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 life of parts during bumping tests for spring bolts.30th Apr 1914Box 119 \ 2  scan0025
Test results table for spring bolts detailing time to failure and associated references.30th Apr 1914Box 119 \ 2  scan0026
Average life before breaking for front spring centre bolts.27th May 1914Box 119 \ 2  scan0027
Life of steering levers during bumping tests.27th May 1914Box 119 \ 2  scan0028
Log sheet detailing test results for various steering levers.27th May 1914Box 119 \ 2  scan0029
Table showing the average life before breakage for various steering levers.28th May 1914Box 119 \ 2  scan0030
Life of parts on bumping tests for steering levers.28th May 1914Box 119 \ 2  scan0031
Test report sheet detailing the lifespan results for steering levers before breakage.28th May 1914Box 119 \ 2  scan0032
The life of steering levers during bumping tests.28th May 1914Box 119 \ 2  scan0033
Bumping test report on the life of steering tubes.30th Apr 1914Box 119 \ 2  scan0034
Test report detailing the average life before breaking for a side steering tube.1st May 1914Box 119 \ 2  scan0035
Life of parts on bumping tests for buffer springs.1st May 1914Box 119 \ 2  scan0036
Test log sheet detailing the lifespan and breakage results for buffer springs.1st May 1914Box 119 \ 2  scan0037
Results of bumping tests on axle tubes.29th Apr 1914Box 119 \ 2  scan0038
Results of bumping tests on front axle pivots.29th Apr 1914Box 119 \ 2  scan0039
Test report on the durability and average life of different front axle pivots.1st May 1914Box 119 \ 2  scan0040
Test report on the life of frame parts subjected to bumping tests.1st May 1914Box 119 \ 2  scan0041
The average life of frames before breakage.1st May 1914Box 119 \ 2  scan0042
Bumping tests to determine the life of a bracket of a frame truss.1st May 1914Box 119 \ 2  scan0043
The life of Dumb Irons during bumping tests.4th May 1914Box 119 \ 2  scan0044
Bumping tests for bolts and rivets in dumb iron.5th May 1914Box 119 \ 2  scan0045
Test results showing average life before breakage for various bolts and rivets in Dumb Iron.5th May 1914Box 119 \ 2  scan0046
Time study sheet for installing bolts and rivets.30th Apr 1914Box 119 \ 2  scan0047
Results of bumping tests on various cross members.30th Apr 1914Box 119 \ 2  scan0048
The life of an engine part during bumping tests.30th Apr 1914Box 119 \ 2  scan0049
Bumping test report on a radiator's suspension bracket.30th Apr 1914Box 119 \ 2  scan0050
Results of a bumping test on a torque tube.30th Apr 1914Box 119 \ 2  scan0051
The life of front axle parts during bumping tests.29th Apr 1914Box 119 \ 2  scan0052
Test results and average life before cracking for front axles.28th May 1914Box 119 \ 2  scan0053
The life of steering levers during bumping tests.28th May 1914Box 119 \ 2  scan0054
Analysis of parts that have broken during bumping tests.3rd Jun 1914Box 119 \ 2  scan0055
Analysis of bumping tests showing the average life of various parts.9th Jun 1914Box 119 \ 2  scan0056
List of parts with their corresponding labor time in hours and minutes.9th Jun 1914Box 119 \ 2  scan0057
Time log listing parts and the hours and minutes associated with them.10th Jun 1914Box 119 \ 2  scan0058
Analysis of bumping tests showing the average life of parts, comparing redesigned stronger parts with earlier designs.10th Jun 1914Box 119 \ 2  scan0059
Log detailing the results of stress and endurance tests on various automotive components.11th Jun 1914Box 119 \ 2  scan0060
Test results for bearing pins bolted through hangers and various front spring top plates.13th Feb 1914Box 119 \ 2  scan0061
Log of test results for radiator, front springs, steering gear, shock absorbers, and frame components.5th Oct 1914Box 119 \ 2  scan0062
