| Description | Date | Identifier | |
| Weight comparison table of vehicle components between a Humber S.S. and a B.V. model. | 3rd Aug 1939 | Box 100 \ 3 scan0082 | |
| Weight comparison table for various chassis components between a Humber S.S. and a B.V. Aluminium engine model. | 3rd Aug 1939 | Box 100 \ 3 scan0083 | |
| Table comparing the weights of a complete car and its body components. | 24th Aug 1939 | Box 100 \ 3 scan0084 | |
| Weight analysis of a Bentley W.3.10 (Aluminium) engine from an EX Corniche 14.B.V. | 24th Aug 1939 | Box 100 \ 3 scan0085 | |
| Outlining a preliminary specification and weight-saving proposals for the 2.1 litre Rippletto model. | 30th Oct 1939 | Box 100 \ 3 scan0086 | |
| Weight analysis detailing the estimated weight savings on the 'Rippletto' model compared to the 'B.V.' prototype. | 30th Oct 1939 | Box 100 \ 3 scan0087 | |
| Specification for the first experimental model of the Rippletto Car. | 30th Oct 1939 | Box 100 \ 3 scan0088 | |
| Appendix sheet listing vehicle components with their design specifications and sourcing information. | 30th Oct 1939 | Box 100 \ 3 scan0089 | |
| Technical analysis comparing the frame stiffness of a 'Rippletto' frame with a Bentley V frame, including calculations and formulas. | 30th Oct 1939 | Box 100 \ 3 scan0090 | |
| Appendix sheet showing a frequency calculation and comparison for different engine and frame combinations. | 30th Oct 1939 | Box 100 \ 3 scan0091 | |
| Log sheet from 1935 detailing nominal and oval cylinder wear measurements in thousandths of an inch. | 4th Jan 1935 | Box 100 \ 3 scan0092 | |
| Tabular log of part measurements and test results with associated reference codes. | 16th Apr 1935 | Box 100 \ 3 scan0093 | |
| Tabular data log sheet recording a series of measurements and inspection results. | 16th Apr 1935 | Box 100 \ 3 scan0094 | |
| Tabular log of numerical measurements and observations. | 30th Nov 1935 | Box 100 \ 3 scan0095 | |
| Log sheet recording test measurements against various reference codes and dates. | 30th Nov 1935 | Box 100 \ 3 scan0096 | |
| Tabular data log showing numerical readings for various referenced parts recorded on different dates. | 31th Dec 1935 | Box 100 \ 3 scan0097 | |
| Report of crankshaft wear measurements for main bearing journals and big end journals. | 22th Jan 1938 | Box 100 \ 3 scan0098 | |
| The discovery of a cracked piston in a Bentley B.151.HM. | 24th Aug 1939 | Box 100 \ 3 scan0099 | |
| 1,000-hour endurance test of a high-tension neoprene cable and recommendations for future designs. | 17th Jul 1939 | Box 100 \ 3 scan0100 | |
| Main bearing fatigue due to hard driving versus a separate manufacturing defect on chassis B.84-MX. | 10th Jul 1939 | Box 100 \ 3 scan0101 | |
| Price change for oils, recommending the use of '50' i.e. De Luxe. | 23th Jun 1939 | Box 100 \ 3 scan0102 | |
| Seeking a ruling on the correct grade of Price's oil to be used, noting discrepancies in viscosity ratings and a price difference. | 9th Jun 1939 | Box 100 \ 3 scan0103 | |
| Sending of a Bentley Governor Spring. | 18th May 1939 | Box 100 \ 3 scan0104 | |
| Packing note for a small spring forwarded to Bentley Motors. | 18th May 1939 | Box 100 \ 3 scan0105 | |
| Cylinder bore wear measurements for car B.118.GA after using Arctic Oil. | 28th Apr 1939 | Box 100 \ 3 scan0106 | |
