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
Issuing a standardisation sheet for the Marston matrix on the Long Type Phantom II chassis radiator.16th Nov 1933Box 16 \ 2  Scan082
Standardisation of the Marston Mark III Radiator Matrix.6th Nov 1933Box 16 \ 2  Scan083
Tests conducted to investigate and resolve water loss from a Phantom radiator.5th Mar 1934Box 16 \ 2  Scan084
Test report on modifying the radiator water flow on a Phantom model to prevent water loss.3rd May 1934Box 16 \ 2  Scan085
Investigation into a customer complaint of water loss from a Phantom II radiator, chassis 88-MS.20th Feb 1934Box 16 \ 2  Scan086
Diagram illustrating the fluid capacity levels of a radiator header tank.16th Mar 1934Box 16 \ 2  Scan087
Graph showing the effect of a pipe restriction on water flow and temperature rise across a Phantom unit engine.16th Mar 1934Box 16 \ 2  Scan088
Cover page with a company date stamp.3rd May 1934Box 16 \ 2  Scan089
Blueprint detailing a modification to a delivery bend for a water pump.3rd May 1934Box 16 \ 2  Scan090
Blueprint detailing a modification to a water pump delivery bend for a 40/50 P.HP engine.3rd May 1934Box 16 \ 2  Scan091
Standardisation of an outlet pipe from the water pump with a reduced bore.1st May 1934Box 16 \ 2  Scan092
Proposal for standardizing a water pump pipe with a reduced bore for the 'T' series chassis, including estimated costs.16th May 1934Box 16 \ 2  Scan093
Analysis of the effect of altitude on the 'air temperature to boil' radiator figure.24th Sep 1936Box 16 \ 2  Scan094
Page from a report detailing formulas for calculating boiling points at various altitudes.24th Sep 1936Box 16 \ 2  Scan095
Graph showing the variation of boiling point, air temperature, and relative air density with altitude.24th Sep 1934Box 16 \ 2  Scan096
Blank backing sheet stamped by the Print Room in Derby.24th Sep 1934Box 16 \ 2  Scan097
Graph showing the sea level air temperatures required for boiling to occur at various altitudes.24th Sep 1934Box 16 \ 2  Scan098
Graph showing the variation of air temperature to boil and radiator figure with altitude.24th Sep 1934Box 16 \ 2  Scan099
The reverse of a document showing a Print Room date stamp.24th Sep 1934Box 16 \ 2  Scan100
The capacities of various car cooling systems.26th Sep 1934Box 16 \ 2  Scan101
From Bombay concerning corrosion of aluminium parts on the Phantom II model due to chlorinated water.12th Dec 1934Box 16 \ 2  Scan102
Letter concerning the corrosion of aluminium water connections on the Phantom II model, advising on replacements.28th Dec 1934Box 16 \ 2  Scan103
Rust caused by radiator overflow on a Phantom II, suggesting a flexible pipe to drain water away from the chassis.1st Feb 1935Box 16 \ 2  Scan104
Modification notice for chassis RE 12.EX, regarding increased damping on the servo balance links.23th Jun 1926Box 16 \ 3  Scan001
Requesting the results of experiments with a steel spring in the servo operating gear for the Phantom and 20 HP models.1st Aug 1926Box 16 \ 3  Scan002
Modifications to the servo stop and brake linkage system, including the balancing lever and suspension links.1st Aug 1926Box 16 \ 3  Scan003
Modifications to the Phantom Servo Brake Gear to prevent a pin fouling the suspension link.27th Aug 1926Box 16 \ 3  Scan004
Modifications to the servo linkage, specifically the hand brake lever spring and a lubricator boss.1st Oct 1926Box 16 \ 3  Scan005
Standardisation report on increasing the friction area of servo balance links for damping.22th Sep 1926Box 16 \ 3  Scan006
Proposed modifications to the servo brake mechanism to reduce front braking power.1st Dec 1926Box 16 \ 3  Scan007
Resolving 'servo jaggers' with spring dampers and recommending the standardization of this solution.22th Dec 1926Box 16 \ 3  Scan008
Standardisation sheet discussing an alteration from rubber to flat steel springs to improve flexibility in the servo shaft.18th Jan 1927Box 16 \ 3  Scan009
Unsatisfactory friction arrangement on the EAC.VII servo linkage due to an underperforming spring.24th Feb 1927Box 16 \ 3  Scan010
Friction calculations and spring specifications for the EAC.7 servo linkage.17th Mar 1927Box 16 \ 3  Scan011
