| Description | Date | Identifier | |
| Diagram of a Hispano carburettor manifold showing a baffle. | 2nd Feb 1927 | Box 66a \ 1 scan0167 | |
| Blueprint diagram illustrating a slotted pipe assembly. | 2nd Feb 1927 | Box 66a \ 1 scan0168 | |
| Blueprint diagram illustrating a double throttle carburettor. | 2nd Feb 1927 | Box 66a \ 1 scan0169 | |
| Blueprint diagram illustrating a double throttle carburettor. | 20th Feb 1927 | Box 66a \ 1 scan0170 | |
| Potential improvements and different configurations for the Phantom induction pipe and carburetter. | 20th Feb 1927 | Box 66a \ 1 scan0171 | |
| Analysis of the annulus area for low-speed carburetter jets on 20HP & 40/50HP chassis. | 22th Feb 1927 | Box 66a \ 1 scan0172 | |
| Fluff sample from a carburettor and a request for a micro photograph. | 2nd Mar 1927 | Box 66a \ 1 scan0173 | |
| Issues with filters on Phantom and 20 HP models and potential solutions. | 12th Mar 1927 | Box 66a \ 1 scan0174 | |
| New valve designs for 40/50HP and 20HP carburettors and requesting testing. | 29th Mar 1927 | Box 66a \ 1 scan0175 | |
| Issues with a sticking and jamming Phantom throttle and suggesting potential remedies. | 1st May 1927 | Box 66a \ 1 scan0176 | |
| Corrosion on a Phantom's carburetter aluminium air valve, suggesting a switch to silicon alloy or reverting to a brass type. | 1st Jul 1927 | Box 66a \ 1 scan0177 | |
| Replacing existing petrol filters in carburettor float chambers with a new type. | 20th Jul 1927 | Box 66a \ 1 scan0178 | |
| Outlining the policy for modifications to the Phantom engine. | 20th Jul 1927 | Box 66a \ 1 scan0179 | |
| Feedback and suggested alterations for the Blue Sports Car 10-EX. | 18th Aug 1927 | Box 66a \ 1 scan0180 | |
| Modifications required for fitting new frame instruments to car dashboards, particularly for show cars. | 24th Aug 1927 | Box 66a \ 1 scan0181 | |
| Production of a pattern for an experimental induction pipe for Phantom engines. | 1st Aug 1927 | Box 66a \ 1 scan0182 | |
| Confirming a verbal instruction regarding the use of loose washers in carburetters to achieve minimum clearance. | 29th Aug 1927 | Box 66a \ 1 scan0183 | |
| Recommending the incorporation of an improved bearing surface for a Phantom carburetter diaphragm link. | 31th Aug 1927 | Box 66a \ 1 scan0184 | |
| Corrosion issues with a Phantom air valve and the testing of alternative materials and coatings. | 1st Sep 1927 | Box 66a \ 1 scan0185 | |
| Suitable new material for air valves and the limitations of anodic treatment on wearing surfaces. | 16th Sep 1927 | Box 66a \ 1 scan0186 | |
| Excessive play in the Phantom low speed carburetter jet stem and proposing dimensional modifications. | 16th Sep 1927 | Box 66a \ 1 scan0187 | |
| Complaints of excessive play in the Phantom low-speed carburetter jet stem and proposing a solution. | 16th Sep 1927 | Box 66a \ 1 scan0188 | |
| Experiments on Phantom carburettors concerning high induction pipe depressions. | 19th Sep 1927 | Box 66a \ 1 scan0189 | |
| Test results and modifications for an experimental Phantom carburetter compared to a standard model. | 19th Sep 1927 | Box 66a \ 1 scan0190 | |
| Comparison of carburetter types, focusing on induction pipe depression, air flow and volumetric efficiency. | 19th Sep 1927 | Box 66a \ 1 scan0191 | |
| Summary of carburetter tests on Phantom and 20 HP models, discussing results and future testing plans. | 13th Sep 1927 | Box 66a \ 1 scan0192 | |
