| Description | Date | Identifier | |
| Results of testing Ferodo brake linings, detailing issues with overheating and noise. | 21th Jul 1914 | Box 26 \ 4 Scan018 | |
| Brake performance, comparing 'ferodo' linings with cast iron, and proposing improvements for overheating issues. | 21th Jul 1914 | Box 26 \ 4 Scan019 | |
| Preference for Ferodo brake liners over cast iron liners. | 21th Jul 1914 | Box 26 \ 4 Scan020 | |
| Quality of a sample of Ferodo brake material, with a handwritten reply. | 22th Jul 1914 | Box 26 \ 4 Scan021 | |
| Issues and proposed tests for foot brakes, comparing ferodo and cast iron liners. | 22th Jul 1914 | Box 26 \ 4 Scan022 | |
| Testing procedures and potential improvements for foot brakes, including water-cooling and Ferodo liners. | 2nd Jul 1914 | Box 26 \ 4 Scan023 | |
| Query regarding the suitability of 16 received Ferodo brake liners for standard brakes. | 23th Jul 1914 | Box 26 \ 4 Scan024 | |
| Quality of Ferodo Brake Liners for experiments and future orders. | 23th Jul 1914 | Box 26 \ 4 Scan025 | |
| Design of foot brakes, specifically regarding Ferodo liners, surface area, and cooling. | 24th Jul 1914 | Box 26 \ 4 Scan026 | |
| Notes on rear brakes with air-cooled drums and die-pressed Ferodo liners for chassis 7.CA. | 25th Jul 1914 | Box 26 \ 4 Scan027 | |
| Telegram received by telephone concerning the preparation of trial cars with ferodo liners. | 25th Jul 1914 | Box 26 \ 4 Scan028 | |
| Telegram received by telephone from Royce with instructions to prepare duplicates and send suggestions by post. | 26th May 1914 | Box 26 \ 4 Scan029 | |
| Correspondence discussing foot brake tests, specifically addressing distortion caused by overheating when using different brake liners. | 27th Jul 1914 | Box 26 \ 4 Scan030 | |
| Internal instruction sheet requesting the urgent dispatch of air-cooled drums and an equalizing gear lever. | 28th Jul 1914 | Box 26 \ 4 Scan031 | |
| Experiments on double rear brakes, focusing on brake drums with cooling ribs. | 31th Jul 1914 | Box 26 \ 4 Scan032 | |
| Instructions to test C.I. (Cast Iron) and Ferodo materials for straps, prioritizing the Ferodo test. | 31th Jul 1914 | Box 26 \ 4 Scan033 | |
| Urgent memo extract from Mr. Royce on the comparative testing of new air-cooled drums with Ferodo liners. | 11th Aug 1914 | Box 26 \ 4 Scan034 | |
| Test of a special footbrake with Ferodo liners, which performed well initially but failed under a simulated rough use Alpine Pass test. | 12th Aug 1914 | Box 26 \ 4 Scan035 | |
| Customer dissatisfaction with brakes and the proposal for wider brake drums as a solution. | 1st Jul 1914 | Box 26 \ 4 Scan036 | |
| The failure of Ferodo brakes under severe use and the recommendation to delay implementation. | 13th Aug 1914 | Box 26 \ 4 Scan037 | |
| Delaying new brake production pending the results of experiments on wider brake drums. | 14th Aug 1914 | Box 26 \ 4 Scan038 | |
| Series of tests to determine the power absorption of various rear wheel foot brakes. | 14th Aug 1914 | Box 26 \ 4 Scan039 | |
| Four brake tests, measuring performance and energy absorption due to brake drum expansion. | 14th Aug 1914 | Box 26 \ 4 Scan040 | |
| Brake system tests, evaluating heat expansion and the performance of Ferodo brake material. | 14th Aug 1914 | Box 26 \ 4 Scan041 | |
