| Description | Date | Identifier | |
| Comparison of cooling surfaces for three different radiator types for the 20 HP chassis. | 26th Apr 1924 | Box 77 \ 4 scan0352 | |
| Standardization of a new radiator design for the 20 HP chassis. | 13th Jun 1924 | Box 77 \ 4 scan0353 | |
| Standardisation sheet for the 20 HP radiator and shutter, clarifying manual control and the option for a future thermostat fitting. | 25th Jun 1924 | Box 77 \ 4 scan0354 | |
| New radiator for the 20 HP model and the decision to retain the present cooling area. | 2nd Jul 1924 | Box 77 \ 4 scan0355 | |
| The standardisation of the 20 HP radiator and shutter, noting Mr. Royce's disagreement with thermostat control. | 23th Jun 1924 | Box 77 \ 4 scan0356 | |
| Thermostat versus hand control for radiator louvres on 20HP and 40/50 cars. | 27th Jun 1924 | Box 77 \ 4 scan0357 | |
| Standardisation sheet for the 20 HP radiator and shutter. | 1st Jul 1924 | Box 77 \ 4 scan0358 | |
| Inquiry about a new type of radiator with sunk shutters, which the Sales Conference wishes to adopt. | 2nd Jul 1924 | Box 77 \ 4 scan0359 | |
| Standardisation of a new radiator and shutter for the 20 HP car. | 8th Jul 1924 | Box 77 \ 4 scan0360 | |
| Requesting a sample of radiator shutters for the 20 HP chassis, referencing standardisation sheet No. 4240. | 8th Jul 1924 | Box 77 \ 4 scan0361 | |
| Examination of a 20 HP radiator with square corners. | 10th Jul 1924 | Box 77 \ 4 scan0362 | |
| Standardisation of chassis parts, specifically the radiator and shutter, to improve appearance and design. | 7th Apr 1924 | Box 77 \ 4 scan0363 | |
| Remark on the effect of incorporated shutters on a 20 HP car's top gear hill climbing ability over Alpine passes. | 9th Apr 1924 | Box 77 \ 4 scan0364 | |
| Disadvantages of fitting a warning whistle for boiling water. | 15th Aug 1924 | Box 77 \ 4 scan0365 | |
| Sales conference request for a warning whistle for boiling water on the 20 HP car. | 20th Aug 1924 | Box 77 \ 4 scan0366 | |
| Secret memorandum discussing the design and performance of car radiators and fans, including comparisons and proposed improvements. | 29th Aug 1924 | Box 77 \ 4 scan0367 | |
| Vehicle cooling system performance and limitations, discussing fans, boiling, and water management. | 12th Jul 1923 | Box 77 \ 4 scan0368 | |
| Comparing the radiators on a 20 HP Rolls-Royce and a 20 HP Alfa Romeo chassis. | 12th Jul 1923 | Box 77 \ 4 scan0369 | |
| Comparison of radiator efficiency between a 20 HP car and a 20 HP Alfa Romeo. | 12th Jul 1923 | Box 77 \ 4 scan0370 | |
| Graph comparing the radiator efficiency of a 20 HP R.R. and a 20 HP Alfa Romeo during the Col de la Faucille hill climb. | 15th Dec 1924 | Box 77 \ 4 scan0371 | |
| Supply of a sample radiator with nickel silver shutters and the problems with polishing them. | 15th Dec 1924 | Box 77 \ 4 scan0372 | |
| Finish of 20 HP radiator shutters to avoid a 'tinny' appearance. | 20th Dec 1924 | Box 77 \ 4 scan0373 | |
| Secret memo addressing a complaint about the dull finish on radiator shutters. | 23th Dec 1924 | Box 77 \ 4 scan0374 | |
| Instructing Stores to despatch a set of 20 HP Radiator Shutters to Mr. Cowan at Conduit Street. | 1st Jan 1925 | Box 77 \ 4 scan0375 | |
| Set of 20 HP radiator shutters with a semi-gloss finish, requesting an opinion. | 1st Jan 1925 | Box 77 \ 4 scan0376 | |
| From Hs. to BJ. regarding the circulation of information and a missed discussion. | 6th Jan 1923 | Box 77 \ 5 scan0001 | |
| Requesting the return of papers concerning the circulation of information. | 11th Jan 1923 | Box 77 \ 5 scan0002 | |
| From B.J. requesting papers to be sent to a hotel in Derby. | 18th Jan 1923 | Box 77 \ 5 scan0003 | |
| Copies of documents, noting that the originals cannot be located. | 19th Jan 1923 | Box 77 \ 5 scan0004 | |
| Clarifying the procedure for actioning design points and requests from 'R'. | 24th Jan 1923 | Box 77 \ 5 scan0005 | |
| Outlining the policy on chassis design, emphasizing reliability to avoid the need for frequent repair services. | 29th Jan 1923 | Box 77 \ 5 scan0006 | |
| List of useful physical and mathematical constants and unit conversions. | 19th May 1925 | Box 77 \ 5 scan0007 | |
| Secret memo discussing the creation of a book with details on the 'V' series chassis for officials. | 19th May 1925 | Box 77 \ 5 scan0008 | |
| Adjustments to the steering 'setting' or toe-in for the 40/50 HP model to improve tyre wear. | 27th May 1925 | Box 77 \ 5 scan0009 | |
