| Description | Date | Identifier | |
| Specification for the '32 cwt' Comet, detailing modifications and estimated weight savings. | 3rd Jul 1940 | Box 132 \ 2 scan0139 | |
| Continuation of a specification list for the '32 cwt' Comet, detailing components and their estimated weight savings. | 3rd Jul 1940 | Box 132 \ 2 scan0140 | |
| Specification continuation document for the '32 cwt' Comet model, detailing weight savings. | 10th Jul 1941 | Box 132 \ 2 scan0141 | |
| Plan to build the lightest possible 8-cylinder motor car based on the Corniche chassis. | 10th Jul 1941 | Box 132 \ 2 scan0142 | |
| Specification of alterations and anticipated weight savings for a 15 B.V. 32 CWT. Car. | 10th Jul 1941 | Box 132 \ 2 scan0143 | |
| List of alterations to a standard model with corresponding anticipated weight savings. | 10th Jul 1941 | Box 132 \ 2 scan0144 | |
| List of alterations to the 11 B.V. Standard model, detailing the anticipated weight savings for each modification. | 10th Jul 1941 | Box 132 \ 2 scan0145 | |
| List of alterations to a standard model and the corresponding anticipated weight savings. | 10th Jul 1941 | Box 132 \ 2 scan0146 | |
| Anticipated weight savings from alterations to a standard design and future post-war modifications. | 13th Mar 1944 | Box 132 \ 2 scan0147 | |
| Photographing and weighing of parts from a disassembled 14 HP Hillman Gearbox. | 13th Mar 1944 | Box 132 \ 2 scan0148 | |
| Weight analysis of components for the Hillman 14 HP gearbox and actuating mechanism. | 13th Mar 1944 | Box 132 \ 2 scan0149 | |
| Parts list for gearbox and clutch components detailing quantities, materials, references, and weights. | 13th Mar 1944 | Box 132 \ 2 scan0150 | |
| Exploded view photograph of a mechanical assembly with its constituent parts numbered. | 13th Mar 1944 | Box 132 \ 2 scan0151 | |
| Photo weight analysis document for a Hillman 14 HP gearbox, detailing the B gears and shafts. | 13th Mar 1944 | Box 132 \ 2 scan0152 | |
| Weight and materials schedule for gearbox and clutch components, continued from a previous page. | 13th Mar 1944 | Box 132 \ 2 scan0153 | |
| Exploded view photograph of gearbox components, each numbered for identification. | 22th Feb 1939 | Box 132 \ 2 scan0154 | |
| Calculations of force and oscillation on a Straight 8 engine camshaft wheel. | 22th Feb 1939 | Box 132 \ 2 scan0155 | |
| Calculations for the crankshaft's torsional frequency and vibration amplitudes for a 3 Litre 6 Cylinder engine. | 11th Jan 1940 | Box 132 \ 2 scan0156 | |
| Reliability and application of Studebaker-type crankshaft dampers. | 17th Feb 1940 | Box 132 \ 2 scan0157 | |
| Requesting research into dynamic balancing machines for crankshafts and complete engines. | 4th Mar 1940 | Box 132 \ 2 scan0158 | |
| Letter from W. & T. Avery Ltd. regarding their Avery-Schenck range of Dynamic Balancing Machines. | 27th Mar 1940 | Box 132 \ 2 scan0159 | |
| Brochure detailing the features of Avery-Schenck dynamic balancing machines. | 1st Jul 1939 | Box 132 \ 2 scan0160 | |
| Brochure detailing three types of Avery-Schenck rapid dynamic balancing machines. | 1st Jul 1939 | Box 132 \ 2 scan0161 | |
| Confirming the arrival of undersized crankshaft forgings from America and instructions for their urgent machining and testing. | 30th Mar 1940 | Box 132 \ 2 scan0162 | |
| The unmachinability of 4-carbon crankshafts due to high Brinell hardness and the required tempering treatment. | 30th Mar 1940 | Box 132 \ 2 scan0163 | |
