| Description | Date | Identifier | |
| Departmental memo discussing the suitability of steel studded tyres, with handwritten notes from Mr. Royce. | 2nd Sep 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page104 | |
| Test comparing the diameter of a new tyre versus a well-worn tyre, noting the effect of stretch. | 14th Sep 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page105 | |
| Quoting Mr. Royce's remarks on tyre selection, comparing studded, plain, and grooved tyres. | 29th Oct 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page106 | |
| Use of plain tyres on experimental cars. | 1st Nov 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page107 | |
| R.A.C. certificate of performance for a 5,000 miles trial of four Stelastic pneumatic tyres. | 9th Nov 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page108 | |
| Article from 'The Autocar' detailing the design and performance of the Stelastic Tyre. | 5th Oct 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page109 | |
| Article from The Autocar magazine discussing the construction and evolution of the Beldam steel-plated non-slipping tyre. | 5th Oct 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page110 | |
| Internal instruction about the safety risks of plain tyres on greasy Derbyshire roads and the recommendation to use non-skid tyres. | 11th Nov 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page111 | |
| Requesting a test on Helsby tyres, detailing a guarantee for their mileage. | 8th Apr 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page112 | |
| Departmental memo regarding a test and subsequent order of Helsby tyres. | 8th Apr 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page113 | |
| The testing and performance of Helsby X.315 tyres on chassis 2301. | 22th Apr 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page114 | |
| Remarks from F.H.R. regarding the performance of Helsby tyres. | 10th Jun 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page115 | |
| Offer from a manufacturer for a replacement Continental tyre cover at a reduced price. | 4th Jul 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page116 | |
| Report and offer from a cable company to re-tread a tyre cover with two options. | 8th Jul 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page117 | |
| Authorising the retreading of a Helsby tyre carcase with grooved rubber. | 9th Jul 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page118 | |
| Extract from a report on tyre performance at the Spanish Grand Prix. | 17th Sep 1914 | Box 1 \ 7 B001_X15 20 46 50 59-page119 | |
| Report from Hurst detailing tyre wear and performance on chassis 2301. | 14th Jul 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page120 | |
| Set of Helsby tyres to be fitted to chassis 2301, with handwritten notes on their performance and retreading. | 17th Apr 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page121 | |
| The satisfactory performance of Prowodnik tyres in the Spanish Trials. | 16th May 1914 | Box 1 \ 7 B001_X15 20 46 50 59-page122 | |
| Extract from a report on tyre mileage and performance issues. | 1st May 1914 | Box 1 \ 7 B001_X15 20 46 50 59-page123 | |
| Axle vibrations caused by different types of tyres, and observations on tyres in New York. | 30th Nov 1914 | Box 1 \ 7 B001_X15 20 46 50 59-page124 | |
| Testing solid, Dunlop, Palmer, and over-size tyres on a bumping rig. | 1st Jan 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page125 | |
| Record of tyre mileage and performance on Mr. Victor Harrison's Car - 2608. | 30th May 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page126 | |
| Investigating the suitability of Ford-sized tyres (760 m/m) for the 20 HP chassis. | 1st Aug 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page127 | |
| Comparison table of 895x135 tyres, detailing their specifications, price, and mileage performance. | 1st Aug 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page128 | |
| Log sheet detailing specifications and notes for various tyre sizes and makes. | 1st Aug 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page129 | |
| Table of various tyre sizes, nominal diameters, and manufacturers. | 16th Jan 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page130 | |
| Article from 'THE AUTOCAR' detailing comparative tests between Palmer cord tyres and standard canvas tyres at Brooklands. | 16th Jan 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page131 | |
| Letter from Spreckels 'Savage' Tire Co. regarding their direct-to-manufacturer supply model. | 22th Jul 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page132 | |
| Letter proposing a business partnership to supply high-grade hand-made tires from an American company. | 1st Aug 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page133 | |
| Translated article explaining the construction and economy of Cable Tyres compared to canvas tyres. | 1st Aug 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page134 | |
| Technical explanation of tyre construction, focusing on the fabric 'tissue' (warp and woof) and the generation of heat through friction. | 1st Aug 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page135 | |
| Analysis of tyre failure due to heat generation, internal friction, and canvas construction. | 1st Aug 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page136 | |
