. to be approved by Rm/CTS. (c) Idling to be set. (d)…

scan0310 From one department to another listing engines and parts for which a completion date is requested.
View original record 13/5 To HPS. from Rm/Swdl. Rm/Swdl.7/MH.18.4.39. The following is a list of engines and parts for which we should like an idea as to the date of completion. (1) Special parts necessary for fitment to…

scan0311 List of components for a 4-cylinder long-distance forging, part number PD.405.
View original record -2- Rm/Swdl.7/MH.18.4.39. (1) 4 Cylinder long distance forgings for PD.405, including (a) Crankshaft. (b) Lengthened connecting rods. Rm/Swdl.

scan0312 Programme of test bed work for the B.80 and Wraith III units, focusing on detonation, distribution, and piston comparisons.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/CTS. Rm/Swdl.3/MH.27.4.39. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.1/MH.27.3.39. NO.30 BED. B.80 No.3 UNIT. Having established that there is more difference…

scan0313 Test procedures and conditions for Wraith III and B-series engine units in the No. 5 Test House.
View original record -2- WRAITH III No.4 UNIT - Cont'd. Also care should be taken to see that the water temp. is identical, also oil temp. and air temp. if possible. No. 5 TEST HOUSE. B.60 No.1 UNIT. The main feature on…

scan0314 Engine component testing procedures for various units.
View original record -3- B.80 No.2 UNIT. - Cont'd. Available for trial are:- (a) R.R. Harmonic damper with loose inertia rings. (b) Studebaker damper with various hardness of rubbers and friction settings. (c) Slack cam…

scan0315 Requesting the return of two Jaeger rev counters for overhaul.
View original record 1325 To HPS/AM. from Rm/Swdl. Rm/Swdl.4/MH.4.5.39. Will you please return to the makers for overhaul, the two Jaeger rev counters we hand you herewith. Nos. 57485 and 61010. Rm/Swdl.

scan0316 Programme of test bed work for various engine units including endurance and oil consumption tests.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/CTS. Rm/Swdl.3/MH.8.5.39. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.3/MH.27.4.39. No.30 BED. Rm B.80 No.3. Following inspection of cap half main bearings…

scan0317 Test procedures and checks for W.III No.9 and B.60 No.1 engine units.
View original record -2- W.III No.9 UNIT - Cont'd. Check whether any overoiling on opening up after idling. Take open exhaust power curve. Timing gears. It is important that the timing gears are quiet both in respect of…

scan0318 Instructions for modifications and testing procedures for B.60 and B.80 engine units.
View original record -3- B.60 NO.1 UNIT - Cont'd. Whilst the cylinder heads are being changed the Studebaker damper should be removed for fitting to B.80 No.3 unit. A B.60 type of harmonic damper to be fitted to B.60 No.1…

scan0319 Request to return a Negretti & Zambra thermometer to the makers for repair.
View original record 13/5? To HPS/AM. from Rm/Swdl. Rm/Swdl.6/MH.9.5.39. Will you please return to the makers to be repaired, 1 Negretti & Zambra No.T/32738 Thermometer. Rm/Swdl.

scan0320 Programme of test bed work for the Wraith Ripple No.2 Unit engine.
View original record 1815 To Rm. from Rm/Swdl. c. Rm/CTS. Rm/Swdl.5/MH.16.5.39. PROGRAMME OF TEST BED WORK. Further to our memo Rm/Swdl.3/MH.8.5.39. NO.30 BED. WRAITH RIPPLE No.2 UNIT. 3¼ BORE UNIT. (a) At present has…

scan0321 Testing and assembly specifications for Wraith Ripple No.2 and Wraith III No.4 engine units.
View original record -2- WRAITH RIPPLE NO.2 UNIT - Cont'd. (5) Take heat to oil as previously carried out on piston comparison. (6) Carburation tests to be taken as specified by Rm/CTS. (7) Unit to be tuned up in all…

scan0322 Test programme for engine units B.60, B.80, and B.II, covering cylinder heads, dampers, and oil consumption.
View original record -3- Rm/Swd1.5/MH.16.5.39. NO.5 TEST HOUSE. B.60 NO.1 UNIT. Complete cylinder head tests after combustion chamber mod. to Ex.1383 as carried out on previous head conditions to Rm/Swd1.3/MH.27.4.39.…

