| Description | Date | Identifier | |
| Modifications to the radiator, bonnet, pistons, and pivot pin bushes. | 10th Sep 1924 | Box 24 \ 4 Scan233 | |
| Issues with braking, shock absorbers, and the selection of road springs for a car. | 10th Sep 1924 | Box 24 \ 4 Scan234 | |
| Sending Woodhead springs to France for testing on cars 9-FK and 98-NK. | 10th Sep 1924 | Box 24 \ 4 Scan235 | |
| Tests conducted on 40/50 HP radiators to alleviate boiling issues. | 11th Sep 1924 | Box 24 \ 4 Scan236 | |
| Engine fan efficiency, power consumption, and fan belt limitations at high speeds. | 21th Sep 1924 | Box 24 \ 4 Scan237 | |
| Fan drive improvements and bonnet ventilation to reduce boiling. | 11th Sep 1924 | Box 24 \ 4 Scan238 | |
| Engine cooling improvements and the effects of engine boiling. | 11th Sep 1924 | Box 24 \ 4 Scan239 | |
| Statement on the acceptable duration a 20 HP or 40/50 HP car can run while boiling. | 1st Sep 1924 | Box 24 \ 4 Scan240 | |
| Requesting a report on a visit concerning water boiling troubles with chassis 60-PK. | 12th Sep 1924 | Box 24 \ 4 Scan241 | |
| From CJ to Hs regarding engine overheating issues observed during the Austrian Trials, with a proposed solution. | 12th Sep 1924 | Box 24 \ 4 Scan242 | |
| Congratulatory memo from CJ to Hs on a discovery related to the heating of water. | 1st Sep 1924 | Box 24 \ 4 Scan243 | |
| Potential improvements to the engine cooling system, specifically the fan belt and bonnet louvres. | 1st Sep 1924 | Box 24 \ 4 Scan244 | |
| Improvements to the engine cooling system, including radiator size, fan efficiency, and air exits. | 13th Sep 1924 | Box 24 \ 4 Scan245 | |
| Covering letter for a report on car 60-PK overheating when climbing a hill. | 15th Sep 1924 | Box 24 \ 4 Scan246 | |
| The inspection and road test of chassis 60.PK due to overheating issues in mountainous terrain in France. | 3rd Sep 1924 | Box 24 \ 4 Scan247 | |
| Typed report discussing vehicle performance issues, including piston knock and engine boiling during a hill climb. | 6th Sep 1924 | Box 24 \ 4 Scan248 | |
| Car overheating, referencing the 1913 Austrian Trials and potential radiator modifications. | 6th Sep 1924 | Box 24 \ 4 Scan249 | |
| Alleviating engine boiling on a 40/50 HP car by changing into a lower gear. | 1st Sep 1924 | Box 24 \ 4 Scan250 | |
| Alleviating engine boiling troubles by hill climbing on indirect gears. | 8th Sep 1924 | Box 24 \ 4 Scan251 | |
| Engine cooling performance in relation to gear selection and fan speed. | 18th Sep 1924 | Box 24 \ 4 Scan252 | |
| Gear selection, radiator performance, and fan belt tension during a hill climb test. | 9th Sep 1924 | Box 24 \ 4 Scan253 | |
| Graphs showing radiator temperature performance during hill climb tests at Cat and Fiddle Hill. | 16th Sep 1924 | Box 24 \ 4 Scan254 | |
| Guidance on how to respond to Mr. Nicholls regarding a delayed report for Chassis No. 60.PK. | 23th Sep 1924 | Box 24 \ 4 Scan255 | |
| Expected boiling troubles with Chassis No. 60-PK (Schley). | 24th Sep 1924 | Box 24 \ 4 Scan256 | |
| Parcel containing testing equipment delivered to the Experimental Department. | 25th Sep 1924 | Box 24 \ 4 Scan257 | |
| Methods for condensing steam in engine cooling systems and comparing them to American approaches. | 29th Sep 1924 | Box 24 \ 4 Scan258 | |
