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
High-speed steering wobbles in Hispano and RR cars.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan227
Wear observed in the brake mechanism after a 10,000-mile test in France.11th Sep 1925West Wittering \ N \ July1925-September1925  Scan228
Acquiring and testing Derihon hydraulic shock absorbers as a potential alternative to the Houdaille model.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan229
The failure of the 20 HP steering tubular support and proposed improvements.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan230
Excessive wear on the Phantom radiator support and recommending an increase to the bearing surfaces.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan231
Issues with rusting and corrosion in the distributor head and proposed solutions involving increased ventilation.11th Sep 1925West Wittering \ N \ July1925-September1925  Scan232
Experimental sheet metal battery box for a 20 HP car after extensive road testing.14th Sep 1925West Wittering \ N \ July1925-September1925  Scan233
Instructions regarding a metal battery box removed from chassis 69H after extended mileage.9th Sep 1925West Wittering \ N \ July1925-September1925  Scan234
Modifications for chassis 8-EX for a 10,000-mile test.14th Sep 1925West Wittering \ N \ July1925-September1925  Scan235
Page 2 of an experimental report listing vehicle modifications.4th Sep 1925West Wittering \ N \ July1925-September1925  Scan236
List of mechanical and electrical parts specifications, including carriers, rods, and ignition components.14th Sep 1925West Wittering \ N \ July1925-September1925  Scan237
High-speed wobbles, comparing different car configurations and components.14th Sep 1925West Wittering \ N \ July1925-September1925  Scan238
Tests and analysis on the causes of wheel wobble.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan239
20 HP road spring failures observed during a 10,000-mile test.9th Sep 1925West Wittering \ N \ July1925-September1925  Scan240
Investigating the causes of high-speed steering wobbles.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan242
Investigating the causes of wheel wobble, specifically testing out-of-balance forces and balloon tyre deflection.15th Sep 1925West Wittering \ N \ July1925-September1925  Scan243
Tests conducted to understand and mitigate wheel wobble.15th Sep 1925West Wittering \ N \ July1925-September1925  Scan244
The causes of vehicle wobble, focusing on tyre damping, tread patterns, and other contributing factors.15th Sep 1925West Wittering \ N \ July1925-September1925  Scan245
High-speed steering wobbles.15th Sep 1925West Wittering \ N \ July1925-September1925  Scan246
Investigations into front wheel wobble, axle modifications, and brake behavior.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan247
Brief report on tests for high-speed steering wobbles using hydraulic dampers.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan248
High-speed steering wobbles caused by tyres running out of truth.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan249
Endurance run test of different types of connecting rod bearings.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan250
Reducing 'Phantom' exhaust noise using two types of modified silencers.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan251
Two alternative silencer designs for the New Phantom model.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan252
Modifications to exhaust silencers, fish-tails and lagging.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan253
Page discussing exhaust lagging and power losses from various silencers.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan254
Twisted front axle on a 20 HP car with 4-wheel brakes.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan256
Front axle (G.111 Type) that was handed in twisted after a chassis incident.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan257
Analysis of component damage resulting from a skid and impact with a bank.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan258
Blueprint showing the Brinell hardness test results and distortion on an axle.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan259
Covering memo for a report on recent battery experiences and observations made with a Cadmium Electrode.16th Sep 1925West Wittering \ N \ July1925-September1925  Scan260
Technical note on the condition and maintenance of accumulator elements.15th Sep 1925West Wittering \ N \ July1925-September1925  Scan261
Battery cell charging issues, focusing on negative plates, overcharging, and maintaining potential difference.15th Sep 1925West Wittering \ N \ July1925-September1925  Scan262