scan0323 Programme of test bed work for the B.80 No.4 Unit, including special features and test conditions.
View original record 1315 To Rm. c.c. to Rm/CTS. Rm/Swd18/JH.25.5.39. PROGRAMME OF TEST BED WORK. Further to memo. Rm/Swd1.5/MH.16.5.39. B.80 No.4. Unit. New unit now being assembled for test prior to being fitted in…

scan0324 Specifications and test procedures for Wraith III engine units No. 10 and No. 4.
View original record -2- Rm/Swd1.8/WH.25.5.39. (5) Unit generally to be brought up to standard for fitting in car in respect of slow running, leaks gears and valve gear. Wraith III No.10 Unit (Continental). Unit for above…

scan0325 Work program for testing and modifying various engine units.
View original record -3- Rm/Swdl.8/JH.25.5.39. Wraith III No.4 Unit. (Cont'd). memo. carry out - (1) Tests on performance distribution and metering of duplex induction system (Stromberg duplex carb). (2) Valve bounce…

scan0326 Comparison of oil consumption and 'blow by' on Hepworth and Grandage rings.
View original record -4- Rm/Swdl.8/JH.25.5.39. comparison with oil consumption and 'blow by' on Hepworth and Grandage rings. Rm/Swdl. Swdl

scan0327 Programme of test bed work for the B.80 No. 5 unit, detailing special features and subsequent tests.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/CTS. Rm/Swdl.4/MH.15.6.39. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.8/JH.25.5.39. B.80 NO.5 UNIT. New unit now being assembled for test prior to being fitted…

scan0328 Test procedures and status report for engine units B.80 No.5 and No.1.
View original record -2- B.80 NO.5 UNIT - Cont'd. (3) Oil consumption and blow by for 1 hour at 4000 r.p.m., if consumption in excess of 2 pts/hr. repeat. (Oil pressure 30-35 lbs/sq.in. at 4000 r.p.m. inlet temp. of…

scan0329 Test procedures and endurance specifications for various engine units.
View original record -3- B.80 NO.1 UNIT - Cont'd. (b) Curve with fan removed. (c) As (b) without silencer (open exhaust). (d) If down for power under condition (c), investigate reason for same. (e) Try effects of petrol…

scan0330 Engine component testing and development plans for B.60 and B.80 units.
View original record -4- B.60 NO.3 UNIT. - Cont'd. Flush top pistons repeat (a) ExS.1383 head with turbulent lip machined away ExS.1758. (b) Std. cylinder head EB.3844. (c) Modified head PD.368. (d) Modified head PD.368…

scan0331 Programme of test bed work for a complete camshaft investigation on a unit.
View original record 1315 To Rm. from Rm/Swdl. c. Rm/CTS. Rm/Swdl.8/MH.30.6.39. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.4/MH.15.6.39. NO.30 TEST HOUSE. B.80 No.1. Following analysis of power curves carried out…

scan0332 Engine testing procedures for B.80 No.1 and No.4 units, including camshaft and crankshaft modifications.
View original record -2- B.80 No.1 - Cont'd. Starting with .010, if even, further reduce tappet clearance until idling is on verge of being uneven. If uneven increase tappet clearance until even running is obtained. In…

scan0333 Testing procedures and specifications for the W.III No.4 and Wraith Ripple No.2 engine units.
View original record -3- W.III NO.4 UNIT. Continue endurance of Vandervell big end bearings in accordance with previous memo. WRAITH RIPPLE NO.2 UNIT. Unit as removed from 12.B.V. fitted with following special features…

scan0334 Test house instructions for various engine units, including crankshaft oscillation and blow-by tests.
View original record -4- Rm/Swdl.8/MH.30.6.39. NO.5 TEST HOUSE. B.60 No.3. Investigation of crankshaft and camshaft torsional oscillations. When complete revert and continue cylinder head comparisons as previously…

