| Description | Date | Identifier | |
| Radiator obstruction, specifically in the top row of tubes, and the electrolytic action of aluminium heads. | 30th Aug 1929 | Box 24 \ 5 Scan206 | |
| Tests for radiator water loss, determining the optimal outlet pipe restriction without impairing cooling. | 10th Jan 1930 | Box 24 \ 5 Scan207 | |
| Results of tests on water pump cavitation for radiators. | 10th Jan 1930 | Box 24 \ 5 Scan208 | |
| Analysis of pump cavitation, hydraulic restriction, and water flow limitations in a radiator. | 10th Jan 1930 | Box 24 \ 5 Scan209 | |
| The performance and hydraulic resistance of various radiator and cooling systems. | 10th Jan 1930 | Box 24 \ 5 Scan210 | |
| Engine cooling system phenomena, including radiator circulation, back pressure, and top tank capacity. | 10th Jan 1930 | Box 24 \ 5 Scan211 | |
| Summary of results regarding radiator design, cavitation, and cooling system improvements, including a comparison with Chrysler. | 10th Jan 1930 | Box 24 \ 5 Scan212 | |
| Comparison table of radiator specifications including dimensions, hydraulic resistance, and weight. | 13th Jan 1930 | Box 24 \ 5 Scan213 | |
| Tests on the Phantom II water cooling system to determine the effects of temperature and restriction. | 13th Jan 1930 | Box 24 \ 5 Scan214 | |
| The effects of cavitation and pressure within a fluid system due to restrictions. | 13th Jan 1930 | Box 24 \ 5 Scan215 | |
| Graph showing the effects of temperature and restriction on water flow and suction side depression for the Phantom II cooling system. | 13th Jan 1933 | Box 24 \ 5 Scan216 | |
| Graph showing pressure versus engine RPM in the Phantom II cooling system with different nozzle and valve configurations. | 13th Jan 1934 | Box 24 \ 5 Scan217 | |
| Graph showing water flow and suction side depression for the Phantom II cooling system. | 30th Jan 1931 | Box 24 \ 5 Scan218 | |
| Graph showing the effect of temperature and a restricted delivery nozzle on water flow versus engine RPM for a Phantom II cooling system. | 2nd Jan 1934 | Box 24 \ 5 Scan219 | |
| Radiator corrosion and experiments with Ethylene Glycol as an anti-freezing compound in Phantom II cars. | 25th Feb 1930 | Box 24 \ 5 Scan220 | |
| Request to fabricate a bottom water pipe with a thermometer adaptor for the Phantom 11 left-hand engine. | 11th Jun 1930 | Box 24 \ 5 Scan221 | |
| Temperature tests at Brooklands detailing insufficient radiator cooling and petrol supply starvation issues. | 11th Jun 1930 | Box 24 \ 5 Scan222 | |
| Acceleration tests comparing a standard carburetter with one fitted with an air silencer. | 4th Jun 1930 | Box 24 \ 5 Scan223 | |
| Steering tests conducted at Brooklands with different tyre types and pressures. | 4th Jun 1930 | Box 24 \ 5 Scan224 | |
| Tyre performance and steering characteristics at various pressures and vehicle configurations. | 4th Jun 1930 | Box 24 \ 5 Scan225 | |
| Log sheet recording temperature and performance data during vehicle test laps under various conditions. | 4th Jun 1930 | Box 24 \ 5 Scan226 | |
| Test report logging lap times, various temperatures, and oil pressure under different vehicle conditions. | 13th Jun 1930 | Box 24 \ 5 Scan227 | |
| Request for a louvered bonnet and standard shutters for the 19-EX car for cooling tests at Brooklands. | 13th Jun 1930 | Box 24 \ 5 Scan228 | |
| Arrangement to purchase 100 tickets for the Brooklands Automobile Racing Club track. | 17th Jun 1930 | Box 24 \ 5 Scan229 | |
