| Description | Date | Identifier | |
| Comparing prices for flexible tubing from Superflexit Ltd. and Gabriel Mfg. Co. for Bentley and 25/30-HP chassis. | 6th Aug 1936 | Box 88 \ 5 scan0177 | |
| The standardisation and ordering of Superflexit tubes for Bentley and 25/30 car models. | 7th Aug 1936 | Box 88 \ 5 scan0178 | |
| Modification to the Bentley side filler cap to resolve issues with fuel pump nozzle compatibility. | 29th Aug 1936 | Box 88 \ 5 scan0179 | |
| Letter from Superflexit Ltd following up on samples of petrol pipes sent to Rolls-Royce. | 15th Sep 1936 | Box 88 \ 5 scan0180 | |
| The manufacture of a lightened Bentley petrol tank with specific modifications. | 18th Sep 1936 | Box 88 \ 5 scan0181 | |
| Letter to Superflexit Ltd. confirming an upcoming order for a quantity of tube for production use. | 21th Sep 1936 | Box 88 \ 5 scan0182 | |
| Request to calculate the cost for a Bentley Lightened Petrol Tank fitted with a Stone Guard. | 21th Sep 1936 | Box 88 \ 5 scan0183 | |
| Letter from Superflexit Ltd. concerning delivery times for Volute Drain Pipes. | 22th Sep 1936 | Box 88 \ 5 scan0184 | |
| Modifications to a Citroen Bentley petrol tank for an outside filler. | 23th Sep 1936 | Box 88 \ 5 scan0185 | |
| Letter to Messrs. Superflexit Ltd. clarifying a misunderstanding regarding previous correspondence. | 24th Sep 1936 | Box 88 \ 5 scan0186 | |
| Refusal to sign off on a modification for Superflexit petrol piping due to leakage and material deterioration in a tested sample. | 8th Oct 1936 | Box 88 \ 5 scan0187 | |
| The use and temperature limitations of superflexit on aircraft. | 9th Oct 1936 | Box 88 \ 5 scan0188 | |
| The performance and superiority of Superflexit type flexible fuel and oil pipes. | 10th Oct 1936 | Box 88 \ 5 scan0189 | |
| Performance and potential adoption of Superflexit petrol piping. | 13th Oct 1936 | Box 88 \ 5 scan0190 | |
| Quality and testing of Superflexit petrol piping. | 14th Oct 1936 | Box 88 \ 5 scan0191 | |
| Leaking 6-B-IV Superflexit Petrol Pipe on a car being worked on in Paris. | 15th Oct 1936 | Box 88 \ 5 scan0192 | |
| Investigation into a failed pipe from supplier Superflexit Ltd. | 21th Oct 1936 | Box 88 \ 5 scan0193 | |
| Letter to S. Smith & Sons Ltd. regarding loose screws on petrol gauge tank units and a request for harder jointing washers. | 21th Oct 1936 | Box 88 \ 5 scan0194 | |
| Interview with Superflexit Ltd. about a failed pipe and subsequent testing. | 21th Oct 1936 | Box 88 \ 5 scan0195 | |
| Investigation into a leaky Superflexit petrol pipe and the deterioration of its cellophane lining. | 21th Oct 1936 | Box 88 \ 5 scan0196 | |
| Cancellation of a production order due to a failure in standardisation. | 1st Aug 1929 | Box 88 \ 5 scan0197 | |
| Bench tests of 'Superflexit' flexible tubing. | 1st Aug 1929 | Box 88 \ 5 scan0198 | |
| Summary of test results on tubing, covering temperature, pressure, chemical resistance, and composition. | 1st Aug 1929 | Box 88 \ 5 scan0199 | |
| Bench tests of 'Superflexit' flexible tubing samples. | 1st Aug 1929 | Box 88 \ 5 scan0200 | |
| Vibration and pressure tests conducted on 16 m.m. and 24 m.m. tubes. | 1st Aug 1929 | Box 88 \ 5 scan0201 | |
| Hydraulic resistance, temperature, and end adaptor tests on copper and 'Superflexit' tubing. | 1st Aug 1929 | Box 88 \ 5 scan0202 | |
