| Description | Date | Identifier | |
| The failure of rear brake squeak dampers on a 20 HP vehicle. | 24th May 1927 | Box 120 \ 1 scan0012 | |
| Oil drain modification that inadvertently caused oil spillage, and the proposal of a new scheme to rectify the issue. | 1st Jun 1927 | Box 120 \ 1 scan0013 | |
| Standardisation of an anti-brake squeaking device for the 20 HP chassis. | 31th Mar 1927 | Box 120 \ 1 scan0014 | |
| Standardisation sheet cover note regarding costs for an anti-brake squeaking device. | 19th Mar 1927 | Box 120 \ 1 scan0015 | |
| Letter discussing the adoption of aluminum rear brake dampers following successful trials on Silver Ghost and Phantom models. | 13th Aug 1927 | Box 120 \ 1 scan0016 | |
| Scheme for a brake damper, its testing, and a proposal to adapt and standardise it for the 20 HP and 40/50 HP models. | 1st Mar 1927 | Box 120 \ 1 scan0017 | |
| Letter from America to Derby regarding a brake damper, postponing changes until new rear brake drums are standardized. | 13th Sep 1927 | Box 120 \ 1 scan0018 | |
| Letter discussing improvements to Bendix brakes, proposing an experimental test for harder carbon steel brake drums. | 13th Oct 1927 | Box 120 \ 1 scan0019 | |
| Adaptation of centralised lubrication for the rear axle and modifications to shock damper and squeak damper components. | 13th Oct 1927 | Box 120 \ 1 scan0020 | |
| Unsuccessful experiment to reduce brake squeak by shrinking a steel band onto a front brake drum. | 29th Nov 1927 | Box 120 \ 1 scan0021 | |
| Tests to overcome brake squeaks on a Phantom model by making the damping sectors heavier. | 2nd Nov 1928 | Box 120 \ 1 scan0022 | |
| Issues with brake drum flexibility and proposals for increased stiffness. | 26th Nov 1930 | Box 120 \ 1 scan0023 | |
| Modifications and experiments with brake shoes to address sponginess and improve design. | 27th Nov 1930 | Box 120 \ 1 scan0024 | |
| Interpreting a wire received to halt brake drum production pending an increase in stiffness. | 27th Nov 1930 | Box 120 \ 1 scan0025 | |
| New designs for brake drums and an entirely new brake shoe system to improve performance. | 28th Nov 1930 | Box 120 \ 1 scan0026 | |
| Confirmation of a telephone message to Mr. Bailey regarding issues with brakes and specifications for new ring forgings. | 28th Nov 1930 | Box 120 \ 1 scan0027 | |
| New ribbed brake drums made from tubular forgings and the potential use of manganese steel. | 1st Dec 1930 | Box 120 \ 1 scan0028 | |
| The difficulty of using Manganese steel for brake drums and suggesting alternative materials. | 3rd Dec 1930 | Box 120 \ 1 scan0029 | |
| Suggestion to experimentally try nickel chrome cast iron for new ribbed brake drums on the Phantom. | 5th Dec 1930 | Box 120 \ 1 scan0030 | |
| Decision to increase the thickness of Rear Brake Drums for the 40-50 HP Chassis. | 6th Dec 1930 | Box 120 \ 1 scan0031 | |
| Following up on a conference agreement to fit stiffer drums and the requirement for the Experimental Department to check for flaws. | 10th Dec 1930 | Box 120 \ 1 scan0032 | |
| Improvements to brake drums and shoes for 25HP & 45HP car models. | 11th Dec 1930 | Box 120 \ 1 scan0033 | |
| Stopping production of original brake drums and experimenting with increased thickness and ribs for the 40/50 HP chassis. | 19th Dec 1930 | Box 120 \ 1 scan0034 | |
