| Description | Date | Identifier | |
| Letter from The S.U. Carburetter Co. Ltd. regarding dies for stampings and pump despatches. | 9th Oct 1936 | Box 149 \ 4 scan0026 | |
| Letter from The S.U. Carburetter Co. Ltd regarding a misplaced blueprint for a high pressure pump on the Phantom Rolls. | 9th Oct 1936 | Box 149 \ 4 scan0027 | |
| Internal order request for six High Lift Petrol Pumps and air bottles for the Phantom III. | 9th Oct 1936 | Box 149 \ 4 scan0028 | |
| Internal memorandum requesting a reminder regarding S.U. Petrol Pumps, with a handwritten response. | 9th Oct 1936 | Box 149 \ 4 scan0029 | |
| Correspondence with The S.U. Company Ltd. regarding prints for air bottles and magnet pots. | 10th Oct 1936 | Box 149 \ 4 scan0030 | |
| Requesting the booking in of 24 G.3 Diaphragms from the S.U. Company for experimental purposes. | 12th Oct 1936 | Box 149 \ 4 scan0031 | |
| Letter from S.U. Carburetter Co. Ltd discussing a blueprint for a mild steel pot and chasing an order for 6 high pressure pumps. | 12th Oct 1936 | Box 149 \ 4 scan0032 | |
| The return of a petrol pump from a Phantom III, 3-AZ-28, to the S.U. Company for repair. | 12th Oct 1936 | Box 149 \ 4 scan0033 | |
| Request to order four petrol pumps with silencing washers from the S.U. Company for Bentley and 25/30 HP cars. | 12th Oct 1936 | Box 149 \ 4 scan0034 | |
| Letter from The S.U. Carburetter Co. Ltd analysing faults found in returned pumps. | 12th Oct 1936 | Box 149 \ 4 scan0035 | |
| Letter from S.U. Carburetter Company regarding diaphragm shrinkage and noise issues in pumps used on the Phantom III model. | 23th May 1935 | Box 149 \ 4 scan0036 | |
| Brief internal note questioning the testing procedure for petrol pumps. | 13th Oct 1936 | Box 149 \ 4 scan0037 | |
| Amusing incident with a newly delivered petrol pump which had extra valves forgotten inside. | 10th Oct 1936 | Box 149 \ 4 scan0038 | |
| Chasing an official order for 6 High Lift Petrol Pumps from the S.U. Company. | 13th Oct 1936 | Box 149 \ 4 scan0039 | |
| Request to manufacture four Magnet Pots according to a drawing supplied by the S.U. Company. | 14th Oct 1936 | Box 149 \ 4 scan0040 | |
| Letter to S.U. Company Ltd. regarding the delivery of high lift pumps and magnet pots, and issues with valve modifications. | 14th Oct 1936 | Box 149 \ 4 scan0041 | |
| Query regarding the fitting of condensers to pumps on cars equipped with wireless radios. | 14th Oct 1936 | Box 149 \ 4 scan0042 | |
| Letter from The S.U. Carburetter Co. Ltd proposing a new design for a pump spindle and armature. | 14th Oct 1936 | Box 149 \ 4 scan0043 | |
| Blueprint for an armature for a high-pressure pump. | 7th Jul 1936 | Box 149 \ 4 scan0044 | |
| Blueprint for a Centre Sliding Rod for a High Pressure Pump. | 31th Jul 1936 | Box 149 \ 4 scan0045 | |
| Diaphragm plate for a high-pressure pump. | 14th Oct 1936 | Box 149 \ 4 scan0046 | |
| Letter from S.U. Carburetter Co. Ltd regarding delivery valves and fitting a condenser to a pump to eliminate wireless interference. | 15th Oct 1936 | Box 149 \ 4 scan0047 | |
| Request for the return of a petrol pump from chassis GUL-58 for examination. | 15th Oct 1936 | Box 149 \ 4 scan0048 | |
| Letter to The S.U. Company Ltd. regarding a proposed modification to an armature spindle and the analysis of returned pumps. | 15th Oct 1936 | Box 149 \ 4 scan0049 | |
