| Description | Date | Identifier | |
| Introduction of a new type at Olympia and the chassis delivery schedule. | 16th Jan 1913 | Box 3 \ 1 01-page077 | |
| Diagnosing and resolving engine vibration in a limousine, distinguishing it from axle vibration. | 16th Jan 1913 | Box 3 \ 1 01-page078 | |
| Benefits of a new balance weight arrangement for reducing engine friction and stress. | 28th Jan 1913 | Box 3 \ 1 01-page079 | |
| Departmental memo confirming the availability of Limousine No: 2095 for extended testing and demonstration. | 28th Jan 1913 | Box 3 \ 1 01-page080 | |
| To Mr. Hives forwarding a letter from Sales concerning the testing and demonstration of Limousine No. 2095. | 4th Feb 1913 | Box 3 \ 1 01-page081 | |
| Vibration issues and tests conducted on Mr. Worthy's car no. 2025. | 8th Feb 1913 | Box 3 \ 1 01-page082 | |
| Results of numbered engine vibration and performance tests under various conditions. | 27th May 1928 | Box 3 \ 1 01-page083 | |
| Test report on chassis vibration issues, comparing results from different cars and test setups. | 27th May 1928 | Box 3 \ 1 01-page084 | |
| Troubleshooting an engine vibration issue by testing engine belts and front suspension components. | | Box 3 \ 1 01-page085 | |
| Investigating mass vibration on a car at 20 miles per hour and requesting an experimental report. | 26th Feb 1913 | Box 3 \ 1 01-page086 | |
| To Mr Hives concerning a report on vibrations and booming, enclosing a memo from Mr Royce. | 3rd Mar 1913 | Box 3 \ 1 01-page087 | |
| Analysis of torsional engine vibrations in the chassis frame at low and medium RPMs. | 16th Jul 1913 | Box 3 \ 1 01-page088 | |
| Potential causes for excessive vibration in car 2301. | 16th Jul 1913 | Box 3 \ 1 01-page089 | |
| From F.H.R. to Mr Wor. discussing issues with a light piston and proposing modifications for investigation. | 19th Aug 1913 | Box 3 \ 1 01-page090 | |
| The performance, vibration and ignition of car 2201 following a weekend trial. | 19th Aug 1913 | Box 3 \ 1 01-page091 | |
| Analysis of engine vibration issues, referencing compression, carbon deposits, and piston ring efficiency. | 19th Aug 1913 | Box 3 \ 1 01-page092 | |
| Engine vibrations, causes, and tests with different pistons. | 19th Aug 1913 | Box 3 \ 1 01-page093 | |
| Engine vibration, power output, and fuel mixture adjustments following tests and a demonstration to Mr. Royce. | 20th Aug 1913 | Box 3 \ 1 01-page094 | |
| Cover note for a report sent to Mr. Johnson, with a copy attached as requested by Mr. Mercer. | 20th Aug 1913 | Box 3 \ 1 01-page095 | |
| Investigation into the cause and characteristics of a 'booming' sound in certain car models. | 14th Nov 1913 | Box 3 \ 1 01-page096 | |
| The causes of and solutions for roof 'booming' and vibrations. | 14th Nov 1913 | Box 3 \ 1 01-page097 | |
| Suggestion for applying 'method B' to existing cars by adding a third windscreen hinge. | 19th Nov 1913 | Box 3 \ 1 01-page098 | |
| Experimental run on car 2300 to test a cure for body booms. | 19th Nov 1913 | Box 3 \ 1 01-page099 | |
| Instruction sheet detailing tests to reduce 'booming' in car roofs by stiffening them with steel fish-plates. | 26th Jul 1911 | Box 3 \ 1 01-page100 | |
| Road tests investigating a 'booming' sound in existing cars by stiffening the roof. | 25th Nov 1913 | Box 3 \ 1 01-page101 | |
| Departmental memo discussing the cause and remedy for a 'booming' sound in cars. | 26th Nov 1913 | Box 3 \ 1 01-page102 | |
| 'body booming' issue on experimental car 2300, attaching a related report and seeking approval to test a solution. | 27th Nov 1913 | Box 3 \ 1 01-page103 | |
| The issue of 'body booming' in car 230D and the application of proposed solutions. | 1st Dec 1913 | Box 3 \ 1 01-page104 | |
| Response to a suggestion about body booming on car 2300, explaining why it's not possible due to construction differences. | 1st Dec 1913 | Box 3 \ 1 01-page105 | |
| Cause of body booming in experimental car X971, suggesting leather panels are to blame. | 12th Dec 1913 | Box 3 \ 1 01-page106 | |
| Instructions regarding the desired color and aging of leather for a car interior. | 3rd Dec 1913 | Box 3 \ 1 01-page107 | |
| 'booming' sound from the car body, caused by the tension of leather panels. | 4th Dec 1913 | Box 3 \ 1 01-page108 | |
| 'booming' noise on experimental car 2300 and the inapplicability of a suggested cure due to the car's body construction. | 8th Dec 1913 | Box 3 \ 1 01-page109 | |
