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
The 10,000-mile running test of R.W. wheels for 20 HP cars.1st Feb 1924West Wittering \ L \ 2Jan1924-March1924  Scan57
Defining the standard test conditions and performance specifications for chassis dynamos.1st Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan58
Dynamo temperature testing procedures and specifications, comparing bench tests to on-chassis performance.1st Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan59
Dynamo output curves under various temperature and test conditions, comparing different machines.3rd Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan60
Comparison of dynamo electrical performance, drive ratios, and output curves for various chassis models.3rd Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan61
Continued page discussing the cutting-in point of dynamos and the performance of a 20 HP dynamo.3rd Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan62
Inspection report for Dynamo 470 from chassis 6GII detailing brush wear and spring pressures.21th Jan 1924West Wittering \ L \ 2Jan1924-March1924  Scan63
Inspection report on a Goshawk Dynamo E3 from chassis 7GII after 5419 miles.7th Feb 1934West Wittering \ L \ 2Jan1924-March1924  Scan64
Brakes Scheme Des. 60, detailing tests of a servo-assisted braking system on a 40/50 car.1st Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan65
Advantages and testing of 'scheme DRS.60'.1st Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan66
The performance data of a Hispano servo, detailing the ratio of torque output to input.1st Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan67
The calculated values and efficiency of a servo mechanism.11th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan68
Secret document detailing the numerical particulars and performance specifications of an E.A.C. Dynamo.3rd Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan69
Specifications for an armature circuit, conductor, commutator, brushes, and dynamo settings.13th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan70
Experimental test results of machines with varying cast iron and M.S. pole pieces and cross-sectional areas.13th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan71
The performance of a machine fitted with Ubas steel pole forgings, detailing test results under cold and hot conditions.13th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan72
Output and performance characteristics of a machine, with comparisons to specified outputs and another generator.13th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan73
Technical note on the fixed control brush position for production purposes compared to the Goshawk.18th Dec 1923West Wittering \ L \ 2Jan1924-March1924  Scan74
Wiring diagrams for various E.A.C. Dynamo configurations.18th Dec 1923West Wittering \ L \ 2Jan1924-March1924  Scan75
Dynamo brush setting diagrams for Goshawk and E.A.C. engines, detailing positive and negative rotation settings.11th Dec 1923West Wittering \ L \ 2Jan1924-March1924  Scan76
Graph of ampere output curves for various controlled dynamos in hot conditions (75°C).3rd Jul 1914West Wittering \ L \ 2Jan1924-March1924  Scan77
Graph of open-circuit volt-speed curves for controlled dynamos under cold and hot conditions.14th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan78
Output performance of the 20 HP dynamo, including specified, actual, and engine-hot outputs.13th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan79
Modifications to a 20 HP dynamo and its performance.14th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan80
Summary of test results for a special 20 HP dynamo armature with a two-coil-per-slot design.14th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan81
The performance and testing of a 57 coil per slot armature and a 20 HP 'E' dynamo on an experimental chassis.14th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan82
The continued testing of dynamo No.161, detailing comparative wear tests of standard and narrower brushes.14th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan83
Wear test of two sets of brushes on a Goshawk Dynamo with two coils per slot.15th Feb 1924West Wittering \ L \ 2Jan1924-March1924  Scan84
Testing narrower brushes on Goshawk dynamos with two coils per slot.24th Jan 1934West Wittering \ L \ 2Jan1924-March1924  Scan85
The testing and electrical characteristics of a 20 HP dynamo with two coils per slot.11th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan86
Feasibility and thickness of control brushes to simplify the provision of parts.11th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan87
The testing of losses in exhaust pipes.28th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan88
Indicator work for E.A.C.11 engines, detailing carburettor and exhaust system tests.28th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan89
Analysing the effect of different exhaust manifold systems on engine performance and pressure.28th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan90
Early ignition requirements for EAC engines using a standard system.28th Mar 1924West Wittering \ L \ 2Jan1924-March1924  Scan91
Performance analysis graphs and indicator diagrams for an E.S.C. engine with a 4.6 compression ratio.27th Jun 1924West Wittering \ L \ 2Jan1924-March1924  Scan92
Series of four light spring diagrams comparing different exhaust manifold configurations on cylinder No. 1.20th Oct 1927West Wittering \ L \ 2Jan1924-March1924  Scan93
Design challenges of fitting louvres to polished bonnets for improved engine cooling.9th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan0
Solutions for exhaust joints burning out during testing.29th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan1
Reducing exhaust noise and vibrations for the 20 HP model.1st Sep 1924West Wittering \ L \ 2July1924-September1924  Scan3
Letter to coachbuilder Barker & Co. confirming design details for sports bodies on a 40/50 chassis.25th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan5
Urgent request for bolts, washers, and rubber distance pieces to be sent to Barkers for scuttle isolation on chassis 11.AU and 12.AU.25th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan8
Radiator tests conducted on a Hispano Car.1st Sep 1924West Wittering \ L \ 2July1924-September1924  Scan9
Radiator tests conducted on a Hispano car, comparing its performance to a 40/50 HP model.22th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan10
The heat given to cooling water on a Hispano engine.9th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan11
The thermal efficiency and heat losses of the Hispano engine.22th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan12
Energy diagram for a Hispano engine showing the percentage of initial heat energy against RPM.26th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan13
Testing a new egg shell black enamel from Messrs Noble's Industries on a Goshawk II steering column quadrant.19th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan16
Standardization of a scuttle isolation scheme for 20 HP & 40/50 HP models.19th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan17
Tests to alleviate engine boiling on the 40/50 HP model.8th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan18
Tests conducted to alleviate engine boiling troubles during hill climbs using indirect gears.8th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan19
