| Description | Date | Identifier | |
| Oil feed experiments on the Phantom and oil consumption tests on the Silver Ghost. | 12th Jun 1925 | Box 72 \ 1 scan0112 | |
| With graphs showing Silver Ghost oil consumption versus oil pressure and oil flow from road tests. | 12th Jun 1925 | Box 72 \ 1 scan0113 | |
| Comparing oil consumption and leakage with seven versus three oil feeds for main bearings on Phantom and Silver Ghost cars. | 12th Jun 1925 | Box 72 \ 1 scan0114 | |
| Oil discharge in a Phantom engine, comparing results with and without grooves in the intermediate bearings. | 12th Jun 1925 | Box 72 \ 1 scan0115 | |
| Summarizing the factors controlling oil consumption and their relative importance. | 12th Jun 1925 | Box 72 \ 1 scan0116 | |
| Remedies for over-oiling engines, focusing on piston designs and lubrication modifications for the Phantom engine. | 15th Dec 1925 | Box 72 \ 1 scan0117 | |
| Letter acknowledging receipt of an Experimental Report regarding a comparison of oil feeds to crankshaft bearings. | 24th Dec 1925 | Box 72 \ 1 scan0118 | |
| Front hub lubrication, discussing bearing failures due to a lack of lubrication on specific chassis. | 29th Dec 1925 | Box 72 \ 1 scan0119 | |
| Front bearing lubrication issues, replacement policies, and customer refunds. | 29th Dec 1925 | Box 72 \ 1 scan0120 | |
| Change from grease to oil for front hub lubrication and requesting updated drawings. | 29th Dec 1925 | Box 72 \ 1 scan0121 | |
| Acknowledgement of receipt for Experimental Report No. 8980 regarding oiling tests on the Phantom. | 2nd Jan 1926 | Box 72 \ 1 scan0122 | |
| Procedure for measuring oil flow through the bearings on a Phantom engine. | 27th Apr 1926 | Box 72 \ 1 scan0123 | |
| Continuation page of a data table showing performance metrics under different RPMs. | 1st May 1926 | Box 72 \ 1 scan0124 | |
| The factors controlling overoiling in Phantom engines compared to Silver Ghost engines. | 1st May 1926 | Box 72 \ 1 scan0125 | |
| Report with graphs analyzing engine oil consumption versus oil flow through bearings for Silver Ghost and Phantom models. | 1st May 1926 | Box 72 \ 1 scan0126 | |
| Comparison of oil consumption versus oil pressure for Silver Ghost and Phantom models, attributing differences to bearing clearances. | 1st May 1926 | Box 72 \ 1 scan0127 | |
| Comparison of oil flow between Silver Ghost and Phantom engines and methods for reducing it. | 1st May 1926 | Box 72 \ 1 scan0128 | |
| Engine testing, oil flow, and the performance of different types of piston rings. | 1st May 1926 | Box 72 \ 1 scan0129 | |
| The causes of oil consumption and smoking exhaust, with a summary of findings from engine tests. | 1st May 1926 | Box 72 \ 1 scan0130 | |
| High oil consumption on the Phantom engine, linking it to the fit of bearings and piston rings. | 1st May 1926 | Box 72 \ 1 scan0131 | |
| Graph plotting oil flow through bearings against engine RPM for car 12.EX at a pressure of 17.5-27 lbs/sq in. | 6th May 1926 | Box 72 \ 1 scan0132 | |
| Oil tests and instructions to address over-oiling in Phantom engines. | 6th May 1926 | Box 72 \ 1 scan0133 | |
| Oil flow measurements through bearings for car 67-TC and providing comparative test data. | 7th Jul 1926 | Box 72 \ 1 scan0134 | |
| New, more convenient method for lubricating the off-side bearing of the clutch operating shaft. | 16th Jul 1926 | Box 72 \ 1 scan0135 | |
