| Description | Date | Identifier | |
| Letter to The Light Production Co. Ltd. regarding an offer for three sets of special pistons, assigning them the code number EX.1. | 27th Jan 1936 | Box 87 \ 2 scan0124 | |
| Requesting an order to be placed with Light Production Co. Ltd. for six modified Bentley pistons. | 31th Jan 1936 | Box 87 \ 2 scan0125 | |
| Request to place an official order with the Light Production Co. Ltd. for various sets of piston rings. | 31th Jan 1936 | Box 87 \ 2 scan0126 | |
| Requesting an official order for various sets of piston rings from Light Production Co. Ltd. | 31th Jan 1936 | Box 87 \ 2 scan0127 | |
| Requesting an official order for various sets of piston rings for different bore sizes. | 31th Jan 1936 | Box 87 \ 2 scan0128 | |
| Letter to a supplier requesting specific sets of piston rings and giving feedback on a piston endurance test. | 31th Jan 1936 | Box 87 \ 2 scan0129 | |
| Letter requesting details about an anodical piston treatment process from 1934, possibly called 'Alumiliting'. | 31th Jan 1936 | Box 87 \ 2 scan0130 | |
| Comparison of power output between Aerolite and EB.1299 pistons for Bentley engines. | 10th Feb 1936 | Box 87 \ 2 scan0131 | |
| Oil consumption tests comparing different piston types and chassis configurations. | 10th Feb 1936 | Box 87 \ 2 scan0132 | |
| Valve clearance issues, oil consumption complaints, and piston performance testing. | 10th Feb 1936 | Box 87 \ 2 scan0133 | |
| The endurance testing of Aerolite pistons for 3½ and 4¼ litre Bentley engines. | 10th Feb 1936 | Box 87 \ 2 scan0134 | |
| Issues with piston rings being too close a fit in the grooves for 25/30 HP & 4 1/4 litre Bentley Pistons E.60632. | 18th Feb 1936 | Box 87 \ 2 scan0135 | |
| Complaints of excessive oil consumption in Bentley vehicles, potentially linked to the fitting of Aerolite pistons. | 22th Feb 1936 | Box 87 \ 2 scan0136 | |
| Letter discussing the commercial viability and pricing of Aerolite pistons for Bentley cars. | 25th Feb 1936 | Box 87 \ 2 scan0137 | |
| Letter discussing the urgency of addressing criticism of the Aerolite piston with the Managing Director. | 25th Feb 1936 | Box 87 \ 2 scan0138 | |
| Letter to C.H. Brooks of The Light Production Co. Ltd. to arrange a meeting. | 28th Feb 1936 | Box 87 \ 2 scan0139 | |
| Reasons for standardizing Aerolite pistons on Bentley vehicles. | 28th Feb 1936 | Box 87 \ 2 scan0140 | |
| Comparison of standard and Aerolite pistons regarding oil consumption, power output, weight, and criticisms. | 28th Feb 1936 | Box 87 \ 2 scan0141 | |
| The cost and production challenges of the Aerolite Piston. | 28th Feb 1936 | Box 87 \ 2 scan0142 | |
| The introduction of Stromberg carburetters and Borg & Beck clutches. | 28th Feb 1936 | Box 87 \ 2 scan0143 | |
| Test results table for Bentley cars comparing Standard pistons and Aerolite pistons over various mileages. | 10th Oct 1935 | Box 87 \ 2 scan0144 | |
| Cost analysis of substituting Aerolite Pistons for R.R. manufactured pistons on the 25/30HP Chassis. | 5th Mar 1936 | Box 87 \ 2 scan0145 | |
| Questioning the price increase of Aerolite pistons for large bore Bentley cars. | 5th Mar 1936 | Box 87 \ 2 scan0146 | |
| List of chassis numbers with details of work carried out on their pistons and rocker shafts. | 11th Mar 1936 | Box 87 \ 2 scan0147 | |
| Letter from The Light Production Co. Ltd. to W. A. Robotham concerning negotiations on the 3½' Bentley Aerolite. | 11th Mar 1936 | Box 87 \ 2 scan0148 | |
