| Description | Date | Identifier | |
| Investigation by a mechanic in Paris into overheating complaints from cars used in Switzerland. | 8th Oct 1921 | Box 24 \ 4 Scan033 | |
| Engine overheating issues and potential solutions for cars operating in the Swiss Alps. | 14th Oct 1921 | Box 24 \ 4 Scan034 | |
| Use of louvred bonnets to prevent overheating, suggesting larger shutters as an alternative. | 15th Oct 1921 | Box 24 \ 4 Scan035 | |
| Engine overheating, comparing the effectiveness of louvered bonnets against shutters. | 18th Oct 1921 | Box 24 \ 4 Scan036 | |
| C.J. to Hs. concerning a query about engine heating. | 9th Nov 1921 | Box 24 \ 4 Scan037 | |
| Letter from Madrid concerning client complaints of engines overheating and springs yielding on chassis 63-GE. | 5th Nov 1921 | Box 24 \ 4 Scan038 | |
| Cover note attaching a letter from the British Embassy in Rome about a device fitted to a car to resolve a water boiling issue. | 11th Nov 1921 | Box 24 \ 4 Scan039 | |
| Customer feedback letter from the British Embassy in Rome regarding the performance of a high-speed fan on chassis U.E.25. | 10th Nov 1921 | Box 24 \ 4 Scan040 | |
| Cooling system issues and proposed solutions for armoured cars. | 6th Dec 1921 | Box 24 \ 4 Scan041 | |
| Need for radiator shutters on the Goshawk 11 model for water temperature control, especially for cold climates. | 1st Jan 1922 | Box 24 \ 4 Scan042 | |
| Fitting radiator shutters to cars exported to cold climates and a policy for cars used in England. | 1st Jan 1922 | Box 24 \ 4 Scan043 | |
| Query regarding the Goshawk engine's water cooling system, specifically the head joint water ways and flow rate. | 7th Mar 1922 | Box 24 \ 4 Scan044 | |
| Goshawk engine's water cooling system issues and potential solutions. | 26th May 1932 | Box 24 \ 4 Scan045 | |
| Radiator priming issues in the Goshawk engine and proposed improvements to the cooling system. | 30th May 1922 | Box 24 \ 4 Scan046 | |
| Comparative test measuring the velocity of air passing through the radiators on the 40/50 and Goshawk II engines. | 30th May 1922 | Box 24 \ 4 Scan047 | |
| Tests on the Goshawk engine to reduce water loss, comparing results with the 40/50 model. | 30th May 1922 | Box 24 \ 4 Scan048 | |
| Engine overheating, detonation warnings, and thermometer reliability in 40/50 and Goshawk models. | 30th May 1922 | Box 24 \ 4 Scan049 | |
| Test results for the Goshawk II engine cooling, measuring fan belt slip and its effect on airflow through the radiator. | 1st Jun 1932 | Box 24 \ 4 Scan050 | |
| Inlet and outlet water temperatures with conclusions on improving Goshawk engine cooling. | 1st Jun 1922 | Box 24 \ 4 Scan051 | |
| The Goshawk engine cylinder head after extreme cooling tests involving running with boiling and no water. | 1st Jun 1922 | Box 24 \ 4 Scan052 | |
| Investigation into an overheated engine that ran without water, and a proposal to road test a 4-Goshawk-11 engine to replicate a cylinder head failure. | 9th Jun 1922 | Box 24 \ 4 Scan053 | |
| Effects of overheating and water loss on Goshawk and other engines, proposing further tests. | 9th Jun 1922 | Box 24 \ 4 Scan054 | |
| Inquiry into the effects of water loss on engine cooling temperature and the potential for an alarm system. | 9th Jun 1922 | Box 24 \ 4 Scan055 | |