Log sheet detailing the results of stress and durability tests on various vehicle components.15th Oct 1914Box 119 \ 2  scan0063
Test log sheet detailing the performance and failure of radiator components, steering levers, and suspension brackets.29th Oct 1914Box 119 \ 2  scan0064
Log detailing the results of stress and endurance tests on various automotive components like radiator brackets, rear axles, and radiators.12th Nov 1910Box 119 \ 2  scan0065
Safety concerns regarding steering components following bumping tests.29th Jun 1914Box 119 \ 2  scan0066
Fatigue tests, comparing the value of 2-inch and 3-inch bumps, particularly concerning radiators.22th Jul 1914Box 119 \ 2  scan0067
Log sheet of endurance and leak tests for various radiator designs and suspension methods.8th Aug 1910Box 119 \ 2  scan0068
Need for a bumping rig for chassis testing and its design considerations.19th Dec 1918Box 119 \ 2  scan0069
Cover note regarding a bumping rig with remarks from C.J.1st Jan 1918Box 119 \ 2  scan0070
Tabulated analysis of bumping tests.4th Jan 1917Box 119 \ 2  scan0071
Steering gear fracture during a chassis bumping rig test, including material analysis and recommendations.11th Aug 1919Box 119 \ 2  scan0072
Analysis report on a fractured road spring, detailing its chemical composition and hardness.11th Aug 1919Box 119 \ 2  scan0073
Instruction sheet detailing component failures found during a bumping test.12th Aug 1919Box 119 \ 2  scan0074
Instruction sheet listing faults discovered during a jolting chassis bumping test.13th Aug 1919Box 119 \ 2  scan0075
Setup and results of a 40/50 chassis bumping test, comparing it to pre-war methods.18th Aug 1919Box 119 \ 2  scan0076
Test failure log sheet listing various component failures, time to failure, and corresponding remarks.10th Oct 1919Box 119 \ 2  scan0077
New and experimental parts fitted to Bumper Chassis X.1831.10th Oct 1919Box 119 \ 2  scan0078
The failure of the 40/50 radiator suspension during bumping tests, with recommended modifications.10th Oct 1919Box 119 \ 2  scan0079
Bump tests for the 40/50 chassis, detailing the performance of new wheels, shock absorbers, and a radiator.27th Nov 1919Box 119 \ 2  scan0080
Component failures, specifically a side member and steering rocking lever, during a severe bump test.16th Apr 1919Box 119 \ 2  scan0081
Log of component failures from a bumping test running at 105 bumps per minute.27th Nov 1919Box 119 \ 2  scan0082
Laboratory analysis of a fractured steering rocking shaft and a car frame part.16th Apr 1919Box 119 \ 2  scan0083
Failure analysis report concluding that cracks originated from drill holes due to a low yield point and repeated bending stress.25th Nov 1919Box 119 \ 2  scan0084
Instruction sheet for repair work on a vehicle chassis, listing parts and labor time.11th Dec 1919Box 119 \ 2  scan0085
Instruction sheet detailing failures from a bumping test and required repairs.13th Mar 1918Box 119 \ 2  scan0086
Issues with rear shock absorbers, including bolt stretching and loose levers on a bumping rig and an EX Car.2nd Feb 1920Box 119 \ 2  scan0087
Rear shock absorber friction and the option of abandoning split springs.2nd Feb 1920Box 119 \ 2  scan0088
Split rear spring failure on a bumping rig and subsequent investigation into squeaking issues.13th Feb 1920Box 119 \ 2  scan0089
Testing chassis stability and the effect of greasing springs on rolling and swaying.13th Feb 1920Box 119 \ 2  scan0090
Failure of three split rear springs during testing on a bumping rig.16th Feb 1920Box 119 \ 2  scan0091
Modifications to split leaf springs by fitting clips to prevent breakages.16th Feb 1920Box 119 \ 2  scan0092
Failures of thick leaf rear springs following a telegram about a broken spring in Spain.16th Mar 1920Box 119 \ 2  scan0093
Bumping test results for rear springs and shock absorbers.16th Mar 1920Box 119 \ 2  scan0094