| The fitting, chemical properties, and specific weights of a flexible tube. | 1st Aug 1929 | Box 88 \ 5 scan0203 | |
| Specifications and installation notes for two sizes of tubes, including weights and attached documents. | 1st Jul 1929 | Box 88 \ 5 scan0204 | |
| Note on the effect of fuels and lubricating oils on the lining material of 'Superflexit' tubing. | 1st Jul 1929 | Box 88 \ 5 scan0205 | |
| Appendix detailing the results of material tests on tubing lining samples after exposure to various substances and conditions. | 1st Jul 1929 | Box 88 \ 5 scan0206 | |
| Sketch showing the arrangement of a vibrating machine for 'Titeflex' tubing tests. | 31th Jul 1929 | Box 88 \ 5 scan0207 | |
| Graph comparing the hydraulic resistances of 'Superflexit' and copper tubing at various water flow rates. | 31th Jul 1929 | Box 88 \ 5 scan0208 | |
| Graph comparing the hydraulic resistances and water velocity for Superflexit and copper tubing. | 31th Jul 1929 | Box 88 \ 5 scan0209 | |
| Test report comparing the hydraulic resistance of 'Superflexit' tubing against copper tubes. | 31th Jul 1929 | Box 88 \ 5 scan0210 | |
| Diagram illustrating the method of attaching 'Superflexit' ends, including a cross-section of the assembly and a cutting jig. | 30th Jul 1929 | Box 88 \ 5 scan0211 | |
| Note on the effect of alcohol on samples of Petroflex flexible tubing. | 1st Mar 1934 | Box 88 \ 5 scan0212 | |
| Requesting the fitting of a bracket and pipe alterations for a petrol pump on chassis 32-EX. | 22th Oct 1936 | Box 88 \ 5 scan0213 | |
| Micro-examination report on an American plain carbon steel valve spring from a 3½ Litre Bentley. | 22th Oct 1936 | Box 88 \ 5 scan0214 | |
| Laboratory photomicrograph showing a material structure at 500x magnification. | 1st Oct 1935 | Box 88 \ 5 scan0216 | |
| Laboratory photomicrograph showing a material at 150 diameters magnification. | 1st Oct 1935 | Box 88 \ 5 scan0217 | |
| Standardisation of parts report for Superflexit petrol piping. | 2nd Oct 1936 | Box 88 \ 5 scan0218 | |
| Record indicating nil cost for tools and equipment for extra jigs, which were bought out. | 25th Sep 1936 | Box 88 \ 5 scan0219 | |
| Request to alter pipes to suit the petrol pump on B-23-AE. | 20th Nov 1936 | Box 88 \ 5 scan0220 | |
| From J.B. Dixoh to HPS requesting to mount a petrol pump on a specific plate. | 23th Nov 1936 | Box 88 \ 5 scan0221 | |
| Standardisation of parts document for an outside petrol filler. | 19th Sep 1936 | Box 88 \ 5 scan0222 | |
| Estimated cost for extra jigs, tools and equipment for the 'J' series chassis production. | 20th Jun 1936 | Box 88 \ 5 scan0223 | |
| Standardisation of a lightened petrol tank and stone guard for Bentley. | 16th Nov 1936 | Box 88 \ 5 scan0224 | |
| Cost estimate for extra jigs, tools, and equipment for the 'K' series chassis production. | 21th Oct 1936 | Box 88 \ 5 scan0225 | |
| The cost details for a Bentley lightened tank and stone guard. | 1st Dec 1936 | Box 88 \ 5 scan0226 | |
| Design proposal and analysis for a tilted petrol filler for the Bentley II and other models. | 7th Dec 1936 | Box 88 \ 5 scan0227 | |
| Page from a report discussing the advantages of a tinned filler over a vertical one. | 10th Dec 1936 | Box 88 \ 5 scan0228 | |
