| Description | Date | Identifier | |
| Springing alterations for chassis 43-KR, detailing customer complaints and ongoing experiments to fix issues with pitching and dithering. | 25th Oct 1929 | Box 65 \ 4 scan0146 | |
| Importance of frequent lubrication for leaf springs to resolve customer complaints about ride quality. | 25th Oct 1929 | Box 65 \ 4 scan0147 | |
| Tests and solutions for suspension complaints on the Phantom I model. | 10th Dec 1929 | Box 65 \ 4 scan0148 | |
| Technical report discussing vehicle ride quality, pitching, and suspension components like springs and shock absorbers. | 10th Dec 1929 | Box 65 \ 4 scan0149 | |
| Suspension improvements for Phantom I and II cars, focusing on front springs and drilled valves. | 10th Dec 1929 | Box 65 \ 4 scan0150 | |
| Testing lower-rated springs on the Phantom 1 model to address high-speed pitching complaints. | 31th Jan 1930 | Box 65 \ 4 scan0151 | |
| Investigation into 'pitching' issues with Phantom 1 cars and the trial of new front springs to improve ride quality. | 3rd Feb 1930 | Box 65 \ 4 scan0152 | |
| Frame distortion tests measuring the effects of engine mountings on torsional stiffness and front end jellying. | 29th May 1931 | Box 65 \ 4 scan0153 | |
| Test report comparing frame stiffness, damping, and engine mountings to mitigate 'jellying' across various models. | 29th May 1931 | Box 65 \ 4 scan0154 | |
| Five graphs illustrating frame deflection and distortion test results for various car configurations and components. | 28th May 1931 | Box 65 \ 4 scan0155 | |
| Reproducing connecting rod bearing failure on an EAC test bench engine. | 29th Apr 1925 | Box 65 \ 4 scan0156 | |
| The use of taper bolts for securing the EAC clutch flywheel. | 1st Jul 1926 | Box 65 \ 4 scan0157 | |
| Inspection of engine bearings, clearance issues, and a proposal for flow testing before dismantling. | 13th Aug 1926 | Box 65 \ 4 scan0158 | |
| Experiments on crankshaft vibrations in the Phantom and 20 HP engines. | 20th Sep 1926 | Box 65 \ 4 scan0159 | |
| Testing slipper wheels to reduce engine vibrations at different speeds. | 20th Sep 1926 | Box 65 \ 4 scan0160 | |
| Report page detailing the analysis of engine vibrations, friction torque, and preliminary test results on the Phantom model. | 20th Sep 1926 | Box 65 \ 4 scan0161 | |
| Vibration experiments focusing on lower harmonics, critical speed, and the effects of damping friction torque. | 20th Sep 1926 | Box 65 \ 4 scan0162 | |
| Engine vibration analysis, investigating the effects of damping, piston configuration, and piston weight. | 20th Sep 1926 | Box 65 \ 4 scan0163 | |
| Crankshaft stiffness, vibration testing, and future plans for the Silver Ghost and Phantom models. | 18th Sep 1926 | Box 65 \ 4 scan0164 | |
| Torsional vibration diagrams for the Goshawk III crankshaft with no damper wheels. | 18th Sep 1926 | Box 65 \ 4 scan0165 | |
| Experiments to determine the torsional deflection and rigidity of a Phantom crankshaft. | 23th Sep 1926 | Box 65 \ 4 scan0166 | |
| Calculation of the weight and polar moment of inertia for various engine components. | 4th Nov 1926 | Box 65 \ 4 scan0167 | |
| Report page detailing calculations for the critical speed of the Phantom crankshaft compared to the 20 HP model. | 4th Nov 1926 | Box 65 \ 4 scan0168 | |
| Vibration issues and diagnostics on car model 12-EX. | 1st Oct 1926 | Box 65 \ 4 scan0169 | |
