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
Steering system tests, focusing on spring control, high-speed wobbles, and pivot lean adjustments for various car models.2nd Nov 1926West Wittering \ P \ October1926-November1926  Scan113
Continued note on page 3 discussing the emphasis of road shocks.11th Nov 1926West Wittering \ P \ October1926-November1926  Scan114
Torque-speed characteristics and stalling conditions of tested EAC motors for a sequence starter.11th Nov 1926West Wittering \ P \ October1926-November1926  Scan115
Explosions in the silencer and comparing governor throttle control with positive hand control.15th Nov 1926West Wittering \ P \ October1926-November1926  Scan116
Troubleshooting explosions in the silencer caused by misadjusted throttle and governor controls.7th Oct 1926West Wittering \ P \ October1926-November1926  Scan117
Analysis of engine explosions under small throttle conditions, comparing the Phantom and Silver Ghost models.7th Oct 1926West Wittering \ P \ October1926-November1926  Scan118
Continuation of a report comparing performance to the Phantom and mentioning a future report on a roller bearing throttle.15th Nov 1926West Wittering \ P \ October1926-November1926  Scan119
Progress and delays on chassis X7770, with a completion estimate.15th Nov 1926West Wittering \ P \ October1926-November1926  Scan120
With a blueprint sketch of a combustion chamber from a Lorraine car.15th Nov 1926West Wittering \ P \ October1926-November1926  Scan121
Unfused wiring connection for illuminated instruments and proposing a safer alternative.16th Nov 1926West Wittering \ P \ October1926-November1926  Scan122
Cover memo for a list of complaints regarding the Phantom and 20 HP cars over a three-month period.16th Nov 1926West Wittering \ P \ October1926-November1926  Scan123
Quarterly complaints report for the 40/50HP Phantom model, listing the 12 worst issues for the quarter ending Sept 30th.29th Oct 1926West Wittering \ P \ October1926-November1926  Scan124
Quarterly report listing the 12 worst complaints for the 20 HP car model for the quarter ending Sept. 30th.28th Oct 1926West Wittering \ P \ October1926-November1926  Scan125
Complaints for the 20 HP model, comparing issues between pre-India and India series cars.16th Nov 1926West Wittering \ P \ October1926-November1926  Scan126
The results of fitting a Phantom throttle with roller bearings to reduce governor control lag.16th Nov 1926West Wittering \ P \ October1926-November1926  Scan127
Steering problems on early Phantom cars and proposing a remedy.16th Nov 1926West Wittering \ P \ October1926-November1926  Scan128
Summary of ongoing customer complaints regarding exhaust, throttle, and springing issues on various car models.19th Nov 1926West Wittering \ P \ October1926-November1926  Scan129
Performance curves and the lower efficiency of a sequence starter motor compared to a 6' motor.19th Nov 1926West Wittering \ P \ October1926-November1926  Scan130
The controllability and lag of the Phantom throttle governor, comparing different bearing setups and the Silver Ghost model.19th Nov 1926West Wittering \ P \ October1926-November1926  Scan131
The advantages of fitting ball and roller bearings to the governor shaft and throttle to improve performance.19th Nov 1926West Wittering \ P \ October1926-November1926  Scan132
Recommendations for rectifying complaints and implementing improvements related to throttle and governor shaft components.19th Nov 1926West Wittering \ P \ October1926-November1926  Scan133
Graph showing governor lag for chassis 8EX, plotting engine RPM against throttle notches.19th Nov 1926West Wittering \ P \ October1926-November1926  Scan135
Graph plotting engine RPM against quadrant notches to compare governor lag between a roller bearing throttle and a standard governor on chassis 8 EX.19th Nov 1926West Wittering \ P \ October1926-November1926  Scan136
Graph showing governor lag on chassis 8EX, comparing a standard carburetter with one using ball bearings in the governor.23th Nov 1926West Wittering \ P \ October1926-November1926  Scan137
Analysis of a steering 'taking charge' issue on the 40/50 HP model, particularly under braking conditions.23th Nov 1926West Wittering \ P \ October1926-November1926  Scan139
Analysis of front wheel locking under braking and steering heaviness, with a proposed solution to modify the braking distribution.23th Nov 1926West Wittering \ P \ October1926-November1926  Scan140
Proposed modifications to front braking systems and steering tubes for both open and closed cars.23th Nov 1926West Wittering \ P \ October1926-November1926  Scan141
Solutions for squeaking brakes on the 40/50 HP model, including rigid drums and flexible shoes.23th Nov 1926West Wittering \ P \ October1926-November1926  Scan142
Proposal to fit a rear spare wheel carrier to the 7-EX car for Le Canadel.26th Nov 1926West Wittering \ P \ October1926-November1926  Scan143
Calculations and proposed alterations for a new sequence starter motor.27th Nov 1926West Wittering \ P \ October1926-November1926  Scan144
Motor design alterations, efficiency calculations regarding teaser windings, and experiments on the Phantom starter motor.27th Nov 1926West Wittering \ P \ October1926-November1926  Scan145
Investigation into a chattering and vibrating oil relief valve on a 20 HP engine.30th Nov 1926West Wittering \ P \ October1926-November1926  Scan146
