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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Instructions for fitting alternative engine mountings to Wraith car 26-G-VI to test for steering column shake.7th Oct 1937Box 8 \ 7  07-page46
Modification to the engine rear suspension for the Wraith III model.26th Oct 1937Box 8 \ 7  07-page47
Requesting instructions to issue a covering order for an invoice for verbally ordered rubber blocks.29th Oct 1937Box 8 \ 7  07-page48
Request to place an official order for two rubber blocks to be used for experimental engine mountings.2nd Nov 1937Box 8 \ 7  07-page49
Modifications for Wraith car 24.G.VI in the fitting shop.10th Nov 1937Box 8 \ 7  07-page50
Letter from British Tyre & Rubber Co. Ltd. concerning a delivery delay for metal parts FW.1410 and FW.1411.10th Nov 1937Box 8 \ 7  07-page51
Rough sketch for a front high engine mounting on the Wraith III.29th Nov 1937Box 8 \ 7  07-page52
Changes to the engine mounting for the Wraith III model.30th Nov 1937Box 8 \ 7  07-page53
Design memorandum for the Wraith III high front engine mounting with an offset nose.1st Dec 1937Box 8 \ 7  07-page54
Temporary scheme for a Torque Reaction Damper for the Wraith III with high front engine mounting.9th Dec 1937Box 8 \ 7  07-page55
Wraith III rear engine mounting and a modification to a cross member.20th Dec 1937Box 8 \ 7  07-page56
The decision for a raised engine mounting on the Wraith model.12th Jan 1938Box 8 \ 7  07-page57
Modifications to the Wraith Crankcase, including the removal of front engine feet.14th Jan 1938Box 8 \ 7  07-page58
Schemes for pipes and wiring for the Wraith III model.18th Jan 1938Box 8 \ 7  07-page59
The deletion of crankcase facings for front engine supports on Wraith III and Bentley III engines.18th Jan 1938Box 8 \ 7  07-page60
Request to place an official order for four rubber blocks from British Tyre & Rubber Co. Ltd.19th Feb 1938Box 8 \ 7  07-page61
Letter confirming the prices for two different specifications of rubber blocks.26th Feb 1938Box 8 \ 7  07-page62
Contents note for four rubber blocks following verbal instructions from Mr. Whyman.2nd Mar 1938Box 8 \ 7  07-page63
Contents note for a verbal order of four rubber blocks.3rd Mar 1937Box 8 \ 7  07-page64
Request to send an official order to the British Tyre & Rubber Co. Ltd. for four rubber blocks.4th Mar 1938Box 8 \ 7  07-page65
Requesting an order for more rubber blocks and confirming others have been despatched for testing.8th Mar 1938Box 8 \ 7  07-page66
Completed design modifications for the Wraith III rear engine suspension.10th Mar 1938Box 8 \ 7  07-page67
Dimensions and required modifications for the Wraith III front engine support rubbers.16th Mar 1938Box 8 \ 7  07-page68
Requesting an official order for four rubber blocks previously ordered by telephone.20th Apr 1938Box 8 \ 7  07-page69
Improvements to the Wraith engine mounting by using more rubber to increase smoothness.25th May 1938Box 8 \ 7  07-page70
Notification regarding a blueprint for rubbers of increased thickness for the Wraith III chassis rear engine mounting.31th May 1938Box 8 \ 7  07-page71
Experimental thicker torque rubbers for the Wraith III chassis rear engine mounting.8th Jun 1938Box 8 \ 7  07-page72
Experimental modification to the Wraith III front engine mounting using more rubber.15th Jun 1938Box 8 \ 7  07-page73
Requesting the preparation of parts for a Wraith III front engine mounting modification.16th Jun 1938Box 8 \ 7  07-page74
Increase in thickness for the front engine mounting retaining plate on Wraith III and Bentley III cars.21th Jun 1938Box 8 \ 7  07-page75
The failure of mild steel exhaust pipes, requesting an examination of a sample to find a more durable material.27th Jun 1938Box 8 \ 7  07-page76
Request to send an official order to the British Tyre & Rubber Co. Ltd for stripping and re-rubbering torque rubbers.27th Jun 1938Box 8 \ 7  07-page77
Request to send an official order for two rubber blocks to The British Tyre & Rubber Co. Ltd.13th Jul 1938Box 8 \ 7  07-page78
Approving the use of tested rear engine mounting torque rubbers for the Wraith model production cars.14th Jul 1938Box 8 \ 7  07-page79
