| Description | Date | Identifier | |
| Complaint of a 40/50 HP engine overheating and potential solutions. | 7th Aug 1924 | Box 24 \ 4 Scan133 | |
| Experiments and modifications to address engine water boiling on long mountain passes. | 8th Aug 1924 | Box 24 \ 4 Scan134 | |
| Suggestion for using a glass disc to indicate the correct filling height for a matrix. | 2nd Aug 1924 | Box 24 \ 4 Scan135 | |
| Overheating complaints and loose spare wheels on the 20-HP Chassis from Switzerland. | 2nd Aug 1924 | Box 24 \ 4 Scan136 | |
| Complaints of water boiling on long mountain passes and potential issues with radiator design and placement. | 12th Aug 1924 | Box 24 \ 4 Scan137 | |
| Experiments to resolve issues with water boiling on long mountain passes. | 8th Aug 1924 | Box 24 \ 4 Scan138 | |
| Serious overheating complaint and proposed solutions for a customer's car. | 14th Aug 1924 | Box 24 \ 4 Scan139 | |
| Correspondence regarding water boiling issues on Chassis No. 16-IM and the fitting of a new, deeper radiator. | 12th Aug 1924 | Box 24 \ 4 Scan140 | |
| Letter discussing car performance in the Alps, the cost of a replacement radiator, and the effect of continental petrol quality on engine cooling. | 1st Aug 1924 | Box 24 \ 4 Scan141 | |
| Persistent overheating problems with 20-HP cars in Switzerland and potential solutions. | 14th Aug 1924 | Box 24 \ 4 Scan142 | |
| Overheating problems with 20-HP cars in Switzerland and the proposed investigation. | 13th Aug 1924 | Box 24 \ 4 Scan143 | |
| Arrangements for an official to conduct performance tests on cars, possibly in Italy. | 13th Aug 1924 | Box 24 \ 4 Scan144 | |
| Translated customer complaint letter regarding car overheating and a loose spare wheel. | 9th Aug 1924 | Box 24 \ 4 Scan145 | |
| Arrangements for an assistant, Mr. Hancock, to travel to Switzerland to investigate water boiling issues. | 1st Aug 1924 | Box 24 \ 4 Scan146 | |
| Inquiry about the progress of fitting a whistle to warn of boiling water due to customers forgetting to open radiator shutters. | 14th Aug 1924 | Box 24 \ 4 Scan147 | |
| Internal query regarding work done on a customer's 40/50 HP car to understand a recent improvement in an overheating issue. | 15th Aug 1924 | Box 24 \ 4 Scan148 | |
| Works Order for various parts for a customer named A. Schmidt Esq. in Geneva. | 15th Aug 1924 | Box 24 \ 4 Scan149 | |
| Modifications and addressing overheating concerns for a 40/50 Car (chassis 40-PG) belonging to Mr. Sidney. | 15th Aug 1924 | Box 24 \ 4 Scan150 | |
| Communication regarding water boiling troubles in Switzerland and the proposal to send an expert to investigate. | 15th Aug 1924 | Box 24 \ 4 Scan151 | |
| Letter addressing a customer complaint about a vehicle's water boiling troubles. | 15th Aug 1924 | Box 24 \ 4 Scan152 | |
| Arrangements for Mr. Hancock's visit to Switzerland, including passport collection and travel itinerary. | 8th Aug 1924 | Box 24 \ 4 Scan153 | |
| Inquiry regarding potential overheating difficulties with the 40/50 HP chassis fitted with front-wheel brakes during recent tests in France. | 15th Aug 1924 | Box 24 \ 4 Scan154 | |
| Disadvantages and doubtful advantage of fitting a warning whistle for water boiling. | 1st Aug 1924 | Box 24 \ 4 Scan155 | |
| Water boiling issues in a car in Switzerland and coordinating a client visit and repairs. | 16th Aug 1924 | Box 24 \ 4 Scan156 | |
| Overheating issues, associated reports, and planned tests. | 16th Aug 1924 | Box 24 \ 4 Scan157 | |
