| Description | Date | Identifier | |
| Analysis of continuous explosions when coasting with a slightly open throttle. | 8th Aug 1926 | Box 66 \ 2 scan0224 | |
| Experimental results and theory on engine mixture and firing behavior. | 8th Aug 1926 | Box 66 \ 2 scan0225 | |
| Analysis of engine explosions in the exhaust manifold under various experimental conditions. | 8th Aug 1926 | Box 66 \ 2 scan0226 | |
| Analysis of the causes of explosions in the exhaust manifold and silencer when closing the throttle. | 23th Aug 1926 | Box 66 \ 2 scan0227 | |
| Broken exhaust manifold on chassis 55-MC due to expansion and contraction. | 23th Aug 1926 | Box 66 \ 2 scan0228 | |
| Experiments to stop explosions in a Phantom's silencer by admitting air to the induction pipe. | 23th Aug 1926 | Box 66 \ 2 scan0229 | |
| Analysis of engine explosions in the silencer, induction pipe depression, and the effects of fuel mixture. | 23th Aug 1926 | Box 66 \ 2 scan0230 | |
| Troubleshooting engine explosions by adjusting carburettor mixture, throttle openings, and early ignition timing. | 23th Aug 1926 | Box 66 \ 2 scan0231 | |
| Testing wire gauze in the exhaust system and the effect of a governor to prevent explosions. | 23th Aug 1926 | Box 66 \ 2 scan0232 | |
| Summary of methods to prevent continuous explosions in the silencer. | 23th Aug 1926 | Box 66 \ 2 scan0233 | |
| Investigation into the cause of explosions in the silencer on the Phantom model. | 23th Aug 1926 | Box 66 \ 2 scan0234 | |
| Throttle friction, proposing ball bearings and comparing engine performance with Hispano and Lancia cars. | 27th Aug 1926 | Box 66 \ 2 scan0235 | |
| Experiments with a superheated hot spot system on the Phantom model. | 27th Aug 1926 | Box 66 \ 2 scan0236 | |
| Heat transference, superheated systems, and tests to determine heat flow to the engine cooling water. | 27th Aug 1926 | Box 66 \ 2 scan0237 | |
| Report page analysing heat added to cooling water under various loads and speeds, with conclusions on improving the induction system. | 26th Jul 1906 | Box 66 \ 2 scan0238 | |
| Diagram of an apparatus used for heat flow tests and a graph showing the temperature rise of oil. | 26th Jul 1906 | Box 66 \ 2 scan0239 | |
| Overheating in the interior of Phantom cars and the difficulties of fixing exhaust lagging. | 30th Aug 1926 | Box 66 \ 2 scan0240 | |
| Experiments to prevent exhaust system corrosion on Phantom chassis. | 8th Sep 1926 | Box 66 \ 2 scan0241 | |
| Investigations into the fault of explosions in the silencer, comparing the Phantom and Silver Ghost models. | 11th Sep 1926 | Box 66 \ 2 scan0242 | |
| Cause and potential cures for a 'popping back' issue in Phantom engines. | 13th Sep 1926 | Box 66 \ 2 scan0243 | |
| Modifications to a silencer to prevent heat damage to car bodies. | 5th Oct 1926 | Box 66 \ 2 scan0244 | |
| Explosions in the silencer of a Phantom car. | 6th Oct 1926 | Box 66 \ 2 scan0245 | |
| Technical memo discussing the causes and tests related to explosions in the silencer. | 6th Oct 1926 | Box 66 \ 2 scan0246 | |
| Test procedure for a Phantom vehicle to diagnose explosions in the silencer related to the carburetter and throttle settings. | 7th Oct 1926 | Box 66 \ 2 scan0247 | |
| Summary of conclusions regarding explosions in the silencer, comparing the Phantom and Silver Ghost models. | 7th Oct 1926 | Box 66 \ 2 scan0248 | |
| Tests conducted to understand explosions in the silencer of the Phantom chassis. | 7th Oct 1926 | Box 66 \ 2 scan0249 | |
