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
Index card concerning radiator steam valves for the W.III and Silver Wraith models.29th Jun 1938Box 9 \ 3  03-page114
Removing a radiator matrix unit and instructing the refitting of a steam escape pipe.7th Jul 1938Box 9 \ 3  03-page115
Modifications to the Wraith radiator steam escape pipe and valve to prevent water loss.18th Jul 1938Box 9 \ 3  03-page116
Proposal to modify the steam escape pipe on 'A' series Wraith radiators for potential cost savings, based on a successful scheme for the 'B' series.18th Jul 1938Box 9 \ 3  03-page117
Modification of a radiator matrix unit and the fitting of new mounting blocks.20th Jul 1938Box 9 \ 3  03-page118
Requesting the production of two sets of steam valve parts for testing on Wraith experimental cars.11th Aug 1938Box 9 \ 3  03-page119
The elimination of baffles from the Wraith III radiator to achieve a time saving.12th Aug 1938Box 9 \ 3  03-page120
The modification of the Wraith radiator top tank inlet nozzle and the omission of baffle EW.1170 for cost saving.12th Aug 1938Box 9 \ 3  03-page121
Minor alterations to the ventilating scheme for the 28.G.VI car.12th Aug 1938Box 9 \ 3  03-page122
Issues and proposed alterations for the Wraith Radiator Steam Valve on 'B' series cars and onward.14th Nov 1938Box 9 \ 3  03-page123
Modifications to a chassis by removing a plug, spring, and ball.14th Nov 1938Box 9 \ 3  03-page124
Material choice and procurement of steam valve balls for the Wraith radiator.22th Nov 1938Box 9 \ 3  03-page125
Note regarding a scheme for the Wraith radiator.11th Feb 1939Box 9 \ 3  03-page126
Request to detail a set of fixed radiator shutters for the Wraith model.17th Apr 1939Box 9 \ 3  03-page127
Radiator mounting data and dimensions for the Rippletto, Bentley 6, and Cresta models.6th Sep 1940Box 9 \ 3  03-page128
Design modifications and comparisons for the Wraith servo mechanism.20th Dec 1934Box 9 \ 4  04-page01
Revision to the Wraith II Servo design, comparing its specifications with other contemporary models.27th Aug 1936Box 9 \ 4  04-page02
Cost-reduction modifications for the Wraith II Servo, including material changes and component redesigns.12th Feb 1937Box 9 \ 4  04-page03
Fault with the Wraith servo and requesting further work to be done in the shop.4th Mar 1937Box 9 \ 4  04-page04
Modifications to the Wraith III servo system, including a new rubber stop and pin adjustments.12th Mar 1937Box 9 \ 4  04-page05
Investigation into poor braking on two Wraith chassis (24/25.G.VI), detailing servo tests and identifying a fault in the linkage.27th Apr 1937Box 9 \ 4  04-page06
Critique on the strength of servo pull-off springs and a related design modification for the Wraith III.29th Jul 1937Box 9 \ 4  04-page07
Secret memo regarding the alteration of Wraith servo cams to fix brake squeaks.29th Jul 1937Box 9 \ 4  04-page08
The change of bolts for the Wraith III servo balance lever.17th Aug 1937Box 9 \ 4  04-page09
Instruction to modify bolts for the Wraith Servo Motor Balance Lever.10th Sep 1937Box 9 \ 4  04-page10
Internal memorandum requesting the fitting of specific Wraith servo cams to compensate for different linings.15th Nov 1937Box 9 \ 4  04-page11
Order of rubber servo stops for the Wraith and Phantom III models.8th Nov 1937Box 9 \ 4  04-page12
The dispatch of six Neoprene rubber buffers for the servo on the first six Wraith cars.10th Dec 1937Box 9 \ 4  04-page13
Required modifications to the Wraith servo cams.1st Mar 1938Box 9 \ 4  04-page14
Investigation into the causes and prevention of Wraith servo juddering.3rd Mar 1938Box 9 \ 4  04-page15
Technical report on the causes and potential cures for mechanical servo brake judder, including experiments with different springs and brake linings.3rd Mar 1936Box 9 \ 4  04-page16
Tests conducted on the servo's star springs to eliminate judder, with a recommendation for a new steel clip design.3rd Mar 1938Box 9 \ 4  04-page17
Requesting the production of two cast iron servo drums for Wraith & B.III models to resolve issues with steel drums.16th Mar 1938Box 9 \ 4  04-page18