| Graph of a Phantom engine's power curve, showing the increase resulting from using larger chokes in the carburettor. | 13th Sep 1927 | Box 66a \ 1 scan0193 | |
| Power curve graph for the Lighter Phantom engine, showing an increase due to a low depression carburettor. | 13th Apr 1927 | Box 66a \ 1 scan0194 | |
| Solutions for air valve corrosion and sticking in 40/50 HP & 20 HP carburettors. | 7th Sep 1927 | Box 66a \ 1 scan0195 | |
| Clearances and the production of test spindles for the Phantom's low-speed carburetter jet. | 19th Sep 1927 | Box 66a \ 1 scan0196 | |
| The testing of an experimental weir type induction pipe for a Phantom engine. | 29th Sep 1927 | Box 66a \ 1 scan0197 | |
| Two new provisional British patent suggestions for carburetter designs. | 29th Oct 1927 | Box 66a \ 1 scan0198 | |
| New provisional British patents and improvements for carburettors. | 1st Nov 1927 | Box 66a \ 1 scan0199 | |
| Low depression carburettor experiments for the Phantom model, including a sketch of the adapted manifold. | 3rd Nov 1927 | Box 66a \ 1 scan0200 | |
| Test report on engine intake and carburetter modifications to improve power output. | 3rd Nov 1927 | Box 66a \ 1 scan0201 | |
| Carburettor experiments and engine performance tuning, focusing on depression carbs and diffuser jets. | 3rd Nov 1927 | Box 66a \ 1 scan0202 | |
| Proposal to conduct tests on an expanding type carburetter and to construct a new model. | 24th Nov 1927 | Box 66a \ 1 scan0203 | |
| Instruction to alter drawings for the Phantom low-speed carburettor jet spindle size. | 24th Nov 1927 | Box 66a \ 1 scan0204 | |
| Provisional patents and design improvements for carburetters, including a sketch of a new arrangement. | 30th Nov 1927 | Box 66a \ 1 scan0205 | |
| Modification to the carburetter, independent of induction pipe pressure. | 17th Dec 1927 | Box 66a \ 1 scan0206 | |
| Sending a blueprint of the first rough drawing for a new chassis carburetter. | 17th Dec 1927 | Box 66a \ 1 scan0207 | |
| The size check and fit of a standard production air valve for chassis 58-AL. | 15th Oct 1928 | Box 66a \ 1 scan0208 | |
| Carburation irregularities on the 40/50 HP model when the Autovac system is working. | 16th Jan 1928 | Box 66a \ 1 scan0209 | |
| Proposal to improve the Phantom carburetter by reviving a scheme to use a diffuser type jet. | 21th Jan 1929 | Box 66a \ 1 scan0210 | |
| Carburetter development, comparing diffuser type jets against plain jets and planning for future expanding carburetter types. | 28th Jan 1929 | Box 66a \ 1 scan0211 | |
| Comparing expanding and static type carburetters to improve vehicle performance. | 28th Jan 1929 | Box 66a \ 1 scan0212 | |
| Continued list of the advantages and disadvantages of a particular carburetor design. | 28th Jan 1929 | Box 66a \ 1 scan0213 | |
| Carburettor performance during acceleration, with a diagram of an idling system. | 28th Jan 1929 | Box 66a \ 1 scan0214 | |
| Technical explanation of carburetor behavior under sudden throttle opening, comparing car and aero engines. | 28th Jan 1929 | Box 66a \ 1 scan0215 | |
| Page discussing the operation of the Phantom carburettor, focusing on low-speed performance and acceleration. | 28th Jan 1929 | Box 66a \ 1 scan0216 | |
| Comparison of carburettor performance, detailing the operational principles of the Phantom carburettor. | 28th Jan 1929 | Box 66a \ 1 scan0217 | |
