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
Standardisation sheet cancelling a previous agreement on 25% stiffer front springs, brackets, and shackles.15th Sep 1924West Wittering \ L \ July1924-September1924  Scan18
Insufficient lubrication and squeaking in the 20 HP side steering tube joint.8th Sep 1924West Wittering \ L \ July1924-September1924  Scan19
20 HP dynamo commutation tests when running with reversed electrical polarity.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan20
Proposal to send a mechanic to investigate and cure a brake thumping complaint on a specific car.2nd Sep 1924West Wittering \ L \ July1924-September1924  Scan21
Radiator tests and heat given to jacket water on a standard 40/50 HP car.12th Jul 1928West Wittering \ L \ July1924-September1924  Scan22
Radiator heat dissipation data and test conditions.12th Jul 1923West Wittering \ L \ July1924-September1924  Scan23
Radiator cooling capacity, fan belt slip, and engine boiling issues when climbing hills.11th Sep 1924West Wittering \ L \ July1924-September1924  Scan24
Analyzing engine cooling performance and water temperature rise under various loads and gear selections.11th Sep 1924West Wittering \ L \ July1924-September1924  Scan25
Analysing radiator performance, heat flow, and the influence of outside air temperature.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan26
Continued note on radiator temperature calculations, mentioning the density of air.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan27
Graph showing heat flow to jacket water per litre versus engine RPM for a 40/50 HP high compression car engine.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan28
Graph plotting heat flow to jacket water against horsepower at the road wheels for a 40/50 HP engine under various loads.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan29
Curve graph showing horsepower required to drive a 40/50 HP car up a 1 in 12 gradient.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan30
Graph showing heat given to the engine jacket water and heat dissipated by the radiator for a 40/50 HP car.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan31
Graph comparing the air stream velocity of a 40/50 standard fan with three and six blades at various speeds.18th Sep 1924West Wittering \ L \ July1924-September1924  Scan32
Graph of the power absorbed by a 40/50 standard fan at various speeds, comparing six and three-bladed versions.18th Sep 1924West Wittering \ L \ July1924-September1924  Scan33
Correcting the fan speed ratio for the 40/50 HP car from a previous blueprint.11th Sep 1924West Wittering \ L \ July1924-September1924  Scan34
Oil leakage issues from 20.HP universal joints and potential solutions.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan37
Tests conducted on a Micklewood 2-stroke engine.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan40
The performance of a Micklewood 2-stroke engine.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan41
Engine indicator cards, discussing performance, pressure, timing, and factors affecting them.12th Jul 1923West Wittering \ L \ July1924-September1924  Scan42
Engine pumping losses, exhaust valve performance, and results from motoring tests under various conditions.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan43
Engine piston friction, scavenging, and pumping losses.5th Sep 1924West Wittering \ L \ July1924-September1924  Scan44
The need to redesign engine components like the rotary valve for improved efficiency and performance.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan45
Performance analysis and specification diagrams for the Micklewood 2-stroke engine.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan46
Performance indicator diagrams for a Micklewood 2-stroke engine, showing pressure vs. crank angle.1st Sep 1924West Wittering \ L \ July1924-September1924  Scan47
Cross-section diagram of a super-atmospheric, scavenged, two-stroke-cycle engine.6th Sep 1924West Wittering \ L \ July1924-September1924  Scan48
Request for the 'Brown Goshawk' car to be delivered to the Russell Hotel.6th Sep 1924West Wittering \ L \ July1924-September1924  Scan49
Technical memorandum detailing the standardisation and testing of batteries for the 20 HP chassis.9th Sep 1924West Wittering \ L \ July1924-September1924  Scan50
Comparison report on the failure of C.A.V. and Exide batteries after a life test.4th Sep 1924West Wittering \ L \ July1924-September1924  Scan51
The condition and testing of various car batteries, including Peto & Radford and C.A.V. models.4th Sep 1924West Wittering \ L \ July1924-September1924  Scan52
Report page discussing battery construction, performance, and comparison to standard specifications.4th Sep 1924West Wittering \ L \ July1924-September1924  Scan53
Comparative trial of the Scintilla Magneto Type AG-6-A (Larger Type) against a smaller model.4th Sep 1924West Wittering \ L \ July1924-September1924  Scan54
Test report on a Scintilla magneto, detailing performance characteristics and its allocation to chassis 93-MX.4th Sep 1924West Wittering \ L \ July1924-September1924  Scan55
