| Description | Date | Identifier | |
| Letter from Willys-Overland to Katalite Corporation regarding urgent testing of coated cylinder heads to eliminate engine detonation. | 12th Apr 1924 | Box 74 \ 3 scan0381 | |
| Trial of Katalite on a Buick, enquiring about fuel types and depot locations. | 11th Jul 1924 | Box 74 \ 3 scan0382 | |
| Testing of a new petrol-proof enamel called 'Peprenel'. | 22th May 1918 | Box 74 \ 4 scan0001 | |
| Two enamel samples for carburetters and engines sent for experimentation. | 5th Jun 1917 | Box 74 \ 4 scan0002 | |
| Request to the Experimental Department to test two different enamel samples for use on carburettors and engines. | 5th Jun 1917 | Box 74 \ 4 scan0003 | |
| Specifying the stoving temperature for petrol-resisting enamel on carburettors and engines. | 12th Jun 1917 | Box 74 \ 4 scan0004 | |
| Stoving temperature for enamels used on carburetter bodies and engines. | 12th Jun 1917 | Box 74 \ 4 scan0005 | |
| On experimental petrol and oil resisting enamels, requesting more of the satisfactory oil-resisting version. | 31th Aug 1917 | Box 74 \ 4 scan0006 | |
| Report on petrol resisting enamels for carburettors and engines, with a handwritten reply. | 29th Aug 1917 | Box 74 \ 4 scan0007 | |
| The trial of petrol and oil resisting enamels on a float chamber casting. | 25th Aug 1917 | Box 74 \ 4 scan0008 | |
| Notification regarding the receipt of one gallon of Castor Oil Resisting Enamel. | 19th Sep 1917 | Box 74 \ 4 scan0009 | |
| Sending a sample tin of petrol proof enamel to the Experimental Department for testing. | 29th Oct 1917 | Box 74 \ 4 scan0010 | |
| Sample of air-drying petrol proof enamel from supplier Challoner & Co. Ltd. | 7th Nov 1917 | Box 74 \ 4 scan0011 | |
| Inquiry into the petrol-resistant enamel used in Hobson's H.C.7 Carburetters. | 9th Nov 1917 | Box 74 \ 4 scan0012 | |
| Proposal to treat carburettor corrosion by using a coating of copal varnish. | 11th Jun 1918 | Box 74 \ 4 scan0013 | |
| Investigation into the cause of soapy sediment forming in an airship carburettor float chamber. | 27th Jul 1918 | Box 74 \ 4 scan0014 | |
| Request to conduct experiments on carburetter float chamber corrosion by adding water to petrol. | 2nd Jan 1919 | Box 74 \ 4 scan0015 | |
| Corroded carburetter float chamber and the testing of petrol-proof enamels. | 2nd Jan 1919 | Box 74 \ 4 scan0016 | |
| Petrol and oil proof enamels for carburetter float chamber castings. | 2nd Jan 1919 | Box 74 \ 4 scan0017 | |
| Laboratory note regarding scum formation in a carburetter casing caused by electrolytic action. | 4th Jan 1919 | Box 74 \ 4 scan0018 | |
| Whether the addition of water to petrol produces corrosion in the float chamber. | 18th Sep 1919 | Box 74 \ 4 scan0019 | |
| Request for samples of varnish P.C.12 and V.84 in order to test and report upon them. | 7th Apr 1921 | Box 74 \ 4 scan0020 | |
| Trial of an oil-proof enamel to coat the inside of gearboxes to prevent damage from loose particles. | 26th Apr 1920 | Box 74 \ 4 scan0021 | |
| To Mr. Hives forwarding a letter and a sample of Anti-Benzol Enamel from a supplier for testing. | 11th Mar 1921 | Box 74 \ 4 scan0022 | |
| Copy of a letter from Donald Macpherson & Co. Ltd. regarding a sample of Grey Anti-Benzol Enamel. | 3rd Mar 1921 | Box 74 \ 4 scan0023 | |