| 'booming' noise from car panels and the objection to a proposed alteration. | 17th Feb 1914 | Box 3 \ 1 01-page110 | |
| From 'R.' to 'J.' regarding a suggestion to test Mr. Spinney's ideas on 'booming bodies'. | 17th Feb 1914 | Box 3 \ 1 01-page111 | |
| Departmental memo querying whether a suggestion from 'Spinney' is good or bad. | 6th Nov 1914 | Box 3 \ 1 01-page112 | |
| Requesting an investigation into 'booming' noises on the chassis, specifically related to the undershield. | 11th Nov 1919 | Box 3 \ 1 01-page113 | |
| Engine booming and rattling noises caused by radiator plates. | 21th Nov 1919 | Box 3 \ 1 01-page114 | |
| 20 HP car with underframe body suspension, comparing its performance in reducing chassis vibration. | 14th Jul 1924 | Box 3 \ 1 01-page115 | |
| Vibrations and body booming issues in 40/50 and 20-HP chassis. | 2nd Oct 1924 | Box 3 \ 1 01-page116 | |
| Analysis of the various causes of vibrations and noises, particularly in relation to different chassis and 'boomy' body types. | 2nd Oct 1924 | Box 3 \ 1 01-page117 | |
| Vibrations and booming noises from the exhaust, particularly when fitting 'boomy type bodies'. | 3rd Oct 1924 | Box 3 \ 1 01-page118 | |
| Ongoing issue of exhaust pipe vibration on the 20-HP Chassis. | 3rd Oct 1924 | Box 3 \ 1 01-page119 | |
| Testing a special sub-frame on a 20-HP car to address vibration and body booming. | 7th Oct 1924 | Box 3 \ 1 01-page120 | |
| Resolving vibrations and body booming on 40/50 HP and 20 HP models, in discussion with coachbuilder Barkers. | 16th Oct 1924 | Box 3 \ 1 01-page121 | |
| Vibrations and body booming issues in 40/50 HP and 20 HP cars, and the work being done by the Experimental Dept. | 7th Oct 1924 | Box 3 \ 1 01-page122 | |
| Letter to a Mr. Nutt regarding an investigation into a 'booming' or noisy car, discussing the roles of the chassis and body. | 7th Oct 1924 | Box 3 \ 1 01-page123 | |
| Letter discussing noise and resonance issues in closed car bodies and proposing a meeting of experts to resolve the matter. | 16th Oct 1924 | Box 3 \ 1 01-page124 | |
| Letter from Barker & Co Coachbuilders to Basil Johnson regarding chassis vibration and testing. | 16th Oct 1924 | Box 3 \ 1 01-page125 | |
| Letter discussing the benefits of the Patent Coupé de Ville Leather Extension for reducing chassis vibration in enclosed car bodies. | 17th Oct 1924 | Box 3 \ 1 01-page126 | |
| Letter discussing the difficulty of locating the source of 'booming' noises in vehicles and the desire for a diagnostic instrument. | 17th Oct 1924 | Box 3 \ 1 01-page127 | |
| Letter discussing methods for reducing chassis and body noise, particularly through the use of leather roofs and extensions. | 18th Oct 1924 | Box 3 \ 1 01-page128 | |
| The value of a sub-frame for reducing body noise on a 20 HP car. | 18th Oct 1924 | Box 3 \ 1 01-page129 | |
| Referral note for further information. | 18th Oct 1924 | Box 3 \ 1 01-page130 | |
| Blank page or divider with the number 182 written at the top. | 6th Mar 1912 | Box 3 \ 1 01-page131 | |
| To the technical committee regarding the design and application of helical gears. | 6th Mar 1912 | Box 3 \ 1 01-page132 | |
| Request for a set of helical gears with a 2-0 obliquity tool form to resolve interference issues. | 7th Mar 1912 | Box 3 \ 1 01-page133 | |
| Instruction requesting the production of 20° obliquity helical timing gears, noting a required tooling change. | 10th Feb 1913 | Box 3 \ 1 01-page134 | |
| Instruction that experimental cars should not be sold with experimental helical gears, which must be replaced with stock parts. | 10th Mar 1913 | Box 3 \ 1 01-page135 | |
| Directive to prevent the sale of cars fitted with experimental helical engine gears. | 11th Mar 1913 | Box 3 \ 1 01-page136 | |
| Performance of a 20-degree angle axle and suggesting further testing. | 7th Aug 1913 | Box 3 \ 1 01-page137 | |
| Quoting Mr Royce on helical engine gears with 20° obliquity, and asking Mr Elliott whether a test should be abandoned. | 27th Sep 1913 | Box 3 \ 1 01-page138 | |
| Numbered page, possibly a divider or blank sheet. | 24th Jul 1913 | Box 3 \ 1 01-page139 | |
| Status update on experiments concerning a radiator, a central braking device, and a worm axle. | 24th Jul 1913 | Box 3 \ 1 01-page140 | |
| Experiment No.183, a hand adjustment for the top shoe of the footbrake. | 31th Jul 1913 | Box 3 \ 1 01-page141 | |