Request to manufacture two graphite bronze packing ring discs for a Wraith Servo.30th May 1938Box 9 \ 4  04-page19
Alteration to servo operating levers to use a stock of 160 incorrectly produced forgings.16th Jun 1936Box 9 \ 4  04-page20
Internal memorandum regarding the sourcing and modification of servo motor star springs for the Wraith model.24th Jun 1938Box 9 \ 4  04-page21
Alteration to the rubber stop on the servo reverse link for the Wraith III chassis.3rd Jun 1938Box 9 \ 4  04-page22
The substitution of reamed fitting bolts with 3.BA. bolts on the Wraith Servo.2nd Sep 1938Box 9 \ 4  04-page23
Groaning noises from the Wraith servo and a proposed change of material to RAD13 to resolve the issue.30th Nov 1938Box 9 \ 4  04-page24
Material change from 'Halo' to RAD.13 for the Wraith Servo on the 'C' series chassis.30th Nov 1938Box 9 \ 4  04-page25
Use of RAD13 material to resolve a 'servo groan' issue on the Wraith chassis.1st Dec 1938Box 9 \ 4  04-page26
Requesting an urgent order for RAD.13 parts for the Wraith Servo due to production issues with 'Halo' material.3rd Dec 1938Box 9 \ 4  04-page27
Supply and testing of Wraith servo parts produced in RAD.13 material.3rd Dec 1938Box 9 \ 4  04-page28
The delivery and fitting of new servo friction material GW.2148 for the Wraith model to avoid squeaks.17th Dec 1938Box 9 \ 4  04-page29
B.5 with Wraith gearbox, referencing another file.22th Dec 1938Box 9 \ 4  04-page30
The delivery schedule for liners and clarification on material specifications.7th Feb 1939Box 9 \ 4  04-page31
Requesting an order for 228 sets of friction lining for the 25/30-HP chassis servo motor and mechanism.6th Feb 1939Box 9 \ 4  04-page32
Request to fit a solid servo back plate to chassis 28.G.VI.27th Mar 1939Box 9 \ 4  04-page33
Request to make one set of Wraith servo cams with 30° for experimental work with VG.90 linings.7th Jun 1939Box 9 \ 4  04-page34
Instruction to replace a cork plug on the Wraith model's Servo Drive Shaft.28th Jun 1939Box 9 \ 4  04-page35
Suspensions and rear seating positions, comparing them with competitor vehicles like Ford and Cadillac.18th Oct 1935Box 9 \ 5  05-page001
Limousine seating comfort, engine positioning, and potential chassis design improvements.16th Oct 1935Box 9 \ 5  05-page002
Promotional document for the Ford V-8, annotated for a comparison with the Rolls-Royce Wraith.1st Mar 1935Box 9 \ 5  05-page003
The development and testing of anti-roll rods for the Phantom III, Wraith II, and 25 HP models.24th Mar 1936Box 9 \ 5  05-page004
Two parts relating to the Wraith II model.11th Jun 1936Box 9 \ 5  05-page005
The calculation of road springs, stresses, and geometry for the Wraith II front suspension.23th Jun 1936Box 9 \ 5  05-page006
Ordering of rear road springs for the Wraith II model, including a blueprint and a request for plate thickness.14th Jul 1936Box 9 \ 5  05-page007
Ordering various rear road springs with different poundages for the Wraith model.17th Jul 1936Box 9 \ 5  05-page008
Design and material for an oil filler and level indicator for the Wraith II front shock damper.18th Aug 1936Box 9 \ 5  05-page009
Proposed modifications for the rear road springs on the first Wraith II car.6th Oct 1936Box 9 \ 5  05-page010
Blueprint and ordering instructions for the rear road springs of the Wraith II first chassis.22th Oct 1936Box 9 \ 5  05-page011
Requesting recommendations for the poundage of rear road springs for the first Wraith II car.23th Oct 1936Box 9 \ 5  05-page012
Suggesting the modification of existing Wraith II rear road springs to a new drawing.26th Oct 1936Box 9 \ 5  05-page013
Inability to re-set cadmium-plated rear road springs for the Wraith II.27th Oct 1936Box 9 \ 5  05-page014
On Wraith road springs, detailing the dangers of re-heat treating plated springs due to metal penetration.29th Oct 1936Box 9 \ 5  05-page015
Simplified lubricating coil pipe for the Wraith II front suspension, comparing it to the Phantom III.22th Jan 1937Box 9 \ 5  05-page016
