| Description | Date | Identifier | |
| Modifications to carburetter and radiator shutter controls. | 8th Aug 1924 | Box 38 \ 2 Scan202 | |
| Investigation into the cause of a radiator bursting on a 40/50 HP car. | 8th Aug 1924 | Box 38 \ 2 Scan203 | |
| Examination of a reported 40/50 HP radiator bursting, finding the fault to be faulty soldering rather than a burst. | 11th Aug 1924 | Box 38 \ 2 Scan204 | |
| Issue of engine water boiling in the 40/50 HP model and potential solutions. | 21th Aug 1924 | Box 38 \ 2 Scan205 | |
| Technical discussion on engine cooling issues, comparing fan and radiator performance to a Hispano model. | 21th Aug 1924 | Box 38 \ 2 Scan206 | |
| Engine cooling systems, comparing radiator design and water circulation with a Hispano system. | 1st Aug 1924 | Box 38 \ 2 Scan207 | |
| Over-heating issues, radiator tests, and comparisons between EAC, Hispano, and 40/50 HP models. | 1st Aug 1924 | Box 38 \ 2 Scan208 | |
| New radiator, its potential standardisation for the 40/50 HP, and sending a car to Italy. | 1st Aug 1924 | Box 38 \ 2 Scan209 | |
| Investigating boiling troubles in a radiator. | 1st Aug 1924 | Box 38 \ 2 Scan210 | |
| Page discussing heat flow to the jacket water and temperatures on a test bed engine under full load. | 1st Aug 1924 | Box 38 \ 2 Scan211 | |
| Radiator performance test results for a 40/50 HP engine under various conditions. | 26th Sep 1924 | Box 38 \ 2 Scan212 | |
| Graph comparing the cooling performance of a 40/50 model against a Hispano Suiza during a hill climb test. | 26th Sep 1924 | Box 38 \ 2 Scan213 | |
| Blank page with a 'Print Room' receiving stamp. | 26th Aug 1926 | Box 38 \ 2 Scan214 | |
| Graph comparing the cooling performance of a 40/50 model against a Hispano Suiza at an average speed of 35 mph. | 25th Aug 1924 | Box 38 \ 2 Scan215 | |
| Graphs showing radiator, water, and air temperature test results for a 40/50 HP car on a dynamometer. | 4th Jan 1932 | Box 38 \ 2 Scan216 | |
| Blank document page with a 'Print Room' stamp. | 26th Aug 1924 | Box 38 \ 2 Scan217 | |
| Secret internal memorandum discussing car radiator and fan design for the 20 HP and 40/50 HP models. | 29th Aug 1924 | Box 38 \ 2 Scan218 | |
| Engine cooling issues, fan efficiency, bonnet lift, and preventing water loss from boiling. | 8th Sep 1924 | Box 38 \ 2 Scan219 | |
| On engine overheating, comparing heat transfer to water in high versus low compression engines. | 8th Sep 1924 | Box 38 \ 2 Scan220 | |
| The relative amounts of heat rejected to cooling water, referencing Ricardo's tests on engine compression ratios. | 12th Jul 1928 | Box 38 \ 2 Scan221 | |
| Comparing heat loss and cooling efficiency of the E.A.C. car against the 40/50 HP model. | 9th Sep 1924 | Box 38 \ 2 Scan222 | |
| Radiator tests. | 11th Sep 1924 | Box 38 \ 2 Scan223 | |
| Radiator tests and heat transfer to jacket water on a standard 40/50 HP car. | 1st Sep 1924 | Box 38 \ 2 Scan224 | |
| Heat dissipation from the radiator under various engine loads. | 12th Jul 1923 | Box 38 \ 2 Scan225 | |
| Engine cooling issues, specifically addressing fan belt slippage and the tendency to boil on hills. | 11th Sep 1924 | Box 38 \ 2 Scan226 | |
| Engine cooling performance and water temperature during hill climbing scenarios. | 11th Sep 1924 | Box 38 \ 2 Scan227 | |