| The performance of Ferodo brake liners and ribbed brake drums under test conditions. | 14th Aug 1914 | Box 26 \ 4 Scan042 | |
| Cover letter for a report by Mr Haldenby regarding Ferodo brakes. | 14th Aug 1914 | Box 26 \ 4 Scan043 | |
| Instructions for making a set of brake straps using Ferodo liners for a wide drum foot brake. | 17th Aug 1914 | Box 26 \ 4 Scan044 | |
| Tests conducted on rear wheel foot brakes, noting issues with heat, expansion, and permanent distortion. | 17th Aug 1914 | Box 26 \ 4 Scan045 | |
| Results of brake strap testing and comparing cast iron liners with Ferodo liners. | 17th Aug 1914 | Box 26 \ 4 Scan046 | |
| Stationary brake tests and the performance of different heat insulating fabrics like Raybestos and Ferodo. | 18th Sep 1914 | Box 26 \ 4 Scan047 | |
| Supply issues with Ferodo brake drums and the impracticality of modifying cars being sent to the Front. | 18th Sep 1914 | Box 26 \ 4 Scan048 | |
| Instruction sheet with a dimensional drawing for the manufacture of 3 gross of aluminium rivets. | 19th Aug 1914 | Box 26 \ 4 Scan049 | |
| Note about parts fitted to the rear brakes on chassis 7 C.A., specifically die-pressed Ferodo liners. | 19th Nov 1914 | Box 26 \ 4 Scan050 | |
| Instructions for rear brake modifications on Chassis 2300. | 19th Nov 1914 | Box 26 \ 4 Scan051 | |
| Report from Caswell regarding the lining of old type central footbrakes with 'Ferodo'. | 2nd Dec 1914 | Box 26 \ 4 Scan052 | |
| Workshop activity, the use of 'Ferodo' brake linings, and radiator covers for cold weather. | 17th Nov 1914 | Box 26 \ 4 Scan053 | |
| Car accident, an outstanding order for steering levers, and the arrival of a chassis for service. | 9th Nov 1914 | Box 26 \ 4 Scan054 | |
| Communicating a note from Mr. Royce expressing frustration over delays in fitting Ferodo Type Brakes. | 17th Nov 1914 | Box 26 \ 4 Scan055 | |
| Instructions and progress notes regarding the alteration and fitting of later type rear brake drums and straps. | 21th Dec 1914 | Box 26 \ 4 Scan056 | |
| Delays in altering Ferodo type brakes due to material shortages caused by war demand. | 22th Dec 1914 | Box 26 \ 4 Scan057 | |
| Performance of 'Raybestos' brake linings and seeking an opinion on fitting them to customer cars. | 1st Mar 1915 | Box 26 \ 4 Scan058 | |
| The performance of 'Ferodo' lined rear foot brakes on chassis No 36.AB. | 4th Mar 1915 | Box 26 \ 4 Scan059 | |
| Relining of central brakes with Raybestos or Ferodo and providing instructions for brake usage. | 17th Mar 1915 | Box 26 \ 4 Scan060 | |
| On brake drum overheating with Ferodo liners and the recommended solution for 2700 series cars. | 17th Mar 1915 | Box 26 \ 4 Scan061 | |
| Instructions regarding the fitting of Ferodo lined brakes with air-cooled drums to customer cars. | 29th Jun 1916 | Box 26 \ 4 Scan062 | |
| Extract of a memo regarding progress on an experimental chassis, specifically the Ferodo-lined brakes. | 29th Jun 1916 | Box 26 \ 4 Scan063 | |
| Extract proposing the use of Ferodo lining for the side brakes on standard cars. | 18th Aug 1916 | Box 26 \ 4 Scan064 | |
| Request for data on the behaviour of oily Ferodo brake and clutch linings for an epicyclic change speed mechanism. | 8th Nov 1918 | Box 26 \ 4 Scan065 | |
| Performance of Ferodo material versus cotton fabric for brakes and clutches, particularly when exposed to oil. | 11th Nov 1918 | Box 26 \ 4 Scan066 | |
