| Description | Date | Identifier | |
| Instructions concerning the correct setting of valve clearances, cam timing, and timing chain tension on engine R 11 C. | 29th Apr 1914 | Box 2 \ B002_X168 00000001-page237 | |
| The life of front axle pivots during bumping tests. | 29th Apr 1914 | Box 2 \ B002_X168 00000001-page238 | |
| Test report on the durability and life of different front axle pivot designs. | 29th Apr 1914 | Box 2 \ B002_X168 00000001-page239 | |
| Internal instruction sheet regarding a modification to a spring mounting. | 7th May 1914 | Box 2 \ B002_X168 00000001-page240 | |
| Instructions to proceed with ordering parts for an experiment on steering pivots. | 7th May 1914 | Box 2 \ B002_X168 00000001-page241 | |
| Extract from Mr. Platford's report on steering issues with cars during the Spanish Grand Prix. | 1st Apr 1919 | Box 2 \ B002_X168 00000001-page242 | |
| Internal instruction sheet outlining modifications to a vehicle's suspension, steering, engine, and wheels. | 1st Apr 1919 | Box 2 \ B002_X168 00000001-page243 | |
| Double rear brakes and weak torque tubes, quoting Mr. Royce on personnel workload. | 11th Aug 1914 | Box 2 \ B002_X168 00000001-page244 | |
| Bumping test of longer and stronger buffer springs of round section wire in a side steering tube. | 20th Aug 1914 | Box 2 \ B002_X168 00000001-page245 | |
| Standardisation of longer and stronger buffer springs for the side steering tube. | 27th Aug 1914 | Box 2 \ B002_X168 00000001-page246 | |
| The fitment of pivots, part number F.2352/3, to car number 2141 and other series. | 19th Oct 1914 | Box 2 \ B002_X168 00000001-page247 | |
| List of experiments carried out and parts removed from Chassis 2300. | 22th Oct 1914 | Box 2 \ B002_X168 00000001-page248 | |
| Asking Mr Thrupp for his preference on an interior finish that needs matching. | 1st Nov 1924 | Box 2 \ B002_X168 00000001-page249 | |
| Modifications to the lean of steering pivots to improve vehicle stability and address low speed wobble. | 12th Nov 1915 | Box 2 \ B002_X168 00000001-page250 | |
| Investigation and testing of steering wobble issues. | 15th Nov 1915 | Box 2 \ B002_X168 00000001-page251 | |
| Adjustments to the lean of steering pivots and proposals for further experiments. | 15th Nov 1915 | Box 2 \ B002_X168 00000001-page252 | |
| Experiment on Double Rear Brakes combined with old type Torque Tubes. | 16th Nov 1914 | Box 2 \ B002_X168 00000001-page253 | |
| Suggesting a destructive test on an old type torque tube when combined with double rear brakes. | 16th Dec 1914 | Box 2 \ B002_X168 00000001-page254 | |
| Text, likely a company name or signature on a document fragment. | 6th Jan 1915 | Box 2 \ B002_X168 00000001-page255 | |
| The test of old type weak torque tubes with double hour brakes. | 6th Jan 1915 | Box 2 \ B002_X168 00000001-page256 | |
| Stating that the experiment on double rear brakes and old type weak torque tubes is to be abandoned. | 27th Jan 1916 | Box 2 \ B002_X168 00000001-page257 | |
| Angle and rake of steering pivots in relation to changes in the car's rear height. | 17th Nov 1915 | Box 2 \ B002_X168 00000001-page258 | |
| List of new and experimental parts fitted to Humper Chassis X.1131. | 2nd Oct 1919 | Box 2 \ B002_X168 00000001-page259 | |
| The minimum satisfactory life for springs, axle pivots, and steering levers on a bumping rig. | 1st Sep 1928 | Box 2 \ B002_X168 00000001-page260 | |
