| Description | Date | Identifier | |
| High-speed over-running rattles, flywheel dynamics, and potential solutions involving coupling elasticity. | 19th Nov 1911 | Box 25 \ 3 Scan029 | |
| Methods to reduce faults by increasing frame rigidity, improving clutch couplings, and testing shaft alignment. | 14th Oct 1911 | Box 25 \ 3 Scan030 | |
| Guide illustrating the test for parallelism and concentricity of gearbox shafts. | 14th Oct 1911 | Box 25 \ 3 Scan031 | |
| Page detailing suggestions for improving a vehicle's coupling and frame alignment. | 9th Dec 1911 | Box 25 \ 3 Scan032 | |
| Investigation into rattles from the flexible steering drive. | 9th Dec 1911 | Box 25 \ 3 Scan033 | |
| Test results for car and engine speeds with different silencer configurations. | 15th Jul 1912 | Box 25 \ 3 Scan034 | |
| Flywheel, magneto, and engine coupling rattles on an engine test plate. | 15th Jul 1912 | Box 25 \ 3 Scan035 | |
| From the 99th Meeting regarding fixing 'Coronation rattles' by a method other than making the flywheel heavier. | 20th Dec 1911 | Box 25 \ 3 Scan036 | |
| From Mr. Royce discussing engine vibration improvements by reducing compression and trying a 'Mea' magneto. | 21th Jan 1912 | Box 25 \ 3 Scan037 | |
| To the Technical Committee regarding the cause and experimental analysis of 'Coronation Vibrations' in cars. | 31th Jan 1912 | Box 25 \ 3 Scan038 | |
| With diagrams discussing the causes of speed variation and proposals to minimize it. | 31th Jan 1912 | Box 25 \ 3 Scan039 | |
| 'Coronation Rattles' and 'Transmission vibrations', attributing the cause to an asymmetrically balanced brake drum and proposing a solution. | 31th Jan 1912 | Box 25 \ 3 Scan040 | |
| Proposals and a sketch for a spring coupling with friction to prevent oscillation in the drive system. | 21th Feb 1912 | Box 25 \ 3 Scan041 | |
| 'Coronation Vibrations' and the design of damping rings, a brake drum, and a combined spring/friction coupling. | 21th Feb 1912 | Box 25 \ 3 Scan042 | |
| Correcting out-of-balance masses and the effects of running-balance, detailing an experiment with a brake drum. | 25th Feb 1912 | Box 25 \ 3 Scan043 | |
| Balancing factors and experiments, including a handwritten note and sketch. | 25th Feb 1912 | Box 25 \ 3 Scan044 | |
| Torsional vibration, balance, and unevenness in components. | 21th Feb 1912 | Box 25 \ 3 Scan045 | |
| Engine vibrations, magneto performance, and a preference for smoothness over power. | 21th Feb 1912 | Box 25 \ 3 Scan046 | |
| Engine-gearbox alignment, piston design, and a proposed test rig for engine vibrations. | 21th Feb 1912 | Box 25 \ 3 Scan047 | |
| Engine vibration, a novel piston design, and a throttle valve alteration to stop silencer explosions. | 22th Apr 1912 | Box 25 \ 3 Scan048 | |
| Note from Mr. Royce regarding engine vibrations, compression reduction, and the quality of a Men magneto. | 22th Apr 1912 | Box 25 \ 3 Scan049 | |
| Note detailing Mr Royce's opinions on the potential causes of 'Coronation Vibrations' in engines. | 22th Apr 1912 | Box 25 \ 3 Scan050 | |
| For the Technical Committee regarding Mr. Royce's opinion on Coronation Vibrations and brake drum symmetry. | 24th Apr 1912 | Box 25 \ 3 Scan051 | |
| List of engine speeds where crankshaft vibrations occur on a 2100 series engine without a slipper flywheel. | 11th Jan 1913 | Box 25 \ 3 Scan052 | |
