| Description | Date | Identifier | |
| The initial trial and performance of a new 8-Cylinder Rationalised Engine. | 29th Apr 1939 | Box 109 \ 4 scan0079 | |
| Instruction memo to shorten a 3rd and 4th sliding piece for a gearbox. | 8th May 1939 | Box 109 \ 4 scan0080 | |
| 'Secret' memo detailing a positive test drive review of an 8-Cylinder High Power Unit car after a 190-mile run. | 9th May 1939 | Box 109 \ 4 scan0081 | |
| Cover note apologising for the late distribution of a memo regarding an 8 Cylinder High Power Unit. | 11th May 1939 | Box 109 \ 4 scan0082 | |
| Test driver's impressions and critique of an 8-cylinder car's performance. | 13th May 1939 | Box 109 \ 4 scan0083 | |
| Request to produce a modified fan for car model 30.G.VII with specific blade adjustments. | 15th May 1939 | Box 109 \ 4 scan0084 | |
| Request for an opinion on the electrical starting device fitted to model 30.G.VII. | 20th Jun 1939 | Box 109 \ 4 scan0085 | |
| Outlining modifications for cars 30.G.VII and a Buick before a trip to Brooklands. | 27th May 1939 | Box 109 \ 4 scan0086 | |
| Secret memo confirming arrangements for a car to meet individuals at a train station and for a subsequent journey. | 1st Jun 1939 | Box 109 \ 4 scan0087 | |
| Scheme for adding an extra shutter to the bonnet side plate for a Wraith 80 model. | 6th Jun 1939 | Box 109 \ 4 scan0088 | |
| Fitting a 22-gallon petrol tank to a car before a 15,000-mile test. | 9th Jun 1939 | Box 109 \ 4 scan0089 | |
| Unsatisfactory pulleys on car 30.G.VII and instructions for replacement and other inspections. | 12th Jun 1939 | Box 109 \ 4 scan0090 | |
| Instructions for fitting thermometers and oil pressure gauges to specific cars for France. | 15th Jun 1939 | Box 109 \ 4 scan0091 | |
| Request to design softer front springs for models W.80 and B.80 with supporting weight and load data. | 10th Jun 1939 | Box 109 \ 4 scan0092 | |
| Instructing HEB to ensure springs are detailed when drawn and to order one pair of each type. | 16th Jun 1939 | Box 109 \ 4 scan0093 | |
| Request to modify a standard Wraith fan that was incorrectly fitted to chassis 30.G.VII. | 21th Jun 1939 | Box 109 \ 4 scan0094 | |
| Requesting the replacement of a Bijur pipe coil with a Superflexit flexible pipe for the 30.G.VII Bijur System. | 23th Jun 1939 | Box 109 \ 4 scan0095 | |
| Road wheel dynamometer tests, investigating power loss and carburettor performance. | 26th Jun 1939 | Box 109 \ 4 scan0096 | |
| Analysis of power curve C, air resistance coefficients, and tyre losses for a Phantom III at Brooklands. | 26th Jun 1939 | Box 109 \ 4 scan0097 | |
| Graph of road wheel dynamometer power curves in direct gear. | 15th Jun 1939 | Box 109 \ 4 scan0098 | |
| Performance chart showing corrected Brake Horsepower curves against Engine RPM for chassis 30 G VII. | 27th Jun 1939 | Box 109 \ 4 scan0099 | |
| Requesting the exchange of a brake shoe and the stripping of a servo for liner examination. | 27th Jun 1939 | Box 109 \ 4 scan0100 | |
| Test bed running report and specification for B.80 Unit No. 5 after 30,000 miles. | 29th Jun 1939 | Box 109 \ 4 scan0101 | |
| Engine performance characteristics including power output, detonations, and oil consumption. | 29th Jun 1939 | Box 109 \ 4 scan0102 | |
| Valve bounce tests comparing Ph.III and Swedish wire double springs. | 29th Jun 1939 | Box 109 \ 4 scan0103 | |
| Engine performance issues concerning valve bounce, induction systems, and slow running. | 29th Jun 1939 | Box 109 \ 4 scan0104 | |