| Blank page with page number 171. | 3rd Oct 1923 | Box 3 \ 1 01-page001 | |
| Engine vibrations and potential improvements to the frame and engine mounting. | 3rd Oct 1923 | Box 3 \ 1 01-page002 | |
| Numbered, otherwise blank, archival page. | 6th Nov 1912 | Box 3 \ 1 01-page003 | |
| Departmental memo requesting the fitting and strength testing of a new die-cast steering wheel. | 6th Nov 1912 | Box 3 \ 1 01-page004 | |
| Strength and deflection test results comparing a die-cast steering hand wheel with a standard sand-cast version. | 19th Nov 1912 | Box 3 \ 1 01-page005 | |
| Failure at the casting point. | 5th Dec 1912 | Box 3 \ 1 01-page006 | |
| Urgent instruction to send a partially machined steering hand wheel to the Experimental Department. | 19th Nov 1912 | Box 3 \ 1 01-page007 | |
| Experimental card detailing tests on a steering hand wheel, including deflection measurements under load. | 6th Dec 1912 | Box 3 \ 1 01-page008 | |
| Test results for die-cast and sand-cast wheels, measuring rim deflection under increasing loads. | 23th Dec 1912 | Box 3 \ 1 01-page009 | |
| Departmental memo requesting a report on the strength of supplied steering wheels. | 7th Jan 1913 | Box 3 \ 1 01-page010 | |
| Departmental memo chasing an overdue report on steering wheels. | 15th Jan 1913 | Box 3 \ 1 01-page011 | |
| Methodology for testing steering hand wheels made of various metals. | 31th Jan 1913 | Box 3 \ 1 01-page012 | |
| Test results and failure analysis for a special annealed die-cast aluminium steering wheel. | 31th Jan 1913 | Box 3 \ 1 01-page013 | |
| Test report on the failure of a die-cast unannealed aluminium steering wheel under load. | 31th Jan 1913 | Box 3 \ 1 01-page014 | |
| Test results for a sand-cast, unannealed aluminium steering wheel, showing load versus deflection data and fracture analysis. | 31th Jan 1913 | Box 3 \ 1 01-page015 | |
| Report comparing the strength and appearance of different hand wheels after fracture testing. | 3rd Feb 1913 | Box 3 \ 1 01-page016 | |
| Departmental memo regarding the correspondence and experimental card for the strength tests of various steering hand wheels. | 3rd Feb 1913 | Box 3 \ 1 01-page017 | |
| From F.H.R. regarding tests on steering hand wheels, stating they are strong enough and die-cast versions are preferable. | 3rd Feb 1913 | Box 3 \ 1 01-page018 | |
| Results of steering hand wheel strength tests and the adoption of die-cast wheels as standard. | 5th Feb 1913 | Box 3 \ 1 01-page019 | |
| Delay in dispatching a large diameter steering wheel for chassis 7 CA. | 13th Feb 1914 | Box 3 \ 1 01-page020 | |
| List of modifications including springs, shock absorbers, clutch, steering, and a new 24° angle radiator. | 6th Mar 1914 | Box 3 \ 1 01-page021 | |
| Reallocation of an 18' diameter steering hand wheel to the Northcliffe chassis. | 9th Mar 1914 | Box 3 \ 1 01-page022 | |
| Delivery and testing of three large steering wheels at the request of Mr Royce. | 18th Aug 1914 | Box 3 \ 1 01-page023 | |
| And reply concerning the allocation of large steering wheels for the Northcliffe chassis. | 16th Mar 1914 | Box 3 \ 1 01-page024 | |
| Mr. Royce's requested modifications to an 18' steering wheel model. | 16th Dec 1922 | Box 3 \ 1 01-page025 | |
| Design and construction of a larger steering wheel for the 40/50 model, comparing it to the Goshawk version. | 26th Apr 1923 | Box 3 \ 1 01-page026 | |
