| Description | Date | Identifier | |
| Correspondence with General Motors about a harmonic balancer. | 15th Jan 1927 | Box 25 \ 3 Scan229 | |
| Communication with General Motors about a harmonic balancer. | 28th Jan 1927 | Box 25 \ 3 Scan230 | |
| Cover letter to the Royal Aeronautical Society submitting expanded remarks on the Carter paper for publication in their Journal. | 28th Jan 1927 | Box 25 \ 3 Scan231 | |
| Experiences and findings related to crankshaft vibrations in multi-crank engines. | 28th Jan 1927 | Box 25 \ 3 Scan232 | |
| Analysis of experiments on solid friction dampers and their effect on engine vibration. | 22th Feb 1927 | Box 25 \ 3 Scan233 | |
| Letter from the Royal Aircraft Establishment concerning Torsional Vibration and the Oakland Balancer. | 22th Feb 1927 | Box 25 \ 3 Scan234 | |
| Competitor's patent for a crankshaft damper similar to an existing internal design. | 24th Feb 1927 | Box 25 \ 3 Scan235 | |
| Examination of the Lorraine Dietrich crankshaft and its synchronous speeds, including vibration and torsion stiffness tests. | 1st Mar 1927 | Box 25 \ 3 Scan236 | |
| Experiments related to crankshaft torsional vibrations, inertia, and synchronous speed on Goshawk and Lorraine engines. | 9th Oct 1933 | Box 25 \ 3 Scan237 | |
| Graph comparing the crankshaft stiffness and torsional deflection curves for a standard 20 HP and a Lorraine-Dietrich crankshaft. | 29th Oct 1925 | Box 25 \ 3 Scan238 | |
| Fitting a slipper wheel to a Lorraine Dietrich car to damp torsional vibration and eliminate harmonics. | 1st Mar 1927 | Box 25 \ 3 Scan239 | |
| Patentability concerns regarding a crankshaft damper in comparison to a Lanchester design. | 12th Apr 1927 | Box 25 \ 3 Scan240 | |
| Crankshaft damper and its relation to a Lanchester patent. | 16th Apr 1927 | Box 25 \ 3 Scan241 | |
| Torsional vibrations and vibration dampers for the 20 HP engine. | 22th Apr 1927 | Box 25 \ 3 Scan242 | |
| Comparison of the RR friction damper and the Summers Harmonic Balancer for reducing engine vibrations. | 22th Apr 1927 | Box 25 \ 3 Scan243 | |
| Report discussing crankshaft vibration, harmonics, and the comparison of a standard 20 HP engine with a model 1-G-1 fitted with a damper. | 22th Apr 1927 | Box 25 \ 3 Scan244 | |
| Engine vibration, the master period, and the inertia of the crankshaft assembly. | 22th Apr 1927 | Box 25 \ 3 Scan245 | |
| Technical analysis comparing the inertia and stiffness of crankshaft components for the 20 HP and 1-G-1 models. | 22th Apr 1927 | Box 25 \ 3 Scan246 | |
| Technical document detailing calculations and principles of crankshaft stiffness and vibration. | 22th Apr 1927 | Box 25 \ 3 Scan247 | |
| Comparison of crankshaft assembly inertia and stiffness between a Lorraine Dietrich engine and a 20 HP engine. | 22th Apr 1927 | Box 25 \ 3 Scan248 | |
| Comparison of crankshaft inertia and stiffness, particularly between four-bearing and seven-bearing types. | 22th Apr 1927 | Box 25 \ 3 Scan249 | |
| Technical analysis of engine crankshaft vibration, comparing it to the Goshawk engine and discussing damping methods. | 22th Apr 1927 | Box 25 \ 3 Scan250 | |
| Technical discussion on high-speed engine design, focusing on crankshaft stiffness, inertia, and dampers. | 22th Apr 1927 | Box 25 \ 3 Scan251 | |
| Analysis of engine vibration, dampers, and crankshaft stiffness for the 20 HP engine. | 22th Apr 1927 | Box 25 \ 3 Scan252 | |
