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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Engine performance issues like misfiring and the 'fading away' effect observed during carburetter experiments.25th Jul 1912Box 1 \ 3  B001_X 93-page32
Planned dynamometer experiments comparing two carburettors, including the Polyrhoe.19th Aug 1912Box 1 \ 3  B001_X 93-page33
Experimental Department report on the cause and cure for explosions in the silencer.19th Aug 1912Box 1 \ 3  B001_X 93-page34
Diagnosis of engine explosions in the silencer under various operating conditions.20th Aug 1912Box 1 \ 3  B001_X 93-page35
Report to Mr Royce from the Experimental Department regarding carburetter tests for a special throttle valve.20th Aug 1912Box 1 \ 3  B001_X 93-page36
Technical note detailing the causes of engine explosions and misfires.25th Nov 1912Box 1 \ 3  B001_X 93-page37
From F.H. Royce regarding distressing exhaust explosions and gearbox noise on Mr Johnson's car.25th Nov 1912Box 1 \ 3  B001_X 93-page38
Mr. Royce's remarks on an urgency report regarding improvements in throttle and cutting off.28th Apr 1913Box 1 \ 3  B001_X 93-page39
Chasing the progress of experiments on carburetter explosions in the silencer.29th Apr 1913Box 1 \ 3  B001_X 93-page40
Chasing up an overdue experiment on carburettor explosions in the silencer, requested by Mr Royce.29th Apr 1913Box 1 \ 3  B001_X 93-page41
Cover memo requesting an update on instructions for experiments concerning explosions in the silencer.27th May 1913Box 1 \ 3  B001_X 93-page42
Engine exhaust backfiring, known as 'firing in silencer', and the potential effects of boilers and a new cylinder head.28th Apr 1925Box 1 \ 3  B001_X 93-page43
Issue of popping in the exhaust on the new Phantom model and modifications made to address it.6th Mar 1926Box 1 \ 3  B001_X 93-page44
Investigation into detonation issues on Phantom engines, proposing increased turbulence in the combustion chamber as a solution.1st Mar 1926Box 1 \ 3  B001_X 93-page45
Phantom engine performance issues, comparing fuel consumption, self-ignition, and detonation to the Silver Ghost.1st Mar 1926Box 1 \ 3  B001_X 93-page46
Engine detonation tests, focusing on the effects of ignition plugs and engine speed.1st Mar 1926Box 1 \ 3  B001_X 93-page47
Engine detonation tests involving varied carburetter air temperatures and news of a new cylinder head for the Phantom.11th May 1926Box 1 \ 3  B001_X 93-page48
Customer complaints about popping and explosions in the New Phantom exhaust.11th May 1926Box 1 \ 3  B001_X 93-page49
The issue of popping and explosions in the exhaust of the New Phantom model.10th May 1926Box 1 \ 3  B001_X 93-page50
Governor control issues and exhaust popping in the New Phantom model.10th May 1926Box 1 \ 3  B001_X 93-page51
The causes of explosions in the silencer, related to the carburettor's operation at low throttle.18th May 1926Box 1 \ 3  B001_X 93-page52
Engine issues for car 7-EX, specifically firing in the exhaust, self-ignition, and running backwards after extended mileage.4th Jun 1926Box 1 \ 3  B001_X 93-page53
Engine pinking and detonation, and the suitability of using National Benzol Mixture fuel.14th Jun 1926Box 1 \ 3  B001_X 93-page54
Experiments to determine the cause of explosions in the silencer of a Phantom vehicle.1st Aug 1926Box 1 \ 3  B001_X 93-page55
Analysis into the cause of continuous explosions when an engine is coasting with a slightly open throttle.13th Aug 1926Box 1 \ 3  B001_X 93-page56
Experimental results report on engine firing issues related to exhaust manifold, mixture strength, and throttle settings.1st Aug 1926Box 1 \ 3  B001_X 93-page57
Analysis of engine explosions in the exhaust manifold under different throttle and mixture conditions.1st Aug 1926Box 1 \ 3  B001_X 93-page58
The causes of explosions in the exhaust manifold and silencer.23th Aug 1926Box 1 \ 3  B001_X 93-page59
Experiments concerning explosions in the silencer of a Phantom model, focusing on the effect of admitting air to the induction pipe.23th Aug 1926Box 1 \ 3  B001_X 93-page60
Analysis of engine running conditions, focusing on air dilution, silencer explosions, and the effects of a rich mixture.23th Aug 1926Box 1 \ 3  B001_X 93-page61
Investigation into irregular firing and exhaust explosions related to carburettor mixture and ignition timing.23th Aug 1926Box 1 \ 3  B001_X 93-page62
Technical report on tests to reduce explosions in the exhaust system using wire gauze and considering the effect of the governor.23th Aug 1926Box 1 \ 3  B001_X 93-page63