| Letter from The S.U. Carburetter Co. Ltd regarding the design of an armature and spindle, with a handwritten note on pump pressures. | 16th Oct 1936 | Box 149 \ 4 scan0050 | |
| New process for analyzing petrol pump failures by labelling returned units. | 16th Oct 1936 | Box 149 \ 4 scan0051 | |
| Letter to the S.U. Company regarding the supply and testing of different diaphragm materials for petrol pumps. | 19th Oct 1936 | Box 149 \ 4 scan0052 | |
| Follow-up letter inquiring about the delivery status of high lift pumps. | 19th Oct 1936 | Box 149 \ 4 scan0053 | |
| Instruction for arranging petrol pump repairs and inspections with the S.U. Company. | 19th Oct 1936 | Box 149 \ 4 scan0054 | |
| Request to return pump units from Professor Dodds' car (B.34.GA) to the Experimental Dept. for diaphragm examination. | 19th Oct 1936 | Box 149 \ 4 scan0055 | |
| Letter from S. Smith & Sons regarding samples of harder jointing material for petrol gauge washers. | 22th Oct 1936 | Box 149 \ 4 scan0056 | |
| Letter from S.U. Carburetter Co. Ltd. regarding sending Bentley and Rolls pumps for testing and design alterations. | 27th Oct 1936 | Box 149 \ 4 scan0057 | |
| Failures in S.U. petrol pumps, specifically relating to diaphragm issues causing noise and delivery failure. | 27th Oct 1936 | Box 149 \ 4 scan0058 | |
| Pump noise issues and diaphragm material for 25/30 and Phantom III models. | 28th Oct 1936 | Box 149 \ 4 scan0059 | |
| Requesting 30 petrol pumps be immediately sent to the S.U. Company. | 28th Oct 1936 | Box 149 \ 4 scan0060 | |
| Letter from S.U. Carburetter Co. Ltd discussing the reliability and potential service troubles of the G.3 diaphragm. | 29th Oct 1936 | Box 149 \ 4 scan0061 | |
| Petrol supply failures in S.U. pumps, focusing on diaphragm trouble and noise. | 27th Oct 1936 | Box 149 \ 4 scan0062 | |
| Issues with diaphragm trouble, noise, pump placement, and the effects of diesel and alcohol fuels. | 27th Oct 1936 | Box 149 \ 4 scan0063 | |
| Comparison of the reliability of Autovac, S.U., and A.C. mechanical and electrical fuel pumps. | 27th Oct 1936 | Box 149 \ 4 scan0064 | |
| Analysis of failures for S.U. pumps submitted by the S.U. Company. | 27th Oct 1936 | Box 149 \ 4 scan0065 | |
| Line graph charting the quarterly complaints regarding S.U. petrol pumps on Bentley vehicles. | 30th Sep 1936 | Box 149 \ 4 scan0066 | |
| Requesting to attach a Complaints Analysis sheet to another referenced document. | 28th Oct 1936 | Box 149 \ 4 scan0067 | |
| Order for 24 high lift pumps for the Phantom III. | 28th Oct 1936 | Box 149 \ 4 scan0068 | |
| Requesting a bracket be fitted to the frame of 38-EX to carry a petrol pump. | 28th Oct 1936 | Box 149 \ 4 scan0069 | |
| Forwarding a copy of a letter written to Mr. Skinner of the S.U. Company. | 28th Oct 1936 | Box 149 \ 4 scan0070 | |
| Letter to the S.U. Carburetter Co. confirming arrangements for replacing G.J. zinc base pump diaphragms. | 28th Oct 1936 | Box 149 \ 4 scan0071 | |
| Letter discussing the testing and standardisation of silenced pumps and a diaphragm changeover. | 29th Oct 1936 | Box 149 \ 4 scan0072 | |
| Changeover, dispatch, and testing of S.U. pumps and diaphragms for various car models. | 29th Oct 1936 | Box 149 \ 4 scan0073 | |
| Confirmation of sending a 25/30 HP S.U. Petrol Pump by Air Mail to Mr. Hamilton in France. | 30th Oct 1936 | Box 149 \ 4 scan0074 | |
