| Description | Date | Identifier | |
| Proposal for modifications to flip flap shutters on the rivetless bonnet for model 22-EX. | 19th Oct 1931 | Box 12 \ 7 07-page191 | |
| Adjustments to the radius and gap of bonnet shutters for series cars. | 26th Oct 1931 | Box 12 \ 7 07-page192 | |
| Standardisation of pivoted flip-flap type ventilators for the chassis. | 8th Jul 1931 | Box 12 \ 7 07-page193 | |
| Standardisation form for a new chassis part, detailing fitting, costs, and approval remarks. | 12th Jul 1921 | Box 12 \ 7 07-page194 | |
| Complaints regarding Phantom II bonnet locks, comparing the existing Vaughan lock with a previously designed bar type lock. | 26th Nov 1931 | Box 12 \ 7 07-page195 | |
| Proposal to replace the standard Yale bonnet locks with an R's Bar type lock on the 40/50 HP chassis. | 9th Dec 1931 | Box 12 \ 7 07-page196 | |
| Request for a report on schemes tested for steadying the side wheel carrier on P.2. and 25HP models. | 10th Dec 1931 | Box 12 \ 7 07-page197 | |
| Design proposal and discussion for a longer bonnet for the P2 model. | 12th Dec 1931 | Box 12 \ 7 07-page198 | |
| Standardising bonnets and modifying side wheel carriers for P.2 and 25 HP models. | 21th Dec 1931 | Box 12 \ 7 07-page199 | |
| Standardisation of longer bonnets on two car models, contingent on the success of N.Sch.3399. | 21th Dec 1931 | Box 12 \ 7 07-page200 | |
| Fitting of a longer, overhanging, rivetless bonnet to car 19-EX for a 10,000-mile test. | 21th Dec 1931 | Box 12 \ 7 07-page201 | |
| Material suitability for bonnets on the 40/50 HP Chassis - N.2. Series. | 12th Jan 1932 | Box 12 \ 7 07-page202 | |
| Choice between new bar type bonnet locks and existing Yale locks for the 40/50 HP chassis. | 15th Jan 1932 | Box 12 \ 7 07-page203 | |
| Suitability, cost, and issues with different types of bonnet locks. | 19th Jan 1932 | Box 12 \ 7 07-page204 | |
| The delayed introduction and testing of rivetless bonnets for the 40/50 model. | 8th Feb 1932 | Box 12 \ 7 07-page205 | |
| Proposal to adopt rivetless bonnets for Phantom II cars. | 20th Feb 1932 | Box 12 \ 7 07-page206 | |
| The fit of an overhanging bonnet for 20/25 HP and Phantom II models, discussing stress issues, its replacement, and a dispute over charges. | 18th Mar 1932 | Box 12 \ 7 07-page207 | |
| The provision of a stiffener for the rivetless bonnet on the Phantom II model. | 19th Mar 1932 | Box 12 \ 7 07-page208 | |
| The comparative costs of a standard Phantom II bonnet and a new rivetless bonnet. | 21th Mar 1932 | Box 12 \ 7 07-page209 | |
| Inquiry about the standardized 6-inch longer bonnet being unsuitable for 'C' steering and proposing a 4-inch longer version. | 15th Oct 1932 | Box 12 \ 7 07-page210 | |
| Proposal to standardise 2-inch shorter bonnets for the Phantom II chassis with 'C' type steering. | 3rd Oct 1932 | Box 12 \ 7 07-page211 | |
| Confirming the decision to maintain the existing bonnet length for Phantom II models. | 21th Oct 1932 | Box 12 \ 7 07-page212 | |
| Difficulties and potential compromises of lengthening bonnets on the 40/50 HP chassis. | 7th Nov 1932 | Box 12 \ 7 07-page213 | |
| Supply and manufacture of longer bonnets for the 40/50 HP model. | 9th Nov 1932 | Box 12 \ 7 07-page214 | |
| Modifications to car bonnets, specifically the removal of contact pieces and the lengthening of the bonnet support. | 22th Nov 1932 | Box 12 \ 7 07-page215 | |
