| Description | Date | Identifier | |
| Performance characteristics chart for a supercharged Bentley blower. | 23th Oct 1935 | Box 140 \ 1 scan0196 | |
| Experimental centrifugal supercharger and induction pipes for a Bentley. | 9th Nov 1936 | Box 140 \ 1 scan0197 | |
| Letter from Centric Super-Chargers Ltd. to Bentley Motors offering design and supply services for superchargers. | 6th Apr 1937 | Box 140 \ 1 scan0198 | |
| Letter to Centric Super-Chargers Ltd. declining to further discuss their supercharger. | 8th Apr 1937 | Box 140 \ 1 scan0199 | |
| Letter from Centric Super-Chargers acknowledging Rolls Royce's decision not to consider their superchargers further at this time. | 9th Apr 1927 | Box 140 \ 1 scan0200 | |
| The design challenges of fitting a centrifugal supercharger to Push Rod Bentley engines. | 25th Jun 1937 | Box 140 \ 1 scan0201 | |
| Patent specification for improvements to internal combustion engines and superchargers therefor. | 22th Jul 1936 | Box 140 \ 1 scan0202 | |
| Patent specification detailing a supercharger system with an adjustable mounting and flexible ducting for an internal combustion engine. | 13th Apr 1937 | Box 140 \ 1 scan0203 | |
| Complete specification drawings showing various views of an engine's overhead valve mechanism. | 28th Mar 1938 | Box 140 \ 1 scan0204 | |
| Preprint of a paper investigating the fundamentals of supercharging. | 28th Mar 1938 | Box 140 \ 1 scan0205 | |
| Research program report on engine performance using dynamometer tests, different compression ratios, and supercharging. | 28th Mar 1938 | Box 140 \ 1 scan0206 | |
| Paper discussing the influence of supercharging and compression ratio on various engine performance metrics. | 28th Mar 1938 | Box 140 \ 1 scan0207 | |
| Description of fuel flow and consumption testing apparatus, including carburetter air-fuel ratio control. | 28th Mar 1938 | Box 140 \ 1 scan0208 | |
| Test results document discussing gross power output, fuel economy, and the effects of supercharging on intake manifold pressures. | 28th Mar 1938 | Box 140 \ 1 scan0209 | |
| Data table and analysis of intake manifold depression and total boost at various engine speeds for different compression ratios. | 28th Mar 1938 | Box 140 \ 1 scan0210 | |
| The formula for calculating the power charged to a supercharger. | 28th Mar 1938 | Box 140 \ 1 scan0211 | |
| Analysis of engine power output and fuel consumption, comparing supercharged and unsupercharged performance at different compression ratios. | 28th Mar 1938 | Box 140 \ 1 scan0212 | |
| Otto cycle efficiency, specific fuel consumption, and the effects of supercharging on engine performance. | 28th Mar 1938 | Box 140 \ 1 scan0213 | |
| Page comparing actual test horsepower data with theoretical calculations, including a heat balance table for an unsupercharged engine. | 28th Mar 1938 | Box 140 \ 1 scan0214 | |
| Tables of energy distribution percentages for supercharged engines at different compression ratios and speeds. | 28th Mar 1938 | Box 140 \ 1 scan0215 | |
| Table and analysis of power increase from supercharging an engine with a 5.55 to 1 compression ratio. | 28th Mar 1938 | Box 140 \ 1 scan0216 | |
| The effects of supercharging on spark advance and exhaust gas temperatures at different compression ratios. | 28th Mar 1938 | Box 140 \ 1 scan0217 | |
| Analysis of test results comparing theoretical and actual engine performance with supercharging. | 28th Mar 1938 | Box 140 \ 1 scan0218 | |
| Page detailing equations and theoretical considerations for calculating engine power and work. | 28th Mar 1938 | Box 140 \ 1 scan0219 | |