| Timing gears, dampers, and camshaft thrust issues in B.60 and B.80 engines. | 29th Jun 1939 | Box 109 \ 4 scan0105 | |
| Various engine leaks and joint issues, including rocker covers and tappet doors. | 29th Jun 1939 | Box 109 \ 4 scan0106 | |
| Exhaust manifold failures and the condition of a stripped engine, specifically a seized camshaft bearing. | 29th Jun 1939 | Box 109 \ 4 scan0107 | |
| Graph comparing engine power output (BHP & MEP) at various RPMs for the B80 No. 5 unit, with open exhaust versus a silencer. | 1st Sep 1942 | Box 109 \ 4 scan0108 | |
| Photograph of a cast iron elbow pipe with mounting flanges. | 30th Jun 1939 | Box 109 \ 4 scan0109 | |
| The final test curves for an 8-cylinder car, detailing horsepower losses and performance improvements. | 30th Jun 1939 | Box 109 \ 4 scan0110 | |
| Visit to Brooklands to conduct comparative cooling tests on a 30.G.VII and a Buick. | 3rd Jul 1939 | Box 109 \ 4 scan0111 | |
| Cooling system tests, comparing radiator block designs, fan configurations, and the performance of a Buick against a Wraith model. | 3rd Jul 1939 | Box 109 \ 4 scan0112 | |
| Report page detailing results from underbonnet temperature and various miscellaneous cooling system tests. | 3rd Jul 1939 | Box 109 \ 4 scan0113 | |
| Maximum speeds and acceleration times under various test conditions, including different fan configurations. | 3rd Jul 1939 | Box 109 \ 4 scan0114 | |
| Table of vehicle acceleration times for various speed ranges. | 3rd Jul 1939 | Box 109 \ 4 scan0115 | |
| Graph comparing the performance of different cooling fans on a Wraith 80 chassis, conducted at Brooklands. | 28th Jun 1939 | Box 109 \ 4 scan0116 | |
| Graph from the Brooklands Tests comparing the performance of two radiator matrices, plotting critical air temperature against speed. | 28th Jun 1939 | Box 109 \ 4 scan0117 | |
| Graph from Brooklands tests comparing the cooling performance of a Buick 30.G.VII and a 3.B.50. | 22th Jun 1939 | Box 109 \ 4 scan0118 | |
| Bar chart comparing the rate of water temperature increase during idling tests for a 30-G-VII and a Buick at Brooklands. | 22th Jun 1939 | Box 109 \ 4 scan0119 | |
| Data table from Brooklands tests comparing vehicle cooling performance under various configurations. | 28th Jun 1939 | Box 109 \ 4 scan0120 | |
| Dynamometer graph showing road wheel horsepower against engine RPM for various vehicle configurations. | 29th Jun 1939 | Box 109 \ 4 scan0121 | |
| Graph of Hub Horse Power versus Engine R.P.M. for a specific chassis and engine combination under various test conditions. | 29th Jun 1939 | Box 109 \ 4 scan0122 | |
| Graph of power comparisons for a B80 N°5 unit after 30,000 miles, plotting BHP, MEP and back pressure against RPM. | 5th Jul 1939 | Box 109 \ 4 scan0123 | |
| The failure of a 2nd Motion Shaft in a 9.B.V. Gear Box during testing. | 5th Jul 1939 | Box 109 \ 4 scan0124 | |
| Photograph of a gearbox layshaft with multiple helical gears and one bevel gear. | 5th Jul 1939 | Box 109 \ 4 scan0125 | |
| Road test report on an 8-cylinder 'Corniche' car detailing performance issues. | 5th Jul 1939 | Box 109 \ 4 scan0126 | |
| Vehicle performance feedback note discussing brakes, suspension, and gearbox issues. | 5th Jul 1939 | Box 109 \ 4 scan0127 | |
| Request to investigate the cause of bonnet knocks on car 30-G-VII and prepare necessary parts for the 'Corniche'. | 11th Jul 1939 | Box 109 \ 4 scan0128 | |