| Analysis of crankshaft harmonic vibrations and firing impulses in a six-cylinder engine. | 22th Apr 1927 | Box 25 \ 3 Scan253 | |
| Technical analysis of shaft and crankshaft harmonics and expected vibration speeds. | 22th Apr 1927 | Box 25 \ 3 Scan254 | |
| Calculations for the periodicity and frequency of a Lorraine Dietrich crankshaft. | 25th Apr 1927 | Box 25 \ 3 Scan255 | |
| Internal room stamp from Derby on an otherwise blank page. | 25th Apr 1927 | Box 25 \ 3 Scan256 | |
| Diagram showing the amplitude of oscillation due to harmonics of gas pressure torque at full throttle for an engine without a damper. | 10th Apr 1927 | Box 25 \ 3 Scan257 | |
| Page featuring a 'Print Room' date stamp. | 25th Apr 1927 | Box 25 \ 3 Scan258 | |
| Mr. Lanchester's patent for a crankshaft damper and potential prior art. | 11th May 1927 | Box 25 \ 3 Scan259 | |
| Letter from F.H. Royce to A. W. Claremont discussing Mr. Lanchester's 1925 patented crankshaft damper. | 13th May 1927 | Box 25 \ 3 Scan260 | |
| Solution for crankshaft and friction dampers sticking in slipper drives. | 19th May 1927 | Box 25 \ 3 Scan261 | |
| Outlining the required parts to complete tests on a crankshaft vibration damper. | 28th Jun 1927 | Box 25 \ 3 Scan262 | |
| Steering column vibrations on the 10-EX model, suggesting a stiffer column as a solution. | 2nd Jul 1927 | Box 25 \ 3 Scan263 | |
| Fitting a 1.G.1. type spring drive damper to a G.11 engine to ascertain its value and compare it to standard drives. | 1st Jul 1927 | Box 25 \ 3 Scan264 | |
| Comparative analysis table and discussion on the inertia, torque, and stiffness for different drive systems. | 1st Jul 1927 | Box 25 \ 3 Scan265 | |
| Report page comparing a G.1. type damper with a standard slipper wheel regarding engine performance and crankshaft safety. | 15th Jul 1927 | Box 25 \ 3 Scan266 | |
| Requesting to test a second crankshaft damper with improved plates and a larger flywheel on a 20 HP test bed engine. | 15th Jul 1927 | Box 25 \ 3 Scan267 | |
| Design changes for the India 3 crankshaft damper and timing gear spring drive. | 1st Sep 1927 | Box 25 \ 3 Scan268 | |
| Design and balance of 'Straight Eight' and Hispano Six engines. | 9th Sep 1927 | Box 25 \ 3 Scan269 | |
| Proposed modifications to the Sports Phantom Engine crankchamber. | 9th Sep 1927 | Box 25 \ 3 Scan270 | |
| Modifications to the damper and crankshaft for the Phantom Sports model to address roughness at very high revs. | 20th Sep 1927 | Box 25 \ 3 Scan271 | |
| Modifications to the Sports Phantom slipper flywheel, including reduced diameter and changes to the driving springs. | 10th Oct 1927 | Box 25 \ 3 Scan272 | |
| Body mounting techniques using rubber seatings to reduce engine vibrations and road shocks. | 1st Oct 1927 | Box 25 \ 3 Scan273 | |
| Request to obtain two different types of springs with detailed specifications. | 24th Oct 1927 | Box 25 \ 3 Scan274 | |
| Four-point rigid suspension system's effects on steering and engine vibration. | 28th Oct 1927 | Box 25 \ 3 Scan275 | |
| Test results of a combined spring drive and crankshaft damper on a 20 HP engine, comparing vibration levels. | 31th Oct 1927 | Box 25 \ 3 Scan276 | |
| Difficulties with keeping plates tight on splines and the effectiveness of a damper system. | 22th Apr 1927 | Box 25 \ 3 Scan277 | |
| Experiments with a spring drive to address issues with splines, resulting in an extended smooth running range. | 1st Nov 1927 | Box 25 \ 3 Scan278 | |