| Requesting a detailed drawing for a crankshaft based on a Lincoln-Zephyr sample, with a list of specifications. | 5th Apr 1940 | Box 132 \ 2 scan0164 | |
| Instruction specifying the heat treatment for crank forgings to a Brinell hardness of 241-269. | 5th Apr 1940 | Box 132 \ 2 scan0165 | |
| Replacement of a cast iron fan pulley to eliminate squeaks on a B40 engine crankshaft. | 9th Apr 1940 | Box 132 \ 2 scan0166 | |
| The dispatch of drawings for a B.60 Crankshaft with integral balance weights. | 24th Apr 1940 | Box 132 \ 2 scan0167 | |
| The production of crankshaft R.E.869, including supplier and component fitting instructions. | 16th May 1940 | Box 132 \ 2 scan0168 | |
| Clarifying that Hykro crankshafts were used experimentally on Bentley and Phantom III models, but not in production. | 22th May 1940 | Box 132 \ 2 scan0169 | |
| Poor physical test results and machining difficulties with carbon steel crankshafts, suggesting improved normalising. | 30th May 1940 | Box 132 \ 2 scan0170 | |
| Letter to Humber Motors Ltd. regarding crankshaft damper performance and requesting information. | 29th Aug 1940 | Box 132 \ 2 scan0171 | |
| File divider for 'Crankshafts General' with cross-references to other related files. | 15th Aug 1940 | Box 132 \ 2 scan0172 | |
| Letter to the Air Ministry confirming a request for funds to cover bearing alterations and a crankshaft shipment from America. | 15th Aug 1940 | Box 132 \ 2 scan0173 | |
| Letter from the Ministry of Aircraft Production regarding payment authorisation for bearings and crankshafts from the U.S.A. | 18th Aug 1940 | Box 132 \ 2 scan0174 | |
| Letter from Humber Limited to W.A. Robotham discussing crankshaft damper experiences and materials. | 2nd Sep 1940 | Box 132 \ 2 scan0175 | |
| Letter discussing damper stiction and suggesting modifications to damper rings and compression springs. | 24th Oct 1940 | Box 132 \ 2 scan0176 | |
| Technical memorandum on the torsional vibrations of a flat 12-cylinder engine crankshaft. | 24th Oct 1940 | Box 132 \ 2 scan0177 | |
| Engine vibration periods and crankshaft characteristics in 6 and 12-cylinder engines. | 26th Oct 1940 | Box 132 \ 2 scan0178 | |
| Technical discussion on engine vibration, harmonics, and damping in various engine types. | 26th Oct 1940 | Box 132 \ 2 scan0179 | |
| Moment of inertia of crankshaft dampers in relation to increased compression ratios, with reference to Buick and Bentley V8 engines. | 29th Oct 1940 | Box 132 \ 2 scan0180 | |
| Constraints of increasing the inertia of the B.80 crankshaft damper flywheel. | 1st Nov 1940 | Box 132 \ 2 scan0181 | |
| The position of a trunnion mounted jack. | 12th Nov 1940 | Box 132 \ 2 scan0182 | |
| Survey on crankshaft torsionals and vibration issues in 6-cylinder and flat-12 engines. | 7th Dec 1940 | Box 132 \ 2 scan0183 | |
| Summary of information and data regarding crankshaft torsionals for B.60 and flat 12 cylinder engines. | 9th Dec 1940 | Box 132 \ 2 scan0184 | |
| Comparison of 6/rev vibration amplitude between a flat 12-cylinder engine and a B.60 engine. | 26th Oct 1940 | Box 132 \ 2 scan0185 | |
| Analysis of engine vibration, harmonic orders, and damper settings for different engine configurations. | 26th Oct 1940 | Box 132 \ 2 scan0186 | |
| Analysis of engine vibration, comparing 12 and 6 cylinder engines and the effects of gas and inertia on B.60 torsionals. | 26th Oct 1940 | Box 132 \ 2 scan0187 | |
| Comparison table of weights and moments of inertia for B.60 and Flat 12 engine components. | 26th Oct 1940 | Box 132 \ 2 scan0188 | |