| Requesting an order for 6 sets of experimental Ferodo brake shoe material from Messrs. Herbert Frood. | 21th Mar 1919 | Box 26 \ 4 Scan067 | |
| Request to order six sets of non-wire, die-pressed Ferodo brake linings for the 40/50 HP chassis. | 28th Mar 1919 | Box 26 \ 4 Scan068 | |
| Copy of a letter from Herbert Frood, Ltd. regarding an order for brake lining material and a delivery estimate. | 2nd May 1919 | Box 26 \ 4 Scan069 | |
| Attached letter from Herbert Frood Co. about Ferodo Brake Linings. | 5th May 1919 | Box 26 \ 4 Scan070 | |
| Tests conducted on the brakes of a 'Buick' car, model X.3317. | 9th May 1919 | Box 26 \ 4 Scan071 | |
| Brake testing where sustained use caused overheating and the burning of wooden wheel spokes. | 9th May 1919 | Box 26 \ 4 Scan072 | |
| The testing of a special hot-pressed Ferodo brake material for rear brakes. | 18th Sep 1919 | Box 26 \ 4 Scan073 | |
| Testing of special Ferodo material for the 40/50 rear brake. | 19th Sep 1919 | Box 26 \ 4 Scan074 | |
| The fitting of various experimental parts to chassis 1.EX and 2.EX. | 10th Dec 1919 | Box 26 \ 4 Scan075 | |
| Extract listing new parts fitted to a car for a 10,000-mile run. | 10th Dec 1919 | Box 26 \ 4 Scan076 | |
| Testing a special compressed Ferodo No.9 brake material for the chassis rear hub. | 8th Jan 1920 | Box 26 \ 4 Scan077 | |
| Letter from The Herbert Frood Company regarding the performance and testing of new non-wire asbestos brake linings. | 8th Jan 1920 | Box 26 \ 4 Scan078 | |
| Letter from The Herbert Frood Co. Ltd regarding the supply of material for brakes and clutches. | 6th Aug 1919 | Box 26 \ 4 Scan079 | |
| Production issues with drilling No. 9 Ferodo brake material for the rear hub and brake. | 26th Jan 1920 | Box 26 \ 4 Scan080 | |
| The use of No.9 Ferodo brake material on an EX chassis undergoing a 10,000-mile test. | 27th Jan 1920 | Box 26 \ 4 Scan081 | |
| Letter discussing pricing and testing of Ferodo brake liners. | 2nd Feb 1920 | Box 26 \ 4 Scan082 | |
| The testing of five samples of American brake linings. | 12th Mar 1920 | Box 26 \ 4 Scan083 | |
| Forwarding five samples of American-made brake lining material for testing and evaluation. | 20th Jan 1920 | Box 26 \ 4 Scan084 | |
| Forwarding four American Bosch Magnetos, types BC and ZR6, with blueprints for a performance report. | 2nd Feb 1920 | Box 26 \ 4 Scan085 | |
| Squeaking Ferodo lined footbrakes and the correct installation of rivets. | 15th Mar 1920 | Box 26 \ 4 Scan086 | |
| The cause and cure of squeaking in Ferodo lined foot brakes. | 12th Mar 1920 | Box 26 \ 4 Scan087 | |
| Results of heat testing on different types of brake linings. | 16th Mar 1920 | Box 26 \ 4 Scan088 | |
| Requesting comments on an attached report regarding squeaking from Ferodo-lined footbrakes. | 24th Mar 1920 | Box 26 \ 4 Scan089 | |
| Unsatisfactory brakes, including issues with rivets, squeaking, and material performance. | 29th Mar 1920 | Box 26 \ 4 Scan090 | |
| Following up on a request for comments regarding squeaking from Ferodo lined footbrakes. | 14th Apr 1920 | Box 26 \ 4 Scan091 | |
| Confirming Mr. Frood will supply pressed unwoven asbestos material for brake shoes and aluminium rivets. | 7th May 1920 | Box 26 \ 4 Scan092 | |