| To Mr Johnson discussing investigations into engine vibration in Mr Northey's car. | 21th Jan 1913 | Box 25 \ 3 Scan053 | |
| Report page discussing an investigation into engine vibration caused by crankshaft torque. | 2nd Feb 1914 | Box 25 \ 3 Scan054 | |
| Engine vibration issues in relation to frame stiffening. | 2nd Feb 1914 | Box 25 \ 3 Scan055 | |
| Engine performance, detailing issues with plugs, timing, noise, and the clutch, with a comparison to a Mercedes engine. | 22th Jul 1914 | Box 25 \ 3 Scan056 | |
| Report from Mr Hives recommending the use of a lightened crankshaft with aluminium oil plugs. | 22th Jul 1914 | Box 25 \ 3 Scan057 | |
| Urgent request for a stethoscope, used for detecting vibrations, required for experiments on the 'Eagle' engine. | 22th Sep 1916 | Box 25 \ 3 Scan058 | |
| Investigation into chassis vibrations, distinguishing between those caused by engine pulsations versus road shocks. | 29th Oct 1919 | Box 25 \ 3 Scan059 | |
| Letter discussing a vibration issue on a low compression chassis at specific speeds. | 6th Aug 1920 | Box 25 \ 3 Scan060 | |
| 40/50 engine vibrations and the difficulty of introducing flexible mountings while maintaining gearbox alignment. | 6th Aug 1920 | Box 25 \ 3 Scan061 | |
| Investigating and rectifying excessive vibration in Mr. Johnson's coupe. | 21th Feb 1921 | Box 25 \ 3 Scan062 | |
| Engine misfiring, pre-ignition issues, and the adoption of new 'Mercury' ignition plugs. | 1st Feb 1921 | Box 25 \ 3 Scan063 | |
| Cause of vibrations in Mr. Johnson's Coupe chassis, 10-LW. | 8th Mar 1921 | Box 25 \ 3 Scan064 | |
| Advising against the use of abrasives in engines and detailing cleaning procedures. | 8th Mar 1921 | Box 25 \ 3 Scan065 | |
| Engine bearing wear, its causes like abrasives, the role of clean oil, and the limitations of oil filtration. | 18th Mar 1921 | Box 25 \ 3 Scan066 | |
| Analysis of metal particles found in engine sludge to determine their origin and cause. | 18th Mar 1921 | Box 25 \ 3 Scan067 | |
| Response to an inquiry about a 'Trepidographe' device for testing chassis springs, stating no information is available. | 8th Jul 1921 | Box 25 \ 3 Scan068 | |
| Cause of engine vibration on the 40/50 chassis and a proposed solution. | 14th Mar 1922 | Box 25 \ 3 Scan069 | |
| Ongoing issue of engine and chassis vibration in the 40/50 model. | 23th Mar 1922 | Box 25 \ 3 Scan070 | |
| Excessive vibration issues with chassis 81-TW. | 22th Mar 1922 | Box 25 \ 3 Scan071 | |
| Investigation and resolution of engine pulsation and vibration issues. | 28th Apr 1922 | Box 25 \ 3 Scan072 | |
| Proposal to experimentally test engine 81-TW to investigate crankshaft end-thrust as a cause of undesirable vibrations. | 28th Apr 1922 | Box 25 \ 3 Scan073 | |
| Requesting an update on the scheduled tests for the 40/50 HP cars at Brooklands Track. | 20th Jun 1922 | Box 25 \ 3 Scan074 | |
| Directive to cease the development and sale of high compression cars to preserve the brand's reputation for smoothness and silence. | 14th Jul 1922 | Box 25 \ 3 Scan075 | |
| Stressing that quality and testing standards must not be compromised by delivery pressures from the sales department. | 14th Jul 1922 | Box 25 \ 3 Scan076 | |
| Investigating vibration complaints on a 40/50 chassis, specifically car 107-MG. | 19th Jul 1922 | Box 25 \ 3 Scan077 | |
| Engine vibration investigations and maintenance work performed on two vehicles at Cricklewood. | 19th Jul 1922 | Box 25 \ 3 Scan078 | |