Test report on modifying a 20 HP pump's low-pressure oil system to reduce chattering by moving the relief valve.30th Nov 1926West Wittering \ P \ October1926-November1926  Scan147
Proposing a visit to 'WW' on Wednesday the 6th.6th Jul 1927West Wittering \ Q \ 2-July1927-September1927  1
10,000-mile bench tests for battery ignition contact points, examining condenser values and current reversal.7th May 1927West Wittering \ Q \ 2-July1927-September1927  2
Technical report detailing experiments on ignition system components.1st Jul 1927West Wittering \ Q \ 2-July1927-September1927  3
Experiments with domed platinum and tungsten screw points for ignition systems.5th Jul 1927West Wittering \ Q \ 2-July1927-September1927  4
Technical analysis of electrical point bedding, contact issues, and suggestions for improvement.5th Jul 1927West Wittering \ Q \ 2-July1927-September1927  5
Suggestion about using extra platinum on a screw point, with five samples sent for Mr. Royce's inspection.5th Jul 1927West Wittering \ Q \ 2-July1927-September1927  6
The design and fitting of a 1-G-1 type spring drive damper to a G.11 engine.5th Jul 1927West Wittering \ Q \ 2-July1927-September1927  7
Report page comparing inertia and performance data for different spring drive configurations and discussing test results.6th Sep 1927West Wittering \ Q \ 2-July1927-September1927  8
Analysis of engine performance regarding critical speed and crankshaft safety, comparing a G.1. type damper to standard slipper wheels.9th Sep 1927West Wittering \ Q \ 2-July1927-September1927  9
Laboratory tests of the No.1 scheme sequence starter, comparing different spiral angles for the pinion.8th Jul 1927West Wittering \ Q \ 2-July1927-September1927  10
Analysis of an actuator box and pinion engagement procedure with the crankshaft, detailing observations under different conditions.8th Jul 1927West Wittering \ Q \ 2-July1927-September1927  11
Report page detailing tests on a pinion and crankshaft engagement mechanism using a teazer circuit.8th Jul 1927West Wittering \ Q \ 2-July1927-September1927  12
Testing 5° and 20° spirals for pinion engagement, proposing a modification for chassis 9-EX.8th Jul 1927West Wittering \ Q \ 2-July1927-September1927  13
Test report on the twist of the axle control system under varying loads, including a deflection vs load graph.9th Jul 1927West Wittering \ Q \ 2-July1927-September1927  14
Outlining the order of precedence for experimental tests on battery ignition contact points.14th Jul 1927West Wittering \ Q \ 2-July1927-September1927  15
Component noise comparisons, testing progress, and delays with experimental electrical parts.8th Jul 1927West Wittering \ Q \ 2-July1927-September1927  16
Test report on the latest pattern of American-fitted Lovejoy delay-action shock absorbers.8th Jul 1927West Wittering \ Q \ 2-July1927-September1927  17
Summary of opinions on Lovejoy dampers versus RR hydraulic shock absorbers, discussing ride quality and control.8th Jul 1927West Wittering \ Q \ 2-July1927-September1927  18
Blueprint showing a cross-section of a Lovejoy Delay Action Damper.7th May 1927West Wittering \ Q \ 2-July1927-September1927  19
Reverse side of a document showing a print room date stamp.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  20
Three graphs illustrating the performance characteristics of a Lovejoy Shock Absorber.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  21
Blank page marked with a Print Room stamp from Derby.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  22
Running a set of 19' rims on a 20 HP car and the need for modified wings.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  23
Issues of road shocks in steering systems, comparing .720 and .940 lead worm and nut designs.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  24
Steering sensitivity, the effects of different oils, and potential improvements to the worm and nut steering box.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  25
Report page discussing frictional conditions of nuts and worms during 'parking' and 'joggling' movements, referencing appended curves.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  26
Graph illustrating force versus load for a .720 worm with motorine coil under different operating conditions.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  27
Fuel starvation issues caused by petrol vaporization in the Autovac tank and the proposed solution of fitting a heat shield.19th Jul 1927West Wittering \ Q \ 2-July1927-September1927  28
Experimental work and resolution of faults on A.T. speedometers related to atmospheric temperature variations.8th Jul 1927West Wittering \ Q \ 2-July1927-September1927  29
Issues with switchbox charging contacts and the testing of a new quick break switch to prevent burning.20th Jul 1927West Wittering \ Q \ 2-July1927-September1927  30
Test report on a spare wheel carrier and luggage grid, discussing rigidity, vibration, and a required modification to prevent rattling.21th Jul 1927West Wittering \ Q \ 2-July1927-September1927  31
Oil frothing tests comparing Castor oil unfavourably with mineral oils.22th Jul 1927West Wittering \ Q \ 2-July1927-September1927  32