| Technical analysis of 'complete' and 'normal' engine scavenging cycles with associated theoretical calculations. | 28th Mar 1938 | Box 140 \ 1 scan0220 | |
| Page of thermodynamic equations defining variables and calculations for work and scavenging. | 28th Mar 1938 | Box 140 \ 1 scan0221 | |
| Analysis of engine performance, comparing actual engine results with theoretical cycles, particularly concerning supercharging and scavenging. | 28th Mar 1938 | Box 140 \ 1 scan0222 | |
| Page discussing the power output of supercharged engines, considering factors like blower power, air temperature, and air-fuel ratios. | 28th Mar 1938 | Box 140 \ 1 scan0223 | |
| Page detailing heat balance and the effects of supercharging on octane number requirements, with a data table. | 28th Mar 1938 | Box 140 \ 1 scan0224 | |
| Page detailing fuel octane requirements and the effects of supercharging on engine durability and spark plugs. | 28th Mar 1938 | Box 140 \ 1 scan0225 | |
| Report page detailing the performance and maintenance requirements of various engine valves and bearings under test conditions. | 2nd Sep 1938 | Box 140 \ 1 scan0226 | |
| Request to design a scheme to adapt a Kestrel type supercharger to a Wraith II portable rig engine for experiments. | 2nd Sep 1938 | Box 140 \ 1 scan0227 | |
| Request for an old Kestrel 2.S. type supercharger with reduction gear for experimental tests on chassis units. | 4th Oct 1938 | Box 140 \ 1 scan0228 | |
| The Melbourne Engineering Co's two-stage roots blower supercharger. | 5th Oct 1938 | Box 140 \ 1 scan0229 | |
| Inspection report on a two-stage roots blower supercharger from Melbourne Engineering Co. | 5th Oct 1938 | Box 140 \ 1 scan0230 | |
| Specifications and test details for a high-speed blower, discussing performance, weight, and potential applications. | 27th Sep 1938 | Box 140 \ 1 scan0231 | |
| Diagrammatic arrangement of the Melbourne Engineering Co's Supercharger. | 27th Sep 1938 | Box 140 \ 1 scan0232 | |
| The manufacture of shortage parts for an obsolete Kestrel supercharger. | 8th Oct 1938 | Box 140 \ 1 scan0233 | |
| Parts list for a scheme to adapt a Kestrel supercharger to a Wraith 11. Rig Engine. | 11th Nov 1938 | Box 140 \ 1 scan0234 | |
| Parts list with quantities and production instructions, page 2. | 9th Nov 1938 | Box 140 \ 1 scan0235 | |
| Requesting the adaption of a Kestrel type supercharger to the Wraith II No.1 unit. | 15th Nov 1938 | Box 140 \ 1 scan0236 | |
| Suggesting a 24-hour endurance test for a supercharged 'M' Series Bentley to counteract competitor publicity and requesting tests on a new air intake. | 1st Dec 1938 | Box 140 \ 1 scan0237 | |
| Letter to Smiths' Jacking Systems requesting improvements to a portable jack. | 8th Aug 1939 | Box 140 \ 1 scan0238 | |
| Order for a jack to be sent to Sessions. | 8th Aug 1939 | Box 140 \ 1 scan0239 | |
| Letter from Smith's Jacking Systems Ltd acknowledging receipt of suggestions for a new design. | 10th Aug 1939 | Box 140 \ 1 scan0240 | |
| Letter from Smith's Jacking Systems Ltd regarding the redesign of a Hydrolift jack for a heavier car. | 15th Aug 1939 | Box 140 \ 1 scan0241 | |
| Letter from Smith's Jacking Systems Ltd regarding a redesigned Hydrolift jack blue print. | 24th Aug 1939 | Box 140 \ 1 scan0242 | |
| Blueprint of a Hydrolift component with cross-section and external views. | 24th Aug 1939 | Box 140 \ 1 scan0243 | |
| Letter to Messrs. Smith's Jacking Systems Ltd. acknowledging receipt of a blueprint and delaying a response. | 29th Aug 1939 | Box 140 \ 1 scan0244 | |
