| Description | Date | Identifier | |
| Wear on the Peregrine Water Pump components and proposing material changes. | 14th Jan 1933 | Box 149a \ 1 scan0038 | |
| Cover note for tests on car water pumps with figures approaching boiling point. | 8th May 1933 | Box 149a \ 1 scan0039 | |
| Test results for a 40/50 Phantom water pump and 'V' series radiator at various temperatures and speeds. | 8th May 1933 | Box 149a \ 1 scan0040 | |
| Test data for a 40/50 Phantom water pump and S.S. radiator at various temperatures. | 8th May 1933 | Box 149a \ 1 scan0041 | |
| Water circulation test results for a Phantom water pump and S.S. radiator. | 8th May 1933 | Box 149a \ 1 scan0042 | |
| Blueprint showing the lay-out for pumping velocity tests. | 16th Jun 1933 | Box 149a \ 1 scan0043 | |
| Suggesting the use of RR.66 aluminium alloy for simple castings in the Bentley water system thermostat control. | 16th Jun 1933 | Box 149a \ 1 scan0044 | |
| The corrosion and casting properties of various aluminium alloys. | 16th Jun 1933 | Box 149a \ 1 scan0045 | |
| Modification to the shape of the Bentley bypass water pipe. | 6th Jul 1933 | Box 149a \ 1 scan0046 | |
| Modified water pipe for a Bentley, requesting it be tested after a previous part fractured. | 28th Sep 1933 | Box 149a \ 1 scan0047 | |
| Experimental Phantom water pump using carbon seal rings and thermoflex bellows. | 16th Mar 1934 | Box 149a \ 1 scan0048 | |
| Letter from a supplier discussing manufacturing difficulties with bellows for water pump glands, Part No. 85425. | 19th Jun 1934 | Box 149a \ 1 scan0049 | |
| Technical note comparing water pump specifications for Phantom, Spectre, and 25-HP engine models. | 28th Sep 1934 | Box 149a \ 1 scan0050 | |
| Letter from The Packless Gland Co., Ltd. discussing bellows specifications for a water pump gland. | 26th Jun 1934 | Box 149a \ 1 scan0051 | |
| Requesting manometer readings to investigate water circulation and pump performance for the Spectre engine. | 2nd Oct 1934 | Box 149a \ 1 scan0052 | |
| Water pump specifications for the Phantom, Spectre, and 25-HP engines. | 28th Sep 1934 | Box 149a \ 1 scan0053 | |
| Spectre water pump, detailing a new drawing for a larger pump and changes to the packing glands. | 5th Oct 1934 | Box 149a \ 1 scan0054 | |
| Test report detailing water flow and pressure measurements for the Spectre engine cooling system at various RPMs. | 12th Oct 1934 | Box 149a \ 1 scan0055 | |
| Test report detailing oil and water pressure/flow readings at various engine RPMs. | 12th Oct 1934 | Box 149a \ 1 scan0056 | |
| Analysis of engine cooling system performance, focusing on water flow rates, restrictions, and pump delivery in Phantom and Spectre engines. | 12th Oct 1934 | Box 149a \ 1 scan0057 | |
| Modifications to a Thermoflex Bellows Water Pump to address leakage and heating issues. | 27th Oct 1934 | Box 149a \ 1 scan0058 | |
| Hand-drawn sketch of a rotor shaft assembly with cutaway views and annotations. | 31th Oct 1934 | Box 149a \ 1 scan0059 | |
| Large water pump drawing and the temporary cancellation of the Thermoflex bellows and carbon seal rings design. | 31th Oct 1934 | Box 149a \ 1 scan0060 | |
| Test report on the Phantom II Water Pump, detailing issues with the 'Thermoflex' Bellows and Carbon Gland. | 19th Nov 1934 | Box 149a \ 1 scan0061 | |
| The condition of a carbon thrust bush and rotor, including a pump test chart. | 19th Nov 1934 | Box 149a \ 1 scan0062 | |
| Test report on a Ph.II Water Pump, specifically its Thermoflex Bellows and Carbon Gland. | 29th Mar 1935 | Box 149a \ 1 scan0063 | |