| Fitting of double pump units to a chassis. | 10th Dec 1936 | Box 88 \ 5 scan0229 | |
| Felt samples for the Bentley stone guard. | 19th Jan 1937 | Box 88 \ 5 scan0230 | |
| Official order for a Bentley stoneguard for experimental purposes. | 22th Jan 1937 | Box 88 \ 5 scan0231 | |
| The tearing of baffle plates in a Bentley lightened petrol tank and a proposed increase in material gauge. | 27th Jan 1937 | Box 88 \ 5 scan0232 | |
| Request to manufacture a water pipe for a Bentley to accommodate an S.U. thermostatic switch. | 28th Jan 1937 | Box 88 \ 5 scan0233 | |
| New design for a steel stone-guard for a Bentley petrol tank. | 4th Feb 1937 | Box 88 \ 5 scan0234 | |
| Leaking petrol tanks on 3½ and 4¼ litre Bentley models due to rivet issues. | 2nd Feb 1937 | Box 88 \ 5 scan0235 | |
| Blueprint diagram showing the underneath view of a Bentley petrol tank with identified leak points. | 26th Feb 1937 | Box 88 \ 5 scan0236 | |
| Costs and modifications for Bentley and Wraith II petrol tank stone guards. | 26th Feb 1937 | Box 88 \ 5 scan0237 | |
| The standardisation of Bentley petrol tank stone guards due to cost savings. | 3rd Mar 1937 | Box 88 \ 5 scan0238 | |
| Dimensions and condition of engine valves before and after a test run. | 20th Feb 1937 | Box 88 \ 5 scan0239 | |
| Failures in the Bentley petrol tank, focusing on issues with rivets and soldering. | 4th Mar 1937 | Box 88 \ 5 scan0240 | |
| Request to manufacture a lightened Bentley petrol tank with modified baffle plates for testing purposes. | 11th Mar 1937 | Box 88 \ 5 scan0241 | |
| New scheme for the Bentley petrol tank support. | 13th Mar 1937 | Box 88 \ 5 scan0242 | |
| Modification to the Bentley petrol tank suspension to allow for easier removal, proposing a new scheme using Phantom III parts for standardization. | 20th Mar 1937 | Box 88 \ 5 scan0243 | |
| Instruction to fit a revised petrol tank fixing to a Bentley Bump Chassis for testing purposes. | 25th Mar 1937 | Box 88 \ 5 scan0244 | |
| Request to make a stone guard for a lightened tank, supply the necessary felt, and fix it. | 8th Apr 1937 | Box 88 \ 5 scan0245 | |
| Testing the Bentley III petrol tank and filler assembly located in the wing. | 21th Jan 1938 | Box 88 \ 5 scan0246 | |
| Trial run for one customer and the chassis allocation and delivery for the Summers family. | 21th Oct 1933 | Box 89 \ 1 scan0001 | |
| Confirmation of a 3.5-litre Bentley order and a letter regarding deliveries for the Summers family. | 26th Oct 1933 | Box 89 \ 1 scan0002 | |
| Letter to W. Watson regarding the allocation of Bentley car chassis for the Summers family. | 26th Oct 1933 | Box 89 \ 1 scan0003 | |
| Cover note forwarding a copy of a letter from Mr. Mickle of Watsons. | 31th Oct 1933 | Box 89 \ 1 scan0004 | |
| Letter from W. Watson & Co. of Liverpool regarding the negotiation and sale of Bentley cars to the Summers family. | 28th Oct 1933 | Box 89 \ 1 scan0005 | |
| Follow-up memo regarding a potential car sale to Mr. Spencer, a cousin of the Summers brothers. | 1st Nov 1933 | Box 89 \ 1 scan0006 | |
| Potential customer, Mr. Spencer, who is interested in a Bentley. | 1st Nov 1933 | Box 89 \ 1 scan0007 | |