| Examination of a patent steering wheel received from Italy. | 5th Feb 1936 | Box 3 \ 1 01-page027 | |
| Mostly blank page with the handwritten number 173 at the top. | 16th Jul 1912 | Box 3 \ 1 01-page028 | |
| Letter to Mr. Nadin concerning engine instructions for chassis 1649. | 16th Jul 1912 | Box 3 \ 1 01-page029 | |
| Instructions for the engine specifications of Chassis 164B, to be similar to the 'Sluggard' car. | 15th Mar 1912 | Box 3 \ 1 01-page030 | |
| Relaying Mr. Royce's instructions for an experimental car to remain at the works for fitting new parts, rather than being sent to France. | 30th Apr 1912 | Box 3 \ 1 01-page031 | |
| Departmental memo discussing issues with helical gears and inverted springs, and requesting a review of ventilated side guards. | 30th Apr 1912 | Box 3 \ 1 01-page032 | |
| Departmental memo discussing the performance of a spring coupling and balance weights. | 30th Apr 1912 | Box 3 \ 1 01-page033 | |
| Departmental memo detailing experiments on crankshaft balance weights and high compression pistons. | 30th Apr 1912 | Box 3 \ 1 01-page034 | |
| Departmental memo detailing specifications and modifications for engine components including piston rings, induction pipe, carburettor, coil, magneto, and tappets. | 30th Apr 1912 | Box 3 \ 1 01-page035 | |
| Departmental memo discussing the performance of a cotton fabric clutch, R.B.F. ball bearings, and frame trusses. | 28th Mar 1912 | Box 3 \ 1 01-page036 | |
| Departmental memo detailing observations on various vehicle components such as the axle, dynamo and wheels. | 28th Mar 1912 | Box 3 \ 1 01-page037 | |
| Departmental memo detailing special modifications and parts supplied with a car. | 8th Sep 1912 | Box 3 \ 1 01-page038 | |
| Cover note sending r Platford's report concerning chassis 1649 to Mr Royce. | 8th Sep 1912 | Box 3 \ 1 01-page039 | |
| Departmental memo confirming arrangements to send car 1649 to Mr Royce for fitting experimental parts and exchanging it for car 2004. | 31th Aug 1912 | Box 3 \ 1 01-page040 | |
| Delayed despatch of Chassis 164B to Crowborough. | 3rd Sep 1912 | Box 3 \ 1 01-page041 | |
| Departmental memo regarding the altered Chassis No. 1649, requesting updated records for future spare parts supply. | 4th Sep 1913 | Box 3 \ 1 01-page042 | |
| Instructions to the Experimental Department to provide complete records and drawing numbers for the considerably altered Chassis 1649. | 4th Sep 1913 | Box 3 \ 1 01-page043 | |
| Querying the status of completed record cards for Chassis 1649. | 10th Sep 1913 | Box 3 \ 1 01-page044 | |
| Sending Mr. Harkness's original report on the timing gears for chassis 1649. | 23th Sep 1913 | Box 3 \ 1 01-page045 | |
| Correcting the record card description for engine gears on chassis 1649 from helical to old standard spur wheels. | 25th Sep 1913 | Box 3 \ 1 01-page046 | |
| Page with handwritten number 174 in the top right corner. | 4th Feb 1913 | Box 3 \ 1 01-page047 | |
| Instructions to cast two pedal gap plates in different gauge metals without strengthening ribs or bosses. | 4th Feb 1913 | Box 3 \ 1 01-page048 | |
| Instruction sheet for experimental pedal gap plates. | 21th Feb 1913 | Box 3 \ 1 01-page049 | |
| Departmental memo regarding Experiment 174, concerning the fixing of sheet Aluminium Cap Plates to experimental chassis. | 22th Feb 1913 | Box 3 \ 1 01-page050 | |
| Instruction sheet regarding experiments with hardening a rear gap piece. | 21th Feb 1913 | Box 3 \ 1 01-page051 | |
