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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Tests on a modified petrol supply system using a reduced volume pump and vacuum tank.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan241
Table of results for Autovac tests showing induction pipe depression on a 40/50 Silver Ghost.5th May 1923West Wittering \ N \ 2October1925-December1925  Scan242
Table of results from Autovac tests on a 40/50 HP Silver Ghost using an old pressure pump.1st Dec 1925West Wittering \ N \ 2October1925-December1925  Scan243
Cover memo for a report on chassis 8-EX after completing 7,500 miles.1st Dec 1925West Wittering \ N \ 2October1925-December1925  Scan244
Chassis 8 EX after completing 7,500 miles, detailing engine condition, lubrication, valves, pistons, and ignition plugs.2nd Dec 1925West Wittering \ N \ 2October1925-December1925  Scan245
Condition report on various engine components, including details on an oil leak and exhaust system modifications.2nd Dec 1925West Wittering \ N \ 2October1925-December1925  Scan246
Vehicle condition report detailing the state of various engine and exhaust components.2nd Dec 1925West Wittering \ N \ 2October1925-December1925  Scan247
Condition report on various vehicle components including ignition, engine, and steering systems.2nd Dec 1925West Wittering \ N \ 2October1925-December1925  Scan248
Condition report on various vehicle components including the gearbox, servo, clutch, and starter motor.10th Oct 1925West Wittering \ N \ 2October1925-December1925  Scan249
The condition of various chassis components including brakes, axles, steering, springs and headlights after testing.10th Oct 1925West Wittering \ N \ 2October1925-December1925  Scan250
Condition report on the front shock absorbers, rear axle, rear brakes, and petrol tank.10th Oct 1925West Wittering \ N \ 2October1925-December1925  Scan251
Post-test condition report for various vehicle components and a summary of test statistics.7th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan252
The causes and solutions for 'servo jaggers' in braking systems.7th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan253
The comparison of 3 and 7 oil feeds to crankshaft bearings.7th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan254
New Phantom engine oil flow, comparing tests with 7 and 3 direct oil feeds.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan255
Oil consumption and discharge through engine bearings, comparing results from 3 and 7 oil feeds.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan256
With a graph showing oil consumption and discharge for an engine with 7 and 3 bearing feeds.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan257
Investigating oil pressure differences between main and intermediate engine bearings.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan258
Showing engine oil pressure in various bearings plotted against engine RPM.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan259
Calculated oil pressure at big ends due to centrifugal force and the effects of bearing leakage.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan260
Report and graph detailing oil consumption for the 40/50 HP (Silver Ghost) engine, with comparisons to the Phantom model.7th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan261
Oil temperature and flow characteristics for Phantom and 40/50 HP engines.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan262
Page discussing the factors influencing oil temperature in bearings and comparing different oil flows.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan263
The failure of bolts holding the front end of a Phantom's subframe.12th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan264
Magnetos without automatic advance for the new Phantom chassis.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan266
The comparative bench tests of B.T.H. and Watford magnetos, focusing on noise, weight, and price.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan267
Comparing the specifications of Watford and B.T.H. magnetos.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan268
Endurance, circuit, and utility tests on two magnetos with tabulated results.12th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan269
Magneto and Remy coil tests, detailing spark gap and performance measurements.18th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan270
Page comparing high and low speed sparking characteristics of different magnetos.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan271
Continuation on steering column backlash and magneto noise comparison.10th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan272
Specification of performance for a 6-cylinder magneto without automatic advance for the 40/50 car.25th Feb 1925West Wittering \ N \ 2October1925-December1925  Scan273
Testing procedures for a magneto's spark-producing capability under various adverse conditions and speeds.25th Feb 1925West Wittering \ N \ 2October1925-December1925  Scan274