Technical memo discussing experimental low single point front engine mounting designs for the Wraith III car.25th Aug 1938Box 8 \ 7  07-page80
Request to detail and instruct the parts needed for an experiment on welded sheet metal brackets for rear torque rubbers.25th Aug 1938Box 8 \ 7  07-page81
Request to prepare parts for the Wraith III engine mounting.2nd Sep 1938Box 8 \ 7  07-page82
Proposed material changes for the front engine support brackets on the Wraith III and Bentley 111 models.3rd Nov 1938Box 8 \ 7  07-page83
Material and cost increase for Wraith III and Bentley III front engine support brackets.4th Nov 1938Box 8 \ 7  07-page84
Modifications for fitting a Wraith gear and engine rear suspension into a B.V. chassis.23th Dec 1938Box 8 \ 7  07-page85
Request to prepare one set of parts for an engine rear suspension for a Wraith Gear in a B.V. chassis.17th Jan 1939Box 8 \ 7  07-page86
Request to prepare and fit three sets of a new torque re-action scheme on Wraith cars.4th Mar 1939Box 8 \ 7  07-page87
Wraith II exhaust system and low-pressure oil pipe components.9th Jul 1936Box 8 \ 8  08-page01
The surface area required for exhaust system parts on the Wraith Chassis.9th Jan 1937Box 8 \ 8  08-page02
Request to fabricate a 'trouser piece' for an experimental Wraith exhaust system.10th Feb 1937Box 8 \ 8  08-page03
Request to fabricate a tail pipe and alter the swan neck pipe for a Wraith exhaust system.6th Mar 1937Box 8 \ 8  08-page04
Request to fabricate a baffle and a nose piece for the Wraith exhaust system.2nd Apr 1937Box 8 \ 8  08-page05
Request to fabricate and fit exhaust system components to a Wraith 24-G-VI for testing.16th Apr 1937Box 8 \ 8  08-page06
Requesting the build and fitment of a new standard silencer and tailpipe for comparative purposes.30th Apr 1937Box 8 \ 8  08-page07
Redesigned exhaust suspension for the Wraith III chassis.28th Jun 1937Box 8 \ 8  08-page08
Request to prepare and fit exhaust suspension parts for the Wraith III 10,000 miles car.29th Jun 1937Box 8 \ 8  08-page09
Request to build a nickel-plated exhaust system for a Wraith III car due to the short lifespan of the existing mild steel system.9th Jul 1937Box 8 \ 8  08-page10
Addition of a stay to the Wraith III exhaust system's forward expansion box.9th Jul 1937Box 8 \ 8  08-page11
The repair and ongoing issues with the exhaust system stays on a Wraith model.28th Jul 1937Box 8 \ 8  08-page12
Instruction memo regarding experimental alterations to the Wraith III car's exhaust system.18th Aug 1938Box 8 \ 8  08-page13
Weight reduction for the Wraith III exhaust system.7th Sep 1937Box 8 \ 8  08-page14
Specification sheet for exhaust system components, detailing their diameters and material gauges.7th Sep 1937Box 8 \ 8  08-page15
New welded construction method for Wraith III exhaust fittings.2nd Oct 1937Box 8 \ 8  08-page16
Instructions for fitting a lightened Wraith III exhaust system and preparing a similar system with nickel plating.15th Oct 1937Box 8 \ 8  08-page17
List of tracings for Wraith III Chassis exhaust fittings.16th Oct 1937Box 8 \ 8  08-page18
List of exhaust system components with an instruction for production of 6 sets.16th Oct 1937Box 8 \ 8  08-page19
Request to lag the standard exhaust system for a Wraith car, model 24-G-VI, so it can be re-fitted.3rd Nov 1937Box 8 \ 8  08-page20
Collapse of the Wraith's rubber exhaust system suspension and fitting an alternative.8th Nov 1937Box 8 \ 8  08-page21
Alternative methods of insulated supports for the Wraith III exhaust system.8th Nov 1937Box 8 \ 8  08-page22
New tail-pipe for car 24.G.Vl and a Hardy Spicer propeller shaft for car 25.O.Vl.15th Nov 1937Box 8 \ 8  08-page23
Modifications to the clamped joints for the Wraith III exhaust system.17th Nov 1937Box 8 \ 8  08-page24
Modification to holes in the chassis frame cruciform to provide clearance for exhaust pipes on the Wraith III model.29th Nov 1937Box 8 \ 8  08-page25
Fitting of 'Corrojoint' washers to the exhaust systems of Wraith experimental chassis.15th Dec 1937Box 8 \ 8  08-page26
Issues with Phantom III exhaust manifold washers and proposing the use of 'Corrojoint' washers as a solution.11th Dec 1937Box 8 \ 8  08-page27
