| Description | Date | Identifier | |
| Design considerations and testing of a supercharged engine, focusing on the blower, gears, and carburettor. | 19th Dec 1934 | Box 140 \ 1 scan0096 | |
| The estimated performance of a supercharged Bentley engine. | 20th Dec 1934 | Box 140 \ 1 scan0097 | |
| Analysis of power curves and blower efficiency, proposing a modified blower design for an 8-cylinder engine. | 20th Dec 1934 | Box 140 \ 1 scan0098 | |
| Graph showing the estimated effect of varying compression ratio on Bentley engine performance. | 23th Jan 1934 | Box 140 \ 1 scan0099 | |
| Graph showing the estimated effect of varying boost on a Bentley engine with a 6.5/1 compression ratio. | 27th Nov 1934 | Box 140 \ 1 scan0100 | |
| Performance chart showing the estimated performance of a Bentley engine with boost against compression ratio. | 28th Nov 1934 | Box 140 \ 1 scan0101 | |
| Performance graph comparing supercharged and unsupercharged versions of a Graham-Paige S/C engine. | 20th Dec 1934 | Box 140 \ 1 scan0102 | |
| Letter to the Graham-Paige Corporation regarding supercharger testing on a 3 1/2 litre engine. | 20th Dec 1934 | Box 140 \ 1 scan0103 | |
| Results of a 10,000-mile test on a Graham car's blower gears. | 20th Dec 1934 | Box 140 \ 1 scan0104 | |
| Performance graph for a 3 1/2 litre engine, comparing supercharged and unsupercharged variants. | 20th Dec 1934 | Box 140 \ 1 scan0105 | |
| Performance graph for a Graham-Paige S/C engine, comparing supercharged and unsupercharged configurations. | 31th Dec 1934 | Box 140 \ 1 scan0106 | |
| Brief report on work carried out with the Graham Supercharger on a B-12 unit for a Bentley. | 31th Dec 1934 | Box 140 \ 1 scan0107 | |
| Modifications to an S.U. carburetter and supercharger to improve engine power and slow running performance. | 21th Dec 1934 | Box 140 \ 1 scan0108 | |
| Test report on engine performance at 750 r.p.m. concerning a 'building up' issue. | 21th Dec 1934 | Box 140 \ 1 scan0109 | |
| Performance graph comparing various supercharged and non-supercharged configurations for a Graham Supercharger on a Bentley engine. | 12th Dec 1934 | Box 140 \ 1 scan0110 | |
| Performance graph for a Graham Supercharger on a Bentley engine. | 12th Dec 1934 | Box 140 \ 1 scan0111 | |
| Performance graph comparing supercharged and non-supercharged configurations for a Graham supercharger on a Bentley engine. | 12th Dec 1934 | Box 140 \ 1 scan0112 | |
| Performance graph comparing different configurations of a Graham supercharger on a Bentley engine. | 12th Dec 1934 | Box 140 \ 1 scan0113 | |
| Performance graph for a Graham Supercharger on a Bentley engine, plotting Boost Pressure against RPM under three test conditions. | 12th Dec 1934 | Box 140 \ 1 scan0114 | |
| Performance graph of a Graham Supercharger on a Bentley, comparing boost temperature against RPM under different configurations. | 12th Dec 1934 | Box 140 \ 1 scan0115 | |
| Graph of boost temperature vs RPM for a Graham Supercharger on a Bentley. | 12th Feb 1934 | Box 140 \ 1 scan0116 | |
| Blueprint showing the installation of a Graham Supercharger on a Bentley engine. | 20th Dec 1937 | Box 140 \ 1 scan0117 | |
| Blueprint detailing the installation of a Graham Supercharger on a Bentley engine. | 20th Dec 1934 | Box 140 \ 1 scan0118 | |
| Order for a replacement Graham-Paige supercharger casting for Bentley order 54107. | 28th Dec 1934 | Box 140 \ 1 scan0119 | |
