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
List of cost reduction suggestions for the Wraith Clutch, including material changes and machining modifications.25th Feb 1937Box 8 \ 1  01-page35
Clearance issue with the Wraith II Clutch due to thermal expansion.1st Mar 1937Box 8 \ 1  01-page36
Modifications to the Wraith III clutch inspection cover.4th Mar 1937Box 8 \ 1  01-page37
Request to fit a 10' centre Borg & Beck clutch in place of the present 11' one for car 24.G.VI.28th Apr 1937Box 8 \ 1  01-page38
Wraith III slipper flywheel design, proposing blind holes instead of screwed caps for spring access.29th Apr 1937Box 8 \ 1  01-page39
Responding to a suggestion regarding the Wraith III Slipper Flywheel.30th Apr 1937Box 8 \ 1  01-page40
Secret memo discussing a design modification for the Wraith III slipper flywheel.3rd May 1937Box 8 \ 1  01-page41
Instruction to replace the clutch lining on a Wraith 25-G-VI with an experimental Ferodo lining.17th Jun 1937Box 8 \ 1  01-page42
Communication regarding the implementation of lower rated slipper flywheel springs for the Wraith III model.3rd Jul 1937Box 8 \ 1  01-page43
Request for an extra flywheel ring and bolts for a Wraith.6th Jul 1937Box 8 \ 1  01-page44
Request to dismantle a car for clutch examination due to it slipping badly.29th Sep 1937Box 8 \ 1  01-page45
Instruction memo to test clutch spring poundage and fit a new standard Borg and Beck driven clutch plate.30th Sep 1937Box 8 \ 1  01-page46
Instruction to fit a new clutch to Wraith III Unit No.2 due to wear from being run at critical speeds on the test bed.5th Nov 1937Box 8 \ 1  01-page47
The clutch assemblies for the Wraith III and Bentley III models.11th Nov 1937Box 8 \ 1  01-page48
Request to fit an 11' Thermoid faced clutch plate and to test the poundage of thrust springs.18th Nov 1937Box 8 \ 1  01-page49
Instruction to replace a 'Rabestos' faced clutch plate with a 10' 'Thermoid' faced one.12th Jan 1938Box 8 \ 1  01-page50
Sending Wraith car 24.G.VI to the fitting shop to have an inertia ring fitted to the flywheel.7th Feb 1938Box 8 \ 1  01-page51
Order for rubber tubing for a Wraith clutch pedal stop, part number 52404.11th Feb 1938Box 8 \ 1  01-page52
Request to prepare a set of parts for a Semi Flexible Flywheel Wraith.1st Mar 1938Box 8 \ 1  01-page53
Instructions for preparing a sheet brass ring and mounting a clutch on a flywheel for testing flutter.11th Mar 1938Box 8 \ 1  01-page54
Wraith car (28.G.VI) being sent for clutch examination after a third failure.21th Mar 1938Box 8 \ 1  01-page55
Comparison of inertia values in lbs.ins. for various flywheel and clutch configurations.22th Apr 1938Box 8 \ 1  01-page56
Instruction to machine the inertia ring on a Wraith flexible flywheel for easier crankcase assembly.3rd May 1938Box 8 \ 1  01-page57
Requesting the preparation of a modified flexible flywheel for a Wraith or Bentley.3rd Jun 1938Box 8 \ 1  01-page58
Request to release the flywheel and clutch section for the Wraith 'B' Series to be the same as the 'A' series.4th Jul 1938Box 8 \ 1  01-page59
Request for a copy of notes on the Wraith clutch operation concerning experimental parts fitted to production cars.3rd Aug 1938Box 8 \ 1  01-page60
Modification instruction for the Wraith clutch operation to increase clearance on the first 24 cars.3rd Aug 1938Box 8 \ 1  01-page61
Technical note regarding the clutch operating lever for the 25/30 HP 'A' series chassis, 1 to 24.12th Sep 1938Box 8 \ 1  01-page62
Deflection test procedure for flexible flywheels RM.498 and RM.533 for Wraith and Bentley models.12th Aug 1938Box 8 \ 1  01-page63
Request to dismantle a clutch, fit a new centre plate, and standardize the crankcase oil breather pipe due to a jaggering issue.30th Aug 1938Box 8 \ 1  01-page64
Instructions for preparing a flexible flywheel for chassis unit W.III.8 25.G.VI.11th Oct 1938Box 8 \ 1  01-page65
Instruction to fit a new 11' clutch plate with Ferodo S.77/2 facings to Unit W.III & Chassis 25.G.VI.14th Oct 1938Box 8 \ 1  01-page66