| Request for a report on samples of Anti-Benzol Enamel for Gear Boxes and Crank Cases. | 31th Mar 1921 | Box 74 \ 4 scan0024 | |
| Requesting the testing of an Anti-Benzol Enamel sample. | 7th Apr 1921 | Box 74 \ 4 scan0025 | |
| The provision of Battleship Grey paint for crankcases and gearboxes. | 28th Mar 1924 | Box 74 \ 4 scan0026 | |
| Testing Thomas Howse Ltd's 'Thermax' Fireproof Silencer Black Japan enamel. | 7th May 1925 | Box 74 \ 4 scan0027 | |
| Sample of Cerric enamel from John Hall & Sons to be applied to an engine for a type test. | 10th Dec 1931 | Box 74 \ 4 scan0028 | |
| Comparative endurance testing of road wheel enamelling from Dunlop versus Rolls-Royce's own process. | 3rd Mar 1925 | Box 74 \ 4 scan0029 | |
| Arranging the despatch and treatment of six wheels, some by the Dunlop Company and some internally. | 6th Mar 1925 | Box 74 \ 4 scan0030 | |
| Correspondence regarding the enamelling and testing of various road wheels from Dunlop Rubber Co. | 13th Mar 1925 | Box 74 \ 4 scan0031 | |
| Terms and liability for reconditioning wheels supplied by Dunlop Co. for testing. | 13th Mar 1925 | Box 74 \ 4 scan0032 | |
| Enamelling and supply of road wheels from Dunlop Rubber Co. | 30th Mar 1925 | Box 74 \ 4 scan0033 | |
| Request for views on the rusting of experimental Dunlop wheels after a 10,000-mile trial. | 13th May 1925 | Box 74 \ 4 scan0034 | |
| The supply and enamelling of Dunlop wheels for 20 HP and 40/50 HP chassis. | 22th Jun 1925 | Box 74 \ 4 scan0035 | |
| Results of experiments on the enamelling of road wheels. | 23th Jun 1925 | Box 74 \ 4 scan0036 | |
| Comparison of enamelling methods for road wheels between Dunlop and Rolls-Royce. | 25th Jun 1925 | Box 74 \ 4 scan0037 | |
| Trial on artillery wheels. | 25th Jun 1925 | Box 74 \ 4 scan0038 | |
| Follow-up memo regarding the handover and re-enamelling of wire wheels after road tests in France. | 10th Jul 1925 | Box 74 \ 4 scan0039 | |
| Proposal to abandon 'A' type steering in favour of a long chassis with 'B' type steering. | 30th Oct 1919 | Box 74 \ 4 scan0040 | |
| The policy on American chassis manufacture, continuing right-hand drive models and ceasing left-hand drive production. | 31th Oct 1919 | Box 74 \ 4 scan0041 | |
| Instruction from Mr. Royce to change the bevel gear ratio for the Vulture rear axle to 4.75 to 1. | 2nd Feb 1920 | Box 74 \ 4 scan0042 | |
| Confirmation of a telegram regarding instructions for testing and comparing induction pipes for various engines. | 19th Feb 1920 | Box 74 \ 4 scan0043 | |
| Gear ratio alterations and alternatives for the Vulture rear axle. | 20th Feb 1920 | Box 74 \ 4 scan0044 | |
| Extract of a memo regarding induction pipes for the 'Buzzard' engine. | 1st Feb 1920 | Box 74 \ 4 scan0045 | |
| Steering position and pedal mechanism for the 'Buzzard' and 'Vulture' models. | 23th Feb 1920 | Box 74 \ 4 scan0046 | |
| Clarifying the rear axle gear ratios for the 'Buzzard' and 'Vulture' engines. | 29th Mar 1920 | Box 74 \ 4 scan0047 | |
| Mr. Royce's design criticisms for the 'Buzzard' and 'Vulture' rear axle. | 1st Jun 1920 | Box 74 \ 4 scan0048 | |
| Design changes to axle tubes and ratios, referencing schemes 503 and 339. | 30th Jun 1920 | Box 74 \ 4 scan0049 | |
