| Description | Date | Identifier | |
| Use of Castrol lubricating oil to address piston knocks and improve engine performance. | 4th Sep 1919 | Box 76 \ 4 scan0175 | |
| Lubricating and cutting oils used in the works before and during the war, including supplier and product changes. | 9th Sep 1919 | Box 76 \ 4 scan0176 | |
| The testing and use of various lubricating oils, including lard, mineral, and sperm oil, for machinery. | 9th Sep 1919 | Box 76 \ 4 scan0177 | |
| New lubricating oil from W.B. Dick & Co. containing 25% Lard Oil, comparing its price and composition to other oils. | 25th Sep 1919 | Box 76 \ 4 scan0178 | |
| Letter from W.B. Dick & Co Ltd regarding an ideal engine lubricant with 25% lard oil. | 23th Sep 1919 | Box 76 \ 4 scan0179 | |
| Letter from W.B. Dick & Co. Ltd. discussing their gear oil and offering barrels for trial. | 23th Sep 1919 | Box 76 \ 4 scan0180 | |
| Technical specifications for 'ILO' R.R. Motor Oil and 'ILO' S.H. Gear Oil. | 9th Sep 1919 | Box 76 \ 4 scan0181 | |
| Offer for lubricating oil from Messrs. Dick and the general policy on oil specifications. | 9th Sep 1919 | Box 76 \ 4 scan0182 | |
| Merits and risks of various engine oils and recommending specific types for use. | 29th Sep 1919 | Box 76 \ 4 scan0183 | |
| Instances of piston rattles on various cars, tests to resolve the issue, and recommendations for a new piston design. | 13th Feb 1920 | Box 76 \ 4 scan0184 | |
| Technical memorandum discussing solutions for piston rattles, including ring placement and lubricant choice. | 22th Mar 1920 | Box 76 \ 4 scan0185 | |
| Conference summary discussing the causes and potential solutions for piston rattles in engines. | 22th Mar 1920 | Box 76 \ 4 scan0186 | |
| Piston rattle issues, clearances, testing of different piston types, and the impact of lubricating oils. | 22th Mar 1920 | Box 76 \ 4 scan0187 | |
| Engine detonation and piston rattles, recommending deferral of piston modifications pending further investigation. | 22th Mar 1920 | Box 76 \ 4 scan0188 | |
| Timing of modifications to avoid production delays, mentioning a specific change to piston clearance. | 22th Mar 1920 | Box 76 \ 4 scan0189 | |
| Chassis defects aggravated by the viscosity of Amber oil. | 16th Apr 1920 | Box 76 \ 4 scan0190 | |
| Suitability of pure castor oil for lubricating aero engines. | 19th Apr 1920 | Box 76 \ 4 scan0191 | |
| Requesting standard specifications and analysis for lubricating oils for circulation. | 21th May 1920 | Box 76 \ 4 scan0192 | |
| Preference for compound lubricating oils over pure mineral Vacuum Oils, while acknowledging their necessary use in certain regions. | 7th Jun 1920 | Box 76 \ 4 scan0193 | |
| Oil recommendations and potential substitutes following a meeting with the Vacuum Oil Co. | 3rd Jun 1920 | Box 76 \ 4 scan0194 | |
| Lack of standard specification for lubricating oils for cars in America and providing guidance from Mr. Royce on selection and testing. | 7th Jun 1920 | Box 76 \ 4 scan0195 | |
| The performance and advantages of using Wakefield's Castrol lubricating oil in experimental cars. | 8th Jun 1920 | Box 76 \ 4 scan0196 | |
| The performance characteristics of Castrol oil, particularly its low setting point for gearboxes and its tendency for carbon formation. | 8th Jun 1920 | Box 76 \ 4 scan0197 | |
| Benefits of using a high-quality lubricating oil like Castrol for cars. | 11th Jun 1920 | Box 76 \ 4 scan0198 | |