| Process and challenges of distributing technical information to depots and company officials. | 25th May 1925 | Box 77 \ 5 scan0010 | |
| Proposal outlining two categories for the internal circulation of information to officials and depots. | 28th May 1925 | Box 77 \ 5 scan0011 | |
| Confirming the agreement to supply regular technical information to depots and company officials. | 28th May 1925 | Box 77 \ 5 scan0012 | |
| Requesting a copy of the special book of technical particulars for the 'New Phantom'. | 7th Oct 1925 | Box 77 \ 5 scan0013 | |
| Request to borrow Mr. Robotham's paper on Four Wheel Brakes submitted for the Daimler Graduates Prize. | 26th Apr 1926 | Box 77 \ 5 scan0014 | |
| Requesting 50 copies of a report on the New Phantom engine lubrication system and overoiling. | 20th May 1926 | Box 77 \ 5 scan0015 | |
| Covering letter for a new compilation of information to assist officials with customer complaints. | 20th May 1926 | Box 77 \ 5 scan0016 | |
| Introducing a series of experimental reports to help officials better handle criticisms. | 21th May 1926 | Box 77 \ 5 scan0017 | |
| Folio of information, requesting copies for inspecting engineers, and correcting a typographical error. | 2nd Jun 1926 | Box 77 \ 5 scan0018 | |
| Report on the Phantom lubrication system and overoiling. | 25th Jun 1926 | Box 77 \ 5 scan0019 | |
| Cover memo for a report on the new Phantom engine lubrication system and overoiling issues. | 25th Jun 1926 | Box 77 \ 5 scan0020 | |
| Instructing a report on vibration-damping and shock-absorbing devices to be forwarded and copied. | 25th Jun 1926 | Box 77 \ 5 scan0021 | |
| The confidential nature of compiled material and the distribution of instruction sheets. | 1st Jul 1926 | Box 77 \ 5 scan0022 | |
| Proposing the distribution of experimental information to specific officials. | 1st Jul 1926 | Box 77 \ 5 scan0023 | |
| Distribution list for a publication to avoid sending it to more people than necessary. | 3rd Jul 1926 | Box 77 \ 5 scan0024 | |
| Typed memo giving instructions for handling a secure copy of a document and returning it. | 3rd Jul 1926 | Box 77 \ 5 scan0025 | |
| The distribution list for private technical information. | 14th Jul 1926 | Box 77 \ 5 scan0026 | |
| Establishing a quarterly reporting system for depots to detail the worst customer complaints. | 19th Jul 1926 | Box 77 \ 5 scan0027 | |
| Blank form for logging and analyzing complaints experienced on customers' cars. | 20th Jul 1926 | Box 77 \ 5 scan0028 | |
| The procedure for supplying requested information and tracking data distribution to prevent recurring issues. | 20th Jul 1926 | Box 77 \ 5 scan0029 | |
| Brief typed memo acknowledging receipt of previous correspondence. | 22th Jul 1926 | Box 77 \ 5 scan0030 | |
| Brief memo acknowledging receipt of a private instruction file. | 24th Jul 1926 | Box 77 \ 5 scan0031 | |
| Letter from Maurice Olley to E. W. Hives acknowledging receipt of and gratitude for technical information files. | 16th Aug 1926 | Box 77 \ 5 scan0032 | |
| Request for a list of air service information circulars published by the Chief of the Air Service in Washington. | 25th Aug 1926 | Box 77 \ 5 scan0033 | |
| Cover sheet detailing the distribution list for an Experimental Information File. | 25th Aug 1926 | Box 77 \ 5 scan0034 | |
| Instructing Mr. Brierley to make 50 copies of an attached report on suspension. | 27th Aug 1926 | Box 77 \ 5 scan0035 | |
| Cover note for an information file compiled to assist Depots and Officials with criticisms or complaints. | 15th Sep 1926 | Box 77 \ 5 scan0036 | |
| Establishing the Repair Department as the central body for circulating all information. | 23th Sep 1926 | Box 77 \ 5 scan0037 | |
| Quoting appreciation for a new policy of sharing the results of experiments. | 27th Sep 1926 | Box 77 \ 5 scan0038 | |
| Providing information on the Oil Relay and its required maintenance for depots. | 1st Oct 1926 | Box 77 \ 5 scan0039 | |
| Sheets titled 'Fundamentals of Car Performance'. | 2nd Oct 1926 | Box 77 \ 5 scan0040 | |
| Dispatch log detailing the distribution of documents No.1/14 and No.15 to various individuals and locations. | 15th Sep 1926 | Box 77 \ 5 scan0041 | |
| Circulation of maintenance information for hydraulic shock dampers. | 1st Oct 1926 | Box 77 \ 5 scan0042 | |
| Distributing technical information on suspension and providing corrections for the associated report. | 6th Oct 1926 | Box 77 \ 5 scan0043 | |