| Report outlining the objectives for the continental testing of the 8-cylinder 'Silver Phantom' and 'Corniche' models. | 11th Jul 1939 | Box 109 \ 4 scan0129 | |
| Performance test report on the 8-cylinder 'Silver Phantom' covering cooling, steering, and brakes over 2,000 miles. | 11th Jul 1939 | Box 109 \ 4 scan0130 | |
| Report page detailing performance on brakes, petrol consumption, oil consumption, and detonation. | 11th Jul 1939 | Box 109 \ 4 scan0131 | |
| Performance report on the gearbox, rear axle, suspension, tyres, and general performance of a test vehicle. | 11th Jul 1939 | Box 109 \ 4 scan0132 | |
| Vehicle performance and issues report covering speed, engine, drivetrain, steering, and bodywork. | 11th Jul 1939 | Box 109 \ 4 scan0133 | |
| Road test report detailing feedback on the body, chassis, and tyres of a prototype car. | 11th Jul 1939 | Box 109 \ 4 scan0134 | |
| Required modifications to a car's gearing, cooling, fuel tank, and bodywork following testing. | 11th Jul 1939 | Box 109 \ 4 scan0135 | |
| The handling and directional stability of the 'Corniche' car, comparing it with other models. | 11th Jul 1939 | Box 109 \ 4 scan0136 | |
| Dismantled Silver Phantom steering box with a broken lock stop, including measurements and a request for parts. | 13th Jul 1939 | Box 109 \ 4 scan0137 | |
| Broken steering box from a Silver Phantom, including measurements and proposed fixes. | 13th Jul 1939 | Box 109 \ 4 scan0138 | |
| Requesting to raise the main oil pressure and to check the oil supply to the timing gears. | 13th Jul 1939 | Box 109 \ 4 scan0139 | |
| Road report on car 30-G-VII discussing radiator shake, bonnet knocks, and engine mounting modifications. | 14th Jul 1939 | Box 109 \ 4 scan0140 | |
| Issue of 'bonnet knocks' and the solution using diagonal stays, while proposing new rubber mountings to address side shake. | 14th Jul 1939 | Box 109 \ 4 scan0141 | |
| Tyre and steering part availability for the Silver Phantom and Continental models, with a request for driving feedback. | 15th Jul 1939 | Box 109 \ 4 scan0142 | |
| Confirmation of a telegram despatched regarding a worn pushrod and requesting replacements. | 18th Jul 1939 | Box 109 \ 4 scan0143 | |
| Fixing bonnet knocks by adding a transverse mild steel strip to the radiator mount. | 18th Jul 1939 | Box 109 \ 4 scan0144 | |
| Issues with starting handle clearance, radiator location, and brake wear on the 'Silver Phantom'. | 18th Jul 1939 | Box 109 \ 4 scan0145 | |
| Technical report from Chateauroux on engine issues including oil pressure, push-rod wear, gasket shrinkage, and carburation, requesting parts. | 18th Jul 1939 | Box 109 \ 4 scan0146 | |
| Telegram requesting replacement pushrods and ballends due to a worn part on 'Robotham No. 5'. | 18th Jul 1939 | Box 109 \ 4 scan0147 | |
| Clarifying that the Silver Phantom steering box stops are for assembly convenience, not for in-service use. | 19th Jul 1939 | Box 109 \ 4 scan0148 | |
| Steering issues on the Silver Phantom model 30-G-Vll, including lock movement and linkage problems. | 18th Jul 1939 | Box 109 \ 4 scan0149 | |
| Steering component failures and potential modifications for the Silver Phantom model. | 18th Jul 1939 | Box 109 \ 4 scan0150 | |
| Oil leaks, front suspension, and remedies for bonnet knocks and radiator movement. | 20th Jul 1939 | Box 109 \ 4 scan0151 | |
| Cover note for a 6,000-mile running report on vehicle 30.G.VII, noting issues with bodywork, windscreen wipers and horns. | 20th Jul 1939 | Box 109 \ 4 scan0152 | |