| Tickets and garage availability at Brooklands Motor Course. | 23th Jun 1930 | Box 24 \ 5 Scan230 | |
| Brooklands tests of the 19-EX car's cooling system, prompted by issues with the Phantom II model. | 25th Jun 1930 | Box 24 \ 5 Scan231 | |
| Cooling system ventilation tests, comparing the effects of undershields and bonnet shutters on a Phantom II. | 25th Jun 1930 | Box 24 \ 5 Scan232 | |
| Engine cooling tests, focusing on the need for ventilated bonnets, radiator performance, and comparisons between different car models. | 25th Jun 1930 | Box 24 \ 5 Scan233 | |
| Performance issues including overheating, fuel supply, and lap speeds during car testing. | 25th Jun 1930 | Box 24 \ 5 Scan234 | |
| Test report on the performance of experimental cars, identifying reasons for inferior speed and the effects of bonnet ventilation. | 25th Jun 1930 | Box 24 \ 5 Scan235 | |
| Engine cooling system tests, including radiator temperature, water circulation, and the American Phantom II. | 25th Jun 1930 | Box 24 \ 5 Scan236 | |
| Summary of findings on bonnet ventilation, fan efficiency, and radiator design for the Phantom II. | 25th Jun 1930 | Box 24 \ 5 Scan237 | |
| Need for ventilated and louvred bonnets for cars driven at high speeds on the Continent and in England. | 25th Jun 1930 | Box 24 \ 5 Scan238 | |
| Graph showing water and oil temperatures plotted against miles run during a vehicle test. | 2nd Jul 1938 | Box 24 \ 5 Scan239 | |
| Blank document page with a purple ink stamp in the bottom right corner. | 2nd Jul 1938 | Box 24 \ 5 Scan240 | |
| Graph showing the ambient temperature at which a Standard PII Cabriolet will overheat under various ventilation conditions. | 2nd Jul 1938 | Box 24 \ 5 Scan241 | |
| Graph showing the effect of different cooling configurations on engine water temperature. | 2nd Jul 1938 | Box 24 \ 5 Scan242 | |
| Graph plotting oil and water temperatures against miles run under varying speed and ventilation conditions. | 2nd Jul 1938 | Box 24 \ 5 Scan243 | |
| Bar chart comparing critical air temperatures for spring tensioned versus positively tensioned fan belts. | 2nd Jul 1938 | Box 24 \ 5 Scan244 | |
| Graph comparing the top water temperature of two engine models, 19 EX and 18 EX, over a test run. | 2nd Jul 1938 | Box 24 \ 5 Scan245 | |
| Blueprint showing a modification to the front undershield to improve the cooling system. | 2nd Jul 1930 | Box 24 \ 5 Scan246 | |
| Blank document page with a purple ink stamp in the bottom right corner. | 2nd Jul 1930 | Box 24 \ 5 Scan247 | |
| Summary of circulation figures for the Phantom II engine, detailing performance under various conditions and tests. | 1st Jul 1930 | Box 24 \ 5 Scan248 | |
| Two graphs comparing engine coolant flow rates in Gallons/Min against Engine RPM for different system configurations. | 6th Jul 1944 | Box 24 \ 5 Scan249 | |
| Blank page with a Print Room stamp. | 1st Jul 1930 | Box 24 \ 5 Scan250 | |
| Two graphs comparing left and right-hand engine delivery, and venturi readings versus actual measurements. | 1st Jul 1930 | Box 24 \ 5 Scan251 | |
| Water circulation test results comparing pump delivery against water temperature for different radiator configurations. | 1st Jul 1930 | Box 24 \ 5 Scan252 | |
| Otherwise blank document page with a receiving stamp from the Derby office. | 1st Jul 1930 | Box 24 \ 5 Scan253 | |
| Recommendations to resolve a customer's overheating issue by adjusting the fan and fan belt. | 1st Jul 1930 | Box 24 \ 5 Scan254 | |