| Enquiry from Messrs. Handley Page Ltd. concerning the use of oils on engines. | 21th Jul 1920 | Box 76 \ 4 scan0199 | |
| Forwarding correspondence regarding lubricating oil for aeroplane engines in India. | 3rd Jul 1920 | Box 76 \ 4 scan0200 | |
| Letter from Handley Page regarding a new lubricating oil for aircraft engines developed by the Burmah Oil Co. | 1st Jul 1920 | Box 76 \ 4 scan0201 | |
| Letter to Handley Page Ltd. regarding a delay in communication about lubricating oil due to works holidays. | 3rd Jul 1920 | Box 76 \ 4 scan0202 | |
| The use and recommendation of Castrol 'R' Oil in engines, gearboxes, and axles. | 22th Jul 1920 | Box 76 \ 4 scan0203 | |
| Letter to The Burmah Oil Co. requesting particulars of a lubricating oil for aircraft engines containing castor oil. | 23th Jul 1920 | Box 76 \ 4 scan0204 | |
| Letter from Burmah Oil Company regarding a sample of lubricating oil for aircraft engine testing. | 26th Jul 1920 | Box 76 \ 4 scan0205 | |
| Letter to The Burmah Oil Co. Ltd. requesting a half-gallon oil sample for laboratory testing before potential engine trials. | 27th Jul 1920 | Box 76 \ 4 scan0206 | |
| Letter from The Burmah Oil Company concerning the provision of lubricating oil for aircraft engine testing. | 28th Jul 1920 | Box 76 \ 4 scan0207 | |
| Suggesting a request for a 2-gallon oil sample from the Vacuum Oil Co. Ltd. for engine testing. | 29th Jul 1920 | Box 76 \ 4 scan0208 | |
| Correspondence and testing of oil from Vacuum Oil Co. Ltd. | 1st Aug 1920 | Box 76 \ 4 scan0209 | |
| Correspondence with Vacuum Oil Co. Ltd. | 5th Aug 1920 | Box 76 \ 4 scan0210 | |
| Letter to Vacuum Oil Co. Ltd. requesting a two-gallon tin of oil for testing on engines. | 4th Aug 1920 | Box 76 \ 4 scan0211 | |
| The advantages of using a compound lubricating oil, like Castrol, over all-mineral oil, particularly for the American market. | 5th Oct 1920 | Box 76 \ 4 scan0212 | |
| Benefits of a specific oil blend regarding wear, running costs, and overhaul intervals. | 10th Oct 1920 | Box 76 \ 4 scan0213 | |
| Cylinder wear with aluminium pistons, suggesting tests with different lubricating oils and piston ring configurations. | 3rd Nov 1920 | Box 76 \ 4 scan0214 | |
| To the laboratory requesting viscosity figures for a sample of Mobiloil 'E' oil. | 27th Sep 1926 | Box 76 \ 4 scan0215 | |
| Laboratory report detailing viscosity tests on a sample of Vacuum Mobiloil 'E' for shock absorbers. | 10th Oct 1926 | Box 76 \ 4 scan0216 | |
| Requesting viscosity figures for attached samples. | 1st Aug 1927 | Box 76 \ 4 scan0217 | |
| Extract suggesting the standard fitting location for the oil syringe. | 17th Nov 1911 | Box 76 \ 4 scan0218 | |
| Meeting minutes excerpt regarding oil syringe storage and systematic lubrication. | 28th Nov 1911 | Box 76 \ 4 scan0219 | |
| Complaint about a gear oil syringe nozzle and potential solutions. | 1st May 1914 | Box 76 \ 4 scan0220 | |
| The bore size of the gear oil syringe and its suitability for existing and future gearboxes. | 26th Jun 1914 | Box 76 \ 4 scan0221 | |
| Proposal for a larger bore nozzle for a gear oil syringe. | 30th Jun 1914 | Box 76 \ 4 scan0222 | |
| The supply and potential standardization of a modified syringe for gearbox oil. | 9th Jul 1914 | Box 76 \ 4 scan0223 | |
| Sending three oil syringes with larger nozzles to determine if they should be fitted as standard. | 10th Jul 1914 | Box 76 \ 4 scan0224 | |