| Log sheet for brake tests conducted on experimental vehicle 25-EX, detailing settings and performance over multiple days. | 8th Jan 1932 | Box 13 \ 1 01-page01 | |
| Brake and foot pedal adjustments, with before and after measurements, and noting a noise. | 12th Jan 1932 | Box 13 \ 1 01-page02 | |
| Brake test results for chassis 25-EX, detailing setup, stopping distances, and mileage over several days. | 21th Jan 1932 | Box 13 \ 1 01-page03 | |
| Automatic brake adjustment for an epicyclic 3rd speed gearbox, suggesting a material change from cotton duck to Ferodo. | 13th Jan 1932 | Box 13 \ 1 01-page04 | |
| The wear of different brake lining materials in a P.2 gearbox with an epicyclic third gear. | 19th Jan 1932 | Box 13 \ 1 01-page05 | |
| Modifications and suggestions for the Epicyclic 3rd Speed Box. | 29th Jan 1932 | Box 13 \ 1 01-page06 | |
| Technical memo about creating an inspection hole for the brake lever and a scheme for a gear pre-selection valve. | 26th Feb 1932 | Box 13 \ 1 01-page07 | |
| Design of a hydraulic control system for an epicyclic change gear with friction brakes. | 26th Feb 1932 | Box 13 \ 1 01-page08 | |
| Merits and drawbacks of synchromesh versus epicyclic gear systems. | 25th Feb 1932 | Box 13 \ 1 01-page09 | |
| Discussion of various schemes for gearboxes, brakes, and control systems, including epicyclic gears and fluid flywheels. | 2nd Mar 1932 | Box 13 \ 1 01-page10 | |
| Effectiveness of front-wheel braking and comparing performance with Talbot cars. | 2nd Mar 1932 | Box 13 \ 1 01-page11 | |
| Criticisms of the braking proportions and performance compared to other cars like Talbot. | 2nd Mar 1932 | Box 13 \ 1 01-page12 | |
| Brake performance, front wheel braking proportions, and comparisons with other cars. | 4th Mar 1932 | Box 13 \ 1 01-page13 | |
| Rear brake shoe material for the 20/25 model, addressing rubbing issues and proposing pressed steel shoes. | 29th Jul 1932 | Box 13 \ 1 01-page14 | |
| Comparative test report on 25 HP brakes, comparing cast iron and aluminium brake straps following complaints of seizing. | 21th Jul 1932 | Box 13 \ 1 01-page15 | |
| Brake testing, comparing aluminum and cast iron straps and different drum types. | 21th Jul 1932 | Box 13 \ 1 01-page16 | |
| Graph comparing the loss of pedal movement due to brake shoe heating for standard aluminum versus cast iron shoes on a 20/25 model. | 9th Jun 1932 | Box 13 \ 1 01-page17 | |
| Standardisation document for Lake & Elliott cast iron drums. | 9th Jun 1932 | Box 13 \ 1 01-page18 | |
| Form for the standardization of chassis parts, detailing implementation and costs. | 14th Sep 1932 | Box 13 \ 1 01-page19 | |
| Solution for 'brake thumps' by coupling the brakes together. | 14th Sep 1932 | Box 13 \ 1 01-page20 | |
| Issues with front brake drums after 16,000 miles, including scoring and alternative fixing methods. | 28th Sep 1932 | Box 13 \ 1 01-page21 | |
| On testing the efficiency of Phantom Brakes and their equalizing shafts. | 12th Oct 1932 | Box 13 \ 1 01-page22 | |
| Load and pressure particulars for the 'Phantom' model braking system. | 14th Oct 1932 | Box 13 \ 1 01-page23 | |
| The pressure and pull specifications for the Phantom braking system. | 14th Oct 1932 | Box 13 \ 1 01-page24 | |
| Notification regarding the modification for increased front braking by lengthening the central lever of the equaliser shaft. | 14th Oct 1932 | Box 13 \ 1 01-page25 | |