Front spring failure following an accident with a 48-PK car in France.2nd Sep 1924West Wittering \ L \ July1924-September1924  Scan56
Investigating issues with springs, sheaths, and braking performance after a component change.20th Sep 1924West Wittering \ L \ July1924-September1924  Scan57
Report concluding an investigation into a vehicle accident, attributing the cause to a broken centre bolt and not the 4-wheel brakes.30th Aug 1924West Wittering \ L \ July1924-September1924  Scan58
Accident report detailing a vehicle collision with a tree caused by a broken front spring centre bolt.30th Aug 1924West Wittering \ L \ July1924-September1924  Scan59
Fitting of a new spring centre bolt and the car's subsequent condition.27th Aug 1934West Wittering \ L \ July1924-September1924  Scan60
Diagram illustrating a broken centre bolt on a front spring assembly.27th Aug 1934West Wittering \ L \ July1924-September1924  Scan61
Experiments with three modified 20 HP dynamos featuring two coils per slot.25th Aug 1924West Wittering \ L \ July1924-September1924  Scan62
The bench and mileage testing of a dynamo, including a comparison with standard models.25th Aug 1924West Wittering \ L \ July1924-September1924  Scan63
Report page concluding observations on machine wear, recommending a feature be standardised.25th Aug 1924West Wittering \ L \ July1924-September1924  Scan64
The 10,000-mile performance of 'Eika' tungsten contact breaker points compared to standard platinum-iridium points.20th Aug 1924West Wittering \ L \ July1924-September1924  Scan65
The wear and performance of Eska Tungsten Points after 11,587 miles of use on chassis 7-GII.26th Jun 1924West Wittering \ L \ July1924-September1924  Scan66
Condition report on Seka Tungsten Points from chassis 3-GII.20th Aug 1924West Wittering \ L \ July1924-September1924  Scan67
Amount of nip and friction measured on road springs from a 46-PK car.1st Aug 1924West Wittering \ L \ July1924-September1924  Scan68
Specification tables for 9-leaf and 10-leaf springs, detailing space between leaves, thickness, and load data.9th Sep 1924West Wittering \ L \ July1924-September1924  Scan69
Graph and data table showing the results of a deflection test on an off-side road spring.9th Sep 1924West Wittering \ L \ July1924-September1924  Scan72
Graph and data table showing the results of a deflection test on a near side road spring.1st Aug 1934West Wittering \ L \ July1924-September1924  Scan73
Cover note for a report showing the torsion of deflection of front road springs.1st Aug 1934West Wittering \ L \ July1924-September1924  Scan74
Torsion and oscillation tests conducted on front road springs.20th Mar 1924West Wittering \ L \ July1924-September1924  Scan75
Data table on the torsional deflection of front road springs.20th Mar 1924West Wittering \ L \ July1924-September1924  Scan76
Data table comparing performance characteristics (Twist, Pull, Torque) for three spring types: Std. 40/50, No. 3, and No. 4.20th Mar 1924West Wittering \ L \ July1924-September1924  Scan77
Graph plotting the twist of different front springs under braking torque.16th Aug 1924West Wittering \ L \ July1924-September1924  Scan78
Capacity-temperature tests for 20 HP battery ignition condensers.16th Aug 1924West Wittering \ L \ July1924-September1924  Scan79
Construction and testing of different groups of condensers.16th Aug 1924West Wittering \ L \ July1924-September1924  Scan80
Examination of condenser performance, comparing the effects of temperature on capacity using paraffin wax and various varnishes as dielectrics.16th Aug 1924West Wittering \ L \ July1924-September1924  Scan81
Extract from Mr. Pignatt's laboratory report on condenser tests regarding the effect of paraffin wax.16th Aug 1924West Wittering \ L \ July1924-September1924  Scan82
Graph showing the variation of capacity with temperature for paper condensers.19th Nov 1924West Wittering \ L \ July1924-September1924  Scan83
Graph showing the variation of capacity with temperature for two types of paper condensers.15th Aug 1924West Wittering \ L \ July1924-September1924  Scan84
Two graphs showing the variation of capacity with temperature for five different types of paper condensers.19th Jul 1924West Wittering \ L \ July1924-September1924  Scan85
Graph showing the variation of capacity with temperature for two different types of paper condensers.19th Jul 1924West Wittering \ L \ July1924-September1924  Scan86
Telegram received concerning an accident with a 48-PK sales car in France.1st Aug 1924West Wittering \ L \ July1924-September1924  Scan87
The failure and dismantling of an Exide 6XR3/1 battery following a life test.14th Aug 1924West Wittering \ L \ July1924-September1924  Scan88
The failure and dismantling of a C.A.V. Willard 12ZR2/7 battery.13th Aug 1924West Wittering \ L \ July1924-September1924  Scan89
Progress report on a new radiator design, detailing matrix and tube dimensions and the shutter operating mechanism.25th Jul 1924West Wittering \ L \ July1924-September1924  Scan90