| Request to manufacture a coupling for rig tests on a B-12 unit's blower. | 10th Jan 1935 | Box 140 \ 1 scan0120 | |
| Modifications and sourcing parts for a car supercharger. | 17th Jan 1935 | Box 140 \ 1 scan0121 | |
| Requesting the fitting of an R.R. dural rotor to a Supercharger B-12 unit. | 25th Jan 1935 | Box 140 \ 1 scan0122 | |
| Request to remove a supercharger rotor casing from a Graham car in order to take measurements. | 21th Jan 1935 | Box 140 \ 1 scan0123 | |
| Two different arrangements for a supercharged unit's crankcase and crankshaft. | 29th Jan 1935 | Box 140 \ 1 scan0124 | |
| Request to hold crankcase production for modifications and release details for alternative supercharger positions on the Bentley. | 2nd Feb 1935 | Box 140 \ 1 scan0125 | |
| Challenges of creating a silent and durable supercharger drive for the Bentley. | 4th Feb 1935 | Box 140 \ 1 scan0126 | |
| Power and induction system experiments for a Supercharged Bentley Unit. | 4th Feb 1935 | Box 140 \ 1 scan0127 | |
| The development and testing of supercharger components including worm gears, carburetters, and blowers. | 4th Feb 1935 | Box 140 \ 1 scan0128 | |
| Performance graph for Supercharged Unit B.12 comparing different engine configurations with a Graham Blower. | 30th Jan 1935 | Box 140 \ 1 scan0129 | |
| Experimental schemes for supercharging a Bentley. | 5th Feb 1935 | Box 140 \ 1 scan0130 | |
| Installation of Supercharged Unit B-12 and the required chassis modifications to avoid fouling the steering box. | 6th Feb 1935 | Box 140 \ 1 scan0131 | |
| New camshaft for Bentley models with silent tappets and its potential use on the supercharger version. | 14th Feb 1935 | Box 140 \ 1 scan0132 | |
| The fitting of a Graham supercharger to a Bentley engine for road demonstration. | 14th Feb 1935 | Box 140 \ 1 scan0133 | |
| Request to manufacture two springs for a Bentley Auto Boost Control. | 25th Feb 1935 | Box 140 \ 1 scan0134 | |
| Use of an air silencer for a supercharged Bentley engine. | 15th Feb 1935 | Box 140 \ 1 scan0135 | |
| Visit to Mc Evoy Superchargers, detailing their products, contracts, and a comparison with the Zoller blower. | 25th Feb 1935 | Box 140 \ 1 scan0136 | |
| New design scheme for the supercharged Bentley B-12 unit. | 26th Feb 1935 | Box 140 \ 1 scan0137 | |
| Request regarding parts for the carburetter flange on a Bentley Supercharger. | 26th Feb 1935 | Box 140 \ 1 scan0138 | |
| The demonstration of a Bentley with a Graham Paige supercharger. | 27th Feb 1935 | Box 140 \ 1 scan0139 | |
| Request for delivery dates for a Bentley camshaft and supercharger diffuser pieces to schedule testing for Supercharged Unit B-12. | 28th Feb 1935 | Box 140 \ 1 scan0140 | |
| Delay in demonstrating a supercharged Bentley due to waiting for gears from America. | 28th Feb 1935 | Box 140 \ 1 scan0141 | |
| Sending Supercharged Unit B-12 to the shop for fitting a blower, a new camshaft, and investigating low oil pressure. | 28th Feb 1935 | Box 140 \ 1 scan0142 | |
| Specification for the construction of a new supercharged unit B-14. | 4th Mar 1935 | Box 140 \ 1 scan0143 | |
| Clarifying instructions and parts requirements for supercharging the Bentley. | 8th Mar 1935 | Box 140 \ 1 scan0144 | |
| Record of modifications and testing procedures for engine components B-12 and B-14. | 8th Mar 1935 | Box 140 \ 1 scan0145 | |
| Modifications and a subsequent failure of a B-12 unit. | 4th Mar 1935 | Box 140 \ 1 scan0146 | |