| Report discussing the causes of engine explosions related to governor controls, throttle settings, and induction system leaks. | 7th Oct 1926 | Box 66 \ 2 scan0250 | |
| Analysis of eliminating engine explosions by adjusting petrol flow into the induction system at different throttle positions. | 7th Oct 1926 | Box 66 \ 2 scan0251 | |
| Engine throttle issues, extra petrol feed, and causes of firing in the silencer. | 7th Oct 1926 | Box 66 \ 2 scan0252 | |
| Page describing the effects of carbon deposit and worn bearings on throttle closure and suggesting ball bearings as a solution. | 7th Oct 1926 | Box 66 \ 2 scan0253 | |
| List of general tests carried out to investigate explosions in the silencer and induction system. | 7th Oct 1926 | Box 66 \ 2 scan0254 | |
| List of checks and potential improvements for a vehicle fault, focusing on the throttle and carburettor. | 7th Oct 1926 | Box 66 \ 2 scan0255 | |
| Investigation into explosions in the silencer, comparing the causes between the Silver Ghost and Phantom models. | 7th Oct 1926 | Box 66 \ 2 scan0256 | |
| Comparison of ignition and throttle systems between the Phantom and Silver Ghost models, focusing on explosions and throttle closing. | 7th Oct 1926 | Box 66 \ 2 scan0257 | |
| Comparison of fuel mixture requirements for silencer explosions in Silver Ghost and Phantom models. | 10th Sep 1926 | Box 66 \ 2 scan0258 | |
| Valve timing and the induction system for the Aluminium Phantom Engine. | 10th Sep 1926 | Box 66 \ 2 scan0259 | |
| Request for the Experimental Dept. to examine a New Phantom car with an explosions-in-silencer fault. | 18th Oct 1926 | Box 66 \ 2 scan0260 | |
| The distortion and failure of exhaust pipes on a 12-EX car. | 3rd Nov 1926 | Box 66 \ 2 scan0261 | |
| Receipt and distribution of Phantom exhaust valves made from 'Ochromite' for material analysis. | 3rd Nov 1926 | Box 66 \ 2 scan0262 | |
| Fault of the Phantom engine running backwards when being switched off, which has been traced to the exhaust valves. | 11th Nov 1926 | Box 66 \ 2 scan0263 | |
| Note discussing issues with carburetter connections and exhaust pipes due to expansion and contraction effects. | 5th Nov 1926 | Box 66 \ 2 scan0264 | |
| From R. to Hs. E. proposing a modification to the 40/50 lightweight engine's carburetter and induction system, based on the Lorraine engine. | 11th Nov 1926 | Box 66 \ 2 scan0265 | |
| Tests comparing governor control versus positive hand-controlled throttles to prevent silencer explosions. | 15th Nov 1926 | Box 66 \ 2 scan0266 | |
| Diagnosing and remedying explosions in the silencer caused by improperly adjusted throttle controls. | 10th Oct 1926 | Box 66 \ 2 scan0267 | |
| Technical analysis of engine explosions, comparing the Phantom unfavourably with the Silver Ghost. | 10th Oct 1926 | Box 66 \ 2 scan0268 | |
| Continued report page comparing a component to the Phantom and mentioning a forthcoming report on a roller bearing throttle. | 26th Nov 1926 | Box 66 \ 2 scan0269 | |
| Proposed heat shield for a Phantom's exhaust silencer to mitigate excessive heat. | 26th Nov 1926 | Box 66 \ 2 scan0270 | |
| Proposed new front axle control for the Phantom model, including modifications and a testing method. | 1st Dec 1926 | Box 66 \ 2 scan0271 | |
| Repeated failure of the Phantom Induction and Jacket Feed Pipes, with proposed alterations to fix issues of thermal expansion and gas flow. | 2nd Feb 1927 | Box 66 \ 2 scan0272 | |
| Proposing alterations to the Phantom induction and exhaust jacketed feed pipes to resolve in-service issues. | 8th Mar 1927 | Box 66 \ 2 scan0273 | |