Instructions for conducting flywheel flutter tests on a Wraith engine.28th Oct 1938Box 8 \ 1  01-page67
Request to make and fit an additional brass ring to a car's clutch for flywheel flutter tests.3rd Nov 1938Box 8 \ 1  01-page68
Modifications to the clutch for fitting a B.60 engine unit into a Wraith chassis.25th May 1953Box 8 \ 1  01-page69
Request to fit a new 11' Thermoid faced clutch plate to Chassis 24.O.VI.22th Nov 1938Box 8 \ 1  01-page70
Clutch finger setting procedure for Wraith and Bentley models.24th Jan 1939Box 8 \ 1  01-page71
Letter from Elliott Brothers detailing the repair of Speedometer No. 11023.1st Jul 1914Box 8 \ 2  02-page01
Repair and charges for speedometer number 11023.4th Jul 1913Box 8 \ 2  02-page02
Broken Elliott speedometer from Experimental Car 2100.E and its return to the factory stores.22th Aug 1913Box 8 \ 2  02-page03
Broken Elliott speedometer returned from Vienna, and a query to establish its departmental ownership.27th Aug 1913Box 8 \ 2  02-page04
Specification for an Elliott-type speedometer driven by a raw hide belt.18th Aug 1916Box 8 \ 2  02-page05
Letter from Elliott Brothers to Rolls-Royce requesting the required length of a flexible drive for a revolution counter on a plane.24th Oct 1917Box 8 \ 2  02-page06
Selection and design specifications for a speedometer and its drive mechanism.1st May 1919Box 8 \ 2  02-page07
Instructions on the positioning of the speedometer and its cable.1st May 1919Box 8 \ 2  02-page08
Hand-drawn schematic of a speedometer drive mechanism.9th Jan 1922Box 8 \ 2  02-page09
Conference with a representative from Messrs. Elliott about a chassis speedometer.7th May 1919Box 8 \ 2  02-page10
The provision of a standard Elliott Speedometer Drive for chassis testing.20th May 1919Box 8 \ 2  02-page11
Procurement of a specific clock from Messrs Elliott Brothers for the instrument board, to match the existing speedometer.23th Jun 1919Box 8 \ 2  02-page12
Request for a longer speedometer flexible drive and a follow-up on an ordered clock for chassis 1.E.X.23th Jun 1919Box 8 \ 2  02-page13
The incorrect length of the flexible drive for the speedometer on a 40/50HP chassis.23th Jun 1919Box 8 \ 2  02-page14
Finish of a clock speedometer supplied by Messrs. Elliott's and suggesting the same finish for the clock dial.28th Jul 1919Box 8 \ 2  02-page15
Requesting the return of a faulty speedometer to its manufacturer, Messrs. Elliott, for correction.23th Sep 1919Box 8 \ 2  02-page16
Three schemes submitted for a speedometer driving pulley.25th Sep 1919Box 8 \ 2  02-page17
Correspondence regarding a mix-up with a speedometer received from the supplier Elliott Bros.27th Oct 1919Box 8 \ 2  02-page18
Letter from Elliott Brothers regarding the testing of a returned speedometer which was reading high.22th Oct 1919Box 8 \ 2  02-page19
Clarifying the need for an expanding pulley instead of a split pulley from supplier Messrs. Elliott Bros.11th Dec 1919Box 8 \ 2  02-page20
Letter clarifying an order for speedometer parts with Messrs. Elliott Bros.19th Dec 1919Box 8 \ 2  02-page21
The correct Elliott speedometer types for the chassis.30th Jan 1920Box 8 \ 2  02-page22
Letter to Messrs. Elliott Bros. (London) Ltd. complaining about the unexpected delivery of a watch to Derby.16th Dec 1920Box 8 \ 2  02-page23
Urgent request for an Elliott Speedometer for a 'Goshawk' car with specific drive, gear ratio, and wheel size requirements.31th Dec 1920Box 8 \ 2  02-page24
Requesting an order to be issued for the repair of an Elliott Speedometer, No. 28800.21th Jan 1921Box 8 \ 2  02-page25
Requesting an order for an Elliott Speedometer for the 'Goshawk I'.16th Feb 1921Box 8 \ 2  02-page26
Poor performance of Elliott speedometers and considering Waltham speedometers as a replacement.15th Jul 1921Box 8 \ 2  02-page27
Comparing the Waltham and Elliott speedometers, discussing reliability, operation, and readability.18th Jul 1921Box 8 \ 2  02-page28
Comparing the reliability and cost of Elliott, Waltham, Watford, and Smith speedometers.12th Sep 1921Box 8 \ 2  02-page29