| Approval and specifications for the 'Buzzard' and 'Vulture' rear axle. | 21th Jul 1920 | Box 74 \ 4 scan0050 | |
| Drawing No. LeC.1255 for the 'Vulture' engine crank and ordering the necessary forgings. | 24th Jul 1920 | Box 74 \ 4 scan0051 | |
| Request to alter the 'Vulture' crankshaft, lengthening the journal and moving the front main bearing forward. | 15th Sep 1920 | Box 74 \ 4 scan0052 | |
| Instruction to alter the dimensions of the 'Vulture' crankshaft. | 29th Sep 1920 | Box 74 \ 4 scan0053 | |
| The 'Vulture' Cylinder Head, referencing drawing LeC.1297. | 28th Oct 1920 | Box 74 \ 4 scan0054 | |
| From Mr. Royce discussing the oil relief system for the 'Vulture' engine, focusing on oil pressure and relief pipe sizing. | 1st Nov 1920 | Box 74 \ 4 scan0055 | |
| Request for a report on the design and lubrication of spring shackles and bushes for the Goshawk export chassis. | 9th Jun 1922 | Box 74 \ 4 scan0056 | |
| Drawings for the 20 HP clutch, suggesting additions to the instruction book regarding wear indication and spring adjustment. | 27th Sep 1922 | Box 74 \ 4 scan0057 | |
| The drawing for the 'Stork' front axle radius rod bracket X.4547. | 30th Sep 1922 | Box 74 \ 4 scan0058 | |
| Blueprint for a proposed drive for testing a tyre air pump driven by a camshaft. | 10th Oct 1922 | Box 74 \ 4 scan0059 | |
| Revision to the 'Stork' front axle radius rods, specifically the rear bracket and ball end joint. | 10th Nov 1922 | Box 74 \ 4 scan0060 | |
| Drawings for the 'Heron' air pump for four-wheel brakes, highlighting required modifications to the springs. | 19th Oct 1922 | Box 74 \ 4 scan0061 | |
| Modifications to the front axle radius rods for the 'Heron' & 'Stork' models. | 1st Dec 1922 | Box 74 \ 4 scan0062 | |
| Design changes to steering components, shock absorbers, and axle forgings. | 8th Dec 1922 | Box 74 \ 4 scan0063 | |
| The operating gear for the 'Heron' and 'Stork' exhaust system cut-out. | 8th Dec 1922 | Box 74 \ 4 scan0064 | |
| The general arrangement of 'Stork' & 'Heron' radius rods, side steering tube, and other front-end components. | 8th Dec 1922 | Box 74 \ 4 scan0065 | |
| Modifications to the exhaust system for the 'Stork' and 'Heron' models. | 1st Dec 1922 | Box 74 \ 4 scan0066 | |
| The 'Heron' project schematic N.sch. 1341, requesting prints and noting modifications to the servo motor and brake system. | 30th Dec 1922 | Box 74 \ 4 scan0067 | |
| Modifications to the 'Stork' & 'Heron' front spring shackles, including a new method for securing bolts. | 8th Dec 1922 | Box 74 \ 4 scan0068 | |
| Temporary design for the 'Stork' & 'Heron' steering gear, with a note on the upcoming 'Seagull' design. | 14th Dec 1922 | Box 74 \ 4 scan0069 | |
| Temporary bracket for a bottom front shock absorber for 'Stork' & 'Heron' four-wheel brake systems. | 15th Dec 1922 | Box 74 \ 4 scan0070 | |
| To hold up an experiment for the 'Stork' bonnet due to a new drawing. | 22th Jan 1923 | Box 74 \ 4 scan0071 | |
| Mr. Royce's request for a further vibration test on the Goshawk 11 engine crankcase. | 5th Jun 1923 | Box 74 \ 4 scan0072 | |
| Telegram requesting a reliable magneto for a motor cycle. | 14th Aug 1923 | Box 74 \ 4 scan0073 | |