| Comparison of crankshaft equivalent lengths and natural frequencies for the B.60 and Phantom III engine systems. | 26th Oct 1940 | Box 132 \ 2 scan0189 | |
| Graph of torsional vibrations for a Flat 12 Cylinder 4 Stroke engine. | 26th Oct 1940 | Box 132 \ 2 scan0190 | |
| Graph of torsional vibrations against crankshaft RPM for a Flat 12 Cylinder 2 Stroke engine. | 26th Oct 1940 | Box 132 \ 2 scan0191 | |
| Graph of torsional vibration analysis for a B60 crankshaft against RPM. | 26th Oct 1940 | Box 132 \ 2 scan0192 | |
| Graph of torsional vibration amplitudes for a B60 crankshaft at different RPMs. | 26th Oct 1940 | Box 132 \ 2 scan0193 | |
| Graph plotting torsional vibration amplitude against crankshaft RPM, showing the separate effects of gas torque and inertia torque for a B60 engine. | 26th Oct 1940 | Box 132 \ 2 scan0194 | |
| Graph of B60 engine Mean Effective Pressure (M.E.P.) curve against RPM, used for torsional calculations. | 27th Jan 1941 | Box 132 \ 2 scan0195 | |
| Proposal for a Vee 8 C.I. 2-stroke tank engine, detailing crankshaft characteristics and performance. | 27th Jan 1941 | Box 132 \ 2 scan0196 | |
| Preliminary investigation and calculations for a proposed Vee 8 C.I. 2-stroke tank engine. | 22th Jan 1941 | Box 132 \ 2 scan0197 | |
| Analysis of inertia torque coefficients and the effect of a frictional tuned vibration absorber on 1 node vibrations. | 29th Aug 1940 | Box 132 \ 2 scan0198 | |
| Analysis of engine inertia loads, vibrations, and unbalanced forces for different crank configurations. | 29th Aug 1940 | Box 132 \ 2 scan0199 | |
| Calculations and conclusions regarding engine 2 node vibrations, stress, and torque. | 17th Feb 1941 | Box 132 \ 2 scan0200 | |
| Crankshaft torsional vibrations in B.60 and flat 12-cylinder engines. | 17th Feb 1941 | Box 132 \ 2 scan0201 | |
| Magnification factor at resonance, equilibrium stress, and comparing engine performance using mathematical expressions. | 17th Feb 1941 | Box 132 \ 2 scan0202 | |
| Analysis of crankshaft vibration, amplitude, and optimum torque settings for a friction damper. | 17th Feb 1941 | Box 132 \ 2 scan0203 | |
| Page discussing fundamental expressions for friction damper energy dissipation and engine vibration calculations. | 17th Feb 1941 | Box 132 \ 2 scan0204 | |
| Torque component vibration, engine speeds, and future design work for 6 and 12 cylinder engines. | 17th Feb 1941 | Box 132 \ 2 scan0205 | |
| Comments on a memo regarding crankshaft torsional vibrations in B.60 and Flat 12 engines. | 16th Dec 1940 | Box 132 \ 2 scan0206 | |
| Technical memorandum discussing engine vibration analysis, focusing on flat 12-cylinder engines and torque components. | 16th Dec 1940 | Box 132 \ 2 scan0207 | |
| Comparing the effect of a Humber type damper versus a Wraith type damper on crankshaft critical speed. | 28th Apr 1941 | Box 132 \ 2 scan0208 | |
| Analyzing the effect of various dampers on crankshaft critical speed and natural frequency. | 30th Apr 1941 | Box 132 \ 2 scan0209 | |
| Weight breakdown of damper parts for R.R. Wraith, Humber, and Studebaker types attached to a crankshaft. | 30th Apr 1941 | Box 132 \ 2 scan0210 | |
| The effect of a Humber type damper on the critical speed of a B.60 crankshaft. | 8th May 1941 | Box 132 \ 2 scan0211 | |
| Comparison of the Moments of Inertia for an R.R. Damper and a Humber type Damper. | 8th May 1941 | Box 132 \ 2 scan0212 | |
| Crankshaft dampers, engine vibration issues, and potential solutions. | 24th May 1941 | Box 132 \ 2 scan0213 | |