The use and interpretation of a Cadmium Electrode for checking accumulator cell condition.15th Sep 1925West Wittering \ N \ July1925-September1925  Scan263
Page detailing the charging process of a cell, voltage readings, and the function of a cadmium electrode.7th Sep 1925West Wittering \ N \ July1925-September1925  Scan264
Comparative weights analysis of front axle components for various car models.7th Sep 1925West Wittering \ N \ July1925-September1925  Scan265
Comparing the weights of wheel and hub components for the Silver Ghost, New Phantom, and Hispano models.17th Sep 1925West Wittering \ N \ July1925-September1925  Scan266
The first flight tests of a direct-drive Condor IV engine in a Vickers Condor IV machine.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan267
Engine, noting radiator issues, an oil leak, and modifications for Vickers and Hawker machines.17th Sep 1925West Wittering \ N \ July1925-September1925  Scan268
The Eagle XV 2-speed gear.7th Sep 1925West Wittering \ N \ July1925-September1925  Scan269
Clutch plate wear in a 6-Eagle-XV 2-speed gear.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan270
Clutch plate wear, adjustments following a test run, and gear case temperature.7th Sep 1925West Wittering \ N \ July1925-September1925  Scan271
Issues with gear changing and oil pressure in a scavenger pump system.7th Sep 1925West Wittering \ N \ July1925-September1925  Scan272
Oil pressures within a 2-speed gear operating cylinder during gear changes.17th Sep 1925West Wittering \ N \ July1925-September1925  Scan273
Oil pressure in the operating cylinder and the sticking of the change speed valve.17th Sep 1925West Wittering \ N \ July1925-September1925  Scan274
Valve sticking due to unbalanced pressure and a proposed solution.17th Sep 1925West Wittering \ N \ July1925-September1925  Scan275
Blueprint diagram showing suggested modifications to a change-speed valve for an Eagle XV 2-speed gear.31th Aug 1925West Wittering \ N \ July1925-September1925  Scan276
Rough sketch showing a plan view of ports in the operating chamber for an Eagle XX & Speed Gear.31th Aug 1925West Wittering \ N \ July1925-September1925  Scan277
Blank document page with a Print Room receipt stamp.17th Sep 1925West Wittering \ N \ July1925-September1925  Scan278
The Phantom 4-wheel braking distribution and performance.17th Sep 1925West Wittering \ N \ July1925-September1925  Scan279
Cars and their modifications for a visit to West Wittering.17th Sep 1925West Wittering \ N \ July1925-September1925  Scan280
The cause of high-speed steering wobble.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan281
Tests and observations on wheel wobble.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan282
Analysing the causes of wheel wobble and its relationship to toe-in/out and axle dynamics.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan283
Page analysing the self-exciting nature of high-speed wheel wobble.12th Aug 1925West Wittering \ N \ July1925-September1925  Scan284
Analyzing the gyroscopic effects on axle movement and wheel wobble.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan285
Continued page discussing the minimisation of road reaction during high-speed wobbling.8th Sep 1925West Wittering \ N \ July1925-September1925  Scan286
Comparing a standard induction system with an experimental small diameter aluminium induction pipe and water heated hot spot.8th Sep 1925West Wittering \ N \ July1925-September1925  Scan287
Tests with a new cylinder head and sparking plug position.18th Sep 1925West Wittering \ N \ July1925-September1925  Scan288
EAC engine with opposed sparking plugs and induction pipe in the cylinder head.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan289
Page detailing tests on induction systems, water jacket temperatures, and their effects on engine power and detonation.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan290
Investigating engine ignition timing, detonation, and spark plug positioning.12th Aug 1925West Wittering \ N \ July1925-September1925  Scan291
Ignition systems, comparing single and dual ignition efficiency and its effect on detonation.8th Sep 1925West Wittering \ N \ July1925-September1925  Scan292
Graph plotting Brake Horse Power against R.P.M. to compare different induction systems.23th Jul 1925West Wittering \ N \ July1925-September1925  Scan294
Graph of ignition advance curves against RPM for a single cylinder engine with a 5.2:1 compression ratio, showing conditions for max torque and no detonation.18th Aug 1925West Wittering \ N \ July1925-September1925  Scan295
Graph of ignition firing position against engine RPM for a single-cylinder engine with a 5.2 to 1 compression ratio.19th Aug 1925West Wittering \ N \ July1925-September1925  Scan296