| Heat treatment tests performed on a connecting rod to investigate a growing effect. | 24th Mar 1939 | Box 100 \ 3 scan0107 | |
| Report forwarding a cracked Bentley fan hub for examination following a customer complaint. | 6th Mar 1939 | Box 100 \ 3 scan0108 | |
| Crack found on a returned Bentley Fan Hub. | 9th Mar 1939 | Box 100 \ 3 scan0109 | |
| Standardization and replacement policy for Bentley crankshafts. | 2nd Feb 1939 | Box 100 \ 3 scan0110 | |
| The fitting of new Nickel Chrome Molybdenum Alloy Bentley cylinder blocks to two cars. | 2nd Mar 1939 | Box 100 \ 3 scan0111 | |
| Measurements and condition report of big-end bearings for chassis B.125 J.Y. | 6th Feb 1939 | Box 100 \ 3 scan0112 | |
| Log of observations on Fabroil Timing Gears. | 23th Jan 1939 | Box 100 \ 3 scan0113 | |
| Requesting average bore wear figures for cars fitted with the close clearance piston EB.3151. | 23th Jan 1939 | Box 100 \ 3 scan0114 | |
| Cylinder bore wear in engines fitted with Bentley EB.3151 taper pistons and subsequent rebores. | 20th Jan 1939 | Box 100 \ 3 scan0115 | |
| Fisholow Canned Oil Socket Filler for Bentley cars, its operation, and a modification to aid gauge visibility. | 20th Dec 1938 | Box 100 \ 3 scan0116 | |
| Typed memo from GWH to By.. regarding an article on a Canned oil socket in the Autocar magazine. | 16th Dec 1938 | Box 100 \ 3 scan0117 | |
| Confirming the examination of tin-coated pistons for a 3½-litre Chassis No.B.2.CW. | 16th Dec 1938 | Box 100 \ 3 scan0118 | |
| Investigating how an uncoated piston was supplied for a 3 1/2 Litre Chassis B.2.CW. | 13th Dec 1938 | Box 100 \ 3 scan0119 | |
| Report regarding a sticking throttle on a Bentley Chassis B.199.KU caused by the use of cheap petrol or substitutes. | 14th Dec 1938 | Box 100 \ 3 scan0120 | |
| Clarifying a misunderstanding about fuel mixtures, discussing choked petrol filters, and requesting the return of a carburetter body. | 14th Dec 1938 | Box 100 \ 3 scan0121 | |
| The stock history of tinned pistons for a 3.5-litre Chassis. | 12th Dec 1938 | Box 100 \ 3 scan0122 | |
| Cause of a seized piston in a 3.5 Litre chassis, questioning if an untinned piston was supplied. | 10th Dec 1938 | Box 100 \ 3 scan0123 | |
| Requesting clarification on fuel types in relation to a Bentley throttle sticking issue. | 10th Nov 1938 | Box 100 \ 3 scan0124 | |
| Issues with the thickness of cotton duck washers used for crankshaft dampers. | 8th Dec 1938 | Box 100 \ 3 scan0125 | |
| Seized piston from a 3.5-litre engine, chassis B.2.CW, returned by Laystall Engineering. | 7th Dec 1938 | Box 100 \ 3 scan0126 | |
| Request for the man-hours required for fitting and boring a set of connecting rods. | 11th Nov 1938 | Box 100 \ 3 scan0127 | |
| Request for a list of Bentley 4¼ Litre chassis numbers that have had modifications B and C carried out. | 19th Oct 1938 | Box 100 \ 3 scan0128 | |
| Complaining about the poor quality of work from the Repair Department regarding a poorly repaired DB.225 Cutout. | 17th Oct 1938 | Box 100 \ 3 scan0129 | |
| Road test report comparing the performance of Mobiloil A and Mobiloil Arctic in a Bentley B.82.GA. | 3rd Oct 1938 | Box 100 \ 3 scan0130 | |
| Bentley owner using Mobiloil Arctic thin oil. | 3rd Oct 1938 | Box 100 \ 3 scan0131 | |