| Letter discussing the price difference for Aerolite Pistons due to foundry scrap issues and manufacturing improvements. | 11th Mar 1936 | Box 87 \ 2 scan0149 | |
| Letter from The Light Production Co. Ltd. regarding a price reduction and delivery of pistons. | 16th Mar 1936 | Box 87 \ 2 scan0150 | |
| Notification of a price reduction for Bentley Aerolite Pistons from The Light Production Co. | 16th Mar 1936 | Box 87 \ 2 scan0151 | |
| Letter to The Light Production Co. Ltd. requesting special piston rings to address an oil consumption issue. | 19th Mar 1936 | Box 87 \ 2 scan0152 | |
| Race strategy and car modifications for the Le Mans race. | 21th Mar 1936 | Box 87 \ 2 scan0153 | |
| Faroux's strategy for winning the Le Mans race, emphasizing reliability and continuous driving over outright speed. | 21th Mar 1936 | Box 87 \ 2 scan0154 | |
| Letter confirming a 1/4 scale drawing of a new car body has been sent, showing the position for a straight petrol tank filler. | 23th Mar 1936 | Box 87 \ 2 scan0155 | |
| Issue with 'petrol swabbing over' and the redesign of baffles to cope with the problem. | 23th Mar 1936 | Box 87 \ 2 scan0156 | |
| Fuel tank filling methods, comparing churns to the Le Mans overhead system. | 23th Mar 1936 | Box 87 \ 2 scan0157 | |
| Headlamps, a front cowl, and other parts. | 23th Mar 1936 | Box 87 \ 2 scan0158 | |
| Letter regarding hotel accommodation for the Le Mans 24 hour race. | 23th Mar 1936 | Box 87 \ 2 scan0159 | |
| Advice note from The Light Production Co. Ltd. for the dispatch of 15 slotted scraper rings. | 25th Mar 1936 | Box 87 \ 2 scan0160 | |
| Letter from Offord & Sons Ltd. enclosing a quarter scale drawing showing the position of the petrol tank filler for a Bentley chassis. | 25th Mar 1936 | Box 87 \ 2 scan0161 | |
| Letter to E.R. Hall discussing modifications to a Bentley body for racing, including filler cap placement and automatic oil feed systems. | 26th Mar 1936 | Box 87 \ 2 scan0162 | |
| Page 2 of a typed letter discussing car modifications including a filler cap and headlamps for a 24-hour race. | 26th Mar 1936 | Box 87 \ 2 scan0163 | |
| Letter to C.H. Brooks of The Light Production Co. Ltd. regarding the performance and testing of piston rings. | 27th Mar 1936 | Box 87 \ 2 scan0164 | |
| Table of daily oil consumption figures for a Bentley (B-56-BN) and a 25 HP (22-G-V) model. | 27th Mar 1936 | Box 87 \ 2 scan0165 | |
| Preparations for the Le Mans Race, including using a Phantom III for course policing and accommodation arrangements. | 27th Mar 1936 | Box 87 \ 2 scan0166 | |
| Short communication regarding the unavailability of headlamp brackets. | 28th Mar 1936 | Box 87 \ 2 scan0167 | |
| Letter to The Light Production Co. Ltd. requesting high unit pressure turned surface rings for trial on a Bentley. | 4th Apr 1936 | Box 87 \ 2 scan0168 | |
| Request to place an official order for two different types of piston sets from Light Production Co. Ltd. | 7th Apr 1936 | Box 87 \ 2 scan0169 | |
| Letter to The Light Production Co. Ltd. about returning a set of cracked pistons that failed during a high-compression engine test. | 7th Apr 1936 | Box 87 \ 2 scan0170 | |
| Request for six sets of pistons with modified specifications including dimensions, weight, and heat break sawcuts. | 7th Apr 1936 | Box 87 \ 2 scan0171 | |
| Correcting piston dimensions for an order placed with Light Production Co. Ltd. | 18th Apr 1936 | Box 87 \ 2 scan0172 | |