| Engine cooling system limitations and overheating issues on a 40/50 HP car during a trip in France. | 13th Aug 1924 | Box 24 \ 4 Scan158 | |
| Vehicle road tests focusing on engine cooling performance during continental mountain climbs and customer feedback on the issue. | 13th Aug 1924 | Box 24 \ 4 Scan159 | |
| Cooling issues with a 40/50 HP demonstration car and the explanation provided, being page 3 of a larger document. | 8th Apr 1924 | Box 24 \ 4 Scan160 | |
| Water boiling issues in 40/50 HP cars during 4-wheel brake tests in France. | 18th Aug 1924 | Box 24 \ 4 Scan161 | |
| Works order for booking out a 'Davis' Anemometer for A. Schmidt Esq. in Geneva. | 18th Aug 1924 | Box 24 \ 4 Scan162 | |
| Report from Geneva detailing car issues, including a chassis with a slack pivot pin and another with tight steering, complicated by a language barrier. | 19th Aug 1924 | Box 24 \ 4 Scan163 | |
| Urgent memo regarding customer complaints about water boiling troubles and arranging a visit. | 21th Aug 1924 | Box 24 \ 4 Scan164 | |
| Causes and potential solutions for engine water boiling in a 40/50 HP model. | 21th Aug 1924 | Box 24 \ 4 Scan165 | |
| Report discussing engine cooling issues, fan efficiency, radiator size, and comparisons with a Hispano. | 21th Aug 1924 | Box 24 \ 4 Scan166 | |
| Report page discussing engine cooling improvements, comparing radiator and bonnet designs to a 'Hispano' and considering changes to water circulation. | 22th Aug 1924 | Box 24 \ 4 Scan167 | |
| Letter regarding a customer complaint about 'boiling' and a proposal to test a new 40/50 HP car in Italy. | 22th Aug 1924 | Box 24 \ 4 Scan168 | |
| Letter detailing test results and customer complaints regarding overheating and other features on a 20 HP car. | 22th Aug 1924 | Box 24 \ 4 Scan169 | |
| Continued report detailing vehicle faults including oil leaks, transmission slack, poor brakes, and sticking radiator shutters. | 22th Aug 1924 | Box 24 \ 4 Scan170 | |
| Test results for a 20 HP car climbing the Col de la Faucille in Switzerland. | 22th Aug 1924 | Box 24 \ 4 Scan171 | |
| Continuation of a 20 HP car test report from Switzerland, detailing engine temperatures and performance data over time. | 30th May 1924 | Box 24 \ 4 Scan172 | |
| Test report on an Alfa-Romeo at Col-de-la-Faucille, including performance data and vehicle specifications. | 30th May 1924 | Box 24 \ 4 Scan173 | |
| Test results and data for a 20 'P' model vehicle climb up the Col de la Faucille in Switzerland. | 30th May 1924 | Box 24 \ 4 Scan174 | |
| Performance test data from a 20 HP vehicle during trials in Switzerland, continued from a previous test. | 22th Aug 1924 | Box 24 \ 4 Scan175 | |
| Letter detailing test results and owner complaints for a Reverdin Goshawk vehicle. | 22th Aug 1924 | Box 24 \ 4 Scan176 | |
| Letter discussing radiator shutter repairs and communication challenges while working abroad in France. | 22th Aug 1924 | Box 24 \ 4 Scan177 | |
| Test log sheet detailing performance data during a hill climb up the Col de la Faucille. | 22th Aug 1924 | Box 24 \ 4 Scan178 | |
| Performance log sheet for a Goshawk vehicle's hill climb test up the Col de la Faucille. | 22th Aug 1924 | Box 24 \ 4 Scan179 | |
| Overheating issues and customer complaints regarding Mr. Reverdin's 20 HP car. | 22th Aug 1924 | Box 24 \ 4 Scan180 | |
| Various vehicle faults including oil leaks, transmission slack, poor brakes, and sticking radiator shutters. | 22th Aug 1924 | Box 24 \ 4 Scan181 | |