| Issue of the New Phantom crankshaft pinion working loose. | 10th Oct 1926 | Box 65 \ 4 scan0170 | |
| Letter to the Air Ministry regarding a report on crankshaft torsional vibration tests on a 40/50 HP engine. | 4th Nov 1926 | Box 65 \ 4 scan0171 | |
| Experiments to determine the torsional deflection and polar moments of inertia of Phantom crankshaft components. | 4th Nov 1926 | Box 65 \ 4 scan0172 | |
| Continued report on the calculation of crankshaft vibration, nodal points, and critical speed. | 8th Nov 1926 | Box 65 \ 4 scan0173 | |
| Better Mean Effective Pressure for 20 HP and 40/50 HP engines. | 8th Nov 1926 | Box 65 \ 4 scan0174 | |
| Further tests concerning torsional vibrations on the 20 HP and Phantom engines, focusing on a non-rigidly mounted flywheel. | 9th Nov 1926 | Box 65 \ 4 scan0175 | |
| Analysis of crankshaft vibration, comparing a non-rigid flywheel to a slipper wheel damper system. | 9th Nov 1926 | Box 65 \ 4 scan0176 | |
| Analysis of crankshaft resonant speeds, flywheel friction effects, and torsional vibrations on the Phantom model. | 9th Nov 1926 | Box 65 \ 4 scan0177 | |
| Continued analysis of engine vibration, comparing crankshaft rigidity and internal damping between the 20 HP and Phantom models. | 9th Nov 1926 | Box 65 \ 4 scan0178 | |
| Analysis of engine damper effectiveness, comparing viscous-friction and centrifugal types for managing vibrations. | 9th Nov 1926 | Box 65 \ 4 scan0179 | |
| Concluding page of a report on investigations into crankshafts. | 9th Nov 1926 | Box 65 \ 4 scan0180 | |
| Diagram of an experimental friction mounting for a flywheel on a 20 HP crankshaft. | 10th Nov 1926 | Box 65 \ 4 scan0181 | |
| Graph comparing torsional vibration amplitudes for the Goshawk and Phantom models at critical speed without external damping. | 10th Nov 1926 | Box 65 \ 4 scan0182 | |
| Graph showing curves for the reduction in torsional vibration amplitude with decreased frictional mounting of the flywheel. | 10th Nov 1928 | Box 65 \ 4 scan0183 | |
| Polar diagrams comparing the crankshaft oscillations of 20-HP and Phantom models at the speed of resonance. | 9th Nov 1926 | Box 65 \ 4 scan0184 | |
| Letter to Mr. Robotham regarding a report of tests taken on a 40/50 HP engine. | 9th Nov 1926 | Box 65 \ 4 scan0185 | |
| Cover note for a report on Torsional Vibration. | 11th Nov 1926 | Box 65 \ 4 scan0186 | |
| Short memo requesting information on crankshaft vibrations from General Motors. | 24th Nov 1926 | Box 65 \ 4 scan0187 | |
| Letter to General Motors Ltd. requesting information about their crankshaft torsional vibration damper. | 22th Nov 1926 | Box 65 \ 4 scan0188 | |
| Letter asking questions about the theory of engine vibration and damper action. | 14th Jan 1927 | Box 65 \ 4 scan0189 | |
| Crankshaft torsional vibrations and the harmonic balancer used by General Motors. | 14th Jan 1927 | Box 65 \ 4 scan0190 | |
| Letter from General Motors Corporation discussing harmonic balancers and engine design. | 10th Dec 1926 | Box 65 \ 4 scan0191 | |
| The concluding page of a letter discussing engine damping devices and a comment on London fog. | 15th Dec 1926 | Box 65 \ 4 scan0192 | |
| Letter from General Motors regarding the harmonic balancer and torsional vibration of crankshafts. | 15th Dec 1926 | Box 65 \ 4 scan0193 | |
| Technical report on the detailed operation and phase relations of a shaft and harmonic balancer. | 15th Dec 1926 | Box 65 \ 4 scan0194 | |