| Technical memo answering questions on lowering crankshaft critical speed by analysing connecting rod weights and damper types. | 12th Jun 1941 | Box 132 \ 2 scan0214 | |
| Pulley materials and their effect on crankshaft and camshaft critical speed. | 12th Jun 1941 | Box 132 \ 2 scan0215 | |
| Crankshaft dampers, rubber mounting pulleys, and connecting rod weight. | 17th Jun 1941 | Box 132 \ 2 scan0216 | |
| Properties and proposed testing of a Ferobestos pulley for a crankshaft. | 26th Jun 1941 | Box 132 \ 2 scan0217 | |
| Instruction to lighten the 8-cylinder crankshaft by boring out the journals. | 26th Jun 1941 | Box 132 \ 2 scan0218 | |
| Excessive weight of new connecting rods and proposing design modifications. | 17th Jun 1941 | Box 132 \ 2 scan0219 | |
| Letter requesting a supply of Ferodo Ferobestos 'L' material for a light crankshaft pulley. | 7th Aug 1941 | Box 132 \ 2 scan0220 | |
| Cracked crankshaft for an eight-cylinder engine and the possibility of its repair due to a shortage of parts. | 11th Aug 1941 | Box 132 \ 2 scan0221 | |
| Letter to R.A. Lister & Son Ltd requesting the supply of various spare parts for a plant pump. | 12th Aug 1941 | Box 132 \ 2 scan0222 | |
| Letter from Ferodo Ltd discussing the supply and testing of Ferobestos pulleys and 'V' belts. | 12th Aug 1941 | Box 132 \ 2 scan0223 | |
| Testing and feasibility of using Welsh washers in crankshafts, comparing materials. | 8th Sep 1941 | Box 132 \ 2 scan0224 | |
| Production cost savings by using softer cranks, detailing heat treatment and machining processes. | 8th Sep 1941 | Box 132 \ 2 scan0225 | |
| Outlining the additional floor area, labour, and equipment required to service 20 Allison engines per week. | 7th Dec 1940 | Box 132 \ 2 scan0226 | |
| Personnel list for Aero Work in the Derby District, categorized by job role and employee status. | 7th Dec 1940 | Box 132 \ 2 scan0227 | |
| Personnel list categorizing employees by district, role, status, and employee number. | 7th Dec 1940 | Box 132 \ 2 scan0228 | |
| Personnel list for chassis work, organised by Derby and Belper districts, roles, and employee numbers. | 11th Jan 1941 | Box 132 \ 2 scan0229 | |
| Distributing a photograph of page 14 from the Allison Operation and Maintenance Handbook. | 11th Jan 1941 | Box 132 \ 2 scan0230 | |
| Schematic diagram of the oil pressure system for Allison V-1710-C15 engines. | 20th Jan 1941 | Box 132 \ 2 scan0231 | |
| Proposal for handling the repair and assessment of the Allison engine. | 20th Jan 1941 | Box 132 \ 2 scan0232 | |
| Capacity and feasibility of undertaking Allison engine repairs. | 10th Dec 1940 | Box 132 \ 2 scan0233 | |
| Unsatisfactory macrostructure and dimensional issues with a Bentley connecting rod forging. | 8th Feb 1937 | Box 132 \ 2 scan0234 | |
| Micro-examination report concerning an unsatisfactory connecting rod forging, attributing the fault to a defect in the die. | 8th Feb 1937 | Box 132 \ 2 scan0235 | |
| Proposal for a cheaper alternative method for milling the inside panel of 25/30 HP and Bentley connecting rods. | 14th Apr 1937 | Box 132 \ 2 scan0236 | |
| Service complaint memo about the failure of connecting rods, discussing weight variations and proposing stamping weights on future parts. | 19th May 1937 | Box 132 \ 2 scan0237 | |
| Proposing an experiment to address issues with connecting rod little end bushes. | 4th Jan 1938 | Box 132 \ 2 scan0238 | |
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