| Request to make two adaptors for a supercharged Bentley. | 23th Mar 1935 | Box 140 \ 1 scan0147 | |
| Fuel distribution challenges in twin volute superchargers and the decision to focus on a single volute design. | 3rd Apr 1935 | Box 140 \ 1 scan0148 | |
| Confirming preparations for a visitor's review of a Spectre 2 car and a supercharged Bentley. | 10th Apr 1935 | Box 140 \ 1 scan0149 | |
| Instructions for workshop modifications and fault diagnosis on supercharged units B-12 and B-14. | 10th Apr 1935 | Box 140 \ 1 scan0150 | |
| Two small modifications to be carried out on a two-speed supercharger. | 10th Apr 1935 | Box 140 \ 1 scan0151 | |
| Design and development of a supercharger drive for a Bentley. | 11th Apr 1935 | Box 140 \ 1 scan0152 | |
| Modifications to a blower's mounting, drive casing, and drive ratios. | 11th Apr 1935 | Box 140 \ 1 scan0153 | |
| Blueprints and modifications for a Humphrey Sandberg freewheel clutch for a two-speed supercharger. | 11th Apr 1935 | Box 140 \ 1 scan0154 | |
| From 'Sg' to 'Rm' regarding the delayed demonstration of a Bentley fitted with a Graham Paige supercharger. | 12th Apr 1935 | Box 140 \ 1 scan0155 | |
| Testing the placement of a supercharger on a Bentley engine, noting delays with American parts. | 12th Apr 1935 | Box 140 \ 1 scan0156 | |
| Modifications to a supercharged Bentley's induction system to improve slow running and distribution. | 12th Apr 1935 | Box 140 \ 1 scan0157 | |
| Engine modifications concerning exhaust bends, supercharging arrangements, and carburetor comparisons. | 12th Apr 1935 | Box 140 \ 1 scan0158 | |
| Progress report on the development and testing of a new blower, supercharger, and associated drive components. | 18th Apr 1935 | Box 140 \ 1 scan0159 | |
| Blueprint showing the arrangement of a supercharger on a Bentley. | 9th Apr 1935 | Box 140 \ 1 scan0160 | |
| Performance graph for a supercharged engine (Unit B.12) with a Graham Blower, comparing different rotor types against an unsupercharged configuration. | 9th Apr 1935 | Box 140 \ 1 scan0161 | |
| Performance results and design considerations for a supercharged Bentley engine. | 15th Apr 1935 | Box 140 \ 1 scan0162 | |
| Induction system modifications to address cylinder richness and acceleration issues. | 15th Apr 1935 | Box 140 \ 1 scan0163 | |
| Letter from Michigan Tool Company apologizing for a delay and detailing a design change for an order of supercharger gears. | 22th Apr 1935 | Box 140 \ 1 scan0164 | |
| Requesting to fit old D.B.S. gears to a B-12 rebuild for slow running experiments due to a delay with American supercharger gears. | 26th Apr 1935 | Box 140 \ 1 scan0165 | |
| Faulty B-14 supercharger unit that is consuming excessive oil. | 24th Apr 1935 | Box 140 \ 1 scan0166 | |
| From Sg. to Hs. arranging to test a car with a Graham Paige supercharger. | 29th Apr 1935 | Box 140 \ 1 scan0167 | |
| Experimental supercharging of a Bentley, referencing the 'Centric' supercharger and information from Mr. Briggs Cunningham. | 19th Sep 1936 | Box 140 \ 1 scan0168 | |
| Customer testimonial regarding a supercharged car and an internal query about the 'Centric' supercharger. | 11th Sep 1936 | Box 140 \ 1 scan0169 | |
| Letter to the Institute of Automobile Engineers enclosing curves related to a paper on Supercharging. | 1st Jan 1935 | Box 140 \ 1 scan0170 | |