| Engine inspection for Chassis 115-MC, detailing issues with bearings and the crankshaft due to overoiling. | 25th Sep 1926 | Box 72 \ 1 scan0136 | |
| Investigation into steering lubrication and its effect on reversibility, comparing the Phantom and Silver Ghost models. | 26th Nov 1926 | Box 72 \ 1 scan0137 | |
| Recommending a change in gear oil, standardizing 'Amber A' for axles and gearboxes on both 20 HP and Phantom models. | 23th Dec 1926 | Box 72 \ 1 scan0138 | |
| Graph comparing the viscosities of various oils based on temperature versus efflux time. | 1st Mar 1928 | Box 72 \ 1 scan0139 | |
| Requesting a car with an over-oiling Phantom engine for a two-day test of a new corrective scheme. | 1st Mar 1928 | Box 72 \ 1 scan0140 | |
| Advantages of minimizing lubricating grooves in aero and car engines. | 3rd Mar 1928 | Box 72 \ 1 scan0141 | |
| Technical memorandum discussing engine over-oiling, related sparking plug trouble, and tests on various scraper rings. | 10th May 1928 | Box 72 \ 1 scan0142 | |
| Report page discussing engine oil pressure at idling speeds and the Curtiss oiling system. | 19th Nov 1929 | Box 72 \ 1 scan0143 | |
| Modifications to HP shock absorber valves and the lubrication of grooved springs for the Phantom I. | 19th Nov 1929 | Box 72 \ 1 scan0144 | |
| Secret internal memorandum discussing the progress of engine development, including crankcase patterns and cylinder block design. | 5th May 1923 | Box 72 \ 1 scan0145 | |
| Continued testing of a rubber mounting with a single point mounting on car 9-EX. | 22th Nov 1927 | Box 72 \ 1 scan0146 | |
| Requesting design details for the breather connections on the E.A.C. engine crankcase. | 11th Sep 1923 | Box 72 \ 1 scan0147 | |
| Secret memo discussing the merits of a disc crankshaft and its potential impact on engine design and performance. | 8th May 1924 | Box 72 \ 1 scan0148 | |
| Requesting an order for forgings for the 'Seagull' crankshaft X.3837, referencing drawing No.Lec.1633. | 1st Oct 1922 | Box 72 \ 1 scan0149 | |
| 'Seagull' spring drive and slipper flywheel, sending a drawing and requesting a blueprint. | 16th Jan 1923 | Box 72 \ 1 scan0150 | |
| The ratio of connecting rod length to crank radius for various engines like Condor, Goshawk, and Hawk. | 7th Mar 1924 | Box 72 \ 1 scan0151 | |
| Extract concerning combined magneto & battery ignition systems, hydraulic relays, and modifications to connecting rods and pistons to prevent engine knock. | 1st Apr 1924 | Box 72 \ 1 scan0152 | |
| Comparison of vibration and connecting rod length between Goshawk I and Goshawk 11 engines. | 1st May 1924 | Box 72 \ 1 scan0153 | |
| Tests with longer connecting rods to address over-run vibrations in an EAC engine. | 1st May 1924 | Box 72 \ 1 scan0154 | |
| Testing lower compression pistons for the EAC car to reduce detonation and improve engine smoothness. | 12th Jul 1923 | Box 72 \ 1 scan0155 | |
| Magneto, discussing its automatic advance and suitability for an engine. | 12th Jul 1923 | Box 72 \ 1 scan0156 | |
| Potential solutions for overrun vibration, including shaft thickness, flywheel weight, and piston weight. | 29th Feb 1924 | Box 72 \ 1 scan0157 | |
| With a diagram and notes on a combined magneto and battery ignition automatic advance system. | 1st Apr 1924 | Box 72 \ 1 scan0158 | |
| Explanation of a double-acting, symmetrical 5-piston valve arrangement with diagrams. | 1st Apr 1924 | Box 72 \ 1 scan0159 | |