| Radiator heat dissipation and the influence of outside air temperature. | 11th Sep 1924 | Box 38 \ 2 Scan228 | |
| Page from a report discussing average radiator temperature and the density of air flowing through the core. | 11th Sep 1924 | Box 38 \ 2 Scan229 | |
| Graph plotting heat flow to jacket water against brake horsepower at the road wheels for a 40/50 HP engine at various loads. | 11th Sep 1924 | Box 38 \ 2 Scan230 | |
| Blank document page with a red ink stamp from the print room. | 11th Sep 1924 | Box 38 \ 2 Scan231 | |
| Graph plotting heat flow to jacket water per litre against engine RPM for a 40/50 HP high compression car. | 11th Sep 1924 | Box 38 \ 2 Scan232 | |
| Curve showing the horsepower required to drive a 40/50 HP car up a 1 in 12 gradient. | 11th Sep 1924 | Box 38 \ 2 Scan233 | |
| Graph showing heat given to jacket water and dissipated by the radiator for a 40/50 HP car. | 11th Sep 1926 | Box 38 \ 2 Scan234 | |
| The reverse side of a document showing a 'Print Room' date stamp from Derby. | 11th Sep 1926 | Box 38 \ 2 Scan235 | |
| Tests conducted on 40/50 HP radiators to alleviate boiling issues. | 11th Sep 1924 | Box 38 \ 2 Scan236 | |
| Fan efficiency, comparing R-R to Hispano, and analysing fan belt performance at various speeds. | 11th Sep 1924 | Box 38 \ 2 Scan237 | |
| Engine cooling issues, discussing fan belt improvements and bonnet ventilation tests. | 11th Sep 1924 | Box 38 \ 2 Scan238 | |
| Engine cooling improvements and boiling tests. | 11th Sep 1924 | Box 38 \ 2 Scan239 | |
| Statement on the boiling limits of 20 HP and 40/50 HP cars without causing damage. | 11th Sep 1924 | Box 38 \ 2 Scan240 | |
| Fan speed ratios for the 40/50 HP car and issuing a correction to a previously circulated blueprint. | 11th Sep 1924 | Box 38 \ 2 Scan241 | |
| Specification sheet for the 40/50 model radiator and cylinder block, detailing weights and water capacities. | 17th Sep 1924 | Box 38 \ 2 Scan242 | |
| Tests to alleviate engine boiling on the 40/50 HP model. | 18th Sep 1924 | Box 38 \ 2 Scan243 | |
| Alleviating boiling troubles by hill climbing on indirect gears. | 18th Sep 1924 | Box 38 \ 2 Scan244 | |
| Engine cooling performance, focusing on fan belt slip and the effects of gear selection on radiator temperature. | 1st Sep 1924 | Box 38 \ 2 Scan245 | |
| Engine cooling performance, comparing the effects of different gears and fan belt tension. | 18th Sep 1924 | Box 38 \ 2 Scan246 | |
| Three graphs illustrating radiator temperature tests conducted on Cat and Fiddle Hill, analyzing overheating when climbing. | 16th Sep 1924 | Box 38 \ 2 Scan247 | |
| The heat given to the cooling water of a Hispano engine on a dynamometer. | 1st Sep 1924 | Box 38 \ 2 Scan248 | |
| Analysing the thermal efficiency and heat losses of the Hispano engine. | 22th Sep 1924 | Box 38 \ 2 Scan249 | |
| Energy diagram for a Hispano engine. | 19th Sep 1924 | Box 38 \ 2 Scan250 | |
| Advantages and trial results of steam engine cooling systems. | 30th Sep 1924 | Box 38 \ 2 Scan251 | |
| Engine cooling systems, including overheating issues, condenser tanks, and pressurized systems. | 14th Sep 1924 | Box 38 \ 2 Scan252 | |
| Test report on a sealed, pressurized radiator system to prevent water from boiling above 100°C. | 14th Sep 1923 | Box 38 \ 2 Scan253 | |