| Request to fit a heat shield to car 8-EX and to borrow a Phantom throttle governor casing for testing. | 4th May 1927 | Box 66 \ 2 scan0274 | |
| Fitting of a lubricator to address a squeaking and sticking exhaust butterfly baffle. | 13th Jun 1927 | Box 66 \ 2 scan0275 | |
| The despatch and fitting instructions for two Butterfly Valves for the Phantom Exhaust Downtake Pipes. | 17th Jun 1927 | Box 66 \ 2 scan0276 | |
| Instructions for fitting replacement butterfly valves to the Phantom exhaust system for specific chassis numbers. | 18th Jun 1927 | Box 66 \ 2 scan0277 | |
| Use of bronze versus black leaded steel nuts on exhaust manifolds to prevent seizing. | 20th Jun 1927 | Box 66 \ 2 scan0278 | |
| Fitting of special butterfly valves for a Phantom exhaust system and scheduling the 10-EX touring car. | 20th Jun 1927 | Box 66 \ 2 scan0279 | |
| Use of graphite grease on butterfly valves and the movement of specific vehicles. | 21th Jun 1927 | Box 66 \ 2 scan0280 | |
| Resume of the position regarding issues with nuts securing exhaust manifolds and the solutions explored. | 22th Jun 1927 | Box 66 \ 2 scan0281 | |
| Modifications to the Phantom exhaust pipe system for chassis fitted with front axle control. | 9th Jul 1927 | Box 66 \ 2 scan0282 | |
| Proposal to improve road clearance on Phantom and 20 HP models by modifying the exhaust pipe and rear petrol tank sump. | 9th Jul 1927 | Box 66 \ 2 scan0283 | |
| Quarterly complaints report addressing failures of the water pump and hot spot pipe with proposed design solutions. | 4th Jul 1927 | Box 66 \ 2 scan0284 | |
| Necessity and testing of an exhaust heat shield baffle for open touring cars. | 15th Jul 1927 | Box 66 \ 2 scan0285 | |
| Standardisation of a baffle on the silencer to reduce heat in the body. | 25th May 1927 | Box 66 \ 2 scan0286 | |
| Standardization of chassis parts detailing the first fitment of a new component. | 2nd Oct 1927 | Box 66 \ 2 scan0287 | |
| The testing of lubricated butterfly valves in the exhaust down-take, recommending standardization. | 27th Sep 1927 | Box 66 \ 2 scan0288 | |
| New single downtake pipe, exhaust system, and a new slipper flywheel. | 24th Oct 1927 | Box 66 \ 2 scan0289 | |
| Upcoming tests for a modified crankshaft, tubular connecting rods, and slipper wheel in a 10-EX Phantom engine. | 1st Nov 1927 | Box 66 \ 2 scan0290 | |
| The difficult fitting of a flexible exhaust jacket feed pipe for the Phantom, suggesting custom fitting and the use of varying aluminium washers. | 3rd Nov 1927 | Box 66 \ 2 scan0291 | |
| Fitting a parallel control for the F.2 series, comparing single and double downtake options. | 8th Nov 1927 | Box 66 \ 2 scan0292 | |
| Standardisation of a modified pipe to the exhaust hot spot to improve reliability. | 10th Nov 1927 | Box 66 \ 2 scan0293 | |
| Questionnaire detailing the chassis number, test date, and costs for fitting a new part. | 9th Apr 1928 | Box 66 \ 2 scan0294 | |
| Standardisation sheet detailing cost figures for new and old parts. | 24th Nov 1927 | Box 66 \ 2 scan0295 | |
| Test report comparing a new single downpipe exhaust system for the Phantom with the standard system for power output and noise. | 11th Nov 1927 | Box 66 \ 2 scan0296 | |
| Continuation of a report on hot spot valve experiments and investigations into exhaust systems. | 11th Nov 1927 | Box 66 \ 2 scan0297 | |
| Performance graph comparing a single outlet exhaust manifold with different hot-spot valve settings against a standard exhaust system on a Phantom P.E.25 engine. | 11th Nov 1927 | Box 66 \ 2 scan0298 | |