| Outlining suggestions on engine cooling, detailing the advantages of steam cooling and the results of a trial on a 40/50 HP car. | 30th Sep 1924 | Box 24 \ 4 Scan259 | |
| Engine over-heating issues, condenser tanks, and pressurized cooling systems. | 14th Sep 1925 | Box 24 \ 4 Scan260 | |
| Test report on a pressurized radiator system to prevent boiling above 100°C. | 14th Sep 1923 | Box 24 \ 4 Scan261 | |
| Test results showing boiling points at different pressures and engine temperature/pressure at various speeds. | 14th Sep 1923 | Box 24 \ 4 Scan262 | |
| Road test results for engine cooling performance on a hill climb with varying release valve pressures. | 8th Oct 1924 | Box 24 \ 4 Scan263 | |
| Overheating issues with Chassis No. 49-AE for Mr. Hurliman. | 8th Oct 1924 | Box 24 \ 4 Scan264 | |
| Letter concerning an overheating complaint on Chassis No. 49-AE for a client in Zurich. | 6th Oct 1924 | Box 24 \ 4 Scan265 | |
| Letter to a customer regarding issues with their car's wiring and cooling system. | 6th Oct 1924 | Box 24 \ 4 Scan266 | |
| Letter responding to a customer's complaints about their car and the cooling system. | 8th Oct 1924 | Box 24 \ 4 Scan267 | |
| Customer complaint letter regarding electrical and overheating issues with chassis No. 49-AE. | 3rd Oct 1924 | Box 24 \ 4 Scan268 | |
| Follow-up letter regarding a customer's overheating issues for chassis 49-AE. | 13th Oct 1924 | Box 24 \ 4 Scan269 | |
| Urgent complaint regarding overheating for Chassis No. 3-KG, owned by I. de Pedraza. | 22th Oct 1924 | Box 24 \ 4 Scan270 | |
| Potential solutions for an overheating complaint regarding chassis 3-KG. | 23th Oct 1924 | Box 24 \ 4 Scan271 | |
| Engine overheating in the 40/50 HP model and proposing a test with and without a thermostat. | 14th Nov 1924 | Box 24 \ 4 Scan272 | |
| Thermostat-related overheating problems in the 40/50 HP model and proposing tests. | 12th Nov 1924 | Box 24 \ 4 Scan273 | |
| Requesting the urgent dispatch of parts for chassis GAK.65 to prevent recurring water boiling issues for the owner, Mr. Gerald Mere. | 15th Nov 1924 | Box 24 \ 4 Scan274 | |
| Fitting a modified propeller shaft to car G.A.K. 65 to fix oil leaks and water boiling problems. | 17th Nov 1924 | Box 24 \ 4 Scan275 | |
| The effect of removing the thermostat on 40/50 HP engine overheating issues. | 21th Nov 1924 | Box 24 \ 4 Scan276 | |
| The modification of test results based on further testing. | 21th Nov 1924 | Box 24 \ 4 Scan277 | |
| The difficulties of on-road cooling system tests and the development of new methods for comparing radiator efficiency. | 21th Nov 1924 | Box 24 \ 4 Scan278 | |
| Analysis of engine cooling curves and factors affecting heat transfer based on Newton's Law of Cooling. | 21th Nov 1924 | Box 24 \ 4 Scan279 | |
| Description of radiator cooling testing methods based on Newton's Law, including 'Method 'B''. | 21th Nov 1924 | Box 24 \ 4 Scan280 | |
| Table outlining the atmospheric temperatures at which car engines will boil with different radiator systems and cooling configurations. | 21th Nov 1924 | Box 24 \ 4 Scan281 | |
| Test report detailing radiator performance under various conditions using Method 'B'. | 21th Nov 1924 | Box 24 \ 4 Scan282 | |
| Comparison of cooling system performance with different radiator matrices and alterations. | 21th Nov 1924 | Box 24 \ 4 Scan283 | |
