| Description | Date | Identifier | |
| Issues with a disc crankshaft design, focusing on bearing wear and vibrations in a 20 HP car. | 26th Nov 1924 | Box 25 \ 3 Scan129 | |
| Communication about sending a blueprint for a modified, stiffer crankshaft. | 17th Dec 1924 | Box 25 \ 3 Scan130 | |
| Test report on engine vibrations without a slipper wheel for a 48-PK car with a standard 40/50 engine. | 17th Dec 1924 | Box 25 \ 3 Scan131 | |
| Paper from Mr. Whipple of Cambridge Instrument Company regarding a Vibrograph and Torsion meter. | 15th May 1925 | Box 25 \ 3 Scan132 | |
| High-speed engine vibrations, termed 'engine sting', found in the 'New Phantom' chassis. | 3rd Oct 1925 | Box 25 \ 3 Scan133 | |
| Elimination of noise in machinery, following up on an interview with Standard Telephones & Cables Ltd. | 16th Aug 1926 | Box 25 \ 3 Scan134 | |
| Test drive report for car 12-EX detailing feedback on steering, ignition timing, suspension, and engine vibration. | 22th Jul 1926 | Box 25 \ 3 Scan135 | |
| Letter from Standard Telephones and Cables Limited discussing a device for the elimination of noise in machinery. | 13th Aug 1926 | Box 25 \ 3 Scan136 | |
| Page two of a letter from Standard Telephones & Cables Limited regarding securing rights for an invention. | 13th Aug 1926 | Box 25 \ 3 Scan137 | |
| Proposing a visit to discuss tests investigating high-speed vibration on a 20 HP engine. | 7th Sep 1926 | Box 25 \ 3 Scan138 | |
| Experiments comparing crankshaft vibrations between the Phantom and 20 HP engines. | 20th Sep 1926 | Box 25 \ 3 Scan139 | |
| Experiments to reduce crankshaft vibrations by adjusting damping torque and friction on slipper wheels. | 20th Sep 1926 | Box 25 \ 3 Scan140 | |
| Analysis of engine vibrations and friction torque from preliminary tests on the Phantom model. | 20th Sep 1926 | Box 25 \ 3 Scan141 | |
| Report page detailing experiments on engine vibrations and the effects of damping friction on the 20 HP model. | 20th Sep 1926 | Box 25 \ 3 Scan142 | |
| Tests on engine vibration, focusing on damping friction and the effect of piston position and weight. | 20th Sep 1926 | Box 25 \ 3 Scan143 | |
| Crankshaft vibration testing, comparing a stiffer crankshaft to a standard one and detailing future tests. | 18th Sep 1926 | Box 25 \ 3 Scan144 | |
| Goshawk III crankshaft torsional vibration diagrams without damper wheels. | 18th Sep 1926 | Box 25 \ 3 Scan145 | |
| Page stamped by the Print Room in Derby. | 20th Sep 1926 | Box 25 \ 3 Scan146 | |
| Experiments to determine the torsional deflection and rigidity of a Phantom crankshaft. | 9th Sep 1926 | Box 25 \ 3 Scan147 | |
| Calculation sheet page detailing the weight and polar moment of inertia for various engine components and discussing oscillation and nodal points. | 9th Sep 1926 | Box 25 \ 3 Scan148 | |
| Engine vibration, critical speed calculations, and crankshaft performance for the Phantom and 20 HP models. | 9th Sep 1926 | Box 25 \ 3 Scan149 | |
| Graph plotting the torsional deflection of a standard Phantom crankshaft against applied torque. | 1st Oct 1926 | Box 25 \ 3 Scan150 | |
| Vibration issues and general road test feedback for car 12-EX. | 1st Oct 1926 | Box 25 \ 3 Scan151 | |
| Follow-up memo regarding the elimination of noise in machinery. | 4th Oct 1926 | Box 25 \ 3 Scan152 | |
| Patent for noise elimination, suggesting collaboration with Dunlop on tyre noises. | 10th Oct 1926 | Box 25 \ 3 Scan153 | |