| Page discussing the effect of fan position on over-heating. | 7th Jul 1930 | Box 24 \ 5 Scan255 | |
| Letter addressing a car's overheating problem and suggesting potential solutions. | 7th Jul 1930 | Box 24 \ 5 Scan256 | |
| Proposal for conducting comparative overheating tests against other car makes, including a Maybach and American models, at Brooklands Track. | 8th Jul 1930 | Box 24 \ 5 Scan257 | |
| Second report on Brooklands radiator tests, detailing issues with the fuel supply and autovac system. | 9th Jul 1930 | Box 24 \ 5 Scan258 | |
| Carburetter air intake temperatures and their effect on fuel supply efficiency and overheating. | 9th Jul 1930 | Box 24 \ 5 Scan259 | |
| The performance of the cooling system fan and issues with mixture strength at high speeds. | 9th Jul 1930 | Box 24 \ 5 Scan260 | |
| Resolving pre-ignition and over-heating, comparing radiator matrixes and bottom outlets. | 9th Jul 1930 | Box 24 \ 5 Scan261 | |
| Engine cooling system circulation and water temperature tests at speed. | 9th Jul 1930 | Box 24 \ 5 Scan262 | |
| Vehicle overheating, discussing factors such as fan efficiency, ambient temperature, and the cooling system's performance. | 9th Jul 1930 | Box 24 \ 5 Scan263 | |
| Recommendations for improvements to the fan belt, autovac, and cooling system, with test proposals for the Phantom II. | 9th Jul 1930 | Box 24 \ 5 Scan264 | |
| Graph and bar chart analysing the performance of a vehicle's cooling system under various fan, speed, and ventilation conditions. | 2nd Jul 1930 | Box 24 \ 5 Scan265 | |
| Blank document page with a Derby date stamp. | 12th Jul 1930 | Box 24 \ 5 Scan266 | |
| Blueprint with graphs detailing the effect of water circulation on overheating in a PII water system for a 19 Ex. car. | 2nd Jul 1930 | Box 24 \ 5 Scan267 | |
| Line graph plotting top and bottom water temperatures against seven different test configurations for a car at Brooklands. | 2nd Jul 1930 | Box 24 \ 5 Scan268 | |
| Graph showing the effect of bottom water temperature on complete car circulation and pump suction depression at a constant engine speed. | 12th Jul 1930 | Box 24 \ 5 Scan269 | |
| The reverse side of a document, marked with a 'Print Room' date stamp. | 12th Jul 1930 | Box 24 \ 5 Scan270 | |
| Phantom cooling tests at Brooklands, considering radiator modifications and comparing performance with other cars. | 1st Jul 1930 | Box 24 \ 5 Scan271 | |
| Potential modifications for increased cooling for the 25 HP and 45 HP models. | 4th Jul 1930 | Box 24 \ 5 Scan272 | |
| Engine cooling issues, fan performance tests at Brooklands, and proposed fan belt redesigns. | 9th Jul 1930 | Box 24 \ 5 Scan273 | |
| Car cooling system performance, temperature readings, and requests for further testing. | 9th Jul 1930 | Box 24 \ 5 Scan274 | |
| Typed letter discussing car overheating, brake linings, and cooling system performance. | 9th Jul 1930 | Box 24 \ 5 Scan275 | |
| Typed memo discussing atmospheric temperatures and centre point lubrication. | 9th Jul 1930 | Box 24 \ 5 Scan276 | |
| Results and future plans for cooling tests on 25 HP and 40/50 HP engines, including the Phantom II. | 1st Jul 1930 | Box 24 \ 5 Scan277 | |
| Testing a square tube radiator and arranging on-track comparisons with other vehicles. | 1st Jul 1930 | Box 24 \ 5 Scan278 | |
| Schedule of radiator tests for car 19-EX at Brooklands. | 10th Jul 1930 | Box 24 \ 5 Scan279 | |
| Optimal size of radiator tubes for engine cooling and carburetter performance. | 14th Jul 1930 | Box 24 \ 5 Scan280 | |