| Technical discussion on an automatic ignition advance mechanism, including design considerations for pistons, magnetos, and detonation. | 27th Dec 1922 | Box 72 \ 1 scan0160 | |
| New simplified design for the 'Seagull' cylinder head and induction pipe and the plan to test it. | 27th Dec 1922 | Box 72 \ 1 scan0161 | |
| The 'SEAGULL' cylinder head and valve rocker gear. | 1st Oct 1923 | Box 72 \ 1 scan0162 | |
| Specifications for a rocker mechanism and valve push rods, including materials, dimensions and clearances. | 27th Jan 1923 | Box 72 \ 1 scan0163 | |
| Explaining the design choice of casting the 'Seagull' engine's cylinder block in two separate groups of three. | 27th Jan 1923 | Box 72 \ 1 scan0164 | |
| Secret memo from E. to Hs. regarding engine development progress for the crankcase, cylinder blocks, and ancillaries. | 5th May 1923 | Box 72 \ 1 scan0165 | |
| Blueprints for an experimental cylinder head and valve guides. | 28th Nov 1923 | Box 72 \ 1 scan0166 | |
| Design and drawings for the 'Seagull' cylinder head and valve rocker gear. | 1st Jan 1923 | Box 72 \ 1 scan0167 | |
| Technical memorandum detailing the design and arrangement of valve push rods and rocker mechanisms. | 8th Jan 1923 | Box 72 \ 1 scan0168 | |
| Modifications to the 'Seagull' valve rocker components and associated drawings. | 8th Jan 1923 | Box 72 \ 1 scan0169 | |
| Calculations for the 'Seagull' valve rocker exact lift, referencing drawing No.LeC.1671. | 19th Jan 1923 | Box 72 \ 1 scan0170 | |
| Engine's power curve, performance, and a specific issue with tappet adjustment. | 29th Sep 1923 | Box 72 \ 1 scan0171 | |
| Issues with sticking tappets, a proposed fix, and the need for stronger valve springs. | 8th Oct 1923 | Box 72 \ 1 scan0172 | |
| Secret memo detailing modifications to the EAC gearbox, engine support, and valve tappets for the power unit. | 13th Oct 1923 | Box 72 \ 1 scan0173 | |
| E.A.C. engine tappet modifications to resolve sticking issues and a comparison of three different carburettors. | 3rd Oct 1923 | Box 72 \ 1 scan0174 | |
| Tests of an E.A. C-1 engine, discussing valve stretching and proposed modifications. | 26th Nov 1923 | Box 72 \ 1 scan0175 | |
| The failure of umbrella valves on an E. A. C-1 engine after 250 hours of testing. | 1st Nov 1923 | Box 72 \ 1 scan0176 | |
| Inadequate heat flow and E.A.C. valve spring breakages. | 18th Jan 1924 | Box 72 \ 1 scan0177 | |
| Secret memorandum on the valve lift and valve springs for the EAC engine, with comparisons to other engines. | 18th Jan 1924 | Box 72 \ 1 scan0178 | |
| Proposed changes to valve lift, valve springs, and the use of tubular push rods. | 4th Jan 1923 | Box 72 \ 1 scan0179 | |
| Replacement of valve E.70319 with the flat-headed valve E.71163 for 132 sets of EAC.II chassis. | 4th Jan 1923 | Box 72 \ 1 scan0180 | |
| Secret internal memo requesting models of E.A.C. valve gear parts for inspection. | 19th Jan 1924 | Box 72 \ 1 scan0181 | |
| Secret memorandum discussing alternatives for valve springs to reduce stress and breakage. | 25th Jan 1924 | Box 72 \ 1 scan0182 | |
| Page 2 of a report discussing the properties of steels. | 22th Feb 1924 | Box 72 \ 1 scan0183 | |
| Request to produce 100 valve forgings for the EAC engine using a special steel supplied by Messrs. Firths. | 22th Feb 1924 | Box 72 \ 1 scan0184 | |