| Letter to Major B.C. Carter of the Air Ministry acknowledging his comments on document E.3039A. | 1st Nov 1926 | Box 25 \ 3 Scan154 | |
| Analysing a competitor's vehicle, the 20 HP Lorraine Deitritch. | 2nd Nov 1926 | Box 25 \ 3 Scan155 | |
| Letter to Major B. C. Carter of the Air Ministry regarding a report on Crankshaft Torsional Vibration tests. | 4th Nov 1926 | Box 25 \ 3 Scan156 | |
| Torsional deflection and polar moment of inertia experiments for the Phantom crankshaft. | 4th Nov 1926 | Box 25 \ 3 Scan157 | |
| Analysis of crankshaft oscillation, nodal points, and critical speeds in different engine models. | 8th Nov 1926 | Box 25 \ 3 Scan158 | |
| Requesting Mean Effective Pressure and valve spring details for 20 HP and 40/50 engines. | 8th Nov 1926 | Box 25 \ 3 Scan159 | |
| The limitations on increasing Mean Effective Pressure (MEP) due to engine detonation and reaction vibrations. | 9th Nov 1926 | Box 25 \ 3 Scan160 | |
| Experiments to reduce torsional vibrations on the 20 HP and Phantom engines by modifying the flywheel mounting. | 9th Nov 1926 | Box 25 \ 3 Scan161 | |
| Analysis of crankshaft vibration, critical speed, and damping effects of a non-rigid flywheel. | 9th Nov 1926 | Box 25 \ 3 Scan162 | |
| Page of a report discussing crankshaft resonance, flywheel friction effects, and torsional vibrations related to the Phantom model engine. | 9th Nov 1926 | Box 25 \ 3 Scan163 | |
| Analysis of engine vibration, comparing the crankshaft rigidity and damping characteristics of the 20 HP and Phantom engines. | 9th Nov 1926 | Box 25 \ 3 Scan164 | |
| Analysis of viscous-friction and centrifugal dampers for reducing engine vibrations and harmonics. | 9th Nov 1926 | Box 25 \ 3 Scan165 | |
| Conclusion of an investigation into crankshafts, finding the method reliable and in agreement with practice observations. | 9th Nov 1926 | Box 25 \ 3 Scan166 | |
| Diagram showing experiments on the friction mounting of a flywheel to a 20 HP crankshaft. | 9th Nov 1926 | Box 25 \ 3 Scan167 | |
| Reverse side of a document showing a Print Room stamp from Derby. | 9th Nov 1926 | Box 25 \ 3 Scan168 | |
| Graph comparing torsional vibration amplitudes of the Goshawk and Phantom engines at critical speed. | 10th Nov 1926 | Box 25 \ 3 Scan169 | |
| Graph of torsional vibrations, showing the reduction in amplitude with a decrease in the frictional mounting of the flywheel. | 20th Nov 1939 | Box 25 \ 3 Scan170 | |
| Polar diagram comparing the crankshaft oscillations of the 20-HP and Phantom models at the speed of resonance. | 9th Nov 1926 | Box 25 \ 3 Scan171 | |
| Letter from the Air Ministry regarding a report on the 40/50 HP engine and another paper. | 9th Nov 1926 | Box 25 \ 3 Scan172 | |
| Request for a description of how the 'Harmonic Balancer' on Oakland and Buick cars functions. | 11th Nov 1926 | Box 25 \ 3 Scan173 | |
| Cover memo for a report on Torsional Vibration. | 11th Nov 1926 | Box 25 \ 3 Scan174 | |
| Experiments to reduce crankshaft torsional vibrations in 20 HP and Phantom engines using a non-rigidly mounted flywheel. | 9th Nov 1926 | Box 25 \ 3 Scan175 | |
| Flywheel and torsional vibration experiments, including analysis of the Phantom model. | 9th Nov 1926 | Box 25 \ 3 Scan176 | |
| Engine vibration, damping, and damper design, comparing the Phantom and 20 HP models. | 9th Nov 1926 | Box 25 \ 3 Scan177 | |
| Page describing a method for estimating the resonant speeds of six-cylinder crankshafts. | 13th Nov 1926 | Box 25 \ 3 Scan178 | |