| Comparison of Cable tyres and canvas tyres, focusing on construction, handling, and obstacle absorption experiments. | 1st Aug 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page137 | |
| Energy absorption and resistance tests conducted on 'Canvas Cover' and 'Cable Cover' type tyres. | 1st Aug 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page138 | |
| Report comparing the performance and fuel economy of Cable tyres versus Canvas tyres, focusing on climbing gradients. | 1st Aug 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page139 | |
| Conclusion on the performance and cost of Cable Tyres, comparing mileage against canvas tyres. | 1st Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page140 | |
| Complaints from America about car riding issues caused by very hard tyres and comparing experiences with Palmer and American tyres. | 1st Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page141 | |
| Tyre pressure tests and mileage comparisons between Goodyear and Dunlop tyres. | 1st Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page142 | |
| Tyre pressure, fitting, tread patterns, and noise issues. | 1st Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page143 | |
| Continued document discussing the noise characteristics of Wood Milne tyres. | 1st Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page144 | |
| Extract discussing wrong impressions of present production cars, attributing complaints to American tyres and the need for a run-in period. | 7th Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page145 | |
| Steering faults, specifically 'steering wobbles', and proposed remedies. | 7th Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page146 | |
| Page from a report discussing steering, wheel rim quality, and transmission knock. | 7th Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page147 | |
| Chassis improvements including leaf springs, transmission control, torque tubes, and electrical wiring diagrams. | 19th Jul 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page148 | |
| From Mr. Royce detailing his autumn test run and evaluation of the 1.EX production car. | 26th Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page149 | |
| Improving ride quality through changes to tyres, suspension, and axle gearing. | 26th Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page150 | |
| Car performance, covering the Hawk aero engine, suspension, and recommendations for improvements. | 26th Sep 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page151 | |
| Removal of the tyre inflation table from the chassis instruction book and recommending a lower tyre pressure. | 4th Oct 1920 | Box 1 \ 7 B001_X15 20 46 50 59-page152 | |
| Offer from The Standard Tyre & Rubber Manufacturers Ltd. to supply a set of tyres for testing. | 20th Oct 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page153 | |
| Letter from a tyre manufacturer proposing to supply tyres and tubes, and requesting facilities for testing. | 19th Oct 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page154 | |
| Letter to The Standard Tyre & Rubber Mfrs Ltd regarding the supply and testing of tyres for a chassis. | 18th Oct 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page155 | |
| Letter to The Standard Tyre & Rubber Manufacturers Ltd. regarding a test of their tyres. | 20th Oct 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page156 | |
| Requesting an opinion on the experience of burst front tyres. | 23th Mar 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page157 | |
| Copy of a letter from Mr. de Salamanca detailing customer feedback, competitor car comparisons, and potential sales. | 18th Mar 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page158 | |
| Steering control on a 40/50 chassis, particularly concerning burst front tyres and a suggestion for improvement. | 30th Mar 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page159 | |
| Steering safety on the 40/50 HP chassis, recommending the continued use of security bolts. | 1st Apr 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page160 | |
| Danger of front tyre bursts and the effectiveness of irreversible steering. | 12th Apr 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page161 | |
| Letter offering a patented device for pneumatic tyres for consideration and sale. | 19th Dec 1921 | Box 1 \ 7 B001_X15 20 46 50 59-page162 | |
| Design for a 'Thomson' Puncture & Skid Preventer using flexible steel bands. | 2nd Feb 1923 | Box 1 \ 7 B001_X15 20 46 50 59-page163 | |
| Technical implications, particularly weight, of a new puncture-immune inner tube. | 2nd Feb 1923 | Box 1 \ 7 B001_X15 20 46 50 59-page164 | |
| Percentage increase in weight caused by a new inner tube and discussing the associated technical objections and advantages. | 2nd Feb 1923 | Box 1 \ 7 B001_X15 20 46 50 59-page165 | |
| Letter discussing the Runbaken Gauge and the 'Everlastic' Inner Tube. | 26th May 1923 | Box 1 \ 7 B001_X15 20 46 50 59-page166 | |
| Letter discussing the Runbaken gauge and the 'Everlastic' inner tube. | 28th May 1923 | Box 1 \ 7 B001_X15 20 46 50 59-page167 | |
| Potential use of American-made Mason tyres based on a customer's positive experience. | 25th Jun 1924 | Box 1 \ 7 B001_X15 20 46 50 59-page168 | |
| The potential disadvantages of Mason 'safety first' cord tyres due to their additional weight. | 26th Jun 1924 | Box 1 \ 7 B001_X15 20 46 50 59-page169 | |