| Analysis of fan value, mixture strength, and radiator capabilities of Hispano and 40/50 HP models at varying speeds. | 21th Nov 1924 | Box 24 \ 4 Scan284 | |
| Results of radiator tests using 'Method A' to compare different matrix sizes and configurations. | 21th Nov 1924 | Box 24 \ 4 Scan285 | |
| Radiator efficiency tests and methods for determining cooling system performance. | 21th Nov 1924 | Box 24 \ 4 Scan286 | |
| Page from a report concluding that readings obtained by method 'B' are more probably correct. | 21th Nov 1924 | Box 24 \ 4 Scan287 | |
| Graph of cooling curves comparing performance with shutters open versus fan off at 30 M.P.H. | 26th Nov 1924 | Box 24 \ 4 Scan288 | |
| Blank reverse side of a document with a date stamp from Derby. | 26th Nov 1924 | Box 24 \ 4 Scan289 | |
| Graph plotting logarithmic temperature against distance and time to compare cooling performance with various fan, shutter, and louvre configurations. | 26th Nov 1924 | Box 24 \ 4 Scan290 | |
| Graph demonstrating the consistency of radiator temperature readings over distance travelled using a towing method. | 26th Nov 1924 | Box 24 \ 4 Scan291 | |
| Graph comparing the cooling performance of a large radiator at 20 M.P.H. under 'No Fan', 'Standard', 'Louvres', and 'Shutters' configurations. | 28th Nov 1924 | Box 24 \ 4 Scan292 | |
| Blank page with a received stamp from the Print Room. | 28th Nov 1924 | Box 24 \ 4 Scan293 | |
| Investigations into vehicle cooling systems and radiator tests. | 28th Nov 1924 | Box 24 \ 4 Scan294 | |
| Summary discussing engine overheating issues at low speeds and radiator performance. | 28th Nov 1924 | Box 24 \ 4 Scan295 | |
| Methods for comparing radiator cooling efficiencies. | 25th Nov 1924 | Box 24 \ 4 Scan296 | |
| Radiator cooling efficiency and heat dissipation, applying Newton's Law of Cooling. | 25th Nov 1924 | Box 24 \ 4 Scan297 | |
| The methodology for testing radiator cooling efficiency under load. | 25th Nov 1924 | Box 24 \ 4 Scan298 | |
| Summarizing radiator performance results based on matrix height and ventilation improvements. | 25th Nov 1924 | Box 24 \ 4 Scan299 | |
| The 40/50 HP cooling system, comparing its efficiency against a Hispano model. | 25th Nov 1924 | Box 24 \ 4 Scan300 | |
| Comparing the cooling performance of the Hispano and 40/50 HP engines at 20 M.P.H. | 25th Nov 1924 | Box 24 \ 4 Scan301 | |
| Comparing the merits of Hispano and 40/50 type radiator matrices. | 25th Nov 1924 | Box 24 \ 4 Scan302 | |
| Recommendations to reduce engine over-heating. | 25th Nov 1924 | Box 24 \ 4 Scan303 | |
| Table comparing cooling matrix performance with varying heights and depths at a road speed of 30 mph. | 25th Nov 1924 | Box 24 \ 4 Scan304 | |
| Table detailing the value of various types of bonnet ventilation on a '20/4' matrix at 30 and 40 M.P.H. | 25th Nov 1924 | Box 24 \ 4 Scan305 | |
| Comparative analysis of cooling performance between Hispano and 40/50 fans and systems. | 25th Nov 1924 | Box 24 \ 4 Scan306 | |
| Test results for the 40/50 HP cooling system efficiency at various speeds, configurations, and mixture strengths. | 23th Dec 1924 | Box 24 \ 4 Scan307 | |
| Cover letter regarding Experimental Report 766 on the cooling of the 40/50, attaching a related document. | 23th Dec 1924 | Box 24 \ 4 Scan308 | |
| Letter responding to an experimental report on 40/50 cooling, with suggestions on radiator height and driver visibility. | 15th Dec 1924 | Box 24 \ 4 Scan309 | |