| Letter from the American office to Derby discussing crankshaft vibrations and Mobiloil A tests. | 13th Nov 1926 | Box 25 \ 3 Scan179 | |
| Covering memo forwarding a copy of a letter addressed to Major Carter and Mr. Lovesey's reply. | 23th Nov 1926 | Box 25 \ 3 Scan180 | |
| Cover letter to Major B.C. Carter of the Air Ministry, forwarding an attached note written by Mr. Lovesey. | 23th Nov 1926 | Box 25 \ 3 Scan181 | |
| Letter responding to Major Carter's query about running six-cylinder car engines without a damper. | 22th Nov 1926 | Box 25 \ 3 Scan182 | |
| Internal engine damping, vibration experiments, and a potential visit from Major Carter. | 24th Nov 1926 | Box 25 \ 3 Scan183 | |
| Request for information on crankshaft vibrations from General Motors. | 24th Nov 1926 | Box 25 \ 3 Scan184 | |
| Letter to General Motors Ltd. requesting information on their torsional vibration damper technology. | 22th Nov 1926 | Box 25 \ 3 Scan185 | |
| Series of questions regarding the theory and effectiveness of damper action on engine vibrations. | 25th Nov 1926 | Box 25 \ 3 Scan186 | |
| Test results of a Packard Straight 8 car and its comparison to the company's 6-cylinder engines. | 25th Nov 1926 | Box 25 \ 3 Scan187 | |
| Letter from the Air Ministry discussing engine damping, torque variation, and resonance in response to a note from Mr. Lovesey. | 30th Nov 1926 | Box 25 \ 3 Scan188 | |
| Letter discussing the characteristics of a friction damper in a six-crank engine and enclosing related notes. | 2nd Dec 1926 | Box 25 \ 3 Scan189 | |
| The 'Summers Vibration Damper' and arranging a meeting with a General Motors representative for a full explanation. | 2nd Dec 1926 | Box 25 \ 3 Scan190 | |
| Meeting to discuss the theory of the Summers Vibration Damper. | 3rd Dec 1926 | Box 25 \ 3 Scan191 | |
| Arranging travel for Mr. Kennington to Derby regarding the Summers Vibration Damper. | 8th Dec 1926 | Box 25 \ 3 Scan192 | |
| Letter to E. W. Hives regarding a Harmonic Balancer, enclosing a letter from General Motors. | 9th Dec 1926 | Box 25 \ 3 Scan193 | |
| Letter from General Motors to Rolls-Royce of America regarding a request for information on a harmonic balancer. | 6th Dec 1926 | Box 25 \ 3 Scan194 | |
| Series of questions regarding the operation and effects of a harmonic balancer. | 16th Dec 1926 | Box 25 \ 3 Scan195 | |
| Letter from consulting engineer W.O. Kennington to E. Hives discussing a visit to Derby, Mr. Carter's work, and crankshaft dampers. | 16th Dec 1926 | Box 25 \ 3 Scan196 | |
| The concluding page of a letter to Mr. Hives regarding vibration. | 16th Dec 1926 | Box 25 \ 3 Scan197 | |
| Letter to Major Carter discussing engine damping, resonance, and the 'Harmonic Balancer'. | 18th Dec 1926 | Box 25 \ 3 Scan198 | |
| Engine vibration, damper effectiveness, and a proposal to test a new elastically driven damper design. | 18th Dec 1926 | Box 25 \ 3 Scan199 | |
| Proposed tests on crankshaft stiffness, inertia, and motion using a torsiograph. | 18th Dec 1926 | Box 25 \ 3 Scan200 | |
| Letter to the Air Ministry comparing engine damping characteristics and discussing 'Harmonic Balancers'. | 18th Dec 1926 | Box 25 \ 3 Scan201 | |
| Engine vibration, dampers, and plans for testing a new elastically driven damper design. | 18th Dec 1926 | Box 25 \ 3 Scan202 | |
| Proposal for testing crankshaft stiffness and damper inertia, with plans to use a torsiograph. | 20th Dec 1926 | Box 25 \ 3 Scan203 | |