| Letter enclosing drawing E.50308 for a 20/25 HP Water Pump Drive and commenting on the driving shaft's strength. | 11th Apr 1935 | Box 149a \ 1 scan0064 | |
| Tests on Spectre engine water flows, comparing different pump and crankcase passage modifications. | 25th Apr 1935 | Box 149a \ 1 scan0065 | |
| Performance comparison of large and small pumps, detailing flow rates, temperature rise, cavitation, and the impact of different components. | 25th Apr 1935 | Box 149a \ 1 scan0066 | |
| Summary of test results for large and small pumps, focusing on temperature, cavitation, and system flow improvements. | 25th Apr 1935 | Box 149a \ 1 scan0067 | |
| Graph plotting water flow and temperature rise against RPM for a 'Spectre' engine with different pump configurations. | 15th Apr 1935 | Box 149a \ 1 scan0068 | |
| Graph showing the effect of inlet temperature on water flow at 4000 RPM under various pump and radiator configurations. | 26th Nov 1935 | Box 149a \ 1 scan0069 | |
| New parts for the Large Bore Bentley Chassis water pump. | 26th Nov 1935 | Box 149a \ 1 scan0070 | |
| Wear on the Phantom III Water Pump Thrust Bearing and proposing a new scheme with alternative bearing materials. | 5th May 1936 | Box 149a \ 1 scan0071 | |
| Inquiry about the custom manufacture of copper asbestos joint washers to incorporate a filter gauge. | 6th Oct 1936 | Box 149a \ 1 scan0072 | |
| Letter to The Copper & Asbestos Washer Co. enclosing an omitted drawing print. | 7th Oct 1936 | Box 149a \ 1 scan0073 | |
| Letter from The Copper & Asbestos Washer Co. acknowledging a favour and reporting a missing drawing for Filter Gauge Washers. | 7th Oct 1936 | Box 149a \ 1 scan0074 | |
| From The Copper & Asbestos Washer Co acknowledging receipt of a letter and enclosing a print. | 8th Oct 1936 | Box 149a \ 1 scan0075 | |
| Letter from The Copper & Asbestos Washer Co regarding the completion and delivery of experimental samples of filter gauge joints. | 13th Oct 1936 | Box 149a \ 1 scan0076 | |
| Letter from The Copper & Asbestos Washer Co regarding the provision of sample Filter Gauge Joints made to drawing RM. 235. | 14th Oct 1936 | Box 149a \ 1 scan0077 | |
| Letter to The Copper & Asbestos Washer Co. Ltd. regarding sample filter gauze joints for a water joint. | 20th Oct 1936 | Box 149a \ 1 scan0078 | |
| Letter from The Copper & Asbestos Washer Co regarding the unsuitability of sample Gauze Filter Joints and the creation of new samples. | 22th Oct 1936 | Box 149a \ 1 scan0079 | |
| Arrangement drawing of a water pump. | 10th Dec 1936 | Box 149a \ 1 scan0080 | |
| Letter from The Copper & Asbestos Washer Co. Ltd. regarding the unsuccessful development of a satisfactory joint. | 10th Dec 1936 | Box 149a \ 1 scan0081 | |
| Modification to incline the Phantom III water pump grease lubricator for easier access. | 12th Jan 1937 | Box 149a \ 1 scan0082 | |
| Letter from the Experimental Department requesting a specific size of gland packing material for an engine test run. | 27th Jan 1937 | Box 149a \ 1 scan0083 | |
| Official order for gland packing material from Palmetto & Co. Ltd. | 29th Jan 1937 | Box 149a \ 1 scan0084 | |
| Failure of PH.III water pumps due to solder from the radiator, with proposed solutions. | 12th Mar 1937 | Box 149a \ 1 scan0085 | |
| Report confirming a telegram regarding the performance of a Phantom III (35-EX) water pump, thermometer, and engine side guards. | 16th Mar 1937 | Box 149a \ 1 scan0086 | |
| Requesting a trial of a modified water pump for Ph.III units. | 9th Apr 1937 | Box 149a \ 1 scan0087 | |