| Letter to Smith's Jacking Systems Ltd. regarding an experimental jack for heavier cars. | 31th Aug 1939 | Box 140 \ 1 scan0245 | |
| Letter from Smith's Jacking Systems Ltd regarding a special jack design for heavier cars. | 1st Sep 1939 | Box 140 \ 1 scan0246 | |
| Requesting a quart tin of Smiths Jackall Fluid for topping up hand operated jacks. | 11th Jan 1940 | Box 140 \ 1 scan0247 | |
| Return of a faulty Smiths Hydraulic Jack to the manufacturer for repairs. | 31th Jan 1940 | Box 140 \ 1 scan0248 | |
| Letter to Smiths Jacking Systems Ltd. concerning issues with hand-operated hydraulic jacks on experimental cars. | 2nd Feb 1940 | Box 140 \ 1 scan0249 | |
| Commissioning a trunnion mounting for a jack to prevent it being twisted off. | 9th Feb 1940 | Box 140 \ 1 scan0250 | |
| Despatch of three hydraulic jacks to Messrs Smith's Jacking Systems, Ltd. for examination and modification. | 13th Feb 1940 | Box 140 \ 1 scan0251 | |
| Sessions Portable Jacks and their suitability for front and rear bumper designs. | 24th Feb 1940 | Box 140 \ 1 scan0252 | |
| Letter to Smith's Jacking Systems Ltd. concerning the design of a trunnion mounting for portable hydraulic jacks. | 14th May 1940 | Box 140 \ 1 scan0253 | |
| Communication regarding modifications to a bumper, forging, and jack for the rear of a chassis. | 15th Oct 1940 | Box 140 \ 1 scan0254 | |
| Letter from Smith's Jacking Systems Ltd. requesting blueprints for existing jack mountings to propose an improved scheme. | 30th Apr 1940 | Box 140 \ 1 scan0255 | |
| Letter from Smith's Jacking Systems Ltd regarding a trunnion scheme for a jack bracket. | 16th May 1940 | Box 140 \ 1 scan0256 | |
| Proposal from Smiths Jacking Systems for a hydraulic jack trunnion fixing. | 17th Dec 1940 | Box 140 \ 1 scan0257 | |
| Urgent need to acquire jacks and suggesting alternatives to those from Dunlops. | 28th Jul 1941 | Box 140 \ 1 scan0258 | |
| Requesting a covering order to trial a new, cheaper fluid for the jacking system and inquiring about the cost of the current fluid. | 6th May 1937 | Box 140 \ 2 scan0001 | |
| Invoice for hydraulic jack fluid from Donald Sessions & Co. | 5th May 1937 | Box 140 \ 2 scan0002 | |
| The standardisation of the Phantom III Jacking System and the testing of a cheaper oil tank. | 6th May 1937 | Box 140 \ 2 scan0003 | |
| Letter to Donald Sessions & Co.Ltd. regarding the adoption of jack rams, pump units, and oil tanks for the Phantom III chassis. | 6th May 1937 | Box 140 \ 2 scan0004 | |
| Letter from Donald Sessions & Company Ltd. regarding the adoption of jack rams, rubber glands and a cheaper tank for Phantom III cars. | 7th May 1937 | Box 140 \ 2 scan0005 | |
| Arrangement of a fluid tank with associated components. | 6th Apr 1937 | Box 140 \ 2 scan0006 | |
| Fitting of a D.W.S. standard jack pump to the Phantom III chassis. | 7th May 1937 | Box 140 \ 2 scan0007 | |
| Request for a replacement bracket for a portable hydraulic jack. | 19th May 1937 | Box 140 \ 2 scan0008 | |
| Request to cast a new pair of Lockheed jack brackets for car 39-EX, using existing brackets as patterns. | 20th May 1937 | Box 140 \ 2 scan0009 | |
| Modifying the piping for hydraulic jacks on the PH.III model to improve clearance for coachbuilders. | 22th May 1937 | Box 140 \ 2 scan0010 | |
| Revised business arrangements for jack manufacturing following the acquisition of Donald Sessions by S. Smith & Sons. | 22th May 1937 | Box 140 \ 2 scan0011 | |
| Use of a standard Sessions Jack Pump on the Phantom III model, detailing modifications to the floorboards. | 22th May 1937 | Box 140 \ 2 scan0012 | |