| Letter from consulting engineer W.O. Kennington regarding an Adex Stabiliser sample. | 20th Dec 1926 | Box 25 \ 3 Scan204 | |
| Letter discussing the performance of friction type dampers versus flexibly driven 'Harmonic Balancers' for eliminating torsional vibrations. | 20th Dec 1926 | Box 25 \ 3 Scan205 | |
| Technical comparison of crankshaft dampers and a request for the patent specification of the 'Summers Balancer'. | 20th Dec 1926 | Box 25 \ 3 Scan206 | |
| Letter to Mr. Kennington discussing the effectiveness of different engine damper types in eliminating torsional vibrations. | 20th Dec 1926 | Box 25 \ 3 Scan207 | |
| Letter discussing the limitations of friction type engine dampers and requesting information on the 'Summers Balancer'. | 22th Dec 1926 | Box 25 \ 3 Scan208 | |
| Letter from consulting engineer W.O. Kennington to E.W. Hives acknowledging a previous letter. | 22th Dec 1926 | Box 25 \ 3 Scan209 | |
| Experiments for the Phantom front axle control, suggesting an increase in lever length. | 23th Dec 1926 | Box 25 \ 3 Scan210 | |
| Recommending an employee attend a lecture on torsional crankshaft vibrations. | 10th Jan 1927 | Box 25 \ 3 Scan211 | |
| Letter concerning the Summers Vibration Damper, enclosing correspondence from America and mentioning General Motors. | 11th Jan 1927 | Box 25 \ 3 Scan212 | |
| Extract of a letter from Henry M. Crane regarding a request for information on harmonic balancers. | 6th Dec 1926 | Box 25 \ 3 Scan213 | |
| Letter to H.M. Crane discussing the working principle of a torsional vibration damper. | 25th Nov 1926 | Box 25 \ 3 Scan214 | |
| The theory and effectiveness of crankshaft vibration dampers. | 15th Dec 1926 | Box 25 \ 3 Scan215 | |
| Letter from General Motors discussing crankshaft anti-vibration devices and torsional vibration studies. | 15th Dec 1926 | Box 25 \ 3 Scan216 | |
| The principles and application of a harmonic balancer on a shaft. | 15th Dec 1926 | Box 25 \ 3 Scan217 | |
| Letter discussing the operation of a balancer and its effect on vibration frequency. | 15th Dec 1926 | Box 25 \ 3 Scan218 | |
| Letter from General Motors Corporation discussing harmonic balancers and engine design. | 10th Dec 1926 | Box 25 \ 3 Scan219 | |
| Letter from Henry M. Crane discussing engine design philosophy for low-priced cars. | 10th Dec 1926 | Box 25 \ 3 Scan220 | |
| Instructing the Stores to despatch an ADEX Stabiliser to Mr. W.O. Kennington. | 30th Dec 1926 | Box 25 \ 3 Scan221 | |
| Letter to Major Carter regarding a General Motors harmonic balancer and requesting a paper on 'Torsional Vibrations'. | 14th Jan 1927 | Box 25 \ 3 Scan222 | |
| Crankshaft torsional vibrations, referencing General Motors' Harmonic Balancer and internal investigations on the G.1. engine. | 14th Jan 1927 | Box 25 \ 3 Scan223 | |
| Letter from General Motors to Rolls-Royce discussing the harmonic balancer and engine design. | 10th Dec 1926 | Box 25 \ 3 Scan224 | |
| Continued letter from Henry M. Crane discussing engine damping devices and a reference to London fog. | 15th Dec 1926 | Box 25 \ 3 Scan225 | |
| Letter from General Motors regarding crankshaft harmonic balancers and torsional vibration. | 15th Dec 1926 | Box 25 \ 3 Scan226 | |
| Study on the operation and phase relations of a shaft and balancer system to control vibration. | 15th Dec 1926 | Box 25 \ 3 Scan227 | |
| Technical discussion on the effects of a balancer on shaft vibration and frequency. | 15th Jan 1927 | Box 25 \ 3 Scan228 | |
| | | | |