| Water leak issues at the water pump bend on the Bentley & 25/30, proposing design improvements. | 13th Apr 1937 | Box 149a \ 1 scan0088 | |
| Blueprint for the improvement of the water connection to the cylinder block for a Bentley 25/30. | 13th Apr 1937 | Box 149a \ 1 scan0089 | |
| Testing different jointing materials for the Bentley and 25/30 water pump bend. | 15th Apr 1937 | Box 149a \ 1 scan0090 | |
| Material trials and proposed solutions for the water pump joint on various car models. | 19th Apr 1937 | Box 149a \ 1 scan0091 | |
| Standardisation of a filter gauze between the radiator bottom tank outlet and pump for the Phantom III. | 22th Mar 1937 | Box 149a \ 1 scan0092 | |
| Production note regarding bringing a part into production for the 'C' Series chassis with no extra tool cost. | 23th Apr 1937 | Box 149a \ 1 scan0093 | |
| Two schemes for Bentley and 25/30 Water Pump Bends. | 23th Apr 1937 | Box 149a \ 1 scan0094 | |
| Engine and chassis pairings for Bentley vehicles fitted with Klingerite washers to the water pump joint. | 11th May 1937 | Box 149a \ 1 scan0095 | |
| Re-testing of Klingerite water joint washers on Bentley chassis to resolve leaking issues. | 24th May 1937 | Box 149a \ 1 scan0096 | |
| Request to design a gauze filter for the water pump inlet pipe to prevent damage from detached solder. | 25th May 1937 | Box 149a \ 1 scan0097 | |
| Water pump failure from a Bentley B-130-KT chassis, recommending a gauze be fitted to the intake. | 25th May 1937 | Box 149a \ 1 scan0098 | |
| Requesting instructions for the Wraith water pump gland to have Palmetto packing and for information on the circle butt joint length. | 25th May 1937 | Box 149a \ 1 scan0099 | |
| The failure of a Bentley water pump caused by surplus solder, suggesting a gauze filter as a solution. | 28th May 1937 | Box 149a \ 1 scan0100 | |
| Fix for Bentley water pump failures by fitting a gauze cap to the pump inlet. | 31th May 1937 | Box 149a \ 1 scan0101 | |
| Complaints about the Phantom III water pump and circulation under traffic conditions. | 7th Jun 1937 | Box 149a \ 1 scan0102 | |
| Instructions for an experiment to fit a filter on the water pump elbow for a Bentley 25/30 HP chassis. | 12th Jun 1937 | Box 149a \ 1 scan0103 | |
| Instruction on fitting special joint washers for the water pump on all 25/30 Hp. and Bentley cars from a certain engine number onwards. | 14th Jun 1937 | Box 149a \ 1 scan0104 | |
| Letter to supplier Hardy Spicer Ltd. regarding issues with disintegrating water pump coupling discs and requesting improved test samples. | 17th Jun 1937 | Box 149a \ 1 scan0105 | |
| Letter from Hardy Spicer & Co. Ltd regarding issues with water pump coupling discs and the preparation of two new oil-proof samples. | 18th Jun 1937 | Box 149a \ 1 scan0106 | |
| Order be placed with Messrs Hardy Spicer Ltd. for two water pump coupling discs. | 23th Jun 1937 | Box 149a \ 1 scan0107 | |
| Requesting the fitting of a modified water pump coupling disc to a B.24 engine unit. | 5th Jul 1937 | Box 149a \ 1 scan0108 | |
| Inquiry to The Morgan Crucible Co. Ltd. about carbon sealing rings for a car water pump. | 28th Jul 1937 | Box 149a \ 1 scan0109 | |
| Letter from The Morgan Crucible Company Limited discussing the design of water pump glands, sealing pressure, and materials. | 30th Jul 1937 | Box 149a \ 1 scan0110 | |
| Letter from The Morgan Crucible Company discussing gland design, materials and fitting methods. | 30th Jul 1937 | Box 149a \ 1 scan0111 | |
| Letter to The Morgan Crucible Co. Ltd. requesting information on Morganite material for glands and bearings. | 2nd Aug 1937 | Box 149a \ 1 scan0112 | |