Friction issues in the 20 HP column and proposing a design change using L-shaped plates.10th Aug 1927West Wittering \ Q \ 2-July1927-September1927  33
American complaint regarding 40/50 HP steering stiffening and the subsequent investigation.1st Aug 1927West Wittering \ Q \ 2-July1927-September1927  34
The investigation of sticking and tightening issues in worm and nut mechanisms due to lubricants and temperature.1st Aug 1927West Wittering \ Q \ 2-July1927-September1927  35
Continued analysis of steering issues, comparing 'sticking' versus 'heavy' steering and the effects of tyre specifications.1st Aug 1927West Wittering \ Q \ 2-July1927-September1927  36
Steering tests carried out on the 9-EX car to investigate steering box oil temperature.1st Aug 1927West Wittering \ Q \ 2-July1927-September1927  37
Long duration camshaft experiments conducted on the Phantom engine.16th Aug 1927West Wittering \ Q \ 2-July1927-September1927  38
Ignition advance and the design of cams in relation to valve jump.5th Jul 1927West Wittering \ Q \ 2-July1927-September1927  39
Graph showing ignition advance versus RPM at the point of audible detonation for standard and long duration cams under full load.16th Aug 1927West Wittering \ Q \ 2-July1927-September1927  40
Blank document with a purple ink stamp from the Print Room.16th Aug 1927West Wittering \ Q \ 2-July1927-September1927  41
Graph comparing the performance of a standard versus an experimental 'long duration' camshaft on a Phantom engine.15th Aug 1927West Wittering \ Q \ 2-July1927-September1927  42
Blank document page with a purple ink stamp from the print room.16th Aug 1927West Wittering \ Q \ 2-July1927-September1927  43
Comparative tests on various grades of dynamo brushes for a 20 HP dynamo.18th Aug 1927West Wittering \ Q \ 2-July1927-September1927  44
Report comparing the performance and wear rates of different grades of machinery brushes.18th Aug 1927West Wittering \ Q \ 2-July1927-September1927  45
Comparison of two grades of dynamo brushes, 'Z' and 'G3417', including a table of their properties and test observations.18th Aug 1927West Wittering \ Q \ 2-July1927-September1927  46
The performance and wear of different grades of brushes and their effect on the commutator.18th Aug 1927West Wittering \ Q \ 2-July1927-September1927  47
The progress of brush tests for the standardized 40/50 dynamo.18th Aug 1927West Wittering \ Q \ 2-July1927-September1927  48
Internal memorandum detailing the results of an oil flow test on an X1-F-3 engine.8th Aug 1927West Wittering \ Q \ 2-July1927-September1927  49
The testing of an A.T. eddy-current speedometer regarding changes in reading due to temperature and time.19th Aug 1927West Wittering \ Q \ 2-July1927-September1927  50
Steering column friction, joggles, and performance issues on various car models.19th Aug 1927West Wittering \ Q \ 2-July1927-September1927  51
Cases of surface tracking on the moulded battery ignition rotor body.23th Aug 1927West Wittering \ Q \ 2-July1927-September1927  52
The potential failure of bakelite distributor heads and the effectiveness of safety gaps.23th Aug 1927West Wittering \ Q \ 2-July1927-September1927  53
Modifications and performance comparisons of chassis magnetos, including swapping units to address noise issues.23th Jun 1927West Wittering \ Q \ 2-July1927-September1927  54
Modifications and trials of a Sequence Starter motor with an inward sliding armature.24th Aug 1927West Wittering \ Q \ 2-July1927-September1927  55
Outlining the plan to test the 10-EX car at Brooklands and the arrangements for its transfer to London, noting the secrecy required for its modified engine.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  56
Experiments on the bedding of battery ignition contact points.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  57
Experiments with Delco-Remy and Bosch electrical components, focusing on contact point materials.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  58
Results of various ignition system component tests, including points, condensers, and levers.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  59
The performance of Delco-Remy contact breakers and various ignition points under test conditions.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  60
Experiments comparing Delco-Remy and Bosch ignition components and a note on magneto springs.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  61
Modifications to the Phantom cylinder block to reduce distortion and piston knock.1st Aug 1927West Wittering \ Q \ 2-July1927-September1927  62
The performance and adjustments of the Sequence Starter No.1 Scheme after modifications on chassis 9-EX.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  63
Technical analysis of actuator box and pinion engagement angles for a sequence starter.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  64
Analysis of 'thump' caused by backlash in actuator gearing and a comparison of different design schemes.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  65
Pinion and wheel teeth engagement, comparing sharp vs. rounded corners and schemes to prevent jamming.26th Aug 1927West Wittering \ Q \ 2-July1927-September1927  66
Further tests carried out on steering systems and lubrication oils.27th Aug 1927West Wittering \ Q \ 2-July1927-September1927  67
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