| Telegram proposing a new three-point engine suspension design. | 14th Nov 1922 | Box 74 \ 4 scan0074 | |
| Telegram instructing on the desired minimal flexibility of the propeller tube. | 3rd Aug 1923 | Box 74 \ 4 scan0075 | |
| Telegram enquiring about the effect of the centre of gyration on vibrations and alternative rigid fixing arrangements. | 20th Dec 1925 | Box 74 \ 4 scan0076 | |
| Telegram clarifying the term 'vigorous damping' for damping rods. | 21th Sep 1923 | Box 74 \ 4 scan0077 | |
| Suspension of the Goshawk 11 power unit to eliminate torque reaction vibration. | 12th Sep 1923 | Box 74 \ 4 scan0078 | |
| Urgent need for experiments on the suspension of 40/50 and Goshawk engines. | 14th Sep 1923 | Box 74 \ 4 scan0079 | |
| Outline of torque reaction vibration experiments to be conducted on Goshawk I and II engines. | 20th Sep 1923 | Box 74 \ 4 scan0080 | |
| Sending drawings for torque reaction dampers on Goshawk I and Goshawk 11 engines. | 20th Sep 1923 | Box 74 \ 4 scan0081 | |
| Procedure to find the centre of gravity of an engine unit in end elevation using a knife-edge balance test. | 1st Sep 1923 | Box 74 \ 4 scan0082 | |
| Page of calculations and diagrams related to moments of mass for a mechanical component. | 24th Sep 1923 | Box 74 \ 4 scan0083 | |
| Blueprint of an 8 G II, 20 H/P Engine Unit showing components, dimensions and total weight. | 24th Sep 1923 | Box 74 \ 4 scan0084 | |
| Telegram received by telephone from Royce regarding the availability of Hives. | 24th Sep 1923 | Box 74 \ 4 scan0085 | |
| The specifications, installation, and removal of the torque reaction damper for the Goshawk 11 engine. | 26th Sep 1923 | Box 74 \ 4 scan0086 | |
| Ongoing engine suspension experiments, stating a full report will be sent soon. | 29th Sep 1923 | Box 74 \ 4 scan0087 | |
| Instructions for locking the front engine suspension on a 6.EX car. | 29th Sep 1923 | Box 74 \ 4 scan0088 | |
| Fitting friction dampers to a 5-Goshawk-11 car at the Coachbuilders. | 1st Oct 1923 | Box 74 \ 4 scan0089 | |
| Suggestion to create a scheme for fitting friction dampers to the 40/50 HP engine mounting. | 1st Oct 1923 | Box 74 \ 4 scan0090 | |
| Private internal memo arranging a meeting for the following Tuesday at 11 o'clock to decide on a matter. | 1st Oct 1923 | Box 74 \ 4 scan0091 | |
| The positive results of new dampers on the Goshawk and recommending their immediate adoption. | 1st Sep 1923 | Box 74 \ 4 scan0092 | |
| Overcoming torque reaction vibration in a 20 HP engine. | 1st Oct 1923 | Box 74 \ 4 scan0093 | |
| 20 HP engine vibrations and the effectiveness of friction dampers. | 12th Jul 1923 | Box 74 \ 4 scan0094 | |
| Investigating and mitigating engine vibration periods through modifications to engine mounting and the addition of weights. | 12th Jul 1923 | Box 74 \ 4 scan0095 | |
| Comparison of various engine mounting configurations and their effects on road performance. | 1st Oct 1923 | Box 74 \ 4 scan0096 | |
| Ongoing engine mounting experiments on a 20 HP unit. | 1st Oct 1923 | Box 74 \ 4 scan0097 | |
| Standardisation of friction dampers for engine mounting to reduce vibrations. | 3rd Oct 1923 | Box 74 \ 4 scan0098 | |
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