| Test results and findings on the 20 HP, G.1. type spring drive and its effect on engine harmonics. | 1st Nov 1927 | Box 25 \ 3 Scan279 | |
| Blueprint for an experimental spring-drive for the Goshawk-III engine. | 31th Oct 1927 | Box 25 \ 3 Scan280 | |
| Blank cover or backing page with an archival stamp from the Print Room. | 31th Oct 1927 | Box 25 \ 3 Scan281 | |
| High-speed engine vibrations, specifically issues related to crankshaft critical speed and main bearing distortion. | 1st Nov 1927 | Box 25 \ 3 Scan282 | |
| Racing engine crankcases and the performance of the 1-G-1 engine type. | 11th Nov 1927 | Box 25 \ 3 Scan283 | |
| Recommendation for a new engine suspension scheme to improve vehicle smoothness and reduce vibration. | 11th Nov 1927 | Box 25 \ 3 Scan284 | |
| Tests on a new engine suspension system using Hardy couplings to reduce vibration. | 1st Nov 1927 | Box 25 \ 3 Scan285 | |
| Blueprint showing the design for a rear engine mounting with a Hardy rubber-fabric coupling. | 9th Nov 1927 | Box 25 \ 3 Scan286 | |
| Heavily faded document with a red stamp from the Print Room. | 9th Nov 1927 | Box 25 \ 3 Scan287 | |
| Request to machine a second key-way on a test crankshaft due to high stress on the existing single key-way. | 11th Nov 1927 | Box 25 \ 3 Scan288 | |
| Request to borrow 20 HP crankshafts from the machining bay for a series of experimental tests. | 21th Nov 1927 | Box 25 \ 3 Scan289 | |
| Instructing modifications to a 10-EX damper, specifying new spring loads and the effect of slack. | 29th Nov 1927 | Box 25 \ 3 Scan290 | |
| Test report on a 40/50 crankshaft damper detailing experiments with varied loads to determine optimal damping. | 1st Dec 1927 | Box 25 \ 3 Scan291 | |
| Tests for a 20 HP crankshaft, detailing findings and proposed modifications to increase stiffness. | 12th Dec 1927 | Box 25 \ 3 Scan292 | |
| Engine performance, critical periods, and the strength of the 40/50 shaft. | 1st Dec 1927 | Box 25 \ 3 Scan293 | |
| The reduction in crankshaft torsional strength during machining operations. | 1st Dec 1927 | Box 25 \ 3 Scan294 | |
| Graph showing the results of a torsion test on a 20 HP crankshaft at various stages of machining, from forging to finished shaft. | 6th Dec 1927 | Box 25 \ 3 Scan295 | |
| Reverse of a document showing a print room stamp and a handwritten annotation. | 6th Dec 1927 | Box 25 \ 3 Scan296 | |
| Letter from the American branch to the UK branch regarding a new Chrysler Vibration Damper design. | 15th Dec 1927 | Box 25 \ 3 Scan297 | |
| Calculations regarding crankshaft stiffness, specifically the impact of increasing pin diameter and altering inertia. | 6th Dec 1927 | Box 25 \ 3 Scan298 | |
| Calculations and notes on crankshaft system inertia, stiffness, and shaft frequency. | 1st Jan 1928 | Box 25 \ 3 Scan299 | |
| The design and material considerations for 40/50 & 20 HP crankshaft friction dampers. | 1st Jan 1928 | Box 25 \ 3 Scan300 | |
| Issues with crankshaft damper stiction, a 'galloping' knock, and potential solutions including different materials and designs. | 14th Jan 1928 | Box 25 \ 3 Scan301 | |
| Engine mounting test for torque reaction, detailing severe vibration issues. | 24th Jan 1928 | Box 25 \ 3 Scan302 | |
| Graph showing the load vs deflection for torque reaction fixed mounting rubber blocks at the front. | 24th Jan 1928 | Box 25 \ 3 Scan303 | |