Summary of methods to prevent continuous explosions in the silencer.23th Aug 1926Box 1 \ 3  B001_X 93-page64
Experiments to fix silencer explosions and autovac issues on the 8-EX car.1st Sep 1926Box 1 \ 3  B001_X 93-page65
Letter concerning a customer complaint about a backfiring issue on a New Phantom chassis.10th Sep 1926Box 1 \ 3  B001_X 93-page66
Investigations into explosions in the silencer, comparing the Phantom to the Silver Ghost.11th Sep 1926Box 1 \ 3  B001_X 93-page67
Engine issue known as 'popping back', its causes, and a comparison with other engines.13th Sep 1926Box 1 \ 3  B001_X 93-page68
Letter from the American branch about explosions in the silencer when descending hills.17th Sep 1926Box 1 \ 3  B001_X 93-page69
Requesting an update on the examination of a Phantom car reported to have explosions in the silencer.5th Oct 1926Box 1 \ 3  B001_X 93-page70
Investigation into the cause of explosions in silencers.10th Oct 1926Box 1 \ 3  B001_X 93-page71
Test procedure for diagnosing explosions in a Phantom model's silencer by creating an adjustable air leak.7th Oct 1926Box 1 \ 3  B001_X 93-page72
Summary of conclusions from reports on a fault causing explosions in the silencer.7th Oct 1926Box 1 \ 3  B001_X 93-page73
Conditions under which explosions occur in the silencer of a Phantom chassis.7th Oct 1926Box 1 \ 3  B001_X 93-page74
The causes of engine explosions related to governor and throttle settings.7th Oct 1926Box 1 \ 3  B001_X 93-page75
Analysis of methods to eliminate induction system explosions by altering the air-fuel mixture.7th Oct 1926Box 1 \ 3  B001_X 93-page76
Engine slow running, throttle issues, and causes of firing in the silencer.7th Oct 1926Box 1 \ 3  B001_X 93-page77
Throttle closing issues caused by carbon deposits and worn spindle bearings.7th Oct 1926Box 1 \ 3  B001_X 93-page78
List of general tests carried out with regard to explosions in the silencer.7th Oct 1926Box 1 \ 3  B001_X 93-page79
List of checks and potential improvements for engine running faults relating to the throttle and carburetter.7th Oct 1926Box 1 \ 3  B001_X 93-page80
Investigation into the causes of silencer explosions, comparing the Silver Ghost and Phantom models.7th Oct 1926Box 1 \ 3  B001_X 93-page81
Comparison of ignition characteristics and throttle design between the Silver Ghost and Phantom models.7th Oct 1926Box 1 \ 3  B001_X 93-page82
Technical note comparing silencer explosions and fuel mixture requirements between the Silver Ghost and Phantom models.8th Oct 1926Box 1 \ 3  B001_X 93-page83
Explosions in a silencer, referencing the Barker Trials Car.8th Oct 1926Box 1 \ 3  B001_X 93-page84
Explosions and engine stalling issues in the New Phantom model.18th Oct 1926Box 1 \ 3  B001_X 93-page85
Telegram about trying a Phantom vehicle, investigating silencer explosions and viewing the latest standard.19th Oct 1926Box 1 \ 3  B001_X 93-page86
Telegram message regarding a chassis with 'minimum explosions' and a request to test drive it.20th Oct 1926Box 1 \ 3  B001_X 93-page87
Test of a special throttle ball bearing to prevent silencer explosions in Phantom cars.20th Oct 1926Box 1 \ 3  B001_X 93-page88
Customer complaints about engine noise and throttle issues, proposing testing a car without a governor.22th Oct 1926Box 1 \ 3  B001_X 93-page89
Two potential modifications for the Phantom throttle control, weighing cost, performance, and driver experience.2nd Nov 1926Box 1 \ 3  B001_X 93-page90
Comparing governor and positive throttle control systems to prevent explosions in the silencer.15th Nov 1926Box 1 \ 3  B001_X 93-page91
Report page discussing throttle and governor control adjustments to prevent explosions in the silencer.7th Oct 1926Box 1 \ 3  B001_X 93-page92
Analysis of engine explosions, comparing the Phantom model unfavourably with the Silver Ghost.7th Oct 1926Box 1 \ 3  B001_X 93-page93
Performance noting it is quieter than the Phantom and a mention of an upcoming report on the roller bearing throttle.17th Oct 1927Box 1 \ 3  B001_X 93-page94
Cause of 'spitting in silencer' being badly bedded butterfly throttles and a proposed fix.17th Oct 1927Box 1 \ 3  B001_X 93-page95
Proposal to experiment with a third valve in an internal combustion engine to address detonation.11th Nov 1927Box 1 \ 3  B001_X 93-page96
Page 2 of a letter with a handwritten response discussing engine detonation, turbulence, and volumetric efficiency.21th Dec 1927Box 1 \ 3  B001_X 93-page97
Engine detonation, roughness, and volumetric efficiency.21th Dec 1927Box 1 \ 3  B001_X 93-page98