| Internal memorandum regarding an oil syringe and its nozzle's suitability for use with gear oil. | 16th Jul 1914 | Box 76 \ 4 scan0225 | |
| Suitability of a large bore nozzle for a gearbox oil syringe. | 18th Jul 1914 | Box 76 \ 4 scan0226 | |
| Confirming agreement to send out syringes with a larger bore for gearbox oil. | 23th Jul 1914 | Box 76 \ 4 scan0227 | |
| Sourcing a suitable screw-pattern grease syringe with a flexible metal tube for the tool kit. | 24th Jan 1921 | Box 76 \ 4 scan0228 | |
| Set of valve stem lubricators for an Eagle engine and a car engine. | 20th Jun 1918 | Box 76 \ 4 scan0229 | |
| Letter from Brown Brothers Ltd. offering a 'DUCO' Valve Stem Lubricator for testing on post-war models. | 15th Jun 1918 | Box 76 \ 4 scan0230 | |
| From EH to Mr. Mills requesting an order for 24 Duco Valve Stem Lubricators for experimental purposes. | 29th Jan 1919 | Box 76 \ 4 scan0231 | |
| Letter from Brown Brothers Ltd confirming an order for 'Duce' Valve stem lubricators and enquiring about interest in 'Duce' Spring Gaiters. | 1st Feb 1919 | Box 76 \ 4 scan0232 | |
| Letter from Brown Brothers, Limited regarding contracts and the supply of parts for experimental purposes. | 3rd Feb 1919 | Box 76 \ 4 scan0233 | |
| Engine cylinder and valve guide wear after a 10,000-mile test, comparing in-house and externally cast parts. | 28th Jun 1920 | Box 76 \ 4 scan0234 | |
| Different patterns of lubricators and felt-like glands for valve guides. | 21th Jul 1920 | Box 76 \ 4 scan0235 | |
| The wear of valve guides on the 40/50 engine and potential lubrication solutions. | 22th Nov 1920 | Box 76 \ 4 scan0236 | |
| Letter from Brown Brothers Ltd requesting valve dimensions for their Duco Valve Stem Lubricator to suit the latest Rolls Royce cars. | 15th Mar 1921 | Box 76 \ 4 scan0237 | |
| Letter to Brown Bros. Ltd. regarding 'Duco' Valve Stem Lubricators, requesting a sample and information on graphite impregnation. | 19th Jul 1921 | Box 76 \ 4 scan0238 | |
| Letter from Brown Brothers Ltd. regarding Duco valve stem lubricators and newer patterns. | 28th Jul 1921 | Box 76 \ 4 scan0239 | |
| The concluding page of a letter from Brown Brothers Ltd. regarding the suitability of a pattern. | 1st Jun 1922 | Box 76 \ 4 scan0240 | |
| Valve troubles on post-war cars, including excessive wear on valves and guides, and burnt valves. | 1st Jun 1922 | Box 76 \ 4 scan0241 | |
| The causes of excessive valve wear, including faulty springs and poor petrol quality, and trials of lubrication methods. | 1st Jun 1922 | Box 76 \ 4 scan0242 | |
| Solutions for lubricating and reducing wear on valve guides. | 1st Jun 1922 | Box 76 \ 4 scan0243 | |
| Proposing the reintroduction of a gauze disc for spring lid lubricators. | 11th Dec 1920 | Box 76 \ 4 scan0244 | |
| Supply of spring lid lubricators fitted with a gauze from supplier Rotherham & Sons. | 8th Jan 1921 | Box 76 \ 4 scan0245 | |
| The use of spring lid lubricators with gauze discs for air pumps. | 24th Jan 1921 | Box 76 \ 4 scan0246 | |
| List of parts received from Mr. Olley for inspection and testing. | 4th Mar 1920 | Box 76 \ 4 scan0247 | |
| Alemite Lubricators, listing US passenger car companies that have standardized them. | 1st Jun 1920 | Box 76 \ 4 scan0248 | |
| The principle of a spring-loaded ball valve lubricator with a bayonet joint for a grease gun. | 1st Jun 1920 | Box 76 \ 4 scan0249 | |