| Requesting permission to share supercharging performance curves with the Institute of Automobile Engineers. | 24th Dec 1935 | Box 140 \ 1 scan0171 | |
| Letter from Centric Super-Chargers Ltd. offering a supercharger for testing on Bentley cars. | 18th Nov 1935 | Box 140 \ 1 scan0172 | |
| Blueprint of a vane ring adapted for a Graham supercharger on a Bentley. | 30th Oct 1936 | Box 140 \ 1 scan0173 | |
| Blueprint graph of boost pressure curves for a Supercharged Bentley, comparing diffuser and non-diffuser type superchargers. | 8th May 1935 | Box 140 \ 1 scan0174 | |
| Progress and road testing of an experimental Bentley supercharger. | 8th May 1935 | Box 140 \ 1 scan0175 | |
| The fitting of new 29/6 ratio gears from America to Supercharged Bentley units. | 10th May 1935 | Box 140 \ 1 scan0176 | |
| Testing of a Bentley Supercharger to assess its performance, roughness, and noise. | 9th May 1935 | Box 140 \ 1 scan0177 | |
| Testing procedures for a freewheel clutch on a two-speed supercharger drive. | 9th May 1935 | Box 140 \ 1 scan0178 | |
| Requesting a supercharger from a Graham-Paige car be sent to the shop to copy some of its parts. | 13th May 1935 | Box 140 \ 1 scan0179 | |
| Request for the return of a Graham Supercharger shaft that was sent in error. | 11th May 1935 | Box 140 \ 1 scan0180 | |
| Requesting an official order for Graham-Paige supercharger parts from Cleverleys Ltd. | 21th May 1935 | Box 140 \ 1 scan0181 | |
| Letter from Cleverlys Limited regarding a delay and proposed solution for supplying supercharger parts. | 22th May 1935 | Box 140 \ 1 scan0182 | |
| To Roy about cancelling an order with Cleverleys, in relation to Graham-Paige. | 25th May 1935 | Box 140 \ 1 scan0183 | |
| Letter to Cleverleys Ltd. declining to proceed with a supercharger enquiry. | 25th May 1935 | Box 140 \ 1 scan0184 | |
| Request to install a second set of American gears into a supercharger blower. | 31th May 1935 | Box 140 \ 1 scan0185 | |
| Request to fit a 7 bladed diffuser to a Supercharger off a B-12 Unit. | 7th Aug 1935 | Box 140 \ 1 scan0186 | |
| Request to taper off the rotor blades at the inlet for the supercharger from the B-12 Unit. | 16th Jul 1935 | Box 140 \ 1 scan0187 | |
| Requesting a new seven-vaned diffuser for a Bentley Supercharger due to noise issues with the current nine-bladed one. | 17th Jul 1935 | Box 140 \ 1 scan0188 | |
| Letter from Eustace Watkins Ltd regarding an out-of-stock 'Drive from Dynamo to Supercharger' part, with a suggestion to repair the broken part and an accompanying sketch. | 26th Aug 1935 | Box 140 \ 1 scan0189 | |
| Road and test bed results for a supercharged Bentley, including diffuser development. | 30th Oct 1935 | Box 140 \ 1 scan0190 | |
| Issues with a diffuser supercharger, concluding its unsuitability for cars due to noise and performance characteristics. | 30th Oct 1935 | Box 140 \ 1 scan0191 | |
| Investigation into poor slow running performance caused by the supercharger and various attempts to improve it. | 30th Oct 1935 | Box 140 \ 1 scan0192 | |
| Recommendations for engine component design and a proposal for a supercharged 6-cylinder engine for the next Bentley car. | 30th Oct 1935 | Box 140 \ 1 scan0193 | |
| Next steps to proceed with building a supercharging unit. | 30th Oct 1935 | Box 140 \ 1 scan0194 | |
| Diagram of a water-jacketed petrol collector for a supercharged engine. | 23th Oct 1935 | Box 140 \ 1 scan0195 | |
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