| Request to issue a covering order for an invoice from The Light Production Co. Ltd. for slotted scraper rings. | 23th Apr 1936 | Box 87 \ 2 scan0173 | |
| Confirming the receipt of scraper rings for a 4 1/4 litre Bentley chassis. | 24th Apr 1936 | Box 87 \ 2 scan0174 | |
| Request to place an official order for 72 Slotted Scraper Rings. | 25th Apr 1936 | Box 87 \ 2 scan0175 | |
| Requesting the preparation of Bentley pistons to be sent for grinding. | 27th Apr 1936 | Box 87 \ 2 scan0176 | |
| Requesting an official order for 36 Scraper Rings from Light Production Co. Ltd. | 28th Apr 1936 | Box 87 \ 2 scan0177 | |
| Letter to a supplier requesting scraper rings and discussing ongoing tests on other piston and ring designs for Bentley engines. | 28th Apr 1936 | Box 87 \ 2 scan0178 | |
| Letter concerning piston design and an official order for rings. | 28th Apr 1936 | Box 87 \ 2 scan0179 | |
| Letter to The Light Production Ltd. requesting the supply of various piston rings. | 4th May 1936 | Box 87 \ 2 scan0180 | |
| To Roy requesting an official order for 48 Piston Rings for the Light Production Co. Ltd. | 5th May 1936 | Box 87 \ 2 scan0181 | |
| Letter to Mr. Brooks of The Light Production Co. Ltd. to arrange a meeting about piston rings. | 25th May 1936 | Box 87 \ 2 scan0182 | |
| Recommending the trial and potential standardization of turned Bentley Scraper Rings to address high oil consumption. | 26th May 1936 | Box 87 \ 2 scan0183 | |
| Experiments on Bentley scraper rings to improve engine oil consumption. | 25th May 1936 | Box 87 \ 2 scan0184 | |
| Supplier of piston scraper rings for the Bentley chassis and arranging an order. | 4th Jun 1936 | Box 87 \ 2 scan0185 | |
| The procurement and performance issues of piston scraper rings for the Bentley chassis. | 6th Jun 1936 | Box 87 \ 2 scan0186 | |
| Dispatching pistons to the Light Production Co. for grinding and requesting an official order be passed. | 9th Jun 1936 | Box 87 \ 2 scan0187 | |
| Letter to The Light Production Co. Ltd. despatching pistons for grinding to a No.10 cam. | 9th Jun 1936 | Box 87 \ 2 scan0188 | |
| Letter to The Light Production Co. Ltd. requesting the supply of 14 modified 4.5 litre Bentley pistons. | 10th Jun 1936 | Box 87 \ 2 scan0189 | |
| Instructing Roy to place an official order for 14 pistons with the Light Production Co. Ltd. | 10th Jun 1936 | Box 87 \ 2 scan0190 | |
| Letter from The Light Production Co. Ltd. regarding a discrepancy in an engineering drawing for a special Aerolite piston. | 16th Jun 1936 | Box 87 \ 2 scan0191 | |
| The closing page of a letter from the General Manager of The Light Production Co. Ltd. | 17th Jun 1936 | Box 87 \ 2 scan0192 | |
| Letter to a supplier regarding a drawing correction for an angle and faulty scraper rings causing high oil consumption. | 17th Jun 1936 | Box 87 \ 2 scan0193 | |
| Despatch of Piston Scraper Rings to the makers for examination due to high oil consumption. | 17th Jun 1936 | Box 87 \ 2 scan0194 | |
| Letter from The Light Production Co. Ltd. discussing the flatness and manufacturing process of scraper rings. | 22th Jun 1936 | Box 87 \ 2 scan0195 | |
| Letter from The Light Production Company Ltd. regarding high oil consumption. | 22th Jun 1936 | Box 87 \ 2 scan0196 | |
| Letter to The Light Production Co. Ltd. requesting 72 modified scraper rings for oil consumption tests. | 23th Jun 1936 | Box 87 \ 2 scan0197 | |
| Comparison of piston ring details and oil consumption between Chevrolet and Bentley engines. | 23th Jun 1936 | Box 87 \ 2 scan0198 | |