New scheme for the front axle control, showing the boss for the radius rods and required modifications.24th Jul 1924West Wittering \ L \ July1924-September1924  Scan91
Secret internal memorandum regarding the design and patenting of an automatic control oil servo system.24th Jul 1924West Wittering \ L \ July1924-September1924  Scan92
Design modifications for the Goshawk III 4-speed gearbox casing.1st Jul 1924West Wittering \ L \ July1924-September1924  Scan93
Manufacturing process for the 1st and 2nd speed striking fork for a Goshawk III 4-speed gearbox.23th Jul 1924West Wittering \ L \ July1924-September1924  Scan94
Secret memo discussing an alternative mounting method for steel artillery wheels.19th Jul 1924West Wittering \ L \ July1924-September1924  Scan95
Dispatch of drawings for an open-type engine undershield.18th Jul 1924West Wittering \ L \ July1924-September1924  Scan96
Challenges and potential solutions for standardizing scuttle isolation on the 20.HP. chassis.1st Jul 1924West Wittering \ L \ July1924-September1924  Scan97
Alterations to the Goshawk III starting handle drawing, LeC. 1902.18th Jul 1924West Wittering \ L \ July1924-September1924  Scan98
Secret memo regarding scheme 1824 for the front end of a car, discussing modifications and headlight controls.18th Jul 1924West Wittering \ L \ July1924-September1924  Scan99
New design for steel artillery wheels to fit Dunlop hubs.24th Jul 1924West Wittering \ L \ July1924-September1924  Scan100
Drawing No. Lec. 1901 concerning floating piston pins with spherical ends for E.A.C. II & Goshawk III pistons.1st Jul 1924West Wittering \ L \ July1924-September1924  Scan101
Secret memo sending drawings for lightweight air valves and proposing experimental tests on a carburetter.7th Jul 1924West Wittering \ L \ July1924-September1924  Scan102
Secret memo regarding N. scheme 1823, a design for a shoe-type servo.7th Jul 1924West Wittering \ L \ July1924-September1924  Scan103
Secret memo regarding modifications to pistons, connecting rods, and the Scintilla magneto.17th Jul 1924West Wittering \ L \ July1924-September1924  Scan104
Drawing and modifications for the Goshawk III carburetter with an exhaust heated throttle.17th Jul 1924West Wittering \ L \ July1924-September1924  Scan105
The failure analysis and condition of a P & R TBD7/7 battery.16th Jul 1924West Wittering \ L \ July1924-September1924  Scan106
Modifications and trial designs for steel artillery wheels, including a novel Michelin fixing and a Dunlop hub concept.1st Jul 1924West Wittering \ L \ July1924-September1924  Scan107
Comparison of ignition characteristics between a Scintilla magneto and a battery system, illustrated with a graph.14th Jul 1924West Wittering \ L \ July1924-September1924  Scan108
Secret memo discussing the fitting of radius rods to an EAC 3 chassis for parallel control as an experiment.14th Jul 1924West Wittering \ L \ July1924-September1924  Scan109
Underframe suspension, scuttle isolation, and shock absorbers for 20HP and 40/50 models.10th Jul 1924West Wittering \ L \ July1924-September1924  Scan111
Issues with a wheel carrier, carburettor control, exhaust note, and a universal joint.1st Jul 1924West Wittering \ L \ July1924-September1924  Scan112
Features and assembly of the Goshawk 3/4 speed gearbox with servo.1st Jul 1924West Wittering \ L \ July1924-September1924  Scan113
Orientation of sparking plugs on the Goshawk I engine.12th Jul 1924West Wittering \ L \ July1924-September1924  Scan115
Telegram from J. Royce giving instructions to test a suspension scheme using a single radius rod.9th Jul 1924West Wittering \ L \ July1924-September1924  Scan116
Modification to the Goshawk 11 carburettor controls and a spherical fitting.7th Jul 1924West Wittering \ L \ July1924-September1924  Scan118
Fitting of dipping head lights to 20 HP Goshawk cars.7th Jul 1924West Wittering \ L \ July1924-September1924  Scan119
Telegram requesting a Goshawk model with specific large dipping lamps and thick cable.14th Jul 1924West Wittering \ L \ July1924-September1924  Scan120
Secret memorandum with sketches, detailing the insulation method for tab connections on a starter motor's coil and teazer field windings.7th Mar 1924West Wittering \ L \ July1924-September1924  Scan121
From Mr. Royce suggesting the inclusion of a list of electrical conductors in the Goshawk instruction book.2nd Jul 1924West Wittering \ L \ July1924-September1924  Scan122
The improvement and redesign of Bendix and Bijur pinions.2nd Jul 1924West Wittering \ L \ July1924-September1924  Scan123
Secret memo regarding alterations for the addition of a throttle governor to the carburetter side of an engine.1st Jul 1924West Wittering \ L \ July1924-September1924  Scan124
Report discussing oil leakage from the Goshawk II rear propeller shaft joint damaging carpets and a suggested solution.1st Jul 1924West Wittering \ L \ July1924-September1924  Scan125
Graph showing the increase of Hispano steering leverage relative to the E.A.C. V series.10th Apr 1925West Wittering \ M \ 2April1925-June1925  Scan0
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