| Letter discussing the effects of a shaft balancer on disturbance periods and vibration frequencies. | 28th Jan 1927 | Box 65 \ 4 scan0195 | |
| Letter to the Royal Aeronautical Society enclosing remarks on the Carter paper for publication in their Journal. | 28th Jan 1927 | Box 65 \ 4 scan0196 | |
| Technical discussion on the causes and mitigation of crankshaft vibrations in multi-crank engines. | 28th Jan 1927 | Box 65 \ 4 scan0197 | |
| Experiments with solid friction dampers to reduce torsional vibration in engines. | 28th Jan 1927 | Box 65 \ 4 scan0198 | |
| Comparative table of stiffness and inertia properties for various engine models. | 19th May 1927 | Box 65 \ 4 scan0199 | |
| Potential solution for sticking crankshaft friction dampers by enclosing the unit in an oil-filled slipper flywheel. | 19th May 1927 | Box 65 \ 4 scan0200 | |
| The Phantom lightened crankshaft and G.1. type spring drive. | 24th Sep 1927 | Box 65 \ 4 scan0201 | |
| Testing modified Phantom engine components, including the crankshaft and exhaust manifold. | 11th Nov 1927 | Box 65 \ 4 scan0202 | |
| High-speed engine vibrations, particularly around the crankshaft's critical speed and the influence of main bearings. | 1st Nov 1927 | Box 65 \ 4 scan0203 | |
| Technical analysis of engine crankcase design and its effects on engine periods and behaviour. | 11th Nov 1927 | Box 65 \ 4 scan0204 | |
| Request to machine a second key-way on a crankshaft for testing due to high stress on the single key-way. | 11th Nov 1927 | Box 65 \ 4 scan0205 | |
| Replacing case-hardened piston pins and confirming the increased stiffness of the latest 20 HP crankshaft. | 21th Nov 1927 | Box 65 \ 4 scan0206 | |
| Principles of crankshaft stiffness and design considerations for journals, webs, and pins. | 23th Nov 1927 | Box 65 \ 4 scan0207 | |
| Air Ministry's empirical formula for crankshaft stiffness and comparing calculated versus test results. | 24th Nov 1927 | Box 65 \ 4 scan0208 | |
| Empirical formula and data for crankshaft stiffness in bearings. | 23th Nov 1927 | Box 65 \ 4 scan0209 | |
| Revisions to the crankshaft and connecting rods for EAC.10 and 14 models. | 25th Nov 1927 | Box 65 \ 4 scan0210 | |
| Test report on the 40/50 crankshaft damper settings on car 10-EX. | 12th Dec 1927 | Box 65 \ 4 scan0211 | |
| New Phantom crankshaft and its use in the F.2 series. | 6th Dec 1927 | Box 65 \ 4 scan0212 | |
| Issues and potential materials for crankshaft friction dampers on 40/50 & 20 HP engines. | 11th Jan 1928 | Box 65 \ 4 scan0213 | |
| Crankshaft damper issues, including stiction and a 'galloping' knock, and evaluating alternative materials like woven cotton and designs from competitors like Chrysler. | 14th Jan 1928 | Box 65 \ 4 scan0214 | |
| Requesting two latest type extra stiff crankshafts for the 20 HP and 40/50 models. | 31th Jan 1928 | Box 65 \ 4 scan0215 | |
| Materials and performance issues related to car engine crankshaft dampers. | 2nd Feb 1928 | Box 65 \ 4 scan0216 | |
| Table comparing the dimensional specifications for various engine crankshafts. | 2nd Feb 1928 | Box 65 \ 4 scan0217 | |
| Comparison table of crankshaft details for various engines. | 2nd Feb 1928 | Box 65 \ 4 scan0218 | |
| Comparative table of big end weights and dimensions for various engines. | 29th Feb 1928 | Box 65 \ 4 scan0219 | |
| Letter to Major B.C. Carter concerning crankshaft torsional vibrations and his formula. | 29th Feb 1928 | Box 65 \ 4 scan0220 | |
