Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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DescriptionDateIdentifier
The dispatch of two 11' clutch plates for a 25/30 HP vehicle.1st Nov 1937Box 103 \ 1  scan0246
Instruction to fit a Thermoid faced driven plate to a car's clutch and test the springs.5th Nov 1937Box 103 \ 1  scan0247
Clutch spring issues on the 4¼ Litre Bentley & 25/30 models, proposing a test rig to check spring poundage.8th Nov 1937Box 103 \ 1  scan0248
Requesting an order for more 20/25 and 3 ½ litre clutch springs due to depleted stock.19th Nov 1937Box 103 \ 1  scan0249
Standardization of 11 inch Thermoid clutch driven plates for the 25/30 HP model.6th Dec 1937Box 103 \ 1  scan0250
Standardisation of Thermoid clutch facings for the 25/30 HP model, replacing Rabestos facings.6th Dec 1937Box 103 \ 1  scan0251
Proposing to alter existing stock of clutch plates from Rabestos to Thermoid facings for the 25/30 HP model.6th Dec 1937Box 103 \ 1  scan0252
The standardisation and conversion of 25/30 clutch driven plates to Thermoid.8th Dec 1937Box 103 \ 1  scan0253
Confirming the decision to replace 25/30 HP clutch plates from Rabestos to Thermoid.7th Dec 1937Box 103 \ 1  scan0254
Instructions for a '1000 slip' test on a 20/25 & 3 1/2 litre clutch.8th Dec 1937Box 103 \ 1  scan0255
Agreement to return unused 25/30 HP chassis clutch plates to Borg & Beck for facing replacement with Thermoid.6th Dec 1927Box 103 \ 1  scan0256
Stock and use of bronze type friction facing for 25/30 HP clutches.22th Dec 1937Box 103 \ 1  scan0257
New part number for Graphite Bronze clutch facings for the 20/25 HP & 3½-Litre models.22th Jan 1938Box 103 \ 1  scan0258
Extent of wear or slack found in a clutch bush for the 20/25 HP and Bentley models.25th Feb 1938Box 103 \ 1  scan0259
Supply, demand, and future ordering of Graphite Bronze Clutch Facings for the 20/25 HP model.12th Aug 1938Box 103 \ 1  scan0260
Recommending to increase an order for 1,000 facings from Vandervells due to a lack of local production.12th Aug 1938Box 103 \ 1  scan0261
Questioning the drilling angle of oil drain holes in 25/30 & Bentley flywheels to assess potential savings.29th Aug 1938Box 103 \ 1  scan0262
Requesting the fabrication of clutch segments and a packing ring from sintered graphite bronze for a 20/25 HP model.2nd Sep 1938Box 103 \ 1  scan0263
Testing new 'Sintered Bronze' clutch facings on a car.14th Oct 1938Box 103 \ 1  scan0264
Test report on the performance of a Graphite Bronze clutch after 10.5 months of use.15th Aug 1938Box 103 \ 1  scan0265
Test report comparing the performance of Graphite Bronze, Sintered Bronze, and Ferodo clutch facings.1st Dec 1938Box 103 \ 1  scan0266
Table showing cylinder wear particulars for July 1939, measured in thousandths of an inch.2nd Aug 1939Box 103 \ 2  scan0001
Ledger sheet detailing measurements for various vehicle chassis.1st Jul 1939Box 103 \ 2  scan0002
Measurement log sheet for various chassis, including remarks.31th Jul 1939Box 103 \ 2  scan0003
List of Bentley chassis fitted with replacement cylinder blocks during July 1939.4th Aug 1939Box 103 \ 2  scan0004
Directive regarding the specifications for replacement piston rings on Bentley and Phantom III models.7th Jul 1939Box 103 \ 2  scan0005
Specification sheet for piston ring part numbers for 3½ & 4¼ Litre Bentley and Phantom III models.11th Jul 1939Box 103 \ 2  scan0006
Oil consumption for chassis B.200.LS following an engine clean and fitting of new piston rings.11th Jul 1939Box 103 \ 2  scan0007
List of Bentley chassis fitted with replacement cylinder blocks during June 1939.10th Jul 1939Box 103 \ 2  scan0008
Cylinder wear measurements for various chassis during June 1939.10th Jul 1939Box 103 \ 2  scan0009
Tabular log of component measurements for various chassis, with corresponding remarks.1st Jun 1939Box 103 \ 2  scan0010
Log sheet recording chassis inspection measurements and remarks from June 1939.1st Jun 1939Box 103 \ 2  scan0011