| Issues with boring out brake drums on Phantom I & II models, proposing new limits and recommending design improvements. | 12th Jan 1931 | Box 120 \ 1 scan0035 | |
| Issues and potential solutions for brake drums on the 40/50 HP chassis, including distortion and heat treatment problems. | 16th Jan 1931 | Box 120 \ 1 scan0036 | |
| Request to make a set of new ribbed drums in cast iron, suggesting two production methods. | 2nd Feb 1931 | Box 120 \ 1 scan0037 | |
| Production and fitting of rib brake drums to experimental 40/50 HP cars. | 4th Feb 1931 | Box 120 \ 1 scan0038 | |
| Costs and stock for 40/50-HP chassis brake drums. | 14th Feb 1931 | Box 120 \ 1 scan0039 | |
| High-speed braking tests and the performance of adjustable Delco shock absorbers with American springing. | 6th Mar 1931 | Box 120 \ 1 scan0040 | |
| Comparing the weights of Standard and Cast Iron front and rear brake drums. | 9th Mar 1931 | Box 120 \ 1 scan0041 | |
| Weights of ribbed brake drums, comparing standard and cast iron versions. | 14th Mar 1931 | Box 120 \ 1 scan0042 | |
| Test report on brake linings and the resulting cracks observed on cast iron brake drums. | 30th Mar 1931 | Box 120 \ 1 scan0043 | |
| Brake effectiveness and squeaking issues on Phantom II models. | 10th Apr 1931 | Box 120 \ 1 scan0044 | |
| Brake tests comparing standard brakes with ribbed cast iron and steel brake drums on Phantom II cars. | 13th Apr 1941 | Box 120 \ 1 scan0045 | |
| Complaint about black enamel paint peeling off brake-drums on demonstration cars due to heat. | 28th May 1931 | Box 120 \ 1 scan0046 | |
| Cover note forwarding a combined reply from SFT and Mx. | 6th Jun 1931 | Box 120 \ 1 scan0047 | |
| Issues with brake drum enamel burning at high temperatures and proposed solutions. | 1st Jun 1931 | Box 120 \ 1 scan0048 | |
| Testing and proposed standardisation of a new high-temperature brake drum enamel. | 17th Jul 1931 | Box 120 \ 1 scan0049 | |
| Test report from September 1931 comparing the life of Patent Brake Shoes versus Standard Rivetted Shoes. | 1st Sep 1931 | Box 120 \ 1 scan0050 | |
| Unsatisfactory wrought steel brake drums and proposals for alternative materials and designs. | 9th Nov 1931 | Box 120 \ 1 scan0051 | |
| Testing and comparison of forged steel versus cast iron brake drums. | 14th Nov 1931 | Box 120 \ 1 scan0052 | |
| Analysis of weights and dimensions for various 40/50 brake drum configurations and assemblies. | 8th Nov 1931 | Box 120 \ 1 scan0053 | |
| Relative cost of ribbed brake drums made from cast iron versus high carbon steel. | 8th Nov 1931 | Box 120 \ 1 scan0054 | |
| Success of cast iron brake drums from Lake and Elliott and the intention to order more sets. | 8th Nov 1931 | Box 120 \ 1 scan0055 | |
| Upgrades to Mr. Fairey's Phantom II, including stronger valve springs and special ribbed brake drums. | 8th Nov 1931 | Box 120 \ 1 scan0056 | |
| Correcting a previously circulated figure for the weight added to the chassis by ribbed drums. | 20th Nov 1931 | Box 120 \ 1 scan0057 | |
| Detail drawings for ribbed brake drums for the Phantom II. | 25th Nov 1931 | Box 120 \ 1 scan0058 | |
| Weight comparison of different 1-40/50 model brake drum assemblies. | 1st Nov 1931 | Box 120 \ 1 scan0059 | |
| Letter to Lake & Elliot Ltd. authorising the machining and safeguarding of brake drums. | 16th Dec 1931 | Box 120 \ 1 scan0060 | |
| Letter from Lake & Elliot Ltd. regarding a safeguarding method for Millenite Drums. | 15th Dec 1931 | Box 120 \ 1 scan0061 | |