Design considerations and clearance issues for the Wraith II front suspension lower triangle.1st Feb 1937Box 9 \ 5  05-page017
Assembly of a Wraith II Front Roll Rod and proposing a modified design based on an American version.2nd Feb 1937Box 9 \ 5  05-page018
Use and positioning of a rear anti-roll bar on a Wraith II with a Phantom III rear axle.2nd Feb 1937Box 9 \ 5  05-page019
Letter to Samuel Fox & Co. Ltd. clarifying the weight of a spring and providing a print for a centre bolt.3rd Feb 1937Box 9 \ 5  05-page020
Letter to Messrs. Thos. Firth & John Brown Ltd. regarding the return of a print.3rd Feb 1937Box 9 \ 5  05-page021
Need to redesign and lighten the upper triangle levers for the Wraith II and Phantom III independent front wheel suspension.6th Feb 1937Box 9 \ 5  05-page022
Modifications for the Wraith II Independent Front Suspension to resolve issues found on the first car.8th Feb 1937Box 9 \ 5  05-page023
Design changes and solutions for yoke piece clamping bolts, an oil pipe, and a lower bearing.8th Feb 1937Box 9 \ 5  05-page024
Modification to the Wraith II front suspension main forging fixing bolts.9th Feb 1937Box 9 \ 5  05-page025
Use of plain bearings instead of rubber bushes for the Wraith II rear road springs.20th Feb 1937Box 9 \ 5  05-page026
Preliminary schemes for a new independent front wheel suspension for the Wraith III.27th Feb 1937Box 9 \ 5  05-page027
Design changes and providing blueprints for a vehicle mock-up.4th Sep 1936Box 9 \ 5  05-page028
Modifications to the Wraith II front hub, stub axle, and pivot.4th Sep 1936Box 9 \ 5  05-page029
Request to refit rubber shackles to the road springs of car 24.G.6.10th Mar 1937Box 9 \ 5  05-page030
Wraith III Independent Front Wheel Suspension with exposed road springs and separate dampers.12th Mar 1937Box 9 \ 5  05-page031
Urgent internal memo to order 4 needle bearings from Hoffmans.15th Mar 1937Box 9 \ 5  05-page032
Confirming the handover of schemes for a mock-up of the new front suspension for the Wraith III.17th Mar 1937Box 9 \ 5  05-page033
Listing design scheme prints for the Wraith III new suspension, delivered for costing purposes.17th Mar 1937Box 9 \ 5  05-page034
Letter from English Steel Corporation regarding two coil springs for print N.Sch 5071, detailing dimensions and delivery arrangements.18th Mar 1937Box 9 \ 5  05-page035
Modified and simplified rear spring pad for the Wraith model, superseding a previous design.18th Mar 1937Box 9 \ 5  05-page036
Design and issues of the Wraith independent suspension system.22th Mar 1937Box 9 \ 5  05-page037
Buick design scheme, a Derby proposal, and the successful use of rubber bushings by Cadillac.24th Mar 1937Box 9 \ 5  05-page038
Micro-examination report on a Wraith front suspension coil spring that failed a bumper test.24th Mar 1937Box 9 \ 5  05-page039
The design schemes for the Wraith III open coil spring front suspension.31th Mar 1937Box 9 \ 5  05-page040
Secret memo confirming the handover of blueprints related to the Wraith III open spring front suspension.31th Mar 1937Box 9 \ 5  05-page041
Micro-examination report detailing cracks found on a front suspension lever after a bumper test.5th Apr 1937Box 9 \ 5  05-page042
Photomicrograph showing a cross-section of a material with a surface crack.1st Oct 1935Box 9 \ 5  05-page043
Cover sheet with two handwritten reference numbers.1st Oct 1935Box 9 \ 5  05-page044
Photomicrograph showing a crack in a material's microstructure.1st Oct 1935Box 9 \ 5  05-page045
Cover or separator page with handwritten reference numbers.8th Apr 1937Box 9 \ 5  05-page046
Secret memo detailing weight-saving modifications for the Wraith III front suspension main forging.8th Apr 1937Box 9 \ 5  05-page047
List of five design and manufacturing modifications made to a component.8th Apr 1937Box 9 \ 5  05-page048
Inadequate bending stiffness of the Wraith III front suspension front pan and proposed modifications.8th Apr 1937Box 9 \ 5  05-page049
Modifications to a lever bearing housing, radiator attachment forgings, and a stiffened pan.12th Apr 1937Box 9 \ 5  05-page050


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