scan0335 Programme of test bed work for B.80 engine units, including modifications to camshafts, crankshafts, and pistons for the 'Cresta' unit.
View original record '1315 To Rm. c. to Rm/CTS. Rm/Swdl.16/JH.9.8.39. Programme of Test Bed Work. Further to memo. Rm/Swdl.8/MH.30.6.39. No.30 Bed. B.80 No.4 Unit. Continue as per above memo. until B.80 No.1 unit is ready…

scan0336 Continued test procedures and specifications for engine units B.80 No.6 and B.80 No.4.
View original record -2- Rm/Swdl.16/JH.9.8.39. B.80 No.6. Unit Cont'd. (c) Oil consumption and "blow by" for 1 hr. at 4000 r.p.m, if consumption in excess of 2.5 pts/hr. repeat (Oil press. 35 - 40 lbs/sq.in. at 100°C.…

scan0337 Progress report on engine units B.80 No.4, W.III No.4, and B.60 No.1, detailing tests and issues.
View original record -3- B.80 No.4. Unit Cont'd. Endeavour should be made to cure oil leak past wheelcase also effect of alteration to spring pinion on rattle. If successfull complete tests in accordance with memo.…

scan0338 List of modifications and test instructions for B.60 No.1 and No.3 engine units.
View original record -4- Rm/Swdl.16/JH.9.8.39. B.60 No.1 Unit (Chain Drive). Cont'd. (1) Petrol pump push rod mods. to ECD.1257 and run with AC. pump feeding carbs. (2) 3 con. rods out of W.III No.2. unit modified in…

scan0339 Programme of test bed work for various B.80 and Wraith III engine units.
View original record Page 2 1315 To Rm. from Rm/Swdl. c. Rm/Hm. Rm/Swdl.6/MH.21.8.39. PROGRAMME OF TEST BED WORK. Further to memo Rm/Swdl.16/JH.9.8.39. NO.30 BED. B.80 No.1. Complete tests on short duration camshaft…

scan0340 Continued memo on the B.60 No.3 engine, detailing modifications and tests for the head, valve springs, and camshaft.
View original record -3- B.60 No.3 - Cont'd. Latest move on the above head is letting the plugs further in the combustion chamber. New double valve springs to be checked for bounce and surge etc. This job is important and…

scan0341 Confirming the approval of an inspector for a test at the Clan Foundry.
View original record 1315 Copy to A.I.D. Belper. Ref. E.1/1. 25th August 1940. Clan Foundry. In reply to your memo., RM/TFF.2/SW. 19.8.40, it is agreed that Mr. W. Brazier may be regarded as an approved inspector for the…

scan0342 Issues with an 8-cylinder engine, test procedures, and the rationalisation of 6-cylinder engine heads.
View original record COPY. 1315 Rm/CTS. from Rm. Rm.16/ML9.9.40 1. RATIONALISED ENGINE SPECIFICATIONS. When the 8-cylinder engine was built last week, I was told that many errors were found in the L.O.P. I am relying on…

scan0343 Experimental testing log for various aircraft engines, detailing tests and their status.
View original record No. 2074. EXPERIMENTAL TESTING Date :- 19.3.41. 1315 TEST BED. | ENGINE. | TEST TAKEN ( 18. 3. 41 ) | REMARKS. 1. | Merlin XX. 10235 | Rigging prior to continuation of carburetter development tests. |…

scan0344 Requesting the dispatch of special 75 octane petrol left behind at the Test Beds.
View original record To: Swdl/LEE. from Rm/CTS. (Glasgow) Rm/CTS.1/RH.26.5.41. TEST BEDS. 13/5 We left behind a quantity of special 75 octane petrol. Can you please arrange for this to be despatched to RR. Derby,…

scan0345 Chassis test-bed programme for the Dual Induction System SCD.864.
View original record 1315 To Rm/HH. from Rm/CTS. c.c. to Rm. Rm/CTS.14/SW.18.6.41. CLAN FOUNDRY. Chassis Test-Bed. (Programme) Dual Induction System SCD.864. First results with this indicate that this will work. We shall…

scan0346 Test plan and notes regarding throttle, air valve, and cam control adjustments.
View original record Cont'd- -2- Rm/CTS.14/SW.18.6.41. to give the same "Tee" bends as B.V. A full analysis should then be taken as per the recent B.V. test; to include :- (a) Full throttle specific consumption. (b)…

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