| Recurring water loss and high temperature issues during a 10,000-mile test of car 24-EX in France. | 17th Jul 1930 | Box 24 \ 5 Scan281 | |
| Third report on Brooklands tests comparing the cooling of the Phantom II against other cars. | 22th Jul 1930 | Box 24 \ 5 Scan282 | |
| Test report on a 5-passenger closed sedan detailing its cooling, speedometer, acceleration, and a subsequent engine failure. | 22th Jul 1930 | Box 24 \ 5 Scan283 | |
| Test report page detailing performance issues of a vehicle's engine, suspension, steering, and brakes. | 22th Jul 1930 | Box 24 \ 5 Scan284 | |
| Performance and comparison report on a Pierce Arrow 6-cylinder sedan. | 22th Jul 1930 | Box 24 \ 5 Scan285 | |
| Performance and handling review of a Pierce-Arrow car, continuing from a previous page. | 22th Jul 1930 | Box 24 \ 5 Scan286 | |
| The cooling performance tests of a 1927 Hispano-Suiza Coupe, comparing it to a Phantom II. | 22th Jul 1930 | Box 24 \ 5 Scan287 | |
| Performance comparison report between a Hispano-Suiza car and a Rolls-Royce Phantom II, focusing on radiator/fan efficiency and acceleration. | 22th Jul 1930 | Box 24 \ 5 Scan288 | |
| Technical report on the testing and comparison of a 6-cylinder Graham Paige car. | 22th Jul 1930 | Box 24 \ 5 Scan289 | |
| Performance and engine smoothness analysis of a Graham Paige car, with comparisons to other contemporary vehicles. | 22th Jul 1930 | Box 24 \ 5 Scan290 | |
| Page 3 of a comparative analysis of a Graham-Paige car's mechanical components. | 22th Jan 1932 | Box 24 \ 5 Scan291 | |
| Summary of comparative tests on engine cooling, comparing ventilated bonnets against Hispano-Suiza and American cars. | 22th Jul 1930 | Box 24 \ 5 Scan292 | |
| Comparison of engine performance and other features against a Graham Paige car. | 22th Jul 1930 | Box 24 \ 5 Scan293 | |
| Comparative table of specifications and performance data for various car models. | 23th Jul 1930 | Box 24 \ 5 Scan294 | |
| Blank document page with a 'Print Room' date stamp from Derby. | 23th Jul 1930 | Box 24 \ 5 Scan295 | |
| Extract from a report regarding a chart of water and air temperatures taken during a 250-mile car run. | 23th Jul 1930 | Box 24 \ 5 Scan296 | |
| Graph of water and air temperature readings taken every 50 miles over several days. | 13th Jul 1930 | Box 24 \ 5 Scan297 | |
| Blank page with a date stamp in the bottom right corner. | 23th Jul 1930 | Box 24 \ 5 Scan298 | |
| Radiator tests on the Montlhery Track with car 24-EX, confirming results from Brooklands. | 23th Jul 1930 | Box 24 \ 5 Scan299 | |
| Schedule of 18 performance and cooling system tests conducted on the Montlhery track. | 17th Jul 1930 | Box 24 \ 5 Scan300 | |
| Series of tests measuring water loss and temperatures at various speeds and conditions. | 18th Jul 1930 | Box 24 \ 5 Scan301 | |
| Engine temperature test results under various bonnet shutter and ignition settings. | 18th Jul 1930 | Box 24 \ 5 Scan302 | |
| Series of cooling system performance tests measuring water, oil, and air temperatures under various conditions. | 17th Jul 1930 | Box 24 \ 5 Scan303 | |
| Page of test results measuring water, oil, and air temperatures under various conditions, including different fuel mixtures and ignition settings. | 17th Jul 1930 | Box 24 \ 5 Scan304 | |
| Procedure for diagnosing and rectifying complaints of overheating cooling water. | 1st Aug 1930 | Box 24 \ 5 Scan305 | |
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