| Return of a High Lift petrol pump to the S.U. Company for repair. | 30th Oct 1936 | Box 149 \ 4 scan0075 | |
| Bentley petrol pump and a 25/30 HP pump for a trials car. | 30th Jun 1936 | Box 149 \ 4 scan0076 | |
| Order of a Bentley and a 25/30 HP petrol pump from the S.U. Co. | 30th Oct 1936 | Box 149 \ 4 scan0077 | |
| The stamping identification for modified petrol pumps. | 30th Oct 1936 | Box 149 \ 4 scan0078 | |
| The return of diaphragms and various pumps to the works for Mr. Funt of Franco Brittanic Autos. | 30th Oct 1936 | Box 149 \ 4 scan0079 | |
| Letter to Benjamin Whittaker, Ltd. inquiring about the supply of a 'Mechanics' propeller shaft with specific performance requirements. | 30th Oct 1936 | Box 149 \ 4 scan0080 | |
| Letter from The S.U. Carburetter Co. Ltd detailing test results for a new G.5 diaphragm material. | 30th Oct 1936 | Box 149 \ 4 scan0081 | |
| Sending a Bentley petrol pump to Franco Brittanic Autos Ltd in Lyons. | 31th Oct 1936 | Box 149 \ 4 scan0082 | |
| Examination of a faulty petrol pump following a complaint from John Croall & Son, Edinburgh. | 2nd Nov 1936 | Box 149 \ 4 scan0083 | |
| Petrol pump failure on a Phantom III and an urgent request for a replacement part. | 2nd Nov 1936 | Box 149 \ 4 scan0084 | |
| Suggestion to fit two parallel petrol pumps on the Phantom III to resolve ongoing failures. | 2nd Nov 1936 | Box 149 \ 4 scan0085 | |
| Failure of a high lift pump on vehicle 35-EX. | 3rd Nov 1936 | Box 149 \ 4 scan0086 | |
| Telex message arranging the collection of modified Bentley type pumps. | 3rd Nov 1936 | Box 149 \ 4 scan0087 | |
| Letter to the S.U. Company Ltd. regarding the supply and modification of high lift pumps. | 3rd Nov 1936 | Box 149 \ 4 scan0088 | |
| Development and production of petrol pumps for the 35-EX and Phantom III models. | 3rd Nov 1936 | Box 149 \ 4 scan0089 | |
| Design and operational issues of petrol pumps. | 3rd Nov 1936 | Box 149 \ 4 scan0090 | |
| Benefits and implementation of a dual single pump system over a double pump, particularly concerning the Phantom III model. | 4th Nov 1936 | Box 149 \ 4 scan0091 | |
| Letter to S.U. Company Ltd. regarding the failure of a Bentley lightened pump after a 73-hour test. | 4th Nov 1936 | Box 149 \ 4 scan0092 | |
| Letter from The Society of Motor Manufacturers and Traders regarding alleged failures of petrol supply systems. | 4th Nov 1936 | Box 149 \ 4 scan0093 | |
| Letter from The Automobile Association regarding complaints of fuel stoppages due to vapour lock. | 26th Oct 1936 | Box 149 \ 4 scan0094 | |
| More accessible, alternative position for the petrol pump on the Phantom III model. | 4th Nov 1936 | Box 149 \ 4 scan0095 | |
| Arranging a visit for Colonel Roberts and Mr Ward of Park Ward's to Derby. | 4th Nov 1936 | Box 149 \ 4 scan0096 | |
| Petrol pump schemes and mounting for the Phantom III and 25/30 models. | 5th Nov 1936 | Box 149 \ 4 scan0097 | |
| Petrol pump schemes, including single, dual, or triple pump configurations and mounting on various car models. | 4th Nov 1936 | Box 149 \ 4 scan0098 | |
| Scheme to simplify the changing over of petrol pumps on Bentley chassis. | 5th Nov 1936 | Box 149 \ 4 scan0099 | |
| Order be placed with the S.U. Carburetter Co. Ltd. for a Bentley dual petrol pump. | 9th Nov 1936 | Box 149 \ 4 scan0100 | |
| Confirming payment for a Bentley Dual Petrol pump. | 9th Nov 1936 | Box 149 \ 4 scan0101 | |