| Test results for engine cooling performance, with tables for boiling points at different pressures and temperatures at various speeds. | 14th Sep 1923 | Box 38 \ 2 Scan254 | |
| Road tests on a 49-GB standard engine measuring radiator water loss during a hill climb. | 29th Oct 1924 | Box 38 \ 2 Scan255 | |
| Request to borrow a radiator with 6' deep tubes and a 20' matrix for testing purposes. | 29th Oct 1924 | Box 38 \ 2 Scan256 | |
| The effect of thermostat removal on 40/50 HP engine overheating. | 21th Nov 1924 | Box 38 \ 2 Scan257 | |
| Methods for comparing radiator cooling efficiencies. | 25th Nov 1924 | Box 38 \ 2 Scan258 | |
| Radiator cooling performance, analyzing efficiency based on Newton's Laws of Cooling. | 25th Nov 1924 | Box 38 \ 2 Scan259 | |
| Method for testing radiator performance by simulating hill climbing on a level road. | 25th Nov 1924 | Box 38 \ 2 Scan260 | |
| Summarizing radiator test results concerning matrix heights, ventilation, and shutter effectiveness. | 25th Nov 1924 | Box 38 \ 2 Scan261 | |
| The 40/50 HP cooling system's performance, fan dependency, and radiator modifications. | 25th Nov 1924 | Box 38 \ 2 Scan262 | |
| Comparing the engine cooling performance of the Hispano and 40/50 HP models at 20 M.P.H. | 25th Nov 1924 | Box 38 \ 2 Scan263 | |
| Comparing the heat dissipation of Hispano and 40/50 type radiator matrices. | 25th Nov 1924 | Box 38 \ 2 Scan264 | |
| With recommendations to reduce vehicle over-heating. | 25th Nov 1924 | Box 38 \ 2 Scan265 | |
| Data table showing the value of increasing matrix height and reducing depth for cooling systems at 30 m.p.h. | 25th Nov 1924 | Box 38 \ 2 Scan266 | |
| Table evaluating the performance of different ventilation configurations for a 20 HP Matrix at various speeds. | 25th Nov 1924 | Box 38 \ 2 Scan267 | |
| Comparative analysis of the cooling performance of Hispano and 40/50 HP fans and cooling systems. | 25th Nov 1924 | Box 38 \ 2 Scan268 | |
| Performance data for a 40/50 HP engine cooling system, showing the effects of speed, ventilation, and fuel mixture. | 23th Mar 1921 | Box 38 \ 2 Scan269 | |
| Bar chart comparing the atmospheric temperature at which a car will boil under various cooling configurations and conditions. | 23th Mar 1921 | Box 38 \ 2 Scan270 | |
| Investigations into vehicle cooling systems. | 28th Nov 1924 | Box 38 \ 2 Scan271 | |
| Continuation page of an experimental report discussing engine overheating at low speeds. | 28th Nov 1924 | Box 38 \ 2 Scan272 | |
| Design limitations and trade-offs of the engine cooling system for a large D-headed engine. | 13th Dec 1924 | Box 38 \ 2 Scan273 | |
| Improvements for engine cooling on the 40/50 model, specifically regarding fans and bonnet design. | 31th Dec 1924 | Box 38 \ 2 Scan274 | |
| The scrapped tapered 40/50 radiator and the unsatisfactory results of previous mock-ups. | 27th Aug 1929 | Box 38 \ 2 Scan275 | |
| Extract discussing the development of a new dynamo and regulator based on observations of a Bijur set for the 'After-the-War-Chassis'. | 29th Jan 1918 | Box 38 \ 3 Scan001 | |
| Lighting installation with a cross-reference to a Packard Bijur dynamo. | 1st Feb 1918 | Box 38 \ 3 Scan002 | |