Technical memo discussing a discrepancy in load measurements on an EAC.7 servo linkage, complete with a diagram.21th Mar 1927Box 16 \ 3  Scan012
Complaint regarding the friction head in the servo linkage and a proposed new spring.7th Apr 1927Box 16 \ 3  Scan013
Manufacturing feasibility and specifications for a servo worm gear assembly.23th Nov 1927Box 16 \ 3  Scan014
Design and sourcing of worm gears for an integral gearbox servo.24th Nov 1927Box 16 \ 3  Scan015
Torque calculations and specifications for the EAC.10 servo gears.13th Dec 1927Box 16 \ 3  Scan016
Calculation sheet for the torque required on 40/50 servo gears, including leverage diagrams.14th Dec 1927Box 16 \ 3  Scan017
General arrangement for the EAC.10 servo, noting a smaller diameter than the Phantom and proposing a Ferodo lining.31th Jan 1928Box 16 \ 3  Scan018
Use of a Bostock & Bramley worm gear for the servo system to handle heavy loads.2nd Feb 1928Box 16 \ 3  Scan019
The production of servo worm gear blanks and a supplier's proposed design change.13th Feb 1928Box 16 \ 3  Scan020
Dispatch of drawing N.sch.2539, which details the arrangement of brake differentials and their servo connection.13th Feb 1928Box 16 \ 3  Scan021
Request to issue a Standardisation Sheet for modified servo gears with a larger pinion on the 40/50 HP chassis.12th Jul 1928Box 16 \ 3  Scan022
Trouble with 40/50 HP Chassis Servo Gears and a recommendation to delay standardization.25th Jul 1928Box 16 \ 3  Scan023
Internal request for a drawing of the brake servo drive from the transmission shaft and details on its gear reductions.1st Dec 1928Box 16 \ 3  Scan024
Modifications for 'SS' brakes to be fitted to chassis 19-EX.13th Dec 1928Box 16 \ 3  Scan025
Instruction to experimentally modify the 'SS' chassis brakes by changing the servo cams and increasing the length of lever G.76811.17th Dec 1928Box 16 \ 3  Scan026
Query to confirm the correct angle for the Phantom servo operating cams, discussing a 55 degree versus a 45 degree angle.18th Dec 1928Box 16 \ 3  Scan027
Technical memorandum discussing the performance and issues with 'SS' brakes and servo mechanisms.12th Dec 1928Box 16 \ 3  Scan028
Comparative analysis of two servo designs ('40/50' and 'S S') using calculations for braking forces and wheel skid characteristics.12th Dec 1928Box 16 \ 3  Scan029
Braking performance, servo equality, chassis weight reduction, and lever modifications.12th Dec 1928Box 16 \ 3  Scan030
Calculations and analysis of servo efficiency and cam angles.21th Dec 1928Box 16 \ 3  Scan031
Servo cam angles, coefficients of friction, and load loss for the Phantom and 20 HP models.21th Dec 1928Box 16 \ 3  Scan032
Cam angle for the 'SS' servo and brakes on the Phantom chassis.22th Dec 1928Box 16 \ 3  Scan033
Technical memo detailing the results of bench and road tests on the 'SS' servo leverage.2nd Jan 1929Box 16 \ 3  Scan034
Continued discussion on direct braking, servo torque multiplication, and brake distribution.2nd Jan 1929Box 16 \ 3  Scan035
Performance comparison graph between a Super-Sports servo and a standard Phantom servo.11th Jan 1929Box 16 \ 3  Scan036
Heavily faded typewritten document with a purple 'Print Room' stamp in the bottom right corner.11th Jan 1929Box 16 \ 3  Scan037
Investigation into the angle of servo cams and lever length for the 'SS' brake gear.27th Jan 1929Box 16 \ 3  Scan038
Suggestion (N.sch. 2816) to prevent servo driven plate pins from seizing up.1st Feb 1929Box 16 \ 3  Scan039
Oil conveyance for the 'SS' servo mechanism and adjustments to the countershaft lever.14th Feb 1929Box 16 \ 3  Scan040
Production of the 'SS' servo and brake mechanism, particularly concerning the servo linings.13th Mar 1929Box 16 \ 3  Scan041
Testing fabric for the servo due to slight heating concerns on long hills.26th Mar 1929Box 16 \ 3  Scan042
Historical outline and test results for the braking system on S.S. cars.19th Apr 1929Box 16 \ 3  Scan043
Investigation into brake sponginess and servo performance on the S.S. model compared to the Phantom.19th Apr 1929Box 16 \ 3  Scan044
