| Description | Date | Identifier | |
| From 'R' discussing the acquisition of a personal car and outlining preferences for an owner-driver saloon over a custom-built vehicle. | 11th Apr 1932 | Box 55 \ 1 Scan162 | |
| Allocation and preparation of cars for winter, including models 20-G-4 and 16-G-4. | 7th Nov 1932 | Box 55 \ 1 Scan163 | |
| Letter clarifying a misunderstanding about a company car and offering a replacement model. | 7th Nov 1932 | Box 55 \ 1 Scan164 | |
| Arrangement and allocation of a car for a client at W.W. | 7th Nov 1932 | Box 55 \ 1 Scan165 | |
| Mishandled car arrangement for an individual and the steps for resolution. | 8th Nov 1932 | Box 55 \ 1 Scan166 | |
| The arrangement of a car and a query about sending a 'Dewandre' heater. | 10th Nov 1932 | Box 55 \ 1 Scan167 | |
| Repainting of a demonstration car to address customer criticisms. | 12th Feb 1932 | Box 55 \ 1 Scan168 | |
| Internal memorandum about providing a car for 'R', detailing his preference for an experimental model over a production car. | 14th Nov 1932 | Box 55 \ 1 Scan169 | |
| Clarifying a misunderstanding over a car for personal use versus a model needed for design criticism and future development. | 15th Nov 1932 | Box 55 \ 1 Scan170 | |
| The allocation of a 'Peregrine' experimental car to 'R'. | 16th Nov 1932 | Box 55 \ 1 Scan171 | |
| Provision of a Bensport experimental car instead of a Peregrine for 'R.' due to secrecy concerns. | 18th Nov 1932 | Box 55 \ 1 Scan172 | |
| Painting and heater installation for Sir Henry Royce's car. | 10th Dec 1932 | Box 55 \ 1 Scan173 | |
| From 'R' regarding the replacement of item 16-G-4 with 20-G-4 and its transport to Derby. | 13th Dec 1932 | Box 55 \ 1 Scan174 | |
| Departmental memo regarding a suggested modification to the Change Speed Gear to prevent dirt and water ingress. | 28th Jun 1911 | Box 55 \ 1 Scan175 | |
| Departmental memo regarding a potential alteration to the change speed gear. | 11th Jul 1911 | Box 55 \ 1 Scan176 | |
| Arguing against enclosing the change speed mechanism and brake. | 10th Jul 1911 | Box 55 \ 1 Scan177 | |
| Advantages and approval of 'Frankonia' type mudguards. | 6th Oct 1911 | Box 55 \ 1 Scan178 | |
| Instructing the fitting of mud guards to the Austrian Trials Cars, listing required parts. | 1st Feb 1913 | Box 55 \ 1 Scan179 | |
| Experimental Department memo regarding modifications to chassis 2122 following a 500-mile run. | 4th Feb 1913 | Box 55 \ 1 Scan180 | |
| The completion of experiment No. 155/B, a mud guard for side levers, fitted to chassis 2212, 2224 & 2260. | 6th Feb 1913 | Box 55 \ 1 Scan181 | |
| Instruction sheet detailing the completion of Experiment 155/B concerning side levers and mud guards on specific chassis. | 5th Feb 1913 | Box 55 \ 1 Scan182 | |
| Typed report on an issue with the change speed lever getting choked with mud and a recommendation for a guard. | 14th Jan 1928 | Box 55 \ 1 Scan183 | |
| Instruction requesting a report on fitting 'Lavy Levers' and a mud shield to all Austrian Trials cars. | 18th Mar 1913 | Box 55 \ 1 Scan184 | |
| Fitting increased length levers and mud shields to the Austrian Trials cars. | 19th Mar 1913 | Box 55 \ 1 Scan185 | |
| Departmental memo discussing fitting increased length levers and mud shields to the Austrian trials (Alpenfahrt) cars. | 19th Mar 1913 | Box 55 \ 1 Scan186 | |
| Confirming that long levers and mud-shields are to be fitted to the Alpenfhart cars for the Austrian trials. | 31th Mar 1913 | Box 55 \ 1 Scan187 | |
| Experiment 155/B, a side lever mudguard for a 4-speed gearbox. | 2nd Apr 1913 | Box 55 \ 1 Scan188 | |
| Departmental memo with a final report on a mud-guard for 4-speed side levers, seeking agreement for its standardisation. | 26th Apr 1913 | Box 55 \ 1 Scan189 | |
| Agreement and design issues for a Mud Guard for 4-speed Side Levers. | 28th Apr 1913 | Box 55 \ 1 Scan190 | |