| The central brake's locking device and adjustment for brake straps. | 6th Aug 1913 | Box 3 \ 1 01-page142 | |
| Mostly blank page with the page number 184. | 14th Oct 1912 | Box 3 \ 1 01-page143 | |
| Internal instruction memo about standardising the use of varnish-filled coils instead of paraffin wax ones. | 14th Oct 1912 | Box 3 \ 1 01-page144 | |
| Note instructing a change in the filling material for induction coils from paraffin wax to varnish. | 21th Dec 1912 | Box 3 \ 1 01-page145 | |
| Instruction sheet for special work on a test van, including fitting a special magneto, carburettor, and coil. | 21th Jan 1913 | Box 3 \ 1 01-page146 | |
| Requesting a report on a special varnished coil and condenser provided to the Experimental Shop. | 8th Mar 1914 | Box 3 \ 1 01-page147 | |
| Blank page with the number 169 at the top. | 9th Jun 1920 | Box 3 \ 1 01-page148 | |
| Design and placement of a trembler and coil unit. | 9th Jun 1920 | Box 3 \ 1 01-page149 | |
| Departmental memo concerning the removal of a coil from the dashboard of car 1649 for potential standardisation. | 2nd Oct 1912 | Box 3 \ 1 01-page150 | |
| Explaining why a test on an Auto Trembler & separate Coil was stopped by Mr Royce. | 28th Aug 1913 | Box 3 \ 1 01-page151 | |
| Improving the design of a trembler by addressing issues with a sticking hinge pin. | 22th Apr 1915 | Box 3 \ 1 01-page152 | |
| Report from Mr. Ellis on the performance of a Carpentier trembler action coil compared to standard coils. | 29th Apr 1915 | Box 3 \ 1 01-page153 | |
| Work instructions concerning a loud engine knock and subsequent testing. | 27th Jan 1919 | Box 3 \ 1 01-page154 | |
| The status of an Auto Trembler separate action coil. | 2nd Jun 1915 | Box 3 \ 1 01-page155 | |
| Design and issues with a trembler induction coil, including damage sustained during transit. | 18th Jun 1915 | Box 3 \ 1 01-page156 | |
| Sending a Trembler and Coil, clarifying a model type, and advising on the earth connection. | 22th Jun 1915 | Box 3 \ 1 01-page157 | |
| Blank page with a handwritten number 188. | 30th Jan 1913 | Box 3 \ 1 01-page158 | |
| Short memo regarding feedback on the performance of compressed Ferodo from a motor lorry maker. | 30th Jan 1913 | Box 3 \ 1 01-page159 | |
| Experiment with Ferodo tips and cast iron brakes. | 12th Feb 1928 | Box 3 \ 1 01-page160 | |
| Tests of a 22° radiator and two different footbrake designs. | 12th Mar 1913 | Box 3 \ 1 01-page161 | |
| From F.H.R. responding to a weekly report with directives on axle tests, radiators, liners, and brakes. | 12th Mar 1913 | Box 3 \ 1 01-page162 | |
| Telegram from Royce with instructions on radiators, suspension, brakes, and material tests. | 14th Jul 1914 | Box 3 \ 1 01-page163 | |
| The performance of foot-brakes fitted with cast iron shoes and Ferodo Tips. | 5th Aug 1914 | Box 3 \ 1 01-page164 | |
| Extract from a memo by Mr Royce regarding a change in the design of brake liners with Ferodo tips. | 11th Aug 1914 | Box 3 \ 1 01-page165 | |
| Blank page with the number 189 stamped in the top right corner. | 8th Nov 1911 | Box 3 \ 1 01-page166 | |
| Departmental memo discussing experiments and improvements for shock absorbers and springs. | 8th Nov 1911 | Box 3 \ 1 01-page167 | |
| Suggesting a redesign of a joint to increase its strength and wearing surfaces. | 1st Jan 1927 | Box 3 \ 1 01-page168 | |
| Committee meeting report on testing and standardizing shock absorber pressure settings. | 19th Dec 1911 | Box 3 \ 1 01-page169 | |
| Meeting minutes discussing increasing the spring load on standard shock absorbers. | 19th Dec 1911 | Box 3 \ 1 01-page170 | |
| The design and resistance of shock absorber springs. | 20th Dec 1911 | Box 3 \ 1 01-page171 | |
| Meeting minute discussing spring load on standard shock absorbers. | 20th Dec 1911 | Box 3 \ 1 01-page172 | |
| Departmental memo discussing springing for road springs and the incompatibility of oiling them when using shock absorbers. | 19th Oct 1912 | Box 3 \ 1 01-page173 | |
| Value and effect of shock absorbers on undulating roads. | 28th Nov 1912 | Box 3 \ 1 01-page174 | |
| The effectiveness of shock absorbers compared to the damping effect of spring leaves on poor road conditions. | 28th Nov 1912 | Box 3 \ 1 01-page175 | |
| Typed document page discussing the advantage of well-lubricated spring leaves on undulating roads. | 25th Nov 1912 | Box 3 \ 1 01-page176 | |
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