Cylinder wear measurements for various chassis during May 1939.5th Jun 1939Box 103 \ 2  scan0012
Log sheet of engine cylinder bore measurements for various chassis.31th May 1939Box 103 \ 2  scan0013
List of Bentley chassis fitted with replacement cylinder blocks during May 1939.7th Jun 1939Box 103 \ 2  scan0014
Wear measurements in engine bores and pistons for a specific chassis.3rd May 1939Box 103 \ 2  scan0015
The wear measurements in the bores and pistons for a Ford V8 chassis.3rd May 1939Box 103 \ 2  scan0016
Wear measurements for the bores and pistons of a Chevrolet vehicle.13th Apr 1939Box 103 \ 2  scan0017
The wear measurements of engine bores and pistons for a Chevrolet (GA) chassis.3rd Apr 1939Box 103 \ 2  scan0018
Wear in engine bores and pistons for a Chevrolet vehicle.1st Apr 1939Box 103 \ 2  scan0019
Wear measurements for engine bores and pistons on a Pontiac chassis.30th Mar 1939Box 103 \ 2  scan0020
Wear in bores and pistons for a Chevrolet 30 chassis.30th Mar 1939Box 103 \ 2  scan0021
List of Bentley chassis fitted with replacement cylinder blocks during April 1939.5th May 1939Box 103 \ 2  scan0022
Table detailing cylinder wear measurements (nominal and oval) for various chassis during April 1939.4th May 1939Box 103 \ 2  scan0023
Log sheet from April 1939 detailing numerical measurements for various car chassis.28th Apr 1939Box 103 \ 2  scan0024
List of Bentley chassis fitted with replacement cylinder blocks during March 1939.5th Apr 1939Box 103 \ 2  scan0025
Cylinder wear measurements for various chassis during March 1939.4th Apr 1939Box 103 \ 2  scan0026
Tabular log of chassis measurements and remarks from March 1939.31th Mar 1939Box 103 \ 2  scan0027
The history and specifications of chilled cylinder bores for Bentley production.14th Feb 1939Box 103 \ 2  scan0028
Cylinder iron specifications, identifying the last chassis produced with chilled bores.27th May 1938Box 103 \ 2  scan0029
Summary of work and average wear figures for cylinder bores on various engine models.11th Mar 1939Box 103 \ 2  scan0030
History and properties of chilled cylinder bores in Bentley engines and advocating for better record-keeping.11th Mar 1939Box 103 \ 2  scan0031
Experimental cylinder liner materials and their resistance to corrosive and frictional wear.11th Mar 1939Box 103 \ 2  scan0032
Engine bore wear, corrosion testing methods, and the use of centrifugally cast cylinder inserts.11th Mar 1939Box 103 \ 2  scan0033
Engine bore chrome plating experiments and a comparison of split skirt versus solid skirt pistons.11th Mar 1939Box 103 \ 2  scan0034
Continued report on pistons, comparing Aerolite and standard types, and discussing bore wear testing.11th Mar 1939Box 103 \ 2  scan0035
Test bed procedures and results for accelerating cylinder block bore wear.11th Mar 1939Box 103 \ 2  scan0036
Engine component wear test report detailing procedures and results for various tests.11th Mar 1939Box 103 \ 2  scan0037
Engine liner wear results from a series of three different tests.11th Mar 1939Box 103 \ 2  scan0038
Technical discussion on engine bore wear tests and the function of piston rings.11th Mar 1939Box 103 \ 2  scan0039
Piston ring types and a proposed experimental testing programme.11th Mar 1939Box 103 \ 2  scan0040
Cylinder wear measurements for various chassis during February 1939.6th Mar 1939Box 103 \ 2  scan0041
Data log sheet of measurements for various chassis, with entries dated throughout February and March 1939.1st Mar 1939Box 103 \ 2  scan0042
Summary of petrol pump complaints for 3.5 & 4.25 litre Bentley models, recorded during February 1939.6th Mar 1939Box 103 \ 2  scan0043
List of Bentley chassis fitted with replacement cylinder blocks during February 1939.6th Mar 1939Box 103 \ 2  scan0044
List of S.U. Petrol Pumps removed from Bentley chassis during February 1939, detailing complaints.6th Mar 1939Box 103 \ 2  scan0045
Vehicle owner, mileage, and cylinder block replacement.22th Feb 1935Box 103 \ 2  scan0046
The fitting of a special cylinder block and the wear measurements of the old one.24th Feb 1938Box 103 \ 2  scan0047