The types and quantities of plugs taken to France.3rd Nov 1932Box 1 \ 4  B001_X 100a-page001
Carburettor choking due to fuel supply issues and a subsequent starter motor failure.1st Jan 1932Box 1 \ 4  B001_X 100a-page002
Flywheel pinion issue, petrol consumption, and a noise from the electric clock.5th Nov 1932Box 1 \ 4  B001_X 100a-page003
The oil temperature of a Peregrine engine during a run from Derby to London.5th Nov 1932Box 1 \ 4  B001_X 100a-page004
Letter to G.W. Hancock requesting feedback on engine mounting, shock absorbers, and exhaust system performance following a trip.5th Nov 1932Box 1 \ 4  B001_X 100a-page005
Typed memo discussing oil cooling and confirming travel arrangements to France.5th Nov 1932Box 1 \ 4  B001_X 100a-page006
Report detailing multiple vehicle failures including issues with the carburettor, bearings, oil pressure, and high oil temperature.6th Nov 1932Box 1 \ 4  B001_X 100a-page007
Report detailing issues with a vehicle's steering, stability, oil pump, water loss, and dynamo output.9th Oct 1934Box 1 \ 4  B001_X 100a-page008
Post office telegram from Chateauroux, France confirming arrival and advising a report is in the post.9th Oct 1934Box 1 \ 4  B001_X 100a-page009
Informational notice about postal and telegram services.7th Nov 1932Box 1 \ 4  B001_X 100a-page010
Letter detailing repair and adjustment work on a vehicle, written on 'Hotel de France' letterhead.7th Nov 1932Box 1 \ 4  B001_X 100a-page011
Various faults including slack brake ropes, a loose silencer, a blocked drain plug, a weak spare wheel carrier, and oil leaks.7th Nov 1932Box 1 \ 4  B001_X 100a-page012
With diagrams illustrating a design issue with an oil chamber and its suggested correction.8th Nov 1932Box 1 \ 4  B001_X 100a-page013
Tests on a side torque damper and engine mounting dampers.8th Nov 1932Box 1 \ 4  B001_X 100a-page014
Test results on engine torque reaction with different damper configurations and speeds.8th Nov 1932Box 1 \ 4  B001_X 100a-page015
Torque reaction and shock absorber performance.8th Nov 1932Box 1 \ 4  B001_X 100a-page016
Engine issues, specifically lateral play in the ignition distributor and carburetor adjustments.8th Nov 1932Box 1 \ 4  B001_X 100a-page017
Knock from a connecting link and a loss of water from the radiator.9th Nov 1932Box 1 \ 4  B001_X 100a-page018
Series of tests on front torque reaction dampers to determine their effectiveness.9th Nov 1932Box 1 \ 4  B001_X 100a-page019
Test report on engine torque dampers and an exhaust silencer, concluding with a petrol pipe failure.9th Nov 1932Box 1 \ 4  B001_X 100a-page020
Short memo from G.W.H. confirming the dispatch of daily mileage reports from France.9th Nov 1932Box 1 \ 4  B001_X 100a-page021
Changing engine mounting rubbers, modifying the water pump to reduce water loss, and identifying sources of rigidity affecting the flexible engine mounting.10th Nov 1932Box 1 \ 4  B001_X 100a-page022
Issues with the ignition distributor, oil levels, road springs, and bonnet alignment.10th Nov 1932Box 1 \ 4  B001_X 100a-page023
Engine mounting tests, specifically concerning torque reaction dampers, rubber softness, and radiator water loss.10th Nov 1932Box 1 \ 4  B001_X 100a-page024
Engine tightness and issues with front shock damper mounting.30th Nov 1932Box 1 \ 4  B001_X 100a-page025
Fractured petrol pipe on a car and the arrangement for a replacement part.11th Nov 1932Box 1 \ 4  B001_X 100a-page026
'Peregrine Test in France', including alternative engine mountings and a test on a Dubonnet car.11th Nov 1932Box 1 \ 4  B001_X 100a-page027
Testing aniline as a lubricant additive, alongside notes on engine stiffness, water loss, and carburation.11th Nov 1932Box 1 \ 4  B001_X 100a-page028
Vehicle component fault and performance report, page 2.11th Nov 1932Box 1 \ 4  B001_X 100a-page029
Oil leak from the rear universal joint of the propeller shaft.11th Nov 1932Box 1 \ 4  B001_X 100a-page030
Letter to a representative in France discussing car development progress, including exhaust, brake, engine, and clutch issues, and arranging a visit.11th Nov 1932Box 1 \ 4  B001_X 100a-page031
Vehicle performance issues including high oil temperature, oil and water loss, and component faults following a 500-mile test run.12th Nov 1932Box 1 \ 4  B001_X 100a-page032
Engine roughness over 60 m.p.h. and a squeaking front spring after driving on French roads.13th Nov 1932Box 1 \ 4  B001_X 100a-page033


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