| Instruction to fit sheet aluminium Pedal Gap Plates on all Experimental Chassis. | 22th Feb 1913 | Box 3 \ 1 01-page052 | |
| Instructions for fitting a 16's S.W.G. sheet aluminium pedal gap plate to chassis 2200. | 1st Mar 1913 | Box 3 \ 1 01-page053 | |
| Instruction sheet confirming the fitting of Pedal Gap Plates to two chassis. | 14th Mar 1913 | Box 3 \ 1 01-page054 | |
| Request for a report on Pedal Gap Plates made from thinner metal fitted to specific chassis. | 11th Apr 1913 | Box 3 \ 1 01-page055 | |
| Experiment No. 174 regarding pedal gap plates made from thinner metal. | 15th Apr 1913 | Box 3 \ 1 01-page056 | |
| Blank page with the handwritten page number 175. | 19th Oct 1912 | Box 3 \ 1 01-page057 | |
| Performance of a ½ inch Whittle belt for a dynamo drive on a 171E car. | 19th Oct 1912 | Box 3 \ 1 01-page058 | |
| Note comparing belt maintenance on a Lanchester with a Lucas Lighting Set to a Rolls-Royce with a C.A.V. set. | 30th Jan 1913 | Box 3 \ 1 01-page059 | |
| Testing the stretching of 1/2 inch dynamo belts before use. | 4th Feb 1913 | Box 3 \ 1 01-page060 | |
| The performance, wear, and recommended running-in procedure for dynamo belts. | 4th Feb 1913 | Box 3 \ 1 01-page061 | |
| Blank document page with the number 176 handwritten at the top. | 4th Feb 1913 | Box 3 \ 1 01-page062 | |
| Blank page with the handwritten page number 177 at the top. | 22th Sep 1911 | Box 3 \ 1 01-page063 | |
| Improving the lubrication of a cam mechanism with make and brake contact. | 22th Sep 1911 | Box 3 \ 1 01-page064 | |
| To Mr. Badin regarding the lubrication of the cam mechanism with make and break contact, requesting a reply to a previous letter. | 20th Oct 1911 | Box 3 \ 1 01-page065 | |
| The lubrication of a cam mechanism with make and break contact. | 8th Jul 1912 | Box 3 \ 1 01-page066 | |
| Instructions regarding a scheme for drip feed lubrication of a cam mechanism with a make and break contact. | 3rd Oct 1912 | Box 3 \ 1 01-page067 | |
| Departmental memo regarding the lubrication of the cam mechanism with make and break contact. | 1st Jan 1913 | Box 3 \ 1 01-page068 | |
| Departmental memo regarding the lubrication of a cam mechanism for a make and break contact. | 7th Feb 1913 | Box 3 \ 1 01-page069 | |
| Blank document page with a handwritten page number '181'. | 8th Feb 1911 | Box 3 \ 1 01-page070 | |
| Letter discussing a noisy car body, the potential use of a Kellner body for testing, and caution regarding a new four-inch engine. | 8th Feb 1911 | Box 3 \ 1 01-page071 | |
| New engine development strategy, the importance of extensive testing before standard production, and referencing specific engine types. | 30th Oct 1912 | Box 3 \ 1 01-page072 | |
| Extract from a memo regarding an extraordinary rumble and vibration on car 2095. | 30th Oct 1912 | Box 3 \ 1 01-page073 | |
| Meeting notes discussing a suggestion by Mr. Barrington regarding engine rattles and the transmission of rotary vibrations to the chassis. | 4th Dec 1911 | Box 3 \ 1 01-page074 | |
| Noisy car body, the unsuitability of a Kellner body, and cautioning against the early adoption of a new four-inch engine. | 8th Feb 1911 | Box 3 \ 1 01-page075 | |
| Internal discussion regarding the development and testing of a new engine type before standardizing production. | 8th Feb 1911 | Box 3 \ 1 01-page076 | |
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