| Series of questions regarding component specifications, including pressure limits and pricing for parts. | 2nd Aug 1937 | Box 149a \ 1 scan0113 | |
| Letter to The Hoffmann Manufacturing Co. Ltd. inquiring about deep groove ball journal bearings for a water pump. | 2nd Aug 1937 | Box 149a \ 1 scan0114 | |
| Acknowledgement of an enquiry from The Hoffmann Manufacturing Co., Ltd. | 3rd Aug 1937 | Box 149a \ 1 scan0115 | |
| Letter from Hoffmann Manufacturing Co. regarding the suitability and supply of a No. 115 thrust bearing. | 4th Aug 1937 | Box 149a \ 1 scan0116 | |
| Letter from The Morgan Crucible Company Limited regarding the design and use of carbon sealing rings and bearings. | 4th Aug 1937 | Box 149a \ 1 scan0117 | |
| Letter from The Morgan Crucible Company detailing pump gland design, leakage, and the chemical composition of F.H. stainless steel. | 4th Aug 1937 | Box 149a \ 1 scan0118 | |
| Letter from The Morgan Crucible Company regarding pump design, water pressure, and carbon seals. | 4th Aug 1937 | Box 149a \ 1 scan0119 | |
| Letter from The Morgan Crucible Company providing a price quote for a patented gland assembly and heat treatment specifications for the material. | 4th Aug 1937 | Box 149a \ 1 scan0120 | |
| Cross-sectional diagram of a centrifugal pump assembly. | 1st Mar 1935 | Box 149a \ 1 scan0121 | |
| Revised Phantom III water pump scheme, its benefits, and the need for endurance testing. | 5th Aug 1937 | Box 149a \ 1 scan0122 | |
| Letter to The Hoffmann Manufacturing Co. Ltd. requesting a quote for bearings in non-corrodible steel. | 10th Aug 1937 | Box 149a \ 1 scan0123 | |
| Quotation from The Hoffmann Manufacturing Co. Ltd. for non-corrodible steel bearings. | 17th Aug 1937 | Box 149a \ 1 scan0124 | |
| Page 2 of a letter from The Hoffmann Manufacturing Co. Ltd. | 17th Aug 1937 | Box 149a \ 1 scan0125 | |
| Standardisation of Palmetto water pump gland packing. | 27th May 1937 | Box 149a \ 1 scan0126 | |
| Nil cost for extra tooling for the 'S2' Series chassis production. | 27th May 1937 | Box 149a \ 1 scan0127 | |
| Standardisation of the Palmetto water pump gland packing for Bentley vehicles. | 27th May 1937 | Box 149a \ 1 scan0128 | |
| Proposal for a production change on Bentley 'M' Series chassis, noting nil extra tool cost. | 16th Dec 1948 | Box 149a \ 1 scan0129 | |
| Issues with the Phantom III water pump coupling, detailing problems caused by insufficient flexibility and suggesting a design review. | 31th May 1937 | Box 149a \ 1 scan0130 | |
| Instructions for an experimental modification to the Phantom III chassis water pump cover to prevent loose solder from entering. | 9th Sep 1937 | Box 149a \ 1 scan0131 | |
| Instructing the creation of a set of parts for testing on W.Bell's water pump rig. | 13th Sep 1937 | Box 149a \ 1 scan0132 | |
| Parts list and blueprint request for a Phantom III Water Pump to be used on an experimental test rig. | 17th Sep 1937 | Box 149a \ 1 scan0133 | |
| Inquiry to The Magnolia Anti-Friction Metal Co. Ltd. regarding the suitability of their 'Mamcol' metallic packing for water pumps. | 24th Sep 1937 | Box 149a \ 1 scan0134 | |
| Requesting a test to determine the torque required to cause a water pump coupling spider to slip on a shaft. | 24th Sep 1937 | Box 149a \ 1 scan0135 | |
| Letter from The Magnolia Anti-Friction Metal Co. suggesting their 'Mamcol' packing for a water pump. | 29th Sep 1937 | Box 149a \ 1 scan0136 | |
| Blueprints and parts for a Wraith III Chassis water pump modification. | 30th Sep 1937 | Box 149a \ 1 scan0137 | |
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