| Letter from Ferodo Limited regarding the supply and testing of various clutch materials. | 6th May 1920 | Box 26 \ 4 Scan093 | |
| Letter from Ferodo Limited concerning the supply and adjustment of foot brake shoes and linings. | 17th Feb 1920 | Box 26 \ 4 Scan094 | |
| Follow-up letter regarding the testing of American brake linings and magnetos. | 20th Apr 1920 | Box 26 \ 4 Scan095 | |
| Requesting a completion date for tests on American brake linings and Bosch magnetos. | 28th Apr 1920 | Box 26 \ 4 Scan096 | |
| Dynamometer test report on American brake lining samples fitted to rear brakes. | 3rd May 1920 | Box 26 \ 4 Scan097 | |
| Supply of foot brake shoes to Ferodo Ltd for fitting special 9M material facings. | 18th May 1920 | Box 26 \ 4 Scan098 | |
| Letter from Ferodo Limited discussing a manufacturing suggestion for a material combining asbestos, graphite, and brass wire. | 17th Jun 1920 | Box 26 \ 4 Scan099 | |
| Sourcing of various car parts for the American market. | 7th Jun 1920 | Box 26 \ 4 Scan100 | |
| Parts proposed to be sent to America, with objections to fitting certain components. | 7th Jun 1920 | Box 26 \ 4 Scan101 | |
| Letter to Mr. Bailey regarding the procurement status of various parts including lubricators, plates, and steering wheels. | 7th Jun 1920 | Box 26 \ 4 Scan102 | |
| Sourcing and manufacturing decisions for brake linings, radiators, and ball bearings. | 7th Jun 1920 | Box 26 \ 4 Scan103 | |
| Chasing up the test results for American Brake Linings and Magnetos. | 20th Apr 1921 | Box 26 \ 4 Scan104 | |
| Extract discussing issues with clutch over-oiling due to badly fitted lubrication valves and slack worsteds. | 1st Jun 1921 | Box 26 \ 4 Scan105 | |
| Letter from Ferodo Limited discussing the performance of their No. 9 brake liners after a 10,000-mile test. | 5th Jul 1920 | Box 26 \ 4 Scan106 | |
| Test report on a slipping starter clutch, detailing issues, corrections, and performance results with different materials. | 20th Jul 1920 | Box 26 \ 4 Scan107 | |
| Concerning a delay in measuring brake liners for Mr. Frood as the required car is unavailable. | 24th Jul 1920 | Box 26 \ 4 Scan108 | |
| Requesting information on experiments to fix squeaky Ferodo lined brakes following several customer complaints. | 13th Aug 1920 | Box 26 \ 4 Scan109 | |
| Adoption of new clutches and issues with Ferodo and Raybestos friction materials. | 24th Jan 1921 | Box 26 \ 4 Scan110 | |
| Cover letter regarding the receipt of experimental clutch linings from Ferodo Limited. | 23th Mar 1921 | Box 26 \ 4 Scan111 | |
| Copy of a letter from Ferodo Limited concerning experimental clutch linings sent to Rolls-Royce. | 18th Mar 1921 | Box 26 \ 4 Scan112 | |
| Letter from Ferodo Limited about experimental clutch linings. | 31th Mar 1921 | Box 26 \ 4 Scan113 | |
| The receipt of Ferobestos Brake Liners and their availability from the Stores. | 9th Jun 1921 | Box 26 \ 4 Scan114 | |
| The fitting of Ferobestos brake linings G.4574 to chassis. | 10th Jun 1921 | Box 26 \ 4 Scan115 | |
| Request to supply an undrilled and rough-surfaced Cone Clutch for testing a new non-metallic clutch ring from Scandinavia Belting Co. | 6th Jul 1921 | Box 26 \ 4 Scan116 | |
| New fabric for Goshawk 11 friction clutches from Scandinavia Belting Co. | 7th Jul 1921 | Box 26 \ 4 Scan117 | |
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