| Summary of faults noted during the first 6,000 miles of running for a Silver Phantom Continental Test Car. | 18th Jul 1939 | Box 109 \ 4 scan0153 | |
| List of vehicle faults related to the transmission and brakes, detailing issues and observations. | 18th Jul 1939 | Box 109 \ 4 scan0154 | |
| Faults and proposed remedies for steering and suspension systems. | 18th Jul 1939 | Box 109 \ 4 scan0155 | |
| List of vehicle faults and proposed modifications related to frame, fittings, and controls. | 18th Jul 1939 | Box 109 \ 4 scan0156 | |
| Faults found in electrical equipment and bodywork, including rattles, loose components, and poor performance. | 18th Jul 1939 | Box 109 \ 4 scan0157 | |
| Various vehicle faults including a broken partition bracket, rear seat fire, and uneven tyre wear. | 20th Jul 1939 | Box 109 \ 4 scan0158 | |
| The despatch of a rubber block to Mr. Waller in France. | 20th Jul 1939 | Box 109 \ 4 scan0159 | |
| Sending a new harder rubber block for mounting the radiator to Chateauroux for testing. | 20th Jul 1939 | Box 109 \ 4 scan0160 | |
| Dispatch of two new pairs of jets with a different orifice coefficient to Chateauroux. | 20th Jul 1939 | Box 109 \ 4 scan0161 | |
| Letter advising a customer about a dented front frame pan due to improper jacking and recommending caution. | 21th Jul 1939 | Box 109 \ 4 scan0162 | |
| Correcting a clerical error in a previous communication concerning steering. | 21th Jul 1939 | Box 109 \ 4 scan0163 | |
| Reseating of valves on a front damper and questioning the specification for leak holes. | 22th Jul 1939 | Box 109 \ 4 scan0164 | |
| Requesting a sketch for a modified B.80 rocker cover to prevent sealing washer shrinkage. | 24th Jul 1939 | Box 109 \ 4 scan0165 | |
| Prop shafts, tyres, axles and wheels for various vehicle models. | 24th Jul 1939 | Box 109 \ 4 scan0166 | |
| Confirming a request to Dunlops to send various tyre covers and tubes to Chateauroux. | 25th Jul 1939 | Box 109 \ 4 scan0167 | |
| Failure of a radiator mounting yoke and subsequent repairs and modifications. | 25th Jul 1939 | Box 109 \ 4 scan0168 | |
| Vehicle faults including oil leaks, damper valve trouble, and a request for new brake shoes. | 25th Jul 1939 | Box 109 \ 4 scan0169 | |
| The supply and testing of various Dunlop and Avon tyres for different car models. | 25th Jul 1939 | Box 109 \ 4 scan0170 | |
| Technical memorandum regarding the leak hole and uncontrolled valve on 30.G.VII front dampers. | 26th Jul 1939 | Box 109 \ 4 scan0171 | |
| Query about whether a specific damper is standard or new, following a report about standardising hardened seats. | 27th Jul 1939 | Box 109 \ 4 scan0172 | |
| Secret memo regarding issues and performance of 30-G-VII shock dampers. | 27th Jul 1939 | Box 109 \ 4 scan0173 | |
| Request to despatch front damper parts to an address in France. | 28th Jul 1932 | Box 109 \ 4 scan0174 | |
| Investigation into the loss of load in front dampers, identifying the cause as metal pieces from the interlever. | 28th Jul 1939 | Box 109 \ 4 scan0175 | |
| Series of tests on radiator side shake and movement. | 1st Aug 1939 | Box 109 \ 4 scan0176 | |
| Risk of battery leads burning and exploring alternative routing options. | 1st Aug 1939 | Box 109 \ 4 scan0177 | |
| Issues found with front dampers, including leaks and a request for a new valve holder. | 3rd Aug 1939 | Box 109 \ 4 scan0178 | |
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