Test report detailing rear spring failures during a bump test.16th Mar 1920Box 119 \ 2  scan0095
Bump rig tests of split rear springs with fitted extra clips to determine if their operational life could be increased.12th Apr 1920Box 119 \ 2  scan0096
The unreliability of present rear springs compared to older models, with a recommendation to revert to the old type.12th Apr 1920Box 119 \ 2  scan0097
Test log sheet detailing failures and repairs during a front bumper test.30th Apr 1920Box 119 \ 2  scan0098
Log sheet detailing a bumper test on a chassis, recording hours run and remarks on component failures.28th May 1920Box 119 \ 2  scan0099
Bump rig testing of new road springs from Messrs. Woodhead, focusing on performance and eliminating leaf squeak.21th May 1920Box 119 \ 2  scan0100
Log sheet recording observations and run times for a chassis jumper test.2nd Jun 1920Box 119 \ 2  scan0101
Log sheet detailing results from a rear axle bumper test, recording component failures and replacements over several test cycles.31th May 1920Box 119 \ 2  scan0102
Report comparing bumping rig tests on two different designs of rear leaf springs.10th Jun 1920Box 119 \ 2  scan0103
Continued report page discussing stress on plates which break in turn.1st Jun 1920Box 119 \ 2  scan0104
Results from a rear axle bumper test and subsequent Brinell tests on various springs.14th Jun 1920Box 119 \ 2  scan0105
Log sheet detailing failures observed during a bumper test on the rear of a chassis.21th Jun 1920Box 119 \ 2  scan0106
Bump rig testing of chassis rear springs, detailing multiple leaf failures and future actions.16th Jun 1920Box 119 \ 2  scan0107
Log detailing the results and faults found during a bumper test on the rear of a chassis.25th Jun 1920Box 119 \ 2  scan0108
Test log for a rear axle on a bumper test, detailing component failures and modifications over a series of tests.28th Apr 1920Box 119 \ 2  scan0109
Test results for a rear axle on a bumper test, including spring failure analysis and Brinell hardness tests.14th Jun 1920Box 119 \ 2  scan0110
Continued Brinell hardness test results for various spring leaves.22th Jun 1927Box 119 \ 2  scan0111
The testing of chassis springs without nibs and slots.23th Jun 1920Box 119 \ 2  scan0112
Brinell hardness tests conducted on various chassis springs.23th Jun 1920Box 119 \ 2  scan0113
Brinell hardness test results for chassis spring leaves, noting failures and hours run.28th Jun 1920Box 119 \ 2  scan0114
Chassis failures during a bump test after switching from split springs to solid leaf springs.28th Jun 1920Box 119 \ 2  scan0115
Bumper test, failures observed over time, and subsequent Brinell hardness tests on a broken spring.24th Jun 1920Box 119 \ 2  scan0116
Test log for rear bumper springs detailing failures over time and subsequent hardness testing.24th Jul 1920Box 119 \ 2  scan0117
Test report for a spring, detailing results from a Brinell hardness test on individual leaves.7th Aug 1920Box 119 \ 2  scan0118
Test log sheet detailing failures and repairs of springs and shock absorbers under the title 'Bumper Test'.7th Aug 1920Box 119 \ 2  scan0119
Test report on a leaf spring, detailing specifications, Brinell hardness, and damage remarks for each leaf.30th Jul 1920Box 119 \ 2  scan0120
Test report for a 6-leaf spring, detailing failures, hardness, and run times.2nd Aug 1920Box 119 \ 2  scan0121
Test report for two leaf springs, detailing specifications, installation, and failure analysis.7th Aug 1920Box 119 \ 2  scan0122
Test report on a 9-leaf spring detailing failures after a 42.5-hour run.19th Aug 1920Box 119 \ 2  scan0123
Test report on a nine-leaf parallel spring, detailing Brinell hardness and damage after a time run.18th Aug 1920Box 119 \ 2  scan0124


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