Largely blank document page with a red 'Print Room' stamp.19th Aug 1925West Wittering \ N \ July1925-September1925  Scan297
The status of instructions received for the Eagle XVI engine components.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan298
'Silver Ghost' steering, arguing for the necessity of wheel balancing to prevent high-speed wobbles.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan299
High-speed steering wobble issues on 40/50 HP cars.20th May 1925West Wittering \ N \ July1925-September1925  Scan300
Experiments on materials for H.T. distributor sparking points.22th Sep 1925West Wittering \ N \ July1925-September1925  Scan301
Ignition system ventilation issues, comparing climates and component materials.22th Sep 1925West Wittering \ N \ July1925-September1925  Scan302
Test report comparing a standard distributor head with one modified with holes for extra ventilation.11th Jul 1925West Wittering \ N \ July1925-September1925  Scan303
10,000-mile bench test of a standard contact breaker and distributor.22th Jul 1925West Wittering \ N \ July1925-September1925  Scan304
10,000-mile test of a standard distributor and platinum points, including effects of ventilation on corrosion.4th Sep 1925West Wittering \ N \ July1925-September1925  Scan305
The experimental testing of Redmanol encased battery ignition coils on various chassis.23th Sep 1925West Wittering \ N \ July1925-September1925  Scan306
Comparing Redmanol coil cases to stabalite ones, noting cost and quality differences.23th Sep 1925West Wittering \ N \ July1925-September1925  Scan307
Comparing the weight of a standard Dunlop wheel with a new Dunlop well-based wheel.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan308
Steering complaint on a 20 HP car, detailing axle specifications.26th Sep 1925West Wittering \ N \ July1925-September1925  Scan309
Comparing the performance of Derihon, Houdaillle, and Berkshire hydraulic shock absorbers.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan310
Page on shock absorber testing, noting issues with lost movement and wobbles.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan311
Tests conducted to understand and mitigate high-speed steering wobbles.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan312
Continued discussion on the design and mechanics of an equalised braking system.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan313
10,000-mile test of a 'Phantom' car, detailing wheel and steering modifications.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan314
High-speed steering wobble tests on a Silver Ghost fitted with a torque control front axle.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan315
Addressing over-oiling issues in the 'Phantom' engine by modifying the rockers.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan316
Tests conducted on connecting rod big end bearings.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan317
22.5-hour test of loose white metal lined connecting rod bearings.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan318
Cylinder block travel relative to the crankshaft and the performance of loose bushes.12th Jun 1925West Wittering \ N \ July1925-September1925  Scan319
Twisted front axle found after a 10,000-mile test in France.23th Feb 1925West Wittering \ N \ July1925-September1925  Scan320
Technical drawing illustrating the distortion and Brinell hardness of a front axle, showing off-side and near-side views.29th Sep 1925West Wittering \ N \ July1925-September1925  Scan321
Tests conducted on an aero engine petrol pump.29th Sep 1925West Wittering \ N \ July1925-September1925  Scan322
The testing and troubleshooting of a petrol pump, part number E.25588.29th Sep 1925West Wittering \ N \ July1925-September1925  Scan323
Petrol pump performance, testing relief valve leakage and delivery rates at various speeds.29th Sep 1925West Wittering \ N \ July1925-September1925  Scan324
Comparing the performance of a pump against an R.A.E. type pump.29th Sep 1925West Wittering \ N \ July1925-September1925  Scan325
Investigations into high-speed steering wobbles and the effect of castoring angle.1st Sep 1925West Wittering \ N \ July1925-September1925  Scan326
High-speed steering wobble and tests on side steering tube components.29th Sep 1925West Wittering \ N \ July1925-September1925  Scan327
Diagram comparing high-speed steering wobble with and without a connected side-steering tube.30th Sep 1925West Wittering \ N \ July1925-September1925  Scan328
Front axle control, the bending of the 20HP front axle, and proposed modifications to the brake servo and axle design.1st Oct 1925West Wittering \ N \ October1925-December1925  Scan0


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