| Road test of a Goshawk car under severe boiling conditions and the subsequent investigation into cylinder head material failures. | 1st Aug 1932 | Box 24 \ 4 Scan056 | |
| Investigation into why some cylinder heads have cracked, pointing to the material or its condition as the cause. | 13th Jun 1922 | Box 24 \ 4 Scan057 | |
| 40/50 engine cooling tests, investigating issues of running without water and preventing water loss when boiling. | 5th Jun 1922 | Box 24 \ 4 Scan058 | |
| Comparative tests of water loss from a car's radiator under various boiling conditions. | 19th Jun 1922 | Box 24 \ 4 Scan059 | |
| Cooling system tests for the Goshawk engine when operated with a reduced amount of water. | 19th Jun 1922 | Box 24 \ 4 Scan060 | |
| Overheating and fan belt breakages on a new chassis, as reported from Madrid. | 10th Jul 1922 | Box 24 \ 4 Scan061 | |
| Letter regarding new chassis overheating in Madrid and subsequent issues with high-speed fan belts breaking. | 6th Jul 1922 | Box 24 \ 4 Scan062 | |
| Testing an annealed Goshawk cylinder head for cracks under severe boiling conditions. | 11th Jul 1922 | Box 24 \ 4 Scan063 | |
| Engine boiling test to observe water loss and check for cracks. | 18th Jun 1923 | Box 24 \ 4 Scan064 | |
| The Rushmore scheme, a new method for cooling automotive engines using steam condensation. | 18th Jun 1923 | Box 24 \ 4 Scan065 | |
| Engine overheating issues and potential solutions for the 40/50 and Goshawk models. | 19th Jan 1923 | Box 24 \ 4 Scan066 | |
| Suggestion to use zinc blocks or sheets to neutralize or reduce the detrimental effects of certain types of water. | 10th May 1923 | Box 24 \ 4 Scan067 | |
| Multiple failures of the Rushmore Steam Cooling system on a 40/50 car after 3000 miles. | 10th May 1923 | Box 24 \ 4 Scan068 | |
| Short memo confirming the decision to condemn the concept of steam cooling. | 17th May 1923 | Box 24 \ 4 Scan069 | |
| Cover note forwarding a letter from a customer, Mr. F.S. Sidney, concerning cooling for internal remarks. | 27th Jul 1923 | Box 24 \ 4 Scan070 | |
| Customer feedback on a new model's performance and overheating issue during a European tour, with suggestions for improvement. | 27th Jul 1923 | Box 24 \ 4 Scan071 | |
| The second page of a signed letter from F.E. Sidney providing feedback on a car's engine performance. | 30th Jul 1923 | Box 24 \ 4 Scan072 | |
| Cooling test results for a 20 HP chassis after addressing an overheating issue. | 30th Jul 1923 | Box 24 \ 4 Scan073 | |
| Typed memo forwarding a letter from Mr. Sidney concerning an overheating issue on a 40/50 HP model. | 31th Jul 1923 | Box 24 \ 4 Scan074 | |
| Letter from a customer detailing an overheating issue experienced with their car on the Continent and proposing solutions. | 31th Jul 1923 | Box 24 \ 4 Scan075 | |
| Concluding page of a letter offering suggestions and seeking an opinion. | 10th Aug 1923 | Box 24 \ 4 Scan076 | |
| Various points and questions concerning engine water boiling issues. | 10th Aug 1923 | Box 24 \ 4 Scan077 | |
| Technical note regarding engine performance at slow speeds, Goshawk radiator shutters, and by-pass radiator cooling. | 1st Aug 1923 | Box 24 \ 4 Scan078 | |
| Proposal for a standardized cooling system test to gather comparative data on the 40/50 HP and 20 HP models. | 1st Aug 1923 | Box 24 \ 4 Scan079 | |