| The back of a document with a purple 'Print Room' receiving stamp from Derby. | 24th Jan 1928 | Box 25 \ 3 Scan304 | |
| Torque reaction problems on a sports car resulting from tests with different engine mountings and configurations. | 24th Jan 1928 | Box 25 \ 3 Scan305 | |
| Testing a rubber block fitted to the dashboard to address torque reaction and vibrations. | 25th Jan 1928 | Box 25 \ 3 Scan306 | |
| Materials for crankshaft damper friction surfaces and flywheel vibration. | 2nd Feb 1928 | Box 25 \ 3 Scan307 | |
| Experiments and proposals for engine mounting to manage torque and vibrations. | 4th Feb 1928 | Box 25 \ 3 Scan308 | |
| Use of cork in crankshaft dampers, detailing issues with agglomerated cork and suggesting alternative solutions. | 9th Feb 1928 | Box 25 \ 3 Scan309 | |
| Notes on the calculation of crankshaft periods using Carter's Formula. | 2nd Feb 1928 | Box 25 \ 3 Scan310 | |
| The prediction of periods for crankshaft torsional vibrations. | 7th Feb 1928 | Box 25 \ 3 Scan311 | |
| Worked example of a calculation for the torsional stiffness of one crank for the standard Phantom shaft using Carter's Formula. | 7th Feb 1928 | Box 25 \ 3 Scan312 | |
| Calculation of crankshaft torsional stiffness and deflection for main bearings, comparing calculated figures with tested stiffness. | 7th Feb 1928 | Box 25 \ 3 Scan313 | |
| Crankshaft stiffness, discussing modifications to Carter's Formula and referencing test results. | 7th Feb 1928 | Box 25 \ 3 Scan314 | |
| Page detailing the calculation and measurement of moments of inertia for crankshafts and the calculation of periodic speeds. | 7th Feb 1928 | Box 25 \ 3 Scan315 | |
| Technical document detailing the calculation of crankshaft vibration frequency and critical speed. | 7th Feb 1928 | Box 25 \ 3 Scan316 | |
| Calculation and discussion of engine critical speed based on component inertia and stiffness. | 29th Feb 1928 | Box 25 \ 3 Scan317 | |
| Letter to Major B.C. Carter of the R.A.E. discussing results on crankshaft torsional vibrations. | 29th Feb 1928 | Box 25 \ 3 Scan318 | |
| Results of recent work on crankshaft torsional vibrations and stiffness. | 29th Apr 1928 | Box 25 \ 3 Scan319 | |
| Crankshaft stiffness and torsion tests for Phantom and 20 HP models. | 29th Apr 1928 | Box 25 \ 3 Scan320 | |
| Report page discussing crankshaft stiffness, inertia calculations, and test results for various engines. | 29th Apr 1928 | Box 25 \ 3 Scan321 | |
| The final page of a letter awaiting test results and offering further clarification. | 2nd Mar 1928 | Box 25 \ 3 Scan322 | |
| Damping scheme for engine torque vibrations, which refers to an external sketch. | 2nd Mar 1928 | Box 25 \ 3 Scan323 | |
| Crankshaft rigidity, with reference to the Stutz shaft and damping harmonics. | 5th Mar 1928 | Box 25 \ 3 Scan324 | |
| Table of calculations for crankshaft stiffness based on a suggested empirical formula, compared with test results. | 3rd May 1928 | Box 25 \ 3 Scan325 | |
| Query regarding the design of a car engine damper to have both dry friction and lubrication. | 3rd May 1928 | Box 25 \ 3 Scan326 | |
| Engine suspension flexibility using rubber and the proposed trial of torsional dampers. | 9th Mar 1928 | Box 25 \ 3 Scan327 | |
| Design, materials, and patenting of a corrugated disc damper flywheel. | 9th Mar 1928 | Box 25 \ 3 Scan328 | |
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