| Technical drawing of an E.A.C. valve with key dimensions and specifications. | 1st May 1924 | Box 72 \ 1 scan0185 | |
| Valve lift curves with lower lift, sending associated drawings and specifying new dimensions. | 6th Jun 1924 | Box 72 \ 1 scan0186 | |
| Tests with lower lift cams on an E.A.C. engine. | 19th Sep 1924 | Box 72 \ 1 scan0187 | |
| The results of tests with a low lift camshaft on an EAC engine. | 17th Sep 1924 | Box 72 \ 1 scan0188 | |
| Oscilloscope observations of valve bounce on Engine 1-EAC-11 with a high lift camshaft at various speeds. | 19th Sep 1924 | Box 72 \ 1 scan0189 | |
| Test results for valve bounce on engine 1-EAC-11 with a low lift camshaft at various speeds. | 19th Sep 1924 | Box 72 \ 1 scan0190 | |
| Telegram regarding car parts for a Silver Ghost and potential issues after repairs. | 20th Sep 1926 | Box 72 \ 1 scan0191 | |
| New pattern for the 'Seagull' cylinder head and induction pipe. | 27th Dec 1922 | Box 72 \ 1 scan0192 | |
| Test bench experiments with a Marmon engine for induction pipe development and its subsequent failure. | 15th Mar 1923 | Box 72 \ 1 scan0193 | |
| Continued report on engine testing, discussing the disappointing B.M.E.P. of a Marmon engine compared to a Goshawk-11. | 15th Mar 1923 | Box 72 \ 1 scan0194 | |
| Fuel/air distribution experiments conducted on a Marmon engine. | 15th Mar 1923 | Box 72 \ 1 scan0195 | |
| Non-homogeneous fuel mixture supply and surging in the intake manifold. | 16th Nov 1923 | Box 72 \ 1 scan0196 | |
| E.A, C-1 engine investigation regarding the boiler draining scheme. | 16th Nov 1923 | Box 72 \ 1 scan0197 | |
| Tests of the R.A.C-1 induction system and hot-spot on a 40/50 HP engine. | 12th Jul 1923 | Box 72 \ 1 scan0198 | |
| Petrol consumption, distribution, and performance of the standard R.A.C. hot-spot induction system. | 12th Jul 1923 | Box 72 \ 1 scan0199 | |
| Comparing the performance of different induction system hot-spots, including cast iron and aluminum variants. | 12th Jul 1923 | Box 72 \ 1 scan0200 | |
| Comparing the efficiency of aluminium versus cast iron hot spots for fuel evaporation. | 12th Jul 1923 | Box 72 \ 1 scan0201 | |
| Carburetter and induction system modifications, seeking confirmation on the heating system for the elbow and boilers. | 19th Jan 1924 | Box 72 \ 1 scan0202 | |
| Secret memo detailing engine design considerations from a meeting at Le Canadel. | 1st Mar 1924 | Box 72 \ 1 scan0203 | |
| Carburetter for the E.A.C. engine. | 1st Oct 1923 | Box 72 \ 1 scan0204 | |
| Summarising observations on the performance of the E.A.C. Carburetter. | 12th Jul 1923 | Box 72 \ 1 scan0205 | |
| Completion of the carburetter and induction system, seeking confirmation on related heating system alterations. | 9th Jan 1924 | Box 72 \ 1 scan0206 | |
| Print of the Knave carburetter for the E.A.C. engine. | 5th Dec 1923 | Box 72 \ 1 scan0207 | |
| 'whistling' noise in the carburetter at low speeds. | 1st Oct 1923 | Box 72 \ 1 scan0208 | |
| Improvements to the exhaust, silencer, and cutout system for the E.A.C. engine. | 14th Mar 1924 | Box 72 \ 1 scan0209 | |
| Meeting memorandum discussing engine design for cam timing, induction, exhaust, and detonation. | 22th Mar 1924 | Box 72 \ 1 scan0210 | |
| Testing a fixed choke type carburetter with a vaporiser. | 29th May 1924 | Box 72 \ 1 scan0211 | |
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