| 100-mile test comparing MOBILOIL A and MOBILOIL ARCTIC, recording oil consumption, engine characteristics, and pressures. | 22th Sep 1938 | Box 100 \ 3 scan0132 | |
| Query regarding the production progress of oil flow test rigs for Paris and Derby. | 20th Sep 1938 | Box 100 \ 3 scan0133 | |
| Selection of car owners to approach for testing thin oil after engine rebores. | 23th Sep 1938 | Box 100 \ 3 scan0134 | |
| Arrangement of tests for thin oils, specifically 'Arctic oil', on Bentley cars. | 21th Sep 1938 | Box 100 \ 3 scan0135 | |
| Fault where the engine oil filler cap stud unscrews on Bentley and Wraith models. | 29th Aug 1938 | Box 100 \ 3 scan0136 | |
| And rejecting a suggestion to add a gauze to the engine's oil filler cap. | 31th Aug 1938 | Box 100 \ 3 scan0137 | |
| Modifications to white metal bearings and oil pump for a 3 1/2 litre engine. | 7th Jul 1937 | Box 100 \ 3 scan0138 | |
| Service record detailing recurring bearing failures and associated repair costs for a 3 1/2 litre car. | 17th Dec 1937 | Box 100 \ 3 scan0139 | |
| Trial of thin oil (Arctic) in Bentley cars used primarily for town running. | 16th Sep 1938 | Box 100 \ 3 scan0140 | |
| Examination of returned pistons suffering from 'scuffing' and a proposal for using tin plating to prevent future seizures. | 20th Jul 1938 | Box 100 \ 3 scan0141 | |
| Engine failure in a Bentley B.118.GK, detailing a fractured No.2 piston. | 15th Aug 1938 | Box 100 \ 3 scan0142 | |
| Growing issue with Bentley KLG.FLB30X plugs burning thin, causing misfires. | 14th Jun 1938 | Box 100 \ 3 scan0143 | |
| Notification regarding the receipt and forwarding of a new set of KLG.FLB.50.X. plugs. | 15th Jun 1938 | Box 100 \ 3 scan0144 | |
| Following up on bad starting issues with a 4¼-litre car owned by a Mr. Nicholls. | 21th Jan 1938 | Box 100 \ 3 scan0145 | |
| Extract of a letter from S. Smith & Sons regarding anti-freeze recommendations for a 1938 Bentley. | 7th Dec 1937 | Box 100 \ 3 scan0146 | |
| Complaint of engine detonations in a 4 1/4 litre Bentley, suspected to be caused by a faulty governor. | 30th Sep 1936 | Box 100 \ 3 scan0147 | |
| Broken valve spring from a Bentley B-114-HK, suspected to be caused by a material flaw. | 4th Dec 1936 | Box 100 \ 3 scan0148 | |
| Micro-examination report on a broken valve spring from a Bentley B-114-HK. | 30th Dec 1936 | Box 100 \ 3 scan0149 | |
| Examination of an inlet valve from a Bentley B-230-GA, noting deposits from Ethyl fuel. | 14th Mar 1938 | Box 100 \ 3 scan0150 | |
| Clarifying a misunderstanding about a reported rocker arm failure on a 4¼-litre engine. | 10th Jan 1938 | Box 100 \ 3 scan0151 | |
| The failure of a rocker arm on Chassis No. B.58.GA. | 8th Jan 1938 | Box 100 \ 3 scan0152 | |
| Broken Phantom III Bentley rocker shaft and a similar failure on another vehicle. | 4th May 1937 | Box 100 \ 3 scan0153 | |
| Technical note on the opinion against using aluminium washers for joints under plugs and banjos. | 2nd Jun 1937 | Box 100 \ 3 scan0154 | |
| List of Bentley chassis fitted with valve springs made from Swedish heat-treated carbon steel wire. | 4th Jan 1938 | Box 100 \ 3 scan0155 | |
| Testing of Bentley valves for failures and cracks. | 6th May 1937 | Box 100 \ 3 scan0156 | |