| Page two of a letter from Lake & Elliott Ltd. detailing the results of a test on a safeguarded brake drum. | 24th Nov 1931 | Box 120 \ 1 scan0062 | |
| Weight and thickness of cast iron brake drums for the Phantom and J.3 models. | 24th Nov 1931 | Box 120 \ 1 scan0063 | |
| Patented method for reinforcing cast iron brake drums using a high tensile steel band. | 16th Dec 1931 | Box 120 \ 1 scan0064 | |
| Letter from Lake & Elliot Ltd. regarding a new safeguarding method for Millenite Brake Drums. | 15th Dec 1931 | Box 120 \ 1 scan0065 | |
| Letter from Lake & Elliott, Limited, detailing the results of a brake drum and rivetless shoe test. | 1st Jan 1932 | Box 120 \ 1 scan0066 | |
| Cost comparison between a cast iron ribbed drum and a pressed steel drum. | 1st Jan 1932 | Box 120 \ 1 scan0067 | |
| Cost comparison of various brake drum assemblies. | 3rd Dec 1931 | Box 120 \ 1 scan0068 | |
| Letter from Lake & Elliott Limited concerning cast iron brake drum castings with patent re-inforcement. | 6th Jan 1932 | Box 120 \ 1 scan0069 | |
| Letter from Lake & Elliot regarding brake drum castings with patent reinforcement. | 5th Jan 1932 | Box 120 \ 1 scan0070 | |
| Ordering of improved brake shoe material for 'T' and 'U' series chassis. | 6th Jan 1932 | Box 120 \ 1 scan0071 | |
| Clarifying the material specification for Japan III and Peregrine brake drums. | 8th Jan 1932 | Box 120 \ 1 scan0072 | |
| Technical memo discussing brake drum wear, experiments with different materials, and a recommendation for a new supplier. | 23th Feb 1932 | Box 120 \ 1 scan0073 | |
| Potential use of Lake & Elliott cast iron brake drums. | 23th Feb 1932 | Box 120 \ 1 scan0074 | |
| Laboratory report on the material examination of Lake and Elliott Cast Iron Brake Drums. | 1st Mar 1932 | Box 120 \ 1 scan0075 | |
| Lack of patents on brake drums from Lake & Elliott, proposing in-house production. | 3rd Mar 1932 | Box 120 \ 1 scan0076 | |
| The promise of cast iron brake drums, noting their benefits but also the fear of them cracking. | 7th Mar 1932 | Box 120 \ 1 scan0077 | |
| Material composition and testing of cast iron brake drums, comparing in-house production with a supplier's product. | 7th Mar 1932 | Box 120 \ 1 scan0078 | |
| Material analysis for cast iron brake drums and ordering new material for the foundry. | 8th Mar 1932 | Box 120 \ 1 scan0079 | |
| Safety factor testing of Lake & Elliott brake drums for the Phantom II. | 22th Mar 1932 | Box 120 \ 1 scan0080 | |
| Letter from The Pressed Steel Co. of Great Britain Ltd. requesting prints for a composite drum construction job. | 30th Mar 1932 | Box 120 \ 1 scan0081 | |
| Insufficient strength of auxiliary brake shoe springs and the successful test of a heavier replacement. | 1st Apr 1932 | Box 120 \ 1 scan0082 | |
| Letter to The Pressed Steel Co. of Great Britain Ltd. discussing the design and potential production of brake drums. | 2nd Apr 1932 | Box 120 \ 1 scan0083 | |
| Letter to The Pressed Steel Co. regarding a discussion about brake drums with the Budd Manufacturing Co. in Detroit. | 4th Apr 1932 | Box 120 \ 1 scan0084 | |
| Letter to the Chief Engineer of The Budd Manufacturing Co. requesting an opinion on how to centrifugally cast a small brake drum. | 4th Apr 1932 | Box 120 \ 1 scan0085 | |
| Brake drum distortion tests with ribbed and plain drums. | 6th Jun 1932 | Box 120 \ 1 scan0086 | |