| Proposed improvements for bonnet shutters, undersheets, and engine cooling systems. | 15th Dec 1924 | Box 24 \ 4 Scan310 | |
| Solutions for the 40/50 model's water boiling issue, including a new fan and bonnet design. | 31th Dec 1924 | Box 24 \ 4 Scan311 | |
| Engine cooling improvements to prevent water boiling, proposing a new fan and advocating for louvres over shutters. | 31th Dec 1924 | Box 24 \ 4 Scan312 | |
| Policy for fitting louvred bonnets on 20 HP & 40/50 HP chassis for improved cooling. | 8th Jan 1925 | Box 24 \ 4 Scan313 | |
| Remedy for customer complaints about water boiling and tests on improved fan efficiency. | 21th Jan 1925 | Box 24 \ 4 Scan314 | |
| Road tests for the cooling of an EAC engine radiator. | 3rd Mar 1925 | Box 24 \ 4 Scan315 | |
| The cooling efficiency and water pump delivery, comparing a new broad-bladed fan with the original narrow-bladed fan. | 25th Sep 1924 | Box 24 \ 4 Scan316 | |
| Comparing water temperatures and water pump delivery between EAC 'V' series and 40/50 cars. | 3rd Mar 1925 | Box 24 \ 4 Scan317 | |
| Bar chart comparing the cooling efficiencies of 'E.A.C. V Series' and '40/50 2 1/4' Matrix' systems at different speeds. | 26th Mar 1925 | Box 24 \ 4 Scan318 | |
| Blank document page with a Print Room receiving stamp. | 31th Mar 1925 | Box 24 \ 4 Scan319 | |
| Graph comparing the Thrust and Power versus Engine Speed for a standard 40/50 6-bladed fan and an experimental E.A.C. fan. | 25th Mar 1925 | Box 24 \ 4 Scan320 | |
| Heavily faded document, possibly a cover sheet, with a red receiving stamp in the bottom right corner. | 31th Mar 1925 | Box 24 \ 4 Scan321 | |
| Bar chart comparing the atmospheric temperature at which a car will boil under various cooling and ventilation configurations. | 25th Nov 1924 | Box 24 \ 4 Scan322 | |
| Report in The Autocar of a 40/50 HP car boiling, attributing the issue to a non-standard blanking plate fitted to the radiator. | 10th Dec 1924 | Box 24 \ 4 Scan323 | |
| Results of cooling system investigations and recommendations for managing overheating. | 10th Dec 1924 | Box 24 \ 4 Scan324 | |
| Page discussing engine cooling performance, local heating when stopped, and a test of a 40/50 HP car with a 2 3/4 inch radiator matrix. | 9th Dec 1924 | Box 24 \ 4 Scan325 | |
| Secret internal memo discussing urgent cooling system investigations and required alterations for new and existing cars to prevent overheating. | 9th Dec 1924 | Box 24 \ 4 Scan326 | |
| Engine cooling issues and radiator design compromises due to sales department feedback. | 13th Dec 1924 | Box 24 \ 4 Scan327 | |
| Overheating and water boiling trouble on a 40/50 HP car in Australia. | 9th Feb 1925 | Box 24 \ 5 Scan001 | |
| Cause of overheating and water boiling trouble, suggesting high atmospheric temperature in Australia. | 10th Feb 1925 | Box 24 \ 5 Scan002 | |
| Overheating issues in Australia, testing a single branch exhaust manifold against a two-branch system on a 40/50 engine. | 1st Apr 1925 | Box 24 \ 5 Scan003 | |
| Investigating a potential overheating issue in a 40/50 HP car, likely caused by a faulty exhaust butterfly baffle. | 25th Sep 1924 | Box 24 \ 5 Scan004 | |
| Overheating issues of the 40/50 model at various speeds and ventilation configurations. | 9th Apr 1925 | Box 24 \ 5 Scan005 | |
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