| Standardisation of a stronger spring under the auxiliary shoe of rear brakes. | 12th Aug 1932 | Box 13 \ 1 01-page26 | |
| Standardisation of chassis parts, detailing the test date and costs for a new part. | 15th Oct 1932 | Box 13 \ 1 01-page27 | |
| Increasing the braking proportion on the front wheels of the 40/50 and 20/25 models. | 8th Nov 1932 | Box 13 \ 1 01-page28 | |
| Increase in the percentage of front braking for the 58-GY model. | 9th Nov 1932 | Box 13 \ 1 01-page29 | |
| Comparison of braking units for the J.III & Peregrine models against the 40/50 & 20/25, with proposed modifications. | 11th Nov 1932 | Box 13 \ 1 01-page30 | |
| Typed note regarding brake adjustment for the 20/25 model. | 3rd Oct 1932 | Box 13 \ 1 01-page31 | |
| Standardisation of chassis parts to increase the percentage of braking on the front axle from 40% to 45%. | 3rd Oct 1932 | Box 13 \ 1 01-page32 | |
| Standardisation form for chassis parts detailing implementation and associated costs. | 19th Feb 1933 | Box 13 \ 1 01-page33 | |
| Preference for hydraulic transmission with direct braking over a servo system due to complexity. | 12th Dec 1932 | Box 13 \ 1 01-page34 | |
| Design of wider brake drums with steel shoes for the Phantom II model. | 24th Dec 1932 | Box 13 \ 1 01-page35 | |
| Trial modifications to the Phantom II front sheet steel brake shoes. | 4th Aug 1933 | Box 13 \ 1 01-page36 | |
| Customer's request for a second battery and modifications to the front wheel braking system. | 25th Oct 1933 | Box 13 \ 1 01-page37 | |
| Application of self-aligning bearings to the rear brake equaliser shafts for the Phantom 10,000 miles car. | 3rd Jan 1934 | Box 13 \ 1 01-page38 | |
| Modification to the P.2 brake adjustment to protect the locking teeth. | 2nd Jan 1934 | Box 13 \ 1 01-page39 | |
| Modifications to welded sheet steel front brake shoes to allow for the use of bifurcated rivets. | 19th Jan 1934 | Box 13 \ 1 01-page40 | |
| Infrequent oil leaks on Phantom II front brakes, attributing the cause to bad fitting rather than a design fault. | 20th Jan 1934 | Box 13 \ 1 01-page41 | |
| Oil leaks under the front brakes of a Phantom II, referencing a similar issue on Bentley cars. | 12th Jan 1934 | Box 13 \ 1 01-page42 | |
| Oil leaks on the front brakes of a Phantom II. | 30th Jan 1934 | Box 13 \ 1 01-page43 | |
| Letter to Bowden Engineers Ltd. requesting samples of large inner and outer cables for front brakes. | 26th Feb 1934 | Box 13 \ 1 01-page44 | |
| Letter to Bowden (Engineers) Ltd. discussing the fitting of their cable system to a car. | 22th Mar 1934 | Box 13 \ 1 01-page45 | |
| Phantom II easy brake adjustments, specifically the wing nut lift and shoe centre clearances. | 28th Mar 1934 | Box 13 \ 1 01-page46 | |
| Letter to Bowden (Engineers) Ltd. providing measurements, returning a print, and enclosing another print for a grease gun nipple. | 11th Apr 1934 | Box 13 \ 1 01-page47 | |
| Correct wing nut lift specifications for brake adjustments on various chassis models. | 4th May 1934 | Box 13 \ 1 01-page48 | |
| Technical explanation of the causes of front brake thumping when using a servo system. | 16th May 1934 | Box 13 \ 1 01-page49 | |
| Overcoming faults in braking systems and introducing a new servo-assisted scheme EX.13184. | 16th May 1934 | Box 13 \ 1 01-page50 | |
| Standardisation of brake equaliser shafts with spherical bearings. | 28th May 1934 | Box 13 \ 1 01-page51 | |