| The results and conclusions from recent work on crankshaft torsional vibrations. | 29th Apr 1928 | Box 65 \ 4 scan0221 | |
| Report page detailing the results of crankshaft stiffness tests for Phantom and 20 HP models, including the effects of removing bearings. | 29th Apr 1928 | Box 65 \ 4 scan0222 | |
| Crankshaft stiffness tests and calculations for various engines, including the 20 HP, Phantom, and F.XI aero engine. | 29th Apr 1928 | Box 65 \ 4 scan0223 | |
| Concluding page of a document, noting that test results are not yet available and offering further clarification. | 5th Mar 1928 | Box 65 \ 4 scan0224 | |
| Rigidity of crankshafts, specifically referencing the Stutz shaft design. | 5th Mar 1928 | Box 65 \ 4 scan0225 | |
| Letter to Major B.C. Carter regarding crankshaft torsional vibrations and stiffness formulas. | 1st May 1928 | Box 65 \ 4 scan0226 | |
| Report page detailing engine bearing stiffness measurements and discussing experimental procedures for crankshaft frequencies. | 25th Apr 1928 | Box 65 \ 4 scan0227 | |
| Technical memorandum detailing crankshaft lubrication requirements for chassis and aero engines. | 25th Apr 1928 | Box 65 \ 4 scan0228 | |
| Lubrication of crankshafts for aero and car engines, including proposed modifications. | 28th Apr 1928 | Box 65 \ 4 scan0229 | |
| Letter discussing crankshaft dimensions, test results, and a formula for estimating torsional periods. | 3rd May 1928 | Box 65 \ 4 scan0230 | |
| Letter discussing additions to Carter's formula for a 6-cylinder engine and electrical excitation experiments. | 3rd May 1923 | Box 65 \ 4 scan0231 | |
| Visit to Cambridge Engineering Laboratory regarding research into crankshaft torsional vibration. | 3rd May 1923 | Box 65 \ 4 scan0232 | |
| Engine experiments, including running an Eagle VIII on gas and upcoming tests on a diesel engine for airships. | 1st Jul 1928 | Box 65 \ 4 scan0233 | |
| Modification to the oil tubes in F. & H. engines and chassis crankshafts to prevent contamination. | 1st Jul 1928 | Box 65 \ 4 scan0234 | |
| The stiffness and weight comparison of a large pin crankshaft against standard shafts. | 29th Aug 1929 | Box 65 \ 4 scan0235 | |
| Secret memorandum concerning instructions for a spring drive and slipper wheel. | 1st Jan 1925 | Box 65 \ 4 scan0236 | |
| Notes on the assembly of the EAC Spring Drive and Slipper Wheel. | 1st Jan 1925 | Box 65 \ 4 scan0237 | |
| Flywheel washers, friction load checking, and spring drive fitting. | 31th Jan 1925 | Box 65 \ 4 scan0238 | |
| Instructions for fitting the spring drive, crankshaft, and wheelcase components. | 25th Sep 1924 | Box 65 \ 4 scan0239 | |
| Efficiency of the Spring Drive Driving Spring, suggesting a report from the Test Department. | 16th Mar 1925 | Box 65 \ 4 scan0240 | |
| Request for the strengths of torsion and friction springs for a damped spring drive pendulum lever. | 10th Jul 1925 | Box 65 \ 4 scan0241 | |
| Issues with the New Phantom Spring Drives seizing and providing assembly instructions to prevent it. | 27th Nov 1925 | Box 65 \ 4 scan0242 | |
| The failure of the fixing of the Phantom spring drive. | 1st Nov 1925 | Box 65 \ 4 scan0243 | |
| Issues with seizing New Phantom spring drives and providing assembly recommendations. | 27th Nov 1925 | Box 65 \ 4 scan0244 | |
| The failure of the Phantom Spring Drive fixing and outlining corrective actions. | 2nd Dec 1925 | Box 65 \ 4 scan0245 | |
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