| Proposal to standardize a sheet aluminium mud guard for 4-speed gear levers. | 9th May 1913 | Box 55 \ 1 Scan191 | |
| Departmental memo regarding a proposal to fit a mud guard to all 4-speed levers as standard. | 19th May 1913 | Box 55 \ 1 Scan192 | |
| Proposal to standardize a sheet aluminum mudguard for the 4-speed side gear levers. | 14th May 1913 | Box 55 \ 1 Scan193 | |
| Confirming that Mr Johnson and Mr Royce have signed the agreement for the standardisation of the mudguard for 4-speed side levers. | 20th Aug 1913 | Box 55 \ 1 Scan194 | |
| Design and testing of three different types of splashers (fenders) for a Sports Model car. | 12th Sep 1927 | Box 55 \ 1 Scan195 | |
| Road tests comparing the inferiority of aluminium mud-wings to steel ones due to cracking and repair costs. | 26th Jan 1932 | Box 55 \ 1 Scan196 | |
| Use of aluminium versus steel wings for experimental and customer cars, weighing rust risk against durability. | 28th Jan 1932 | Box 55 \ 1 Scan197 | |
| Issues of rust on steel wings versus cracks in aluminium wings, proposing tests and anti-corrosive treatments. | 29th Jan 1932 | Box 55 \ 1 Scan198 | |
| Failure of steel and aluminium wings during 10,000 miles tests. | 18th Feb 1932 | Box 55 \ 1 Scan199 | |
| Article on the challenges of painting steel wings to prevent rust. | 16th Mar 1932 | Box 55 \ 1 Scan200 | |
| Covering memo for an annotated document regarding 20/25 HP Front Wings. | 4th Apr 1932 | Box 55 \ 1 Scan201 | |
| Movement issues with aluminium front wings on a 20/25 HP car compared to steel wings. | 5th Apr 1932 | Box 55 \ 1 Scan202 | |
| Cover note forwarding a memo from Mr. Evans regarding 20/25 HP Front Wings for comment. | 13th Apr 1932 | Box 55 \ 1 Scan203 | |
| The problem of moving front wings on the 20/25HP model and potential solutions. | 9th Apr 1932 | Box 55 \ 1 Scan204 | |
| Proposed remedy for an issue with the 20/25 HP front wings. | 14th Apr 1932 | Box 55 \ 1 Scan205 | |
| The 20/25 HP Front Wings, attaching a further memo for comment. | 18th Apr 1932 | Box 55 \ 1 Scan206 | |
| Suggestion of an extra wing stay to solve a wing movement complaint on the 20/25 HP model. | 19th Apr 1932 | Box 55 \ 1 Scan207 | |
| Letter regarding the suggestion to use an extra wing stay on the 20/25 HP model's front wings. | 16th Apr 1932 | Box 55 \ 1 Scan208 | |
| Minutes from the 78th meeting regarding a suggestion to alter the specification for Watawata fan belts to the correct length to avoid waste. | 18th Nov 1911 | Box 55 \ 2 Scan001 | |
| Meeting notes discussing the experimental replacement of a Watawata belt with a Whittle belt for driving the fan. | 21th Feb 1912 | Box 55 \ 2 Scan002 | |
| Record card for tests on a Whittle fan belt. | 21th Feb 1912 | Box 55 \ 2 Scan003 | |
| Minutes from two committee meetings discussing the testing and use of Whittle belts for fan drives. | 13th Dec 1911 | Box 55 \ 2 Scan004 | |
| Response regarding a suggestion to use Whittle fan belts, advising that tests are currently proceeding. | 15th Dec 1911 | Box 55 \ 2 Scan005 | |
| Recommendation to adopt Whittle fan belts as standard due to superior longevity over Wata-Wata belts. | 3rd Jun 1912 | Box 55 \ 2 Scan006 | |
| Departmental memo about a noise and knock issue caused by a kink in Whittle fan belts. | 19th Jun 1912 | Box 55 \ 2 Scan007 | |
| The performance and issues with a 1/2 inch Whittle belt for a dynamo drive after 10,000 miles of testing. | 19th Oct 1912 | Box 55 \ 2 Scan008 | |
| Departmental memo discussing the standardisation of the 5/8 inch Whittle belt for the dynamo drive. | 26th Oct 1912 | Box 55 \ 2 Scan009 | |
| Departmental memo concerning the standardisation of a larger 3/4 inch whittle belt for the dynamo drive. | 24th Oct 1912 | Box 55 \ 2 Scan010 | |