| Standardisation of grease fittings and proposing a bayonet joint fitting to Mr. Royce. | 1st Jun 1920 | Box 76 \ 4 scan0250 | |
| Proposed design changes to chassis components, including bushes, shackle bolts, and lubrication methods. | 2nd Dec 1919 | Box 76 \ 4 scan0251 | |
| From Rolls-Royce of America regarding the shipment of Alemite lubricators and listing American car companies that have standardized their use. | 1st Jun 1920 | Box 76 \ 4 scan0252 | |
| Letter to Mr. Hives describing a new spring-loaded ball valve lubricator system with a diagram. | 1st Jun 1920 | Box 76 \ 4 scan0253 | |
| Letter to Mr. Hives proposing improved grease fittings with a grease-gun for standardization on cars. | 1st Jun 1920 | Box 76 \ 4 scan0254 | |
| Brief forwarding memo from 'Sft' to 'Hs' concerning a memo received from 'BJ'. | 15th Jul 1920 | Box 76 \ 4 scan0255 | |
| Forwarding a cable from Mr. Olley of Rolls-Royce of America regarding the shipment of lubricators. | 15th Dec 1920 | Box 76 \ 4 scan0256 | |
| The supply of chassis tyre pumps and a separate letter concerning Alemite Lubricators. | 15th Dec 1920 | Box 76 \ 4 scan0257 | |
| The testing and reporting on an Alemite grease gun for potential use on a chassis. | 1st Feb 1921 | Box 76 \ 4 scan0258 | |
| Details on experimental parts from the USA, including different types of oilers for spring shackles. | 30th Jan 1920 | Box 76 \ 4 scan0259 | |
| Comparing a US-made Alemite grease gun against the standard Rotherham type, seeking approval for its adoption. | 3rd Feb 1921 | Box 76 \ 4 scan0260 | |
| Cover note regarding an attached letter from Rotherham & Sons and the forwarding of a sample. | 12th Feb 1921 | Box 76 \ 4 scan0261 | |
| Letter from Rotherham & Sons regarding a patent application for a new lubrication system to compete with the 'Alemite' system. | 9th Feb 1921 | Box 76 \ 4 scan0262 | |
| Rejecting sample grease injectors from R.H. Hill, LTD Sheffield as they are unsuitable. | 2nd Feb 1921 | Box 76 \ 4 scan0263 | |
| Attaching a letter from E.H. Hill Ltd. and requesting sourcing information for a grease gun. | 3rd Mar 1921 | Box 76 \ 4 scan0264 | |
| Letter from Ernest H. Hill Ltd. responding to an enquiry about an 'Alemite' grease gun and lubricator. | 1st Mar 1921 | Box 76 \ 4 scan0265 | |
| Issues with a supplied grease gun from E.H. Hill and recommending the Alemite system as a superior alternative. | 5th Apr 1921 | Box 76 \ 4 scan0266 | |
| The specifications of various grease guns. | 5th Apr 1921 | Box 76 \ 4 scan0267 | |
| The results of pressure gauge tests on three different models of grease guns. | 5th Apr 1921 | Box 76 \ 4 scan0268 | |
| Cover letter attaching correspondence from Ernest H. Hill Ltd. and requesting a sample 'Alemite' Pump and connection. | 11th Apr 1921 | Box 76 \ 4 scan0269 | |
| Letter from Ernest H. Hill Ltd. regarding an 'Alemite' Grease Gun and potential alterations. | 8th Apr 1921 | Box 76 \ 4 scan0270 | |
| List of weights for various models of empty grease guns. | 14th Apr 1921 | Box 76 \ 4 scan0271 | |
| Scheme for a front shock absorber for the Goshawk I and Goshawk 11, including differences in the connecting rod and lubrication system. | 18th Apr 1921 | Box 76 \ 4 scan0272 | |
| Adaptation of the Goshawk 11 brake equalizing gear, with suggestions for lubrication and bracket design. | 18th Apr 1921 | Box 76 \ 4 scan0273 | |
| The 'Alemite' Grease Gun and arranging a meeting with Ernest H. Hill Ltd. | 20th Apr 1921 | Box 76 \ 4 scan0274 | |
| | | | |