Sending a speedometer for urgent repair for the Hawk Northcliffe experimental car No. 3.11th Nov 1922Box 8 \ 2  02-page30
Letter to Elliott Bros. regarding the urgent repair of a speedometer from experimental car No.3.6th Nov 1922Box 8 \ 2  02-page31
Speedometer correction test results for the Hawk Northcliffe car's Elliott speedometer.23th Nov 1922Box 8 \ 2  02-page32
The despatch of a speedometer for repair to Messrs. Elliott Bros.18th Dec 1922Box 8 \ 2  02-page33
Tests to determine whether an Elliott speedometer shows any lag in following up speed during acceleration.15th Jan 1923Box 8 \ 2  02-page34
Page detailing two methods for calculating acceleration, one based on time and the other using a speedometer.15th Jan 1923Box 8 \ 2  02-page35
Test report on speedometer lag during acceleration at different speeds.27th Jan 1923Box 8 \ 2  02-page36
Speedometer test results for a 49-GB car, comparing indicated versus actual speeds.27th Jan 1923Box 8 \ 2  02-page37
Speedometer readings for the 3-EX car, comparing indicated versus actual speeds.1st Feb 1923Box 8 \ 2  02-page38
Sending an Elliott Speedometer to the makers for repair.1st Feb 1923Box 8 \ 2  02-page39
Test report on the accuracy of an Elliott speedometer on car 6.EX.1st Feb 1923Box 8 \ 2  02-page40
Instruction sheet regarding a faulty Elliott speedometer that has failed twice.30th Apr 1923Box 8 \ 2  02-page41
Calibration results for an Elliott Speedometer, number 30066, from tests conducted on two separate dates.14th May 1923Box 8 \ 2  02-page42
Test report on the 3.EX (HAWK) Speedometer and Mileometer performance with varying tyre pressures.1st Jun 1923Box 8 \ 2  02-page43
The receipt of two sets of new Elliott 'M' type speedometers for testing on the 40/50 HP and 20 HP car models.26th Feb 1924Box 8 \ 2  02-page44
List of parts and particulars for Elliott Speedometers.26th Feb 1924Box 8 \ 2  02-page45
Change of speedometers for the 40/50 HP chassis.4th Jun 1924Box 8 \ 2  02-page46
Speedometer types, reduction gear issues, and proposed solutions for the 40/50 HP chassis.5th Jun 1924Box 8 \ 2  02-page47
Letter regarding the inspection of 40/50 HP speedometers supplied by Elliotts.6th Jun 1924Box 8 \ 2  02-page48
Letter regarding Elliotts 40/50 speedometers, discussing instruments for testing and the length of the flexible drive.26th Jun 1924Box 8 \ 2  02-page49
Two Elliott Speedometers sent for testing on 40/50 Chassis.8th Aug 1924Box 8 \ 2  02-page50
Testing and reliability of an Elliott speedometer compared to an A.T. model.10th Mar 1925Box 8 \ 2  02-page51
Faults found with an Elliott speedometer and comparing it to an A.T. principle model.11th Mar 1925Box 8 \ 2  02-page52
Return of Elliott speedometers and considering testing Smith Company speedometers as an alternative.12th Mar 1925Box 8 \ 2  02-page53
Follow-up communication regarding the return of Elliott Speedometers.2nd Apr 1925Box 8 \ 2  02-page54
Returning two Elliott speedometers that were loaned for testing.6th Apr 1925Box 8 \ 2  02-page55
Return of unsatisfactory Elliott speedometers.22th Apr 1925Box 8 \ 2  02-page56
Progress of speedometers sent by Messrs. Elliott Bros.27th Apr 1925Box 8 \ 2  02-page57
Chasing a reply to a previous communication regarding Elliott Speedometers.1st May 1925Box 8 \ 2  02-page58
Following up on the progress of four speedometers sent in by Messrs. Elliott Bros.27th Apr 1925Box 8 \ 2  02-page59
Alternative Wraith connecting rod design and manufacturing process.16th Mar 1935Box 8 \ 3  03-page01
Letter to The Hughes-Johnson Stampings Ltd. arranging a meeting to discuss forged connecting rods.2nd Feb 1937Box 8 \ 3  03-page02
Letter to The Hughes-Johnson Stampings Ltd. arranging a meeting to discuss forged finished connecting rods.9th Feb 1937Box 8 \ 3  03-page03
Letter from The Hughes-Johnson Stampings Ltd arranging an interview to discuss Connecting Rods.10th Feb 1937Box 8 \ 3  03-page04


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