Engine cooling performance related to fan speed and gear selection during hill climbs.18th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan20
The effects of gear selection on engine cooling performance.18th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan21
Graphs showing radiator temperature during hill climb tests under various speed and gear conditions.16th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan22
Bench experiments on a 40/50 standard six-bladed radiator fan, also tested with three blades removed.18th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan23
Determining fan power speed curves and the limitations caused by drive belt slippage at high speeds.18th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan24
Power tests for fans, discussing the basis for curves and the power-speed laws for six and three-blade fans.18th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan25
Fan power, belt slipping, and air stream velocity measurements for different fan blade configurations.18th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan26
Measuring fan thrust and air velocity using a revolving turntable apparatus.18th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan27
Secret memorandum regarding the new dashboard arrangement, Scheme 1847, detailing size reduction and component repositioning.17th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan29
Secret memo detailing modifications to the front springs and rubber buffer.17th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan30
New design for 12½% front springs with negative camber and a new rubber buffer.1st Sep 1924West Wittering \ L \ 2July1924-September1924  Scan31
Design of open spanners and the storage location for vehicle tools.16th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan32
Secret memorandum discussing stress analysis and potential failures in front springs.15th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan33
Bonnet and dashboard design, dimensions, and supply of related components for a vehicle.15th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan35
Secret memo discussing the design drawings for an automatic advance for battery and magneto ignition systems.1st Sep 1924West Wittering \ L \ 2July1924-September1924  Scan38
Outlining four solutions for 'Brake Thud' and discussing brake leverage adjustments.9th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan40
Secret memorandum proposing further experiments on road springs to test side load deflection and durability.12th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan41
Unavailability of car 4-G-11 and the arrangement of a substitute, 5-G-11.12th Sep 1925West Wittering \ L \ 2July1924-September1924  Scan42
From HS outlining the new procedure for testing and approving experimental cars prior to sales or mileage tests.1st Sep 1924West Wittering \ L \ 2July1924-September1924  Scan43
Secret memo discussing design and material specifications for a sports car body, including doors, paint, upholstery, footboards, and ventilators.9th Nov 1924West Wittering \ L \ 2July1924-September1924  Scan45
Boiling troubles and radiator efficiency for the 40/50 HP model.11th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan47
Radiator fan efficiency, comparing performance with a Hispano model and analysing horsepower requirements and fan belt issues at various speeds.11th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan48
Improving engine cooling through fan drive and bonnet ventilation.11th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan49
Engine cooling issues, specifically boiling, and potential improvements.11th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan50
Failure of demountable rims on 40/50 HP cars and the proposed solution of fitting a locking plate.8th Aug 1924West Wittering \ L \ 2July1924-September1924  Scan51
Statement that the 20 HP and 40/50 HP models can boil for half-an-hour without damage.11th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan52
20 HP steering issues, low-pressure tyres, and heavy steering complaints.11th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan53
Steering adjustments and the effects of low-pressure tyres on car performance.11th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan54
Radiator tests.11th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan55
Design, stiffness and braking of front springs for experimental cars in France.9th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan56
Telegram requesting the weights of two front springs for an 'E. car'.9th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan58
Mr. Royce's complaint regarding a primitive tool box design, initiating a plan to develop and supply a better version.10th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan61
Slow motion sway issue on a 20.HP. Landaulet GF.68 and proposing solutions.9th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan63
Secret memo discussing a drawing for proposed modifications to an exhaust system and requesting a quick test of the new scheme.8th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan64
Oil retention issues and potential solutions for 20 HP universal joints.6th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan65
Concerning the modification, prints, and specifications for a new sports body.9th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan66
The design and testing of front road springs, comparing different leaf thicknesses.5th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan67
Mr. Royce's preferred design for a spare wheel lock on the 20HP chassis.14th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan68
Secret memo regarding drawings for radiator and radiator shutters.9th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan69
Design and material choice for a Goshawk III gearbox lever and gate.14th Sep 1924West Wittering \ L \ 2July1924-September1924  Scan70
Secret memo discussing methods for disguising an experimental E.A.C.2 chassis to be sent to coachbuilders.1st Sep 1924West Wittering \ L \ 2July1924-September1924  Scan72
Importance of reliability over high performance in aero engines, referencing the Eagle and Super Eagle models.2nd Sep 1924West Wittering \ L \ 2July1924-September1924  Scan74
Secret memo detailing modifications to the front cross member and radiator suspension.2nd Sep 1924West Wittering \ L \ 2July1924-September1924  Scan76
Secret memorandum concerning the issue of engine water boiling and proposed solutions.2nd Sep 1924West Wittering \ L \ 2July1924-September1924  Scan77
Doubts about the effectiveness and justification of a frame stiffener for the 20.HP. chassis.1st Sep 1924West Wittering \ L \ 2July1924-September1924  Scan78
Experimental scuttle and dash isolation for the 20 HP and 40/50 chassis.1st Sep 1924West Wittering \ L \ 2July1924-September1924  Scan79
Secret memorandum discussing car radiator and fan design improvements to prevent overheating.1st Aug 1924West Wittering \ L \ 2July1924-September1924  Scan82
Approving a report and ordering work to begin on the 20.HP Dynamos Armature.29th Aug 1924West Wittering \ L \ 2July1924-September1924  Scan86
The Goshawk III front axle, detailing N. scheme 1839, bearings, wheel locking devices, and brake springs.28th Aug 1924West Wittering \ L \ 2July1924-September1924  Scan87
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