| Letter from the Experimental Department to a customer regarding chassis availability and a trial run. | 6th Nov 1933 | Box 89 \ 1 scan0008 | |
| Difficult negotiations over the part-exchange value of a 1933 Talbot car. | 7th Nov 1933 | Box 89 \ 1 scan0009 | |
| Letter to the Experimental Department regarding car springing, speedometer accuracy, and a requested saloon car test drive. | 7th Nov 1933 | Box 89 \ 1 scan0010 | |
| Letter detailing ground clearance issues with the crank chamber and oil drain plug, and a minor accelerator pedal issue. | 7th Nov 1933 | Box 89 \ 1 scan0011 | |
| Letter to a customer regarding Bentley speedometer accuracy and an invitation to test drive a saloon car. | 20th Nov 1933 | Box 89 \ 1 scan0012 | |
| Letter to a customer discussing the difficulties and potential solutions for securing an earlier chassis delivery. | 23th Nov 1933 | Box 89 \ 1 scan0013 | |
| Page 2 of a letter discussing spare wheels, petrol fillers, a planned visit, and a photograph. | 19th Dec 1933 | Box 89 \ 1 scan0014 | |
| Letter to Richard Summers regarding the delivery of chassis B-65-AE and a potential test run. | 19th Dec 1933 | Box 89 \ 1 scan0015 | |
| Letter from a customer requesting to expedite the delivery of his Bentley chassis. | 12th Jan 1934 | Box 89 \ 1 scan0016 | |
| Forwarding a letter from Geoffrey Summers for the recipient to answer. | 15th Jan 1934 | Box 89 \ 1 scan0017 | |
| Letter to Geoffrey Summers regarding chassis deliveries, forwarding the query to Bentley Motors. | 15th Jan 1934 | Box 89 \ 1 scan0018 | |
| Typed memo regarding a customer's request to expedite a chassis delivery. | 17th Jan 1934 | Box 89 \ 1 scan0019 | |
| Letter to the first private owner of a 3½ Litre Bentley regarding brake performance after being washed. | 26th Jan 1934 | Box 89 \ 1 scan0020 | |
| Communication with a customer about car brakes after washing and his criticisms. | 30th Jan 1934 | Box 89 \ 1 scan0021 | |
| Feedback on a 3 1/2 Litre Bentley, detailing issues with the clutch, wing brackets, and springing. | 29th Jan 1934 | Box 89 \ 1 scan0022 | |
| Letter detailing initial running complaints about a new car and an insurance issue. | 30th Jan 1934 | Box 89 \ 1 scan0023 | |
| Customer's opinion of a Bentley and concerns about insurance due to its performance. | 30th Jan 1934 | Box 89 \ 1 scan0024 | |
| Replacement of a fan on a Bentley Chassis, B.65.AE, for a customer. | 7th Feb 1934 | Box 89 \ 1 scan0025 | |
| Customer complaints and findings following a visit concerning a Bentley Chassis B.65-AE. | 7th Feb 1934 | Box 89 \ 1 scan0026 | |
| Faults found with the exhaust system, springing, clutch, and carburetters. | 8th Feb 1934 | Box 89 \ 1 scan0027 | |
| Return of a fan taken off Bentley Chassis No. B.65.AE belonging to R. Summers Esq. | 8th Feb 1934 | Box 89 \ 1 scan0028 | |
| Letter from a customer to Mr. Hives concerning the specifications of a Bentley chassis. | 13th Feb 1934 | Box 89 \ 1 scan0029 | |
| Letter regarding potential modifications and a desired delivery date for a car. | 14th Mar 1932 | Box 89 \ 1 scan0030 | |
| Letter to Geoffrey Summers regarding modifications to a Bentley car, delivery dates, and an unofficial offer to modify the vehicle in Derby. | 15th Feb 1934 | Box 89 \ 1 scan0031 | |
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