| To Mr. Lang regarding chassis B-122-GA, detailing new parts fitted and an ongoing oil consumption test. | 2nd Jul 1937 | Box 100 \ 3 scan0157 | |
| Close-up photograph of a flywheel assembly, noting mileage. | 31th Oct 1938 | Box 100 \ 3 scan0158 | |
| Highlighting a safety concern with a Bentley Bonnet Fastener due to sharp corners on the stamping. | 31th Oct 1938 | Box 100 \ 3 scan0159 | |
| Machining error found on Bentley connecting rod bearings. | 14th May 1938 | Box 100 \ 3 scan0160 | |
| Bentley B.74-HK with engine trouble, finding a broken connecting rod and a cracked crankcase. | 6th Oct 1937 | Box 100 \ 3 scan0161 | |
| Fitting instructions for Bentley main bearings and a change-over to white metal. | 5th Jan 1938 | Box 100 \ 3 scan0162 | |
| Responding to service complaints about rod weight tolerances and proposing a stamping procedure. | 10th Jun 1937 | Box 100 \ 3 scan0163 | |
| Bearing seizure issues on chassis B-117-JY. | 10th Sep 1937 | Box 100 \ 3 scan0164 | |
| The dispatch of Bentley connecting rod bearing shells for re-conditioning at Kingsbury. | 23th Sep 1937 | Box 100 \ 3 scan0165 | |
| Outlining the procedure and quality standards for repairing connecting rods at the Kingsbury Depot. | 18th Sep 1937 | Box 100 \ 3 scan0166 | |
| No.2 connecting rod failure in a 4¼ Litre Bentley, chassis B.14.HK. | 23th Jun 1937 | Box 100 \ 3 scan0167 | |
| Bearing failures on chassis B.117.JY and the Chief Engineer's recommendation for a full engine examination. | 16th Sep 1937 | Box 100 \ 3 scan0168 | |
| Service complaint memo regarding the failure and replacement policy of connecting rods for P.III, 25/30 & Bentley models. | 19th May 1937 | Box 100 \ 3 scan0169 | |
| Responding to an owner's complaint report regarding engine knock, bearing clearance, and shims. | 16th Oct 1937 | Box 100 \ 3 scan0170 | |
| Bentley B.244.GA with excessive oil consumption, including test results and analysis of potential causes. | 7th Jul 1937 | Box 100 \ 3 scan0171 | |
| Analysis of piston ring performance and oil consumption, with references to Michelin and Bugatti designs. | 7th Jul 1937 | Box 100 \ 3 scan0172 | |
| Engine modification 'C' for a 3.5-litre car, detailing the changes and road test results. | 5th Jul 1937 | Box 100 \ 3 scan0173 | |
| 100-mile high-speed test of a Bentley, chassis B-122-GA, with special engine components. | 5th Jul 1937 | Box 100 \ 3 scan0174 | |
| Typed report on poor oil consumption tests for Chassis 260 GA. | 29th Jun 1937 | Box 100 \ 3 scan0175 | |
| Oil consumption test on chassis B.260.GA for Mr. Embiricos after fitting new scraper rings. | 12th Jul 1937 | Box 100 \ 3 scan0176 | |
| Overoiling complaint and high-speed oil consumption tests for a Bentley B.122.GA. | 6th Jul 1937 | Box 100 \ 3 scan0177 | |
| Excessive oil consumption in Bentley cars, potential solutions, and issues with owner oil-level checks. | 11th Jun 1937 | Box 100 \ 3 scan0178 | |
| The poor condition of con-rod and main bearings from Mr. A. Embiricos's Bentley 260.GA. | 11th Jun 1937 | Box 100 \ 3 scan0179 | |
| Service troubles with Bentley 3½ and 4¼ litre engines. | 2nd Jun 1937 | Box 100 \ 3 scan0180 | |
| Inquiry about work carried out on chassis B.260.GA regarding excessive oil consumption and engine modifications. | 16th Jun 1937 | Box 100 \ 3 scan0181 | |
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