| Graph of Brake Horse Power versus engine RPM for a single outlet exhaust manifold with the cutout open. | 6th Dec 1927 | Box 66 \ 2 scan0299 | |
| Unsatisfactory exhaust noises on the New Phantom caused by a faulty cut-out control mechanism. | 6th Dec 1927 | Box 66 \ 2 scan0300 | |
| Tests on a Phantom single downpipe exhaust system to determine the cause of power loss. | 6th Dec 1927 | Box 66 \ 2 scan0301 | |
| The performance comparison of single versus standard manifold systems, detailing power loss, heat output, and modifications. | 6th Dec 1927 | Box 66 \ 2 scan0302 | |
| Summary comparing single and double exhaust manifolds, detailing power loss, temperature, and noise issues. | 26th Nov 1927 | Box 66 \ 2 scan0303 | |
| Graph of Brake Horse Power vs RPM showing power loss for a Phantom engine with a single outlet exhaust manifold. | 26th Nov 1927 | Box 66 \ 2 scan0304 | |
| Graph showing the power loss to standard exhaust manifolds for a Phantom engine. | 28th Nov 1927 | Box 66 \ 2 scan0305 | |
| Graph comparing power loss for different exhaust systems on a Phantom engine. | 28th Nov 1927 | Box 66 \ 2 scan0306 | |
| Graph showing power loss for a modified single exhaust manifold on a Phantom engine. | 20th Nov 1924 | Box 66 \ 2 scan0307 | |
| Sketch showing an alteration to a Phantom single outlet exhaust manifold. | 28th Oct 1922 | Box 66 \ 2 scan0308 | |
| Lack of sympathy for a design alteration regarding the New Phantom Chassis exhaust noises and cutout control. | 9th Dec 1927 | Box 66 \ 2 scan0309 | |
| Standardisation of an exhaust choke valve lubricator scheme to eliminate squeaks. | 29th Nov 1927 | Box 66 \ 2 scan0310 | |
| Form outlining the costs and implementation details for the standardisation of chassis parts. | 9th Apr 1928 | Box 66 \ 2 scan0311 | |
| Design of gas passages, pipes, and carburettors for Super Sports models, and reporting on vehicle testing. | 21th Jan 1928 | Box 66 \ 2 scan0312 | |
| Design of exhaust manifolds and pipes for the Super Sports 20 HP model. | 21th Jan 1928 | Box 66 \ 2 scan0313 | |
| Phantom exhaust manifold pipe corrosion and a proposal to have them 'fescolised' to prevent it. | 21th Mar 1928 | Box 66 \ 2 scan0314 | |
| Correspondence regarding a sample 'Staybrite' single downtake exhaust pipe for the Phantom engine, supplied by Accles & Pollock. | 23th Mar 1928 | Box 66 \ 2 scan0315 | |
| Potential issues with aluminium coating on exhaust manifolds and proposing experimental tests. | 4th May 1928 | Box 66 \ 2 scan0316 | |
| Investigation into exhaust valve stretching on a Phantom model. | 10th May 1928 | Box 66 \ 2 scan0317 | |
| Urgent third application memo regarding an opinion on Front Silencer Covers made of 'Coronil' metal for the 40/50-HP chassis. | 10th May 1928 | Box 66 \ 2 scan0318 | |
| Non-receipt of front silencer covers R.74696 in Coronil metal. | 11th May 1928 | Box 66 \ 2 scan0319 | |
| Stretching of exhaust valves on vehicle 29-CL and proposed design alterations. | 29th Oct 1928 | Box 66 \ 2 scan0320 | |
| Results of a 5000-mile test on aluminium-treated exhaust manifolds for the Phantom model. | 19th Nov 1928 | Box 66 \ 2 scan0321 | |
| Experimental fitting of a Phantom rear silencer to an SS car's exhaust system. | 1st Mar 1929 | Box 66 \ 2 scan0322 | |
| Special copper asbestos jointings with a steel liner for the Phantom engine exhaust manifold. | 28th May 1929 | Box 66 \ 2 scan0323 | |
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