| Specification sheet detailing the properties of compression rings and Chevrolet scraper rings. | 23th Jun 1936 | Box 87 \ 2 scan0199 | |
| Page detailing specifications for 'Stepped type' and 'Plain' compression rings, with a note comparing them to Chevrolet rings. | 23th Jun 1936 | Box 87 \ 2 scan0200 | |
| Technical analysis and comparison of piston rings, including material properties, manufacturing methods, and oil consumption tests. | 23th Jun 1936 | Box 87 \ 2 scan0201 | |
| Comparison of various lubricating oils' consumption and viscosity, with analysis of the results. | 23th Jun 1936 | Box 87 \ 2 scan0202 | |
| Specifications and analysis requirements for Chevrolet piston rings. | 24th Jun 1936 | Box 87 \ 2 scan0203 | |
| Letter from The Light Production Co. Ltd. updating on the production status of various piston sets. | 24th Jun 1936 | Box 87 \ 2 scan0204 | |
| Letter to W.A. Robotham regarding delivery updates for Aerolite pistons and R.R. Castings. | 24th Jun 1936 | Box 87 \ 2 scan0205 | |
| Letter from The Light Production Co. Ltd. regarding the supply of Type 'B' piston rings. | 24th Jun 1936 | Box 87 \ 2 scan0206 | |
| Letter to The Light Production Co. Ltd. requesting a supply of compression rings for oil consumption tests. | 3rd Jul 1936 | Box 87 \ 2 scan0207 | |
| Requesting an official order be passed to the Light Production Co. for Compression Rings. | 3rd Jul 1936 | Box 87 \ 2 scan0208 | |
| Telegraphic request for the urgent supply of a set of D Type rings. | 9th Jul 1936 | Box 87 \ 2 scan0209 | |
| Letter from The Light Production Co. Ltd. confirming the despatch of a set of rings. | 9th Jul 1936 | Box 87 \ 2 scan0210 | |
| Request to pass an official order for two sets of P.R.657 'D' type turned rings to the Light Production Co. Ltd. | 11th Jul 1936 | Box 87 \ 2 scan0211 | |
| Letter to The Light Production Co. Ltd. regarding a cracked ring and a request for a replacement. | 11th Jul 1936 | Box 87 \ 2 scan0212 | |
| Urgent telegram requesting 48 turned compression rings with a 3 1/2' diameter. | 11th Jul 1936 | Box 87 \ 2 scan0213 | |
| Requesting an official order be passed to the Light Production Co. for compression and scraper rings. | 11th Jul 1936 | Box 87 \ 2 scan0214 | |
| Letter to The Light Production Co. Ltd. placing an order for various types of rings. | 11th Jul 1936 | Box 87 \ 2 scan0215 | |
| Telegram requesting the earliest delivery date for turned compression rings with scarf and butt joints. | 16th Jul 1936 | Box 87 \ 2 scan0216 | |
| Letter to The Light Production Co. Ltd. confirming a telegram and urgently requesting the delivery of turned compression rings. | 17th Jul 1936 | Box 87 \ 2 scan0217 | |
| Letter to The Light Production Co. Ltd. concerning piston ring sideways clearance. | 28th Jul 1936 | Box 87 \ 2 scan0218 | |
| Letter to The Light Production Co. Ltd. ordering 50 plain piston rings. | 4th Aug 1936 | Box 87 \ 2 scan0219 | |
| Official order for 50 piston rings from Light Production Co. Ltd. | 4th Aug 1936 | Box 87 \ 2 scan0220 | |
| Requesting an official order for rings for a 25/30 chassis and Bentley spares. | 13th Aug 1936 | Box 87 \ 2 scan0221 | |
| Letter to a supplier requesting the supply of rings and correcting specifications on the associated drawings. | 13th Aug 1936 | Box 87 \ 2 scan0222 | |
| Specifications and ordering requirements for various types of piston rings, including scraper and compression rings. | 13th May 1936 | Box 87 \ 2 scan0223 | |
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