| Proposal to overcome carburettor high depression issues by using a dual choke system with diffuser type jets. | 28th Jan 1929 | Box 66a \ 1 scan0218 | |
| Page discussing carburettor depression principles with diagrams of a diaphragm and a 'straight through' type carburettor. | 28th Jan 1929 | Box 66a \ 1 scan0219 | |
| The design and advantages of a suction-controlled carburettor. | 28th Jan 1929 | Box 66a \ 1 scan0220 | |
| Atomisation and economy for a Phantom carburetter, suggesting patent protection for its principle of operation. | 28th Jan 1929 | Box 66a \ 1 scan0221 | |
| Blueprint drawing of the carburetter throttle for the 40/50 (Phantom) model. | 1st Jul 1926 | Box 66a \ 1 scan0222 | |
| The performance and issues of an aluminium carburetter for a Phantom engine. | 1st Jul 1926 | Box 66a \ 1 scan0223 | |
| Continuation page of a report discussing material modifications for a part and the petrol union. | 6th Jul 1926 | Box 66a \ 1 scan0224 | |
| Standardisation of chassis parts by changing the carburetter material from bronze to aluminium to reduce weight. | 6th Jul 1926 | Box 66a \ 1 scan0225 | |
| Standardization sheet detailing material changes for carburetters and induction pipes from bronze/cast iron to aluminium. | 11th Aug 1926 | Box 66a \ 1 scan0226 | |
| Delay of a material changeover for induction pipes and carburetters from cast iron to aluminium. | 30th Aug 1926 | Box 66a \ 1 scan0227 | |
| Issues with seizing screw threads on aluminium carburetors. | 20th Jun 1927 | Box 66a \ 1 scan0228 | |
| Overtightening issues with aluminium carburetter float-chamber covers and potential design changes. | 21th Jun 1927 | Box 66a \ 1 scan0229 | |
| Complaint about a lack of acceleration, defending the carburetor's low-speed performance. | 16th Sep 1927 | Box 66a \ 1 scan0230 | |
| Modifications to induction pipes, exhaust pipes, and cylinder heads for Super Sports models. | 21th Jan 1928 | Box 66a \ 1 scan0231 | |
| Test report on a modified straight through vertical carburetter for the Phantom model. | 25th Apr 1928 | Box 66a \ 1 scan0232 | |
| Carburetter tests comparing fixed choke and constant depression systems for power output and fuel atomisation. | 25th Apr 1928 | Box 66a \ 1 scan0233 | |
| Findings on carburetter and air intake performance during testing. | 25th Apr 1928 | Box 66a \ 1 scan0234 | |
| Sketch illustrating a Twin Air Intake for a Claudel Hobson Carburettor. | 25th Apr 1928 | Box 66a \ 1 scan0235 | |
| Blueprint of the internal dimensions for a Claudel-Hobson carburettor and weir induction pipe for the Phantom model. | 25th Apr 1928 | Box 66a \ 1 scan0236 | |
| Graph showing power variation with the size of the carburetor choke for a Phantom engine. | 20th Jun 1928 | Box 66a \ 1 scan0237 | |
| The urgent creation of patterns for a new experimental Phantom carburetter. | 20th Jun 1928 | Box 66a \ 1 scan0238 | |
| Issues and modifications for the 20 HP mixture adjustment. | 24th Aug 1928 | Box 66a \ 1 scan0239 | |
| Secret memo detailing a modification to the valve cover fixing to facilitate easier removal from the engine. | 3rd Oct 1924 | Box 66a \ 2 scan0001 | |
| The discrepancy between flywheel markings and actual engine valve timings for EAC valves and fittings. | 14th Jan 1925 | Box 66a \ 2 scan0002 | |
| Valve timing specifications for chassis 93-NK and 46-PK. | 17th Mar 1925 | Box 66a \ 2 scan0003 | |