Request to detail and instruct on parts for clamped joints for the Wraith III exhaust system.15th Dec 1937Box 8 \ 8  08-page28
List of new tracings for Wraith III Chassis exhaust fittings, to be instructed for 6 sets.29th Dec 1937Box 8 \ 8  08-page29
Updated instructions and parts for Wraith III Chassis exhaust fittings.31th Dec 1937Box 8 \ 8  08-page30
Proposed modification to the Wraith exhaust system's rear silencer.14th Feb 1938Box 8 \ 8  08-page31
Parts list regarding the deletion of sliding joints on the Wraith III chassis exhaust fittings.18th Feb 1938Box 8 \ 8  08-page32
The failure of a mild steel exhaust downtake pipe for the Wraith model, instructing a change to staybrite steel and inquiring about other suitable materials.5th Mar 1938Box 8 \ 8  08-page33
Whistling noise from the exhaust systems on Wraith cars 24.G.VI & 29.G.VI.18th Mar 1938Box 8 \ 8  08-page34
Modifications to the exhaust manifold for the Wraith III and Bentley III models.18th Mar 1938Box 8 \ 8  08-page35
Requesting the manufacture of a mild steel Wraith exhaust system for special treatment by Follsain Co.22th Mar 1938Box 8 \ 8  08-page36
Instruction to modify and fit an exhaust manifold for a Wraith III.25th Mar 1938Box 8 \ 8  08-page37
Buckling issue with the Wraith Exhaust System stay and suggesting a tubular replacement.28th Apr 1938Box 8 \ 8  08-page38
Confirming the production instruction for the Wraith exhaust manifold pipe EW.1789.3rd May 1938Box 8 \ 8  08-page39
Whistles in the Wraith exhaust system due to a shortened rear silencer.5th May 1938Box 8 \ 8  08-page40
Distorted intermediate exhaust pipe and an internal rattle in the rear silencer on a Wraith car.12th May 1938Box 8 \ 8  08-page41
Request to fit a pair of SS Jaguar exhaust silencers to a Wraith car using a temporary manifold.25th May 1938Box 8 \ 8  08-page42
Modifications to the Wraith III exhaust fittings, specifically the intermediate pipe and stays.27th May 1938Box 8 \ 8  08-page43
Analysis of Brake Horsepower (BHP) losses from the exhaust system of a Wraith III No.4 unit.18th Jun 1938Box 8 \ 8  08-page44
Table of B.HP and power loss figures for different exhaust system configurations at 3,500 R.P.M.18th Jun 1938Box 8 \ 8  08-page45
Performance table comparing Brake Horsepower (B.HP) and Loss for various exhaust system configurations at 4,000 R.P.M.22th Jun 1938Box 8 \ 8  08-page46
Letter regarding the dispatch of a 25/30 HP chassis exhaust system layout and an inquiry about the progress on a Bentley silencer.22th Jun 1938Box 8 \ 8  08-page47
Confirming a material change for the Wraith exhaust system components to staybright steel.23th Jun 1938Box 8 \ 8  08-page48
Request to repair a Wraith exhaust manifold and weld the front expansion box.23th Jun 1938Box 8 \ 8  08-page49
Letter regarding a missing 25/30 HP chassis exhaust lay-out print and the dispatch of a preliminary silencer, reference X.422, for a Bentley chassis.23th Jun 1938Box 8 \ 8  08-page50
Letter to Burgess Products Ltd. regarding a confidential print, a previously misaddressed correspondence, and a Bentley silencer.24th Jun 1938Box 8 \ 8  08-page51
Letter confirming the arrival of a silencer for a Bentley, which will be fitted and tested.27th Jun 1938Box 8 \ 8  08-page52
Letter from Burgess Products requesting engine specifications for the design of an experimental exhaust system.27th Jun 1938Box 8 \ 8  08-page53
Letter from the Experimental Department to Burgess Products Co. Ltd. detailing engine specifications.29th Jun 1938Box 8 \ 8  08-page54
Request to manufacture a tail pipe and downtake pipe for a Wraith exhaust system.11th Jul 1938Box 8 \ 8  08-page55
Required work on a Wraith car, including the exhaust, a new clutch lining, and suspension/steering adjustments.16th Jul 1938Box 8 \ 8  08-page56
Request to fabricate and fit an exhaust system for a Wraith, chassis 26.G.VI.19th Jul 1938Box 8 \ 8  08-page57
Experiments to develop a new, quieter, and more efficient exhaust system for the Wraith III car to reduce BHP loss.18th Jun 1938Box 8 \ 8  08-page58


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