| Cost estimate and production note for extra jigs, tools and equipment for the 'T' series chassis. | 16th May 1934 | Box 13 \ 1 01-page52 | |
| Standardisation of parts for the bifurcated rivetting of brake linings to reduce cost. | 10th May 1934 | Box 13 \ 1 01-page53 | |
| Estimation of costs for extra jigs, tools, and equipment for the 'T' series chassis. | 16th May 1934 | Box 13 \ 1 01-page54 | |
| Standardisation of parts form for an easy brake adjustment. | 23th Apr 1934 | Box 13 \ 1 01-page55 | |
| Cost estimate for extra jigs, tools and equipment for a modification to the 'T' series. | 23th May 1934 | Box 13 \ 1 01-page56 | |
| Brake ropes hitting undersheets, causing clatter, and proposing the development of a new rubber covering. | 30th Jul 1934 | Box 13 \ 1 01-page57 | |
| Request for braking distance figures for a 40/50 HP chassis following an owner's accident. | 5th Sep 1934 | Box 13 \ 1 01-page58 | |
| Trouble with front brake cams fouling toggles during a 10,000-mile test for the Phantom model. | 24th Sep 1934 | Box 13 \ 1 01-page59 | |
| The Phantom Easy Brake Adjustment, regarding an issue with front brake cams and parts ready for inspection. | 16th Oct 1934 | Box 13 \ 1 01-page60 | |
| Concerns about wear on a 28-EX rear drum and seeking opinions from Ferodos and Messrs. Lake & Elliot. | 1st Nov 1934 | Box 13 \ 1 01-page61 | |
| Letter to Ferodo Limited regarding a chemist's report and photomicrographs of problematic and well-performing brake drums. | 1st Nov 1934 | Box 13 \ 1 01-page62 | |
| The examination of a 28-EX Rear Axle after 25,000 miles. | 19th Oct 1934 | Box 13 \ 1 01-page63 | |
| Laboratory report on the analysis of a badly worn brake drum, attributing wear to the increased size of graphite flakes. | 19th Oct 1934 | Box 13 \ 1 01-page64 | |
| Three types of wing nut cams for the easy adjustment of brakes on Phantom II, 20/25HP, and Bentley models. | 5th Nov 1934 | Box 13 \ 1 01-page65 | |
| Recommendation regarding the importance of correct brake clearances and making the job more foolproof. | 5th Nov 1934 | Box 13 \ 1 01-page66 | |
| The mechanical efficiency of brake system components. | 21th Dec 1934 | Box 13 \ 1 01-page67 | |
| Technical analysis of the mechanical efficiency and issues within the brake systems of Phantom and Spectre models. | 21th Dec 1934 | Box 13 \ 1 01-page68 | |
| Report analyzing the efficiency of various mechanical components, such as toggles and Bowden cables, to diagnose performance loss. | 21th Dec 1934 | Box 13 \ 1 01-page69 | |
| Analysis of the efficiency and friction coefficients for a torsion shaft, pin joint, and lever. | 21th Dec 1934 | Box 13 \ 1 01-page70 | |
| Graph plotting the efficiency and deflection of brake toggles for a Bentley vehicle. | 21th Dec 1934 | Box 13 \ 1 01-page71 | |
| Blueprint graph and table showing the efficiency of a well-oiled Bowden cable under various angles and loads. | 21th Dec 1934 | Box 13 \ 1 01-page72 | |
| Graph showing the efficiency curves for one and six 20-25 HP back axle brake levers against input load. | 21th Dec 1934 | Box 13 \ 1 01-page73 | |
| Graph plotting the efficiency and deflection of a pin-jointed octagon against input load in pounds. | 21th Dec 1934 | Box 13 \ 1 01-page74 | |
| Graphs showing the efficiency of a Bowden cable against angle at various loads. | 21th Dec 1934 | Box 13 \ 1 01-page75 | |
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