| The transfer of technical files and a request for additions to a suspension report. | 7th Oct 1926 | Box 77 \ 5 scan0044 | |
| Acknowledgement of receipt for a Technical Information File from the Instruction School. | 14th Oct 1926 | Box 77 \ 5 scan0045 | |
| Car performance and acceleration, concerning axle and compression ratios and the accuracy of performance curves. | 19th Nov 1926 | Box 77 \ 5 scan0046 | |
| Blueprint of two graphs showing vehicle acceleration curves, comparing different models and axle ratios. | 19th Nov 1926 | Box 77 \ 5 scan0047 | |
| Two graphs comparing vehicle acceleration, one for different compression ratios and another comparing the 20 HP and 40/50 models. | 19th Nov 1926 | Box 77 \ 5 scan0048 | |
| Two graphs illustrating the acceleration performance of different 20 HP engine configurations. | 19th Nov 1926 | Box 77 \ 5 scan0049 | |
| Cover memo regarding information on the fundamentals of car performance and acceleration. | 19th Nov 1926 | Box 77 \ 5 scan0050 | |
| Cover note for a report on the fundamentals of car performance regarding tyres. | 7th Jan 1927 | Box 77 \ 5 scan0051 | |
| Modification to the buffer clearance of springs for Continental chassis. | 2nd Feb 1927 | Box 77 \ 5 scan0052 | |
| Cover sheet for a technical information file containing tabulated data on the standard car. | 9th Sep 1927 | Box 77 \ 5 scan0053 | |
| Recommending the circulation of information for the '20 HP' Starter Motor to Depots. | 23th Sep 1927 | Box 77 \ 5 scan0054 | |
| Investigation into failures of the 20 HP starter motor. | 24th Jun 1927 | Box 77 \ 5 scan0055 | |
| Analysis of faults and potential solutions for a unit's centralization, clutch friction, and spring performance. | 24th Jun 1927 | Box 77 \ 5 scan0056 | |
| Analysis of starter motor engagement issues caused by a weak spring and the quality of cork discs. | 24th Jun 1927 | Box 77 \ 5 scan0057 | |
| Investigations and solutions for starter motor slipping issues. | 24th Jun 1927 | Box 77 \ 5 scan0058 | |
| List of new incorporated springs and their part numbers. | 24th Jun 1927 | Box 77 \ 5 scan0059 | |
| Blueprint sketches analyzing issues with a flywheel and pinion engagement mechanism. | 28th Sep 1927 | Box 77 \ 5 scan0060 | |
| Drawing detailing the addition of oil throwing grooves to an operating bush for a 20HP starter. | 28th Sep 1927 | Box 77 \ 5 scan0061 | |
| Confidential cover note sent to Mr. Harcombe regarding an Experimental Technical File. | 6th Dec 1927 | Box 77 \ 5 scan0062 | |
| Requesting circulation of attached information on the 40/50 HP suspension and for 6 copies to be returned. | 21th Dec 1927 | Box 77 \ 5 scan0063 | |
| Letter from Sydney enquiring about the discontinuation of the 'Fundamentals of Car Performance' data. | 8th Jul 1929 | Box 77 \ 5 scan0064 | |
| Letter to Mr. Peat regarding the discontinuation of the 'Fundamentals of Car Performance' document and new distribution methods. | 20th Aug 1929 | Box 77 \ 5 scan0065 | |
| Drawings for 'Buzzard' and 40/50 HP chassis, bonnet alterations, and a request for a comparative body. | 29th May 1920 | Box 77 \ 5 scan0066 | |
| Modification to a 40/50 model car, raising the dashboard by 2 inches and the radiator by 1 inch. | 12th Jun 1920 | Box 77 \ 5 scan0067 | |
| Extract detailing the redesign and repositioning of the instrument board for the 6.EX chassis. | 17th Jul 1920 | Box 77 \ 5 scan0068 | |
| Future seating proportions for a new chassis and open trials car. | 24th Mar 1920 | Box 77 \ 5 scan0069 | |
| Extract reviewing chassis components, specifically road springs, steering, bodywork, and floorboards. | 17th Jul 1920 | Box 77 \ 5 scan0070 | |
| Particulars of body for 'D' steering with special reference to chassis 6.EX, detailing seat dimensions, instrument board, and windscreen. | 21th Jul 1920 | Box 77 \ 5 scan0071 | |
| Body design modifications, blueprints for chassis 6.EX, and seating arrangements. | 21th Jul 1920 | Box 77 \ 5 scan0072 | |
| Request for drawings or figures regarding the body for 'D' steering, with special reference to chassis 6.EX. | 23th Jul 1920 | Box 77 \ 5 scan0073 | |
| The requirements for a new four-seater body for chassis 6.EX, including dimensions, seating, and colour scheme. | 23th Jul 1920 | Box 77 \ 5 scan0074 | |
| Distributing a print of LeC.1254, regarding particulars of the body for 'D' steering applicable to chassis 5.EX. | 23th Jul 1920 | Box 77 \ 5 scan0075 | |
| | | | |