Tests and modifications to improve brake linkage efficiency and operation.19th Apr 1929Box 16 \ 3  Scan045
Reverting to original direct rear braking to balance front and rear linkage efficiency.10th Apr 1928Box 16 \ 3  Scan046
Efficiency calculations and data for the 'SS' brake linkage system.10th Apr 1928Box 16 \ 3  Scan047
Confirming instructions to fit up the 21-EX car with original W.W. leverage and 45° cams in the servo.4th Apr 1929Box 16 \ 3  Scan048
Confirming the desirability of altering car leverage to prevent squeaking front brakes.17th May 1929Box 16 \ 3  Scan049
Instructions for alterations to the servomechanism on the 40/50 HP chassis for all SS production cars.25th May 1929Box 16 \ 3  Scan050
Confirmation to slightly reduce the outside diameter of the woven cotton servo lining to prevent squeaking.28th May 1929Box 16 \ 3  Scan051
Inconsistent servo action and a new woven cotton disc servo lining.29th May 1929Box 16 \ 3  Scan052
Technical memorandum discussing brake lining wear, performance, and alternative cam configurations.29th May 1929Box 16 \ 3  Scan053
Squeaking brakes, comparing the performance of Johns-Manville and Ferobestos brake linings.29th May 1929Box 16 \ 3  Scan054
The results of a 10,000-mile test on lubricated cotton duck linings for the 'SS' servo.29th May 1929Box 16 \ 3  Scan055
Responding to an earlier memo, detailing modifications to S.S. cars regarding springs, servo lining, thermostat, and exhaust fittings.26th Jul 1929Box 16 \ 3  Scan056
Modifications to steering and damper components on S.S. cars to prevent clicking and improve lubrication.13th Aug 1929Box 16 \ 3  Scan057
Clarifying the use of cotton duck fabric linings for the S.S. Chassis Servo Motor Mechanism.13th Aug 1929Box 16 \ 3  Scan058
Letter from the American branch to Derby discussing a 'Brake Clank' issue and proposed solutions.19th Aug 1929Box 16 \ 3  Scan059
Technical explanation of the operation and silent release mechanism for a servo brake system.19th Aug 1929Box 16 \ 3  Scan060
Letter from Maurice Olley of Rolls Royce of America, Inc. discussing issues and solutions for front brake adjustment and layout.17th Sep 1929Box 16 \ 3  Scan061
Testing of a method to avoid brake clanks, noting initial results were not entirely successful.17th Sep 1929Box 16 \ 3  Scan062
Tests carried out to eliminate servo brake clanks, in response to a letter from Mr. Olley.18th Sep 1929Box 16 \ 3  Scan063
The performance and issues of a servo braking system linkage and its on-road testing.18th Sep 1929Box 16 \ 3  Scan064
Testing two schemes, a pneumatic damper and friction plates, to overcome clanking in a braking system.18th Sep 1929Box 16 \ 3  Scan065
On reducing brake friction loads and adding rubber stops to quieten the brake release.19th Aug 1929Box 16 \ 3  Scan066
Blueprint diagram illustrating a servo action mechanism.19th Aug 1929Box 16 \ 3  Scan067
Drawing illustrating experiments and a proposal to cure a 'clank' in the servo brake system.12th Jul 1919Box 16 \ 3  Scan068
Testing different servo lining materials, including Halo and cotton duck fabric, to improve brake servo efficiency.21th Sep 1929Box 16 \ 3  Scan069
Tests and recommendations for improving servo efficiency and brake operation consistency through various modifications.24th Jun 1929Box 16 \ 3  Scan070
Graph comparing the consistency of performance between dry and oil-soaked servo fabric.24th Jun 1929Box 16 \ 3  Scan071
Blank page with a rectangular date stamp in purple ink.25th Jun 1929Box 16 \ 3  Scan072
Graph showing servo efficiency curves for various material and mechanical configurations.20th Jun 1929Box 16 \ 3  Scan073
Blank page with a Print Room date stamp.20th Jun 1929Box 16 \ 3  Scan074
Customer complaints about clanking noises from the brake mechanism and proposed solutions.8th Oct 1929Box 16 \ 3  Scan075
Resolving brake arm and noise issues by fitting a cushioned stop and considering a dash pot solution.2nd Oct 1929Box 16 \ 3  Scan076
Tests carried out on a buffer stop for a servo balance lever to reduce clanking noises.2nd Oct 1929Box 16 \ 3  Scan077


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