| Typed report discussing engine vibration issues, remedies, and opinions on high-compression car models. | 19th Jul 1922 | Box 25 \ 3 Scan079 | |
| Vehicle vibration, comparing pre-war and post-war cars, and investigating causes like fan and dynamo belts. | 19th Jul 1922 | Box 25 \ 3 Scan080 | |
| Chassis vibration issues, discussing past remedies and proposed future tests. | 20th Jul 1922 | Box 25 \ 3 Scan081 | |
| Complaints of vibrations on the 40/50 chassis, focusing on compression levels and belts as potential causes. | 20th Jul 1922 | Box 25 \ 3 Scan082 | |
| Testing of 14-tooth axles and compression ratios on 40/50 cars. | 20th Jul 1922 | Box 25 \ 3 Scan083 | |
| Torque re-action vibration issues in the 40/50 car, comparing it with other vehicles and considering suspension solutions. | 20th Jul 1922 | Box 25 \ 3 Scan084 | |
| Goshawk engine mounting to reduce re-action vibration and modifying the 40/50 suspension policy. | 21th Sep 1922 | Box 25 \ 3 Scan085 | |
| Tests to eliminate engine pulsations on a 4-Goshawk-11 model by using rubber pads and disconnecting the steering support tube. | 21th Sep 1922 | Box 25 \ 3 Scan086 | |
| Modifications to car 107-MG to resolve vibration complaints on the 40/50 chassis. | 21th Jul 1922 | Box 25 \ 3 Scan087 | |
| Complaints of vibration from the 40/50 chassis, comparing open and closed car models and the effects of compression and axle ratios. | 22th Jul 1922 | Box 25 \ 3 Scan088 | |
| The suitability of the 14-tooth axle versus the 18-tooth axle, and a decision on despatching cars with improved fan belts. | 1st Jul 1922 | Box 25 \ 3 Scan089 | |
| Requesting an investigation into the harshness and vibration at the front of the 40/50 model. | 1st Jul 1922 | Box 25 \ 3 Scan090 | |
| Vibration complaints on the 40/50 chassis, specifically concerning axle ratios, engine compression for closed cars, and fan belts. | 24th Jul 1922 | Box 25 \ 3 Scan091 | |
| Inquiring about the results of tests on 14-tooth axles, compression, and vibration at Brooklands. | 8th Aug 1922 | Box 25 \ 3 Scan092 | |
| Vibrations on the 40/50 model at 20 M.P.H. | 2nd Oct 1922 | Box 25 \ 3 Scan093 | |
| Following a production engineers' visit discussing issues with body vibrations and material choices for the Goshawk chassis. | 19th Jan 1923 | Box 25 \ 3 Scan094 | |
| Method of attaching the dashboard to the scuttle and comparing it to a competitor's design. | 12th Apr 1923 | Box 25 \ 3 Scan095 | |
| Inquiry to Messrs. Elliott Bros. regarding instruments for measuring the intensity of vibrations on a car engine. | 12th Apr 1923 | Box 25 \ 3 Scan096 | |
| Letter of inquiry to Cambridge & Paul Instr: Co. regarding an instrument for measuring vibrations in a car engine. | 12th Apr 1923 | Box 25 \ 3 Scan097 | |
| Letter from Elliott Brothers (London) Ltd. stating they do not make instruments for measuring vibrations. | 14th Apr 1923 | Box 25 \ 3 Scan098 | |
| Letter from The Cambridge and Paul Instrument Company describing a newly developed vibration recorder. | 16th Apr 1923 | Box 25 \ 3 Scan099 | |
| Continuation of a letter from The Cambridge and Paul Instrument Company regarding vibration records and instrument pricing. | 16th Apr 1923 | Box 25 \ 3 Scan100 | |
| Photograph of a Dobbie McInnes mechanical indicator or testing apparatus. | 16th Apr 1923 | Box 25 \ 3 Scan101 | |