Specifications for magneto operation, including minimum sparking speed and timing adjustments.8th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan275
Graph showing the variation of O.C. volts with the hand lever position for a B.T.H. Magneto Type FM6.8th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan276
Curve showing the variation of O.C. volts with cam lever position for a Watford E06A Magneto No 73970.27th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan277
Tests on high-speed steering wobbles by altering wheel and pivot pin configurations.8th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan278
Steering wobbles, friction, and the effect of wheel dishing.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan279
Schematic showing the distance between the point of intersection of the pivot and the centre line of the tyre.8th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan280
The Autovac Galometer, an instrument for registering the volume of petrol used by an engine.9th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan281
The operation and calibration of the Autovac fuel measurement system, page 2.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan282
The relative petrol levels in a float chamber and outer reservoir.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan283
Petrol levels, a Galometer, and fitting a measuring Autovac to a Phantom tank.12th Aug 1925West Wittering \ N \ 2October1925-December1925  Scan284
Comparing the particulars of a 'Measuring Autovac' with a 'Standard Autovac'.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan285
Comparing the Stewart Vacuum Feed system with the Autovac system on a Phantom engine.12th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan286
Comparing the Stewart tank float and the Autovac system's effect on the engine's induction.14th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan287
Cross-sectional diagram of a Stewart Vacuum Tank with component annotations and dimensions.15th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan288
The 10,000 miles test of the 8-EX car in France, detailing oiling performance.15th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan289
The performance of Chassis 8 EX following a 10,000-mile test.10th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan290
Test report on the condition of various engine components following a mileage run.1st Sep 1970West Wittering \ N \ 2October1925-December1925  Scan291
The condition and performance of controls, induction pipe, carburetter, and exhaust system components after testing.1st Sep 1970West Wittering \ N \ 2October1925-December1925  Scan292
Status report on various vehicle components including the exhaust, magneto, suspension, and drive systems.1st Sep 1970West Wittering \ N \ 2October1925-December1925  Scan293
Test report on the condition of various vehicle components after testing.1st Sep 1970West Wittering \ N \ 2October1925-December1925  Scan294
Condition of various vehicle components after testing, including the bonnet, radiator, and steering system.1st Sep 1970West Wittering \ N \ 2October1925-December1925  Scan295
Test report on the performance of steering, gearbox, servo, starter motor, and other vehicle components.1st Sep 1970West Wittering \ N \ 2October1925-December1925  Scan296
Test report detailing the condition and wear of various chassis and powertrain components.1st Sep 1970West Wittering \ N \ 2October1925-December1925  Scan297
Condition report on front brakes, springs, headlights, and shock absorbers following a 10,000-mile test.1st Sep 1970West Wittering \ N \ 2October1925-December1925  Scan298
Condition report on various vehicle components after a mileage test, page 10.1st Oct 1925West Wittering \ N \ 2October1925-December1925  Scan299
The condition of a vehicle's body subframe, pedals, and chassis after testing, including performance data.15th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan300
Oiling tests for the Phantom model.15th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan301
Oil feed and consumption tests for the Phantom and Silver Ghost models.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan302
Showing oil consumption on a Silver Ghost with graphs for varying oil pressures and flow rates from road tests.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan303
Oil feed arrangements and leakage tests on Phantom and Silver Ghost cars.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan304
Oil discharge from Phantom engine bearings, comparing results with and without grooves in the intermediate bearings.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan305
The causes of overoiling and the factors that control oil consumption.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan306
Methods to reduce oil consumption in engines, specifically discussing 'L' section piston rings and piston designs.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan307