Sketch showing cross-sections for drilling holes in the intermediate journals of a Bentley crankshaft.24th Feb 1939Box 103 \ 2  scan0048
Cylinder wear measurements taken during January 1939, showing amounts plus nominal and oval in thousandths of an inch.3rd Feb 1939Box 103 \ 2  scan0049
Tabular log of chassis measurements and remarks from January 1939.31th Jan 1939Box 103 \ 2  scan0050
Cylinder bore wear on Bentley pistons.2nd Feb 1939Box 103 \ 2  scan0051
Cylinder block wear measurements for various chassis, listed in order of mileage.26th Jan 1939Box 103 \ 2  scan0052
The fitting of a special cylinder block and measurements of the old block.15th Feb 1939Box 103 \ 2  scan0053
Special features and modifications fitted to owner's cars.24th Jan 1939Box 103 \ 2  scan0054
Dispatch of four special Nickel-chrome-molybdenum cylinder blocks for wear testing.23th Jan 1939Box 103 \ 2  scan0055
List of Bentley chassis fitted with replacement cylinder blocks during December 1938.4th Jan 1939Box 103 \ 2  scan0056
Table of cylinder wear particulars for December 1938, showing nominal and oval amounts in thousandths of an inch.4th Jan 1939Box 103 \ 2  scan0057
Log sheet detailing measurements and remarks for various chassis, identified by number and manufacturing details.31th Dec 1938Box 103 \ 2  scan0058
Tabular record of chassis component measurements and remarks.31th Dec 1938Box 103 \ 2  scan0059
Requesting clarification on whether recent engine re-bores on two vehicles were the first.8th Dec 1938Box 103 \ 2  scan0060
Table detailing cylinder wear measurements taken during November 1938, showing amounts plus nominal and oval in thousandths of an inch.1st Dec 1938Box 103 \ 2  scan0061
Tabulated log sheet of engine cylinder measurements and remarks for various chassis.1st Nov 1938Box 103 \ 2  scan0062
List of Bentley chassis fitted with replacement cylinder blocks during November 1938.5th Dec 1938Box 103 \ 2  scan0063
Trial of Brico hard cylinder inserts for Bentley and Wraith engines to eliminate wear.13th Oct 1938Box 103 \ 2  scan0064
Brico cylinder inserts, their benefits, and material specifications.11th Oct 1938Box 103 \ 2  scan0065
Cylinder liner tests and observations on piston and bore wear, including a proposal from the British Piston Ring Co.11th Oct 1938Box 103 \ 2  scan0066
Bentley cylinder block with premature excessive bore wear after 12,000 miles.5th Aug 1938Box 103 \ 2  scan0067
List of Bentley chassis fitted with replacement cylinder blocks during October 1938.2nd Nov 1938Box 103 \ 2  scan0068
Table detailing cylinder wear measurements for various chassis during October 1938.2nd Nov 1938Box 103 \ 2  scan0069
Log sheet of measurements for specific vehicle chassis, with remarks and details on bore diameters and oil supply.1st Oct 1938Box 103 \ 2  scan0070
Cylinder bore wear figures for 3 1/2 and 4 1/4 litre Bentley cars.25th Oct 1938Box 103 \ 2  scan0071
List of Bentley chassis fitted with replacement cylinder blocks during September 1939.6th Oct 1939Box 103 \ 2  scan0072
Table of cylinder wear measurements for various chassis during September 1938.30th Sep 1938Box 103 \ 2  scan0073
Log sheet from September 1938 recording various measurements against chassis numbers.30th Sep 1938Box 103 \ 2  scan0074
Letter requesting a comparison of cylinder bore wear figures between 4¼ and 3½ litre Bentley engines.10th Oct 1938Box 103 \ 2  scan0075
Internal memorandum concerning cylinder bore wear, the use of Arctic Oil, and handling a specific customer complaint.3rd Oct 1938Box 103 \ 2  scan0076
Log sheet detailing service records for various Bentley chassis, including oil type, mileage, and owner information.20th Sep 1938Box 103 \ 2  scan0077
Cylinder wear on chassis B.103.GP, noting a recent rebore and suggesting a trial of 'Arctic' oil.22th Sep 1938Box 103 \ 2  scan0078
Cover note for an enclosed chart regarding Bentley cylinder bore wear.20th Sep 1938Box 103 \ 2  scan0079


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