| Standardisation and destructive testing of cast iron brake drums for car 22-EX. | 21th Jun 1932 | Box 120 \ 1 scan0087 | |
| The material composition and testing of special brake drums, advising against further casting. | 5th Jul 1932 | Box 120 \ 1 scan0088 | |
| Merits and proposed testing of rivetless brake lining attachment to improve brake life. | 1st Jul 1932 | Box 120 \ 1 scan0089 | |
| Test report comparing the life of Patent Brake Shoes against Standard Rivetted Shoes. | 1st Sep 1931 | Box 120 \ 1 scan0090 | |
| Despatch of two brake shoes to Sir Henry Royce for examination. | 1st Jul 1932 | Box 120 \ 1 scan0091 | |
| Meeting and the production of patterns for Millenite Brake Drums. | 12th Jul 1932 | Box 120 \ 1 scan0092 | |
| Worn specimen of DON.B.S.2 brake shoe material from a Lake and Elliott shoe. | 16th Jul 1922 | Box 120 \ 1 scan0093 | |
| Letter to Bendix-Perrot Brakes Ltd requesting a sample and production cost for a pressed steel brake shoe. | 25th Jul 1932 | Box 120 \ 1 scan0094 | |
| Brake strap material, discussing issues with rear brake shoes on the 20/25 model and potential improvements. | 29th Jul 1932 | Box 120 \ 1 scan0095 | |
| Comparative test report on 25 HP rear brakes, evaluating cast iron versus aluminium brake straps. | 21th Jul 1932 | Box 120 \ 1 scan0096 | |
| Test report on brake performance comparing aluminum and cast iron straps, clearances, and brake drum types. | 21th Jul 1932 | Box 120 \ 1 scan0097 | |
| Graph comparing lost brake pedal movement for aluminium versus cast iron brake shoes during repeated applications. | 9th Aug 1932 | Box 120 \ 1 scan0098 | |
| Sending Bendix brake parts for examination and the ongoing search for a rigid pressed steel brake shoe. | 9th Aug 1932 | Box 120 \ 1 scan0099 | |
| Letter to Bendix-Perrot Brakes Ltd. concerning model brake shoes and clutch control plungers. | 9th Aug 1932 | Box 120 \ 1 scan0100 | |
| Inquiry to Messrs. Lake & Elliott regarding the supply of pressed steel brake shoes. | 9th Aug 1932 | Box 120 \ 1 scan0101 | |
| Letter from Lake & Elliot Ltd. regarding the supply of cast brake shoes instead of pressed steel ones. | 12th Aug 1932 | Box 120 \ 1 scan0102 | |
| The disadvantages of pressed steel brake shoes following a visit to Lockheed. | 17th Sep 1932 | Box 120 \ 1 scan0103 | |
| Proposal for pressed steel brake shoes. | 20th Sep 1932 | Box 120 \ 1 scan0104 | |
| Standardisation of Lake & Elliott cast iron drums to improve braking. | 9th Jun 1932 | Box 120 \ 1 scan0105 | |
| Brake drum scoring issues on a customer's car, referencing improvements with cast iron drums and comparing with Bentley's findings. | 26th Sep 1932 | Box 120 \ 1 scan0106 | |
| Hardness and composition of cast iron brake drums supplied by Lake & Elliott. | 24th Oct 1932 | Box 120 \ 1 scan0107 | |
| Technical note on a scheme to use wider brake shoes on P.2 and 25HP models. | 6th Dec 1932 | Box 120 \ 1 scan0108 | |
| Reversion from ribbed cast iron brake drums to pressed steel drums for the 25 HP model to resolve brake shudder issues. | 9th Dec 1932 | Box 120 \ 1 scan0109 | |
| The change of material for Peregrine brakes from Duralumin and Aluminium to mild steel. | 14th Dec 1932 | Box 120 \ 1 scan0110 | |
| The fitting of front axle control to 20/25 cars and querying the reason for stiffening a component. | 17th Dec 1932 | Box 120 \ 1 scan0111 | |
| | | | |