Modifications being made to a Phantom engine for bench and road testing.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan308
Unsuccessful testing of a spring-based solution for 'servo jaggers' and recommending flexibility in the servo engagement.16th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan309
Daimler car, analysing the reasons for a lower risk of wobbles.31th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan310
The particulars and engine performance of a new Daimler car following a trial run.31th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan311
Over-oiling tests, gearbox noise, and clutch performance.31th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan312
Evaluating the steering, brakes, suspension, and rear axle performance of a vehicle.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan313
The road performance of a Daimler car, detailing its acceleration, high-speed vibrations, and a hill climb test.31th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan314
Road tests of a Daimler car, focusing on balloon tyres and wobble risk.31th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan315
Trial run report for a new Daimler, detailing vehicle particulars and engine performance.31th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan316
Test report on engine over-oiling, gearbox noise, clutch performance, and steering gearing.1st Dec 1925West Wittering \ N \ 2October1925-December1925  Scan317
Test report page evaluating vehicle performance, covering tyres, steering, brakes, and suspension.31th Dec 1925West Wittering \ N \ 2October1925-December1925  Scan318
The road performance and general impression of a car, including a timed hill climb test on Brockley Hill.1st Dec 1925West Wittering \ N \ 2October1925-December1925  Scan319
The performance and specifications of 'India' front springs with varying stiffness on 20 HP cars.1st Jul 1925West Wittering \ N \ July1925-September1925  Scan0
Continued memo asking which springs to standardise.27th Jun 1925West Wittering \ N \ July1925-September1925  Scan1
Secret memo discussing the testing of stronger springs for front wheel brakes on cars intended for India.29th Jun 1925West Wittering \ N \ July1925-September1925  Scan2
Tests of contact breaker rubbing block material, with a focus on Bone Grey Fibre.1st Jul 1925West Wittering \ N \ July1925-September1925  Scan3
Test report comparing the properties of bone grey fibre and continental bakelite, recommending its standardisation.7th Jul 1925West Wittering \ N \ July1925-September1925  Scan4
Hygroscopic and wear tests comparing bakelite and bone grey fibre materials.15th Jul 1924West Wittering \ N \ July1925-September1925  Scan5
Series of wear tests on continental bakelite and bone grey fibre materials under various lubrication and running conditions.1st Jul 1925West Wittering \ N \ July1925-September1925  Scan6
Test report detailing wear results for 'Bone grey fibre' samples under various chassis and bench conditions.1st Jul 1925West Wittering \ N \ July1925-September1925  Scan7
Test results for bone grey fibre samples run on different chassis.17th Jun 1925West Wittering \ N \ July1925-September1925  Scan8
Report on the R.A.E. petrol pump being fitted to Direct Drive Condor engines.1st Jul 1925West Wittering \ N \ July1925-September1925  Scan9
The performance of a geared type R.A.E. petrol pump.27th Jun 1925West Wittering \ N \ July1925-September1925  Scan10
Performance data report comparing the average of 8 R.A.E. pumps with an original R.A.E. pump on a Condor engine.22th Jun 1925West Wittering \ N \ July1925-September1925  Scan11
The alterations for the 'W' series chassis.1st Jul 1925West Wittering \ N \ July1925-September1925  Scan12
Proposal to fit duralumin connecting rods to the E.A.C. engine to reduce vibration and weight.3rd Jul 1925West Wittering \ N \ July1925-September1925  Scan13
Customer complaints of uneven slow running caused by the autovac system on Silver Ghost cars.4th Jul 1925West Wittering \ N \ July1925-September1925  Scan14
Troubleshooting a rich fuel mixture issue caused by the autovac system.4th Jul 1925West Wittering \ N \ July1925-September1925  Scan15
Letter from Autovac Mfg. Co. regarding experiments to improve their apparatus.3rd Jul 1925West Wittering \ N \ July1925-September1925  Scan16
Fitting new aluminium induction parts, using water heating, and improved tappets to a 7-EX car chassis.6th Jul 1925West Wittering \ N \ July1925-September1925  Scan17
Wider dash, louvered bonnet, and radiator modifications.6th Jul 1925West Wittering \ N \ July1925-September1925  Scan18
Modifications to the radiator, luggage grid, and gearbox mechanism.1st Jul 1925West Wittering \ N \ July1925-September1925  Scan19
Issues with springs, petrol tank design, and instrument layout.6th Jul 1925West Wittering \ N \ July1925-September1925  Scan20
Modifications to a cylindrical tank, rear brake adjustment covers, shutter control, and a list of further new parts to be fitted.1st Jul 1925West Wittering \ N \ July1925-September1925  Scan21


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