| Page number '46' on a blank blue sheet. | 2nd Jun 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page170 | |
| Experiment No. 45 comparing a Marston radiator with the present R.R. standard. | 2nd Jun 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page171 | |
| Short test report on a radiator top tank, including temperature data and a final recommendation. | 7th Jun 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page172 | |
| Comparative testing and potential redesign of a Marston radiator. | 7th Jun 1913 | Box 1 \ 7 B001_X15 20 46 50 59-page173 | |
| Request for radiator tests, comparing a Marstons round tube honeycomb radiator against the standard Orme-Evans square tube version. | 26th Mar 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page174 | |
| Bumping test of a Marston round tube honeycomb radiator. | 27th Mar 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page175 | |
| The comparison and supply of Orme Evans and Marston radiators. | 29th Mar 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page176 | |
| The efficiency and strength of the Marston's round tube radiator. | 29th Mar 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page177 | |
| The bumping test results for a Marston round tube honeycomb radiator. | 30th Mar 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page178 | |
| Bumping test of a 20' x 44' Marston Zimmerman Radiator. | 1st May 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page179 | |
| Specifying a Zimmerman round tube type radiator with a steam separator top tank. | 3rd May 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page180 | |
| From F.H. Royce discussing the results of a bumping test on a Marston Zimmerman radiator. | 3rd May 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page181 | |
| Leaky radiators and the preference for the round tube Marston type while awaiting experiments. | 1st Dec 1937 | Box 1 \ 7 B001_X15 20 46 50 59-page182 | |
| Instruction for fitting a Marsden Zimmerman radiator to chassis 58 NA. | 25th May 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page183 | |
| Confirming a plan to test John Marston and Ferman radiators for use on a modified chassis. | 21th Jul 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page184 | |
| Standardization and testing of the Marston Honeycomb Radiator X.1298. | 5th Nov 1915 | Box 1 \ 7 B001_X15 20 46 50 59-page185 | |
| Technical discussion with Mr. Royce regarding improvements to radiator design for future cars. | 16th Dec 1918 | Box 1 \ 7 B001_X15 20 46 50 59-page186 | |
| Manufacturing process for a tank made of nickel silver. | 16th Dec 1918 | Box 1 \ 7 B001_X15 20 46 50 59-page187 | |
| The failure of a standard Marston Radiator during bumping tests. | 11th Aug 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page188 | |
| Requesting instructions for the return of a Marston Radiator to the makers after a bumping test. | 14th Aug 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page189 | |
| Instructing the Shipping Office to despatch one Marston Radiator per Order Office instructions. | 14th Aug 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page190 | |
| Returning a faulty radiator to the Marston Radiator Company and arranging for further testing. | 14th Aug 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page191 | |
| Component failure report listing issues with various parts like steering, radiator, and frame. | 18th Dec 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page192 | |
| Disputing the quality and additional costs for the black finish on Marston radiators. | 18th Dec 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page193 | |
| Complaint about the poor black paint finish on radiators from supplier John Marston Ltd. | 18th Dec 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page194 | |
| Comparison of an in-house radiator against a Marston radiator for the 40/50 chassis, detailing weight, construction, and performance. | 24th Dec 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page195 | |
| Troubles with third-party radiator manufacturers and plans for testing. | 24th Dec 1919 | Box 1 \ 7 B001_X15 20 46 50 59-page196 | |
| Blue page with the handwritten number 50. | 2nd Apr 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page197 | |
| Test log for Edison accumulators, noting charging, receipt, and testing dates. | 2nd Apr 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page198 | |
| Instruction card for the supply and testing of parts for Edison Batteries. | 23th May 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page199 | |
| Instructions for the supply and fitting of an Edison Battery Box and its components. | 11th Nov 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page200 | |
| Letter from F.H.R. discussing the procurement and testing of Edison versus lead cell accumulators. | 14th Nov 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page201 | |
| Desired qualities for batteries and a comment on American trade practices. | 18th Nov 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page202 | |
| Note regarding instructions for fitting 50 sets of Edison cells and 50 sets of lead cells to standard cars. | 22th Nov 1912 | Box 1 \ 7 B001_X15 20 46 50 59-page203 | |
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