| Continued document outlining modifications for radiator testing on the 40/50 and 20 HP models. | 27th Aug 1923 | Box 24 \ 4 Scan080 | |
| Cover memo attaching correspondence regarding engine overheating on F.E. Sydney's 40/50 Car. | 27th Aug 1923 | Box 24 \ 4 Scan081 | |
| The overheating engine of F.E. Sydney's car. | 27th Aug 1923 | Box 24 \ 4 Scan082 | |
| Remedies for engine overheating in a 40/50 HP car. | 21th Aug 1923 | Box 24 \ 4 Scan083 | |
| Customer complaints of car overheating and potential solutions. | 16th Aug 1923 | Box 24 \ 4 Scan084 | |
| Forwarding a letter from Mr. Sydney regarding over-heating trouble on the 40/50 HP model. | 31th Jul 1923 | Box 24 \ 4 Scan085 | |
| Forwarding a customer's letter regarding cooling for comment. | 27th Jul 1923 | Box 24 \ 4 Scan086 | |
| Engine overheating on the 40/50 HP chassis and potential solutions such as larger radiators or radiator shutters. | 29th Aug 1923 | Box 24 \ 4 Scan087 | |
| Heat losses to the jacket water, factors influencing these losses, heat distribution, and thermal efficiency. | 6th Sep 1923 | Box 24 \ 4 Scan088 | |
| Comparing clean and carbonised engines, detailing the method for measuring heat loss to jacket water. | 6th Sep 1923 | Box 24 \ 4 Scan089 | |
| Engine heat flow analysis under various test conditions. | 6th Sep 1923 | Box 24 \ 4 Scan090 | |
| High compression engine test data sheet detailing thermal efficiency, power output, and heat balance. | 6th Sep 1923 | Box 24 \ 4 Scan091 | |
| Table showing heat distribution as a percentage of initial heat supply at various engine RPMs. | 6th Sep 1923 | Box 24 \ 4 Scan092 | |
| Test data sheet showing thermal efficiency, power, and heat balance for a low compression test engine at various RPMs. | 6th Sep 1923 | Box 24 \ 4 Scan093 | |
| Data table showing heat distribution as a percentage of heat supplied at various engine RPMs. | 6th Sep 1923 | Box 24 \ 4 Scan094 | |
| Data sheet comparing heat flow to cooling water under different throttle, RPM, and compression ratio conditions. | 6th Sep 1923 | Box 24 \ 4 Scan095 | |
| Test data on heat flow vs. mixture strength and ignition effect for a low compression engine. | 6th Sep 1923 | Box 24 \ 4 Scan096 | |
| Test data comparing heat flow in clean vs. carbonised engines and between cast iron vs. aluminium pistons. | 21th Aug 1923 | Box 24 \ 4 Scan097 | |
| Methods to prevent water loss from the radiator due to boiling. | 21th Aug 1923 | Box 24 \ 4 Scan098 | |
| Tests to prevent loss of water from the radiator due to boiling. | 21th Aug 1923 | Box 24 \ 4 Scan099 | |
| Radiator modifications to reduce steam and water loss. | 12th Jul 1923 | Box 24 \ 4 Scan100 | |
| Preventing engine coolant from boiling by pressurizing the cooling system. | 14th Sep 1923 | Box 24 \ 4 Scan101 | |
| Radiator overflow pipe scheme, recommending testing on cars. | 18th Jul 1932 | Box 24 \ 4 Scan102 | |
| Increasing the boiling point of radiator water by pressurization. | 12th Jul 1925 | Box 24 \ 4 Scan103 | |
| Testing a pressurized engine cooling system to prevent boiling above 100°C. | 12th Jul 1923 | Box 24 \ 4 Scan104 | |
| Page detailing boiling points at various pressures and engine temperature/pressure data from a full load test. | 15th Jul 1923 | Box 24 \ 4 Scan105 | |
| Road test results for engine cooling performance with varying radiator release valve pressure settings. | 12th Jul 1923 | Box 24 \ 4 Scan106 | |