| Test results of a 20 HP vehicle during a hill climb of the Col de la Faucille in Switzerland. | 22th Aug 1924 | Box 24 \ 4 Scan182 | |
| Continuation of a 20 HP vehicle performance test in Switzerland, detailing temperature and performance metrics over time. | 1st Aug 1924 | Box 24 \ 4 Scan183 | |
| Over-heating issues, tests in different weather conditions, and radiator modifications for various car models. | 1st Aug 1924 | Box 24 \ 4 Scan184 | |
| Continued memo regarding a new radiator design, its testing in Italy, and potential adoption for the 40/50 HP model. | 22th Aug 1924 | Box 24 \ 4 Scan185 | |
| Short memo from B.J. to By. and Hs. regarding cooling systems and enclosing another document. | 22th Aug 1924 | Box 24 \ 4 Scan186 | |
| Pros and cons of radiator and cooling system design for the 40/50 HP car. | 22th Aug 1924 | Box 24 \ 4 Scan187 | |
| Overheating potential of the 20 HP model compared to the 40/50 HP model. | 22th Aug 1924 | Box 24 \ 4 Scan188 | |
| Overheating issues with the 40/50 HP engines and a proposal to test an M.A.C.II car against a Hispano. | 22th Aug 1924 | Box 24 \ 4 Scan189 | |
| 'Water Boiling Troubles' and the status of an engineer sent to Switzerland. | 22th Aug 1924 | Box 24 \ 4 Scan190 | |
| Technician's visit to Geneva to investigate water boiling troubles, which were untestable due to cold weather. | 1st Aug 1924 | Box 24 \ 4 Scan191 | |
| Correspondence regarding radiator test procedures and logistics for a 20 HP car. | 25th Aug 1924 | Box 24 \ 4 Scan192 | |
| Effectiveness of the radiator fan for cooling on 40/50 HP and 20 HP chassis. | 25th Aug 1924 | Box 24 \ 4 Scan193 | |
| Report discussing engine cooling, radiator airflow, and bonnet ventilation at various speeds and conditions. | 25th Aug 1924 | Box 24 \ 4 Scan194 | |
| Report comparing the cooling systems and overheating issues of the 20 HP and 40/50 HP models, including notes on driver habits. | 25th Aug 1924 | Box 24 \ 4 Scan195 | |
| Investigating boiling troubles through radiator tests on a 40/50 HP car. | 1st Aug 1924 | Box 24 \ 4 Scan196 | |
| Page discussing the heat flow to the jacket water of a test bed engine under full load. | 1st Aug 1924 | Box 24 \ 4 Scan197 | |
| Data table showing results from radiator tests on a 40/50 HP engine. | 25th Aug 1924 | Box 24 \ 4 Scan198 | |
| Graph comparing radiator temperatures of a Rolls-Royce 40/50 and a Hispano-Suiza during a full-throttle hill climb test. | 25th Aug 1924 | Box 24 \ 4 Scan199 | |
| Blank document page with a red 'Print Room' stamp. | 26th Aug 1924 | Box 24 \ 4 Scan200 | |
| Graph showing comparative cooling tests between a Rolls Royce 40/50 and a Hispano Suiza vehicle at an average speed of 35 mph. | 26th Aug 1924 | Box 24 \ 4 Scan201 | |
| Series of graphs showing radiator performance tests on a 40/50 HP car, measuring heat dissipation and various temperatures under stationary conditions. | 26th May 1931 | Box 24 \ 4 Scan202 | |
| Blank page with a red ink stamp indicating receipt by the Print Room. | 26th Aug 1924 | Box 24 \ 4 Scan203 | |
| Testing an overheating car in Southern Europe, including experiments with different bonnets. | 1st Aug 1924 | Box 24 \ 4 Scan204 | |
| Telegram from Hancock in Geneva to Hives in Derby updating on the status of 40-50 model tests. | 27th Aug 1916 | Box 24 \ 4 Scan205 | |
| Letter discussing the choice between fitting shutters or louvres for a car, including observations on cooling effectiveness and wind velocity. | 27th Aug 1924 | Box 24 \ 4 Scan206 | |