| Modifications to the petrol filter on the second crossmember for cost-saving purposes. | 9th Nov 1936 | Box 149 \ 4 scan0102 | |
| Blueprint showing a suggested modification to a petrol filter for the Phantom III, 25/30HP & Wraith models. | 3rd Nov 1936 | Box 149 \ 4 scan0103 | |
| Order for one Bentley Dual Pressure Pump from the S.U. Carburetter Co. Ltd. | 9th Nov 1936 | Box 149 \ 4 scan0104 | |
| Request to have pipes fitted to a petrol pump rig according to an attached sketch. | 10th Nov 1936 | Box 149 \ 4 scan0105 | |
| Follow-up letter to Superflexit Ltd. regarding the failure of a flexible petrol pipe and promised samples. | 11th Nov 1936 | Box 149 \ 4 scan0106 | |
| Letter from a supplier regarding flexible petrol pipes, following up on a visit and previous correspondence. | 13th Nov 1936 | Box 149 \ 4 scan0107 | |
| Letter from the Experimental Department requesting the supply of needles with specified dimensions from The S.U. Company. | 14th Nov 1936 | Box 149 \ 4 scan0108 | |
| Improvements and tests for the S.U. petrol pump on the Phantom III model. | 18th Nov 1936 | Box 149 \ 4 scan0109 | |
| Comparison of G.1 and G.3 material diaphragms, tested with and without air bottles on a pump. | 18th Nov 1936 | Box 149 \ 4 scan0110 | |
| Analysis of petrol flow restriction and pump delivery in relation to temperature for the Phantom III fuel system. | 18th Nov 1936 | Box 149 \ 4 scan0111 | |
| Performance graph for the Phantom III S.U. pump with a 30-inch suction lift using ethyl petrol. | 10th Nov 1936 | Box 149 \ 4 scan0112 | |
| Graph plotting pump delivery performance in pints per hour against the head of petrol for a Phantom III engine. | 13th Nov 1936 | Box 149 \ 4 scan0113 | |
| Graph showing fuel pump delivery and head loss in a carburetter system for a Phantom III engine. | 14th Nov 1936 | Box 149 \ 4 scan0114 | |
| The return of faulty pumps from the Test Dept. to the S.U. Company for repair. | 18th Nov 1936 | Box 149 \ 4 scan0115 | |
| Trial of quiet petrol pumps on six selected customer cars. | 19th Nov 1936 | Box 149 \ 4 scan0116 | |
| Official order for 6 needles marked L.B.2 from the S.U. Co. of Birmingham. | 19th Nov 1936 | Box 149 \ 4 scan0117 | |
| Letter from Superflexit Ltd. regarding the dispatch of six samples of new tubing for testing. | 20th Nov 1936 | Box 149 \ 4 scan0118 | |
| Letter from Superflexit Ltd. regarding the despatch of six tubes with new internal construction for testing. | 20th Nov 1936 | Box 149 \ 4 scan0119 | |
| Letter to T.C. Skinner of The S.U. Company regarding a drawing of a starting carburetter. | 23th Nov 1936 | Box 149 \ 4 scan0120 | |
| Letter to The S.U. Company Ltd. regarding testing, modifications, and requirements for silenced petrol pumps. | 23th Nov 1936 | Box 149 \ 4 scan0121 | |
| Page 2 of a letter discussing testing alternatives for an armature. | 24th Nov 1936 | Box 149 \ 4 scan0122 | |
| Letter from The S.U. Carburetter Co. Ltd discussing modifications and progress on high lift, high pressure, and silence pumps. | 24th Nov 1936 | Box 149 \ 4 scan0123 | |
| Letter from S.U. Carburetter Co. Ltd. about experimental work on pumps, specifically addressing valve noise and lift. | 24th Feb 1936 | Box 149 \ 4 scan0124 | |
| Modifications to S.U. petrol pumps, specifically the changeover of diaphragms. | 24th Feb 1936 | Box 149 \ 4 scan0125 | |
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