| Diagrams and specifications for E.A.C. valve timing, ignition timing, and tappet adjustments. | 17th Mar 1925 | Box 66a \ 2 scan0004 | |
| Blueprint detailing E.A.C. valve and ignition timing settings and tappet adjustments. | 14th May 1925 | Box 66a \ 2 scan0005 | |
| Alternative schemes for White Metal Glands on New Phantom Valves, comparing them to the existing Felt solution. | 17th Nov 1925 | Box 66a \ 2 scan0006 | |
| The resolution of tappet noise on a Phantom model by adhering to drawing specifications. | 11th Dec 1925 | Box 66a \ 2 scan0007 | |
| Noisy tappet trouble on the New Phantom, detailing issues with guides and springs. | 10th Dec 1925 | Box 66a \ 2 scan0008 | |
| Laboratory report on the chemical analysis of a tappet spring made from Chrome Vanadium Steel. | 7th Jan 1926 | Box 66a \ 2 scan0009 | |
| Material composition of tappet springs, including a chemical analysis report for Chrome Vanadium Steel. | 1st Jan 1926 | Box 66a \ 2 scan0010 | |
| The condition of tappet springs on the 8-EX car after completing 10,000 miles in France. | 9th Jan 1925 | Box 66a \ 2 scan0011 | |
| Excessive tappet roller wear on Phantom and 20 HP engines due to oil shortage, and the recommended lubrication procedure. | 28th Jan 1926 | Box 66a \ 2 scan0012 | |
| Clearance issue with a felt packing washer and proposing a new valve guide design for the 40/50HP chassis. | 28th Jan 1926 | Box 66a \ 2 scan0013 | |
| Investigation into the cause and remedy for tappet and top valve rocker knocks. | 19th Mar 1926 | Box 66a \ 2 scan0014 | |
| Investigation into an engine knock, focusing on the rocker arm and valve spring assembly. | 19th Mar 1926 | Box 66a \ 2 scan0015 | |
| Investigation into engine valve knocking, detailing experiments with lubrication, clearance adjustments, and component replacement. | 19th Mar 1926 | Box 66a \ 2 scan0016 | |
| Resolving an engine knock by adjusting valve clearances. | 30th Mar 1926 | Box 66a \ 2 scan0017 | |
| Engine gas flow restrictions, new cylinders for F.10, and new heads for E.16, Phantom, and Goshawk engines. | 30th Mar 1926 | Box 66a \ 2 scan0018 | |
| Development and weight-saving schemes for the Lighter Phantom Engine. | 31th Mar 1926 | Box 66a \ 2 scan0019 | |
| Valve seat erosion in Eagle 9 and Condor engines, investigating the causes and examining a specific cylinder. | 12th Apr 1926 | Box 66a \ 2 scan0020 | |
| Analysis of valve rotation and carbon build-up, with proposed modifications to prevent the valve from spinning. | 12th Apr 1926 | Box 66a \ 2 scan0021 | |
| The erosion of valve seats in a Phantom engine, comparing the issue to aero engines and suggesting experimental solutions. | 12th Apr 1926 | Box 66a \ 2 scan0022 | |
| The torsional deflection of valve springs in relation to exhaust valve seat erosion in Aero and Phantom engines. | 15th Apr 1926 | Box 66a \ 2 scan0023 | |
| Further experiments on valve seating materials, valve turning, and oil flooding. | 15th Apr 1926 | Box 66a \ 2 scan0024 | |
| Material choices for valve push rods on Phantom engines, comparing steel, monel-metal, and duralumin. | 15th Apr 1926 | Box 66a \ 2 scan0025 | |
| Raising questions about valve seat trouble in Phantom and other engines. | 16th Apr 1926 | Box 66a \ 2 scan0026 | |
| The investigation of Phantom engine tappet noises and the testing of different push rod materials. | 22th Apr 1926 | Box 66a \ 2 scan0027 | |
| | | | |