| Investigating customer complaints of engine boiling on the 40/50 HP model. | 1st Oct 1923 | Box 24 \ 4 Scan107 | |
| Comparing the cooling systems of various cars. | 12th Jul 1923 | Box 24 \ 4 Scan108 | |
| Comparing the matrix dimensions of various cars. | 12th Jul 1923 | Box 24 \ 4 Scan109 | |
| Comparison of the Goshawk 11 and 40/50 HP radiators. | 5th Oct 1923 | Box 24 \ 4 Scan110 | |
| Comparison table of radiator and engine cooling metrics for various car models, based on litre displacement. | 5th Oct 1923 | Box 24 \ 4 Scan111 | |
| Comparative table of car radiator specifications based on engine displacement per mile on a direct drive basis. | 3rd Oct 1923 | Box 24 \ 4 Scan112 | |
| Comparison table of various car radiators and their specifications. | 3rd Oct 1923 | Box 24 \ 4 Scan113 | |
| The reverse side of a folded document showing a Print Room receiving stamp and a handwritten reference number. | 8th Oct 1923 | Box 24 \ 4 Scan114 | |
| Secret memo concerning the E.A.C. radiator, referencing a previous report and warning of potential boiling issues. | 8th Oct 1923 | Box 24 \ 4 Scan115 | |
| Comparison of engine litre displacement metrics presented in two tables. | 10th Dec 1923 | Box 24 \ 4 Scan116 | |
| Letter discussing the effects of increased water circulation on engine cooling performance. | 10th Dec 1923 | Box 24 \ 4 Scan117 | |
| Radiator surface area, cooling, and water circulation systems on the 40/50 model. | 16th Jan 1924 | Box 24 \ 4 Scan118 | |
| Engine overheating issues on 40/50 HP and Goshawk cars. | 16th Jan 1924 | Box 24 \ 4 Scan119 | |
| Water boiling issues on 40/50 HP and 20 HP cars, comparing radiators and suggesting improvements. | 1st Feb 1924 | Box 24 \ 4 Scan120 | |
| Water boiling in car engines at high altitudes during continental tours. | 4th Feb 1924 | Box 24 \ 4 Scan121 | |
| Potential solutions to engine overheating on 40/50 HP and 20 HP cars. | 6th Feb 1924 | Box 24 \ 4 Scan122 | |
| Water boiling issues on 40/50 and 20 HP cars, potential causes, and remedies. | 2nd Jul 1924 | Box 24 \ 4 Scan123 | |
| The issue of water boiling at high altitudes on continental tours. | 22th Feb 1924 | Box 24 \ 4 Scan124 | |
| Customer complaints about overheating and heat from floorboards in 40/50 and 20-HP models. | 25th Feb 1924 | Box 24 \ 4 Scan125 | |
| Follow-up memo requesting information on how to satisfy customers who are becoming sarcastic about unresolved car issues. | 25th Feb 1924 | Box 24 \ 4 Scan126 | |
| Anticipating summer overheating and water boiling issues in 40/50 cars and listing recommended solutions. | 23th May 1924 | Box 24 \ 4 Scan127 | |
| 40/50 HP model overheating issue and a proposed solution of removing alternate fan blades. | 24th Jun 1924 | Box 24 \ 4 Scan128 | |
| Concerning a letter from Messrs. Paddon Bros regarding C.H. Runge, Esq., Chassis 53-S-9. | 11th Jul 1924 | Box 24 \ 4 Scan129 | |
| Letter from a dealer concerning a client's car overheating and requesting a potential solution. | 10th Jul 1924 | Box 24 \ 4 Scan130 | |
| To C.H. Runge Esq. concerning an engine boiling issue on chassis 53-S-9. | 15th Jul 1924 | Box 24 \ 4 Scan131 | |
| Customer's complaint about overheating in a 20-HP car and the possibility of fitting sliding bonnet panels. | 18th Jul 1924 | Box 24 \ 4 Scan132 | |
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