| Removal and analysis of a Bijur dynamo and regulator from a Packard car. | 7th Feb 1918 | Box 38 \ 3 Scan003 | |
| Procuring a model 45 testing instrument from Messrs. Weston to meet Mr. Royce's requirements. | 13th Feb 1918 | Box 38 \ 3 Scan004 | |
| Drawings and parts for a Packard Bijur for Mr. Royce. | 13th Feb 1918 | Box 38 \ 3 Scan005 | |
| Fitting a Bijur dynamo for experimental work, including specifications for pulleys and mounting. | 19th Feb 1918 | Box 38 \ 3 Scan006 | |
| Hand-drawn schematic showing the mounting and operation of a dynamo. | 19th Mar 1918 | Box 38 \ 3 Scan007 | |
| Instruction to produce one set of a pulley for a Bijur Dynamo for Mr. Royce. | 19th Mar 1918 | Box 38 \ 3 Scan008 | |
| Instruction to produce one set of drawings for a Packard Bijur part for Mr. Royce. | 3rd May 1918 | Box 38 \ 3 Scan009 | |
| The modification of a 'Bijur' dynamo from a Packard car to operate at 12 volts for Mr. Royce. | 14th May 1918 | Box 38 \ 3 Scan010 | |
| Adjustments to a dynamo and regulator system, addressing sparking contacts and charging a 12-volt battery. | 23th May 1918 | Box 38 \ 3 Scan011 | |
| Modifying a Bijur dynamo by inserting a 4-ohm resistance into the field circuit. | 23th May 1918 | Box 38 \ 3 Scan012 | |
| The replacement of a Packard Bijur dynamo, detailing operational issues and specific fitting requirements. | 15th Apr 1919 | Box 38 \ 3 Scan013 | |
| The modification of a Bijur dynamo for Mr. Royce, adjusting it from 6 to 12 volts by adding resistances. | 14th May 1918 | Box 38 \ 3 Scan014 | |
| The performance and adjustments made to a 12-volt dynamo system, focusing on contact sparking and circuit resistance. | 14th May 1920 | Box 38 \ 3 Scan015 | |
| Extract about sending a 12-volt battery and an adjustment key to Mr. Royce. | 14th May 1918 | Box 38 \ 3 Scan016 | |
| The setup of a dynamo, including issues with rotation direction, overheating, and a request for proper belting. | 13th Aug 1918 | Box 38 \ 3 Scan017 | |
| Continued memorandum listing electrical components to be requisitioned for drawing boards. | 14th Aug 1918 | Box 38 \ 3 Scan018 | |
| Lighting installation system for a house in West Wittering, referencing Mr. Royce's preferred method. | 14th Aug 1918 | Box 38 \ 3 Scan019 | |
| Typed memo from E. to EFC. regarding the supply of material for a rough installation. | 15th Aug 1918 | Box 38 \ 3 Scan020 | |
| The arrangement of fuse boxes for the lighting installation at West Wittering. | 15th Aug 1918 | Box 38 \ 3 Scan021 | |
| With a sketch, discussing cable sizes, insulators, and fuses for a low voltage lighting installation at West Wittering. | 19th Aug 1918 | Box 38 \ 3 Scan022 | |
| Continued discussion on sourcing miniature lamps and other electrical fittings for an installation, including a sketch of an insulator. | 19th Aug 1918 | Box 38 \ 3 Scan023 | |
| Technical memo regarding specifications and rectifications for a Bijur Dynamo. | 19th Aug 1918 | Box 38 \ 3 Scan024 | |
| Continued discussion on drive slip, regulator operation, and torque in relation to a rope drive system. | 25th Oct 1918 | Box 38 \ 3 Scan025 | |
| Telegram received by telephone confirming a blueprint for a lighting installation has been sent. | 24th Aug 1918 | Box 38 \ 3 Scan026 | |
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