| Two negative prints of oscillograph traces comparing different levels of vibration. | 16th Apr 1923 | Box 25 \ 3 Scan102 | |
| Vibrograph film recordings showing vibration patterns. | 18th May 1923 | Box 25 \ 3 Scan103 | |
| Letter inquiring about the practical applications and capabilities of a vibration recorder for internal combustion engines. | 18th May 1923 | Box 25 \ 3 Scan104 | |
| The second page of a letter discussing a demonstration of performance. | 6th Jul 1923 | Box 25 \ 3 Scan105 | |
| Test report on methods for damping camshaft vibrations by modifying the engine suspension. | 6th Jul 1923 | Box 25 \ 3 Scan106 | |
| Road test results for crankshaft vibrations on a 49-GB car. | 6th Jul 1923 | Box 25 \ 3 Scan107 | |
| Letter from The Cambridge and Paul Instrument Company regarding sending a representative with a Vibrograph to test a gearbox. | 8th Jan 1924 | Box 25 \ 3 Scan108 | |
| Letter from The Cambridge and Paul Instrument Company regarding a misdirected letter. | 10th Jan 1924 | Box 25 \ 3 Scan109 | |
| Letter to Cambridge & Paul Instrument Co. Ltd. regarding a misdirected letter found in their envelope. | 9th Jan 1924 | Box 25 \ 3 Scan110 | |
| Confirming a visit from a Cambridge & Paul Instrument Company representative for a gearbox trial. | 11th Jan 1924 | Box 25 \ 3 Scan111 | |
| Letter from The Cambridge and Paul Instrument Company regarding a visit with a Vibrograph to test a gearbox. | 8th Jan 1924 | Box 25 \ 3 Scan112 | |
| Visit of representatives from the Cambridge & Paul Instrument Company, with a handwritten follow-up note on their arrival. | 1st Feb 1924 | Box 25 \ 3 Scan113 | |
| Torsional vibration in the gearbox coupling and proposing a simpler, stiffer design. | 9th Feb 1924 | Box 25 \ 3 Scan114 | |
| Secret memo detailing the causes and potential solutions for over-run vibration in an E.A.C. engine. | 9th Feb 1924 | Box 25 \ 3 Scan115 | |
| Investigating retard vibrations related to the torsional period of the driveshaft. | 16th Feb 1924 | Box 25 \ 3 Scan116 | |
| Testing a disc crankshaft for a 20 HP engine. | 20th Feb 1924 | Box 25 \ 3 Scan117 | |
| Continuation page recommending the fitting of a damped spring drive. | 27th Feb 1934 | Box 25 \ 3 Scan118 | |
| Tests to reduce retard vibration on the EAC car. | 27th Feb 1934 | Box 25 \ 3 Scan119 | |
| Overrun vibration on the E.A.C. engine and the fitting of Hawk connecting rods. | 10th Mar 1924 | Box 25 \ 3 Scan120 | |
| Engine vibration issue in a Goshawk 11 vehicle at high speed. | 10th Jun 1924 | Box 25 \ 3 Scan121 | |
| Specifications for items on the 93-NK car, including the starter motor, gearbox, and steering. | 31th Oct 1924 | Box 25 \ 3 Scan122 | |
| Plans and anticipated issues for car models EAC.11 and 93-NK. | 4th Jul 1924 | Box 25 \ 3 Scan123 | |
| Engine vibrations and comparisons between different car models. | 4th Jul 1924 | Box 25 \ 3 Scan124 | |
| Page explaining the reason for fitting high compression pistons to car 93-NK. | 3rd Nov 1924 | Box 25 \ 3 Scan125 | |
| Engine vibration issues in car 46-PK and the final EAC.11 engine design. | 3rd Nov 1924 | Box 25 \ 3 Scan126 | |
| Secret memo discussing engine vibrations in the EAC.11 model and a related policy change for its intended use. | 4th Nov 1924 | Box 25 \ 3 Scan127 | |
| Brochure for the K.B.B. Vibrometer used for the detection and investigation of vibration in machinery. | 26th Nov 1924 | Box 25 \ 3 Scan128 | |
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