| On using standard Sessions jack pumps for the Phantom III to reduce cost and weight. | 28th May 1937 | Box 140 \ 2 scan0013 | |
| Failures of the D.W.S. / Sessions jacking system on the Phantom III chassis due to foreign matter. | 1st Jun 1937 | Box 140 \ 2 scan0014 | |
| Procedure for handling defective parts of the D.W.S. Jacking System for the Phantom III. | 1st Jun 1937 | Box 140 \ 2 scan0015 | |
| Letter from S. Smith & Sons regarding manufacturing difficulties and pricing for a JACKALL system. | 10th Jun 1937 | Box 140 \ 2 scan0016 | |
| Letter from S. Smith & Sons apologising for not being able to deliver a promised sample set. | 14th Jun 1937 | Box 140 \ 2 scan0017 | |
| Letter from Automotive Products Company Ltd. regarding faulty double extension jacks and a proposed modification for their protection. | 14th Jun 1937 | Box 140 \ 2 scan0018 | |
| Letter to Automotive Products Co. Ltd. regarding leaking jacks after 20,000 miles of use. | 15th Jun 1937 | Box 140 \ 2 scan0019 | |
| The standardisation of cheaper hydraulic jacks on the Phantom III. | 15th Jun 1937 | Box 140 \ 2 scan0020 | |
| Letter from Automotive Products Company regarding the return of jacks with a revised locking method and patent issues with a pump. | 16th Jun 1937 | Box 140 \ 2 scan0021 | |
| Return of six Phantom III hydraulic jacks to Automotive Products Ltd. for alteration. | 17th Jun 1937 | Box 140 \ 2 scan0022 | |
| Letter from the Experimental Department returning a drawing of an electric jack. | 25th Jun 1937 | Box 140 \ 2 scan0023 | |
| Hydraulic jack system for the Wraith III chassis, comparing components with the Phantom III. | 25th Jun 1937 | Box 140 \ 2 scan0024 | |
| The despatch of four Phantom III hydraulic jacks for modification. | 26th Jun 1937 | Box 140 \ 2 scan0025 | |
| Letter to Donald Sessions & Co., Ltd. regarding the interchangeability of jacks between the Phantom III and 25 HP models. | 29th Jun 1937 | Box 140 \ 2 scan0026 | |
| Letter from Windovers Limited regarding a Phantom III demonstration and an electric lifting jack. | 29th Jun 1937 | Box 140 \ 2 scan0027 | |
| Letter to Windovers Limited discussing the feasibility and design considerations of the 'Elwa' Electric Jack. | 30th Jun 1937 | Box 140 \ 2 scan0028 | |
| Letter to Messrs. Windovers Ltd. regarding an electric jack. | 30th Jun 1937 | Box 140 \ 2 scan0029 | |
| Letter from Donald Sessions & Company Ltd. regarding the interchangeability of Phantom III jacks with the 25 HP chassis. | 30th Jun 1937 | Box 140 \ 2 scan0030 | |
| Letter from Elwa-Elektro A.G. discussing the demonstration and potential integration of their Electric Motor-Jack. | 8th Jul 1937 | Box 140 \ 2 scan0031 | |
| Instructions from Elwa-Electro Ltd. for connecting cables and plugs for an electric car hoist. | 8th Jul 1937 | Box 140 \ 2 scan0032 | |
| Promotional leaflet for the 'ELWA' electric motor-jack. | 8th Jul 1937 | Box 140 \ 2 scan0033 | |
| Specifications and operational details for an electric jack for touring cars. | 10th Aug 1937 | Box 140 \ 2 scan0034 | |
| The inaccessibility of the Phantom III's front hydraulic jacks for servicing. | 10th Aug 1937 | Box 140 \ 2 scan0035 | |
| Letter to Automotive Products Co. Ltd. regarding the supply and testing of Lockheed hydraulic jacks for the Phantom III chassis. | 3rd Sep 1937 | Box 140 \ 2 scan0036 | |
| Letter from Donald Sessions & Company Ltd. concerning new designs for D.W.S. jacks and their attachment to a car. | 3rd Sep 1937 | Box 140 \ 2 scan0037 | |
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