| Letter detailing challenges with car temperature testing, including logistical issues and interactions with other car owners. | 27th Aug 1924 | Box 24 \ 4 Scan207 | |
| Vehicle testing progress, detailing weather-related delays, a wired update, and issues with local petrol quality. | 27th Aug 1924 | Box 24 \ 4 Scan208 | |
| Letter discussing the fitting of shutters versus louvres and cooling modifications on a car. | 27th Aug 1924 | Box 24 \ 4 Scan209 | |
| Challenges and results of hill climb performance tests conducted in France. | 27th Aug 1924 | Box 24 \ 4 Scan210 | |
| Vehicle testing progress, covering modifications, weather challenges, test adjustments, and fuel quality. | 26th Mar 1924 | Box 24 \ 4 Scan211 | |
| Radiator boiling tests conducted on the Col-de-la-Faucille for chassis 83EE. | 26th Mar 1924 | Box 24 \ 4 Scan212 | |
| Test log sheet for Chassis 83EE during a hill climb on the Col-de-la-Faucille route. | 26th Aug 1924 | Box 24 \ 4 Scan213 | |
| Performance test log for chassis 83EE on the Col de les Faucille hill climb. | 20th Mar 1924 | Box 24 \ 4 Scan214 | |
| Test log sheet for chassis 83EE during a climb of the Col de la Faucille. | 26th Aug 1924 | Box 24 \ 4 Scan215 | |
| Performance and temperature log for chassis 83EE during a hill climb test on Col de la Faucille. | 26th May 1924 | Box 24 \ 4 Scan216 | |
| Secret memorandum discussing improvements to car radiators and fans for the 20 HP and 40/50 HP models. | 29th Aug 1924 | Box 24 \ 4 Scan217 | |
| Engine overheating issues and potential solutions related to fans, radiators, and bonnets. | 29th Aug 1924 | Box 24 \ 4 Scan218 | |
| Letter providing instructions on managing customer expectations during field testing to address boiling troubles. | 29th Aug 1924 | Box 24 \ 4 Scan219 | |
| Continued memorandum instructing an individual to visit Mr. Schley in France regarding an issue with boiling before returning to Derby. | 1st Sep 1923 | Box 24 \ 4 Scan220 | |
| Telegram from Hancock to Hives regarding travel arrangements from Geneva to Grasse. | 1st Sep 1923 | Box 24 \ 4 Scan221 | |
| Secret memorandum discussing the causes of water boiling in engines and potential solutions like radiator size and bonnet design. | 2nd Sep 1924 | Box 24 \ 4 Scan222 | |
| Vehicle inspection and performance test of a Landaulet in Grasse, France. | 3rd Sep 1924 | Box 24 \ 4 Scan223 | |
| Engine boiling and piston knock issues experienced during a hill climb. | 20th Jun 1925 | Box 24 \ 4 Scan224 | |
| Customer advice on preventing vehicle overheating. | 3rd Sep 1924 | Box 24 \ 4 Scan225 | |
| Visit to Grasse to inspect and test Mrs Schley's car, chassis 60PK. | 3rd Sep 1924 | Box 24 \ 4 Scan226 | |
| Engine overheating issue causing compression loss and a standstill, with suggestions for remedy. | 30th Sep 1936 | Box 24 \ 4 Scan227 | |
| Post Office Telegraph confirming arrival in London. | 30th Sep 1936 | Box 24 \ 4 Scan228 | |
| Engine over-heating and the difference in heat transfer to water between high and low compression engines. | 1st Sep 1924 | Box 24 \ 4 Scan229 | |
| The relative amounts of heat rejected to cooling water based on engine compression ratios. | 1st Sep 1924 | Box 24 \ 4 Scan230 | |
| Comparing the combustion chamber, cooling, and petrol consumption of an E.A.C. car against the 40/50 HP model. | 12th Jul 1928 | Box 24 \ 4 Scan231 | |
| Radiator and road spring tests in France on a 40/50 HP car. | 1st Sep 1924 | Box 24 \ 4 Scan232 | |
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