| Experimental card detailing tests on dynamo belts for car lighting systems. | 2nd Dec 1912 | Box 55 \ 2 Scan011 | |
| Rig tests comparing the performance and stretch of 1/2 inch and 7/8 inch drive belts. | 7th Jan 1913 | Box 55 \ 2 Scan012 | |
| Re-testing of dynamo and fan belts to identify the causes of failures. | 18th Oct 1912 | Box 55 \ 2 Scan013 | |
| The testing of dynamo and fan belts, suggesting future improvements for comparison. | 7th Feb 1913 | Box 55 \ 2 Scan014 | |
| Requesting the ordering of various belts for dynamo and fan testing. | 14th Feb 1913 | Box 55 \ 2 Scan015 | |
| Requesting the design of an experimental rig for dynamo and fan belts as per Mr. Royce's instructions. | 14th Feb 1913 | Box 55 \ 2 Scan016 | |
| Belts for the dynamo and fan, and instructions for the design of an experimental rig. | 14th Feb 1913 | Box 55 \ 2 Scan017 | |
| Alteration of a dynamo belt on a car for Williamson. | 14th Feb 1918 | Box 55 \ 2 Scan018 | |
| Requesting a comparative test of watta-watta and link whittle fan belts. | 23th Feb 1912 | Box 55 \ 2 Scan019 | |
| Instruction to type some notes for Mr Royce, with two accompanying papers. | 22th Apr 1913 | Box 55 \ 2 Scan020 | |
| Proposal for a belt test rig setup in the Test Shop. | 22th Apr 1913 | Box 55 \ 2 Scan021 | |
| Note on a fan belt test, detailing necessary modifications to driving pulleys when using a standard fan. | 22th Apr 1913 | Box 55 \ 2 Scan022 | |
| Proposing the methodology for Dynamo and Fan belt tests. | 22th Apr 1913 | Box 55 \ 2 Scan023 | |
| To Mr Royce regarding belt tests and accompanying documents. | 23th Apr 1913 | Box 55 \ 2 Scan024 | |
| Request to determine the pull transmitted by a Whittle Vee Belt under specific running conditions. | 19th Jul 1913 | Box 55 \ 2 Scan025 | |
| Instruction sheet for an experiment on an ice-making apparatus for Mr. Royce. | 28th Jul 1913 | Box 55 \ 2 Scan026 | |
| The testing of a 'Basilica' fan belt against other comparable belts. | 30th Jul 1913 | Box 55 \ 2 Scan027 | |
| Notes and tracings for Belt Test X.196. | 30th Jul 1913 | Box 55 \ 2 Scan028 | |
| Instruction memo to Mr Miers regarding flywheel bursting tackle, a whittle belt, and parts sent to Mr Royce. | 5th Sep 1913 | Box 55 \ 2 Scan029 | |
| Proposal for a prolonged fan belt test using a custom-built rig. | 30th Jul 1913 | Box 55 \ 2 Scan030 | |
| Memo asking for advice on testing a tachometer and dynamo using lamps as resistance. | 30th Jul 1913 | Box 55 \ 2 Scan031 | |
| Proposing a new rig and procedure for testing fan belts, seeking advice on the methodology. | 12th Sep 1913 | Box 55 \ 2 Scan032 | |
| Cover memo attaching Mr Moon's memo and sending a separate tracing of a rig for a belt test. | 12th Sep 1913 | Box 55 \ 2 Scan033 | |
| Experiment testing a Basilica Fan Belt. | 16th Sep 1913 | Box 55 \ 2 Scan034 | |
| Design of a belt drive for a dynamo on seaplanes, including a sketch. | 13th Mar 1915 | Box 55 \ 2 Scan035 | |
| Instruction note to Mr Mercer regarding the ordering of tackle for a test. | 18th Mar 1915 | Box 55 \ 2 Scan036 | |
| Performance calculations of Whittle belts and proposing further experiments with different pulley and chain drive configurations. | 9th Apr 1915 | Box 55 \ 2 Scan037 | |
| Testing of a horizontal pulley and belt drive arrangement. | 3rd Nov 1915 | Box 55 \ 2 Scan038 | |
| Query regarding the suitability of a belt or chain drive for an aero starter dynamotor. | 22th Mar 1915 | Box 55 \ 2 Scan039 | |
| The failure of a leather magneto drive coupling for a 200 HP Aero Engine. | 29th Mar 1915 | Box 55 \ 2 Scan040 | |
| Specifications for a belt drive from an engine to a dynamo on Admiralty seaplanes. | 29th Mar 1915 | Box 55 \ 2 Scan041 | |
| The testing of a Whittle belt drive for a dynamo-motor on an aero engine. | 2nd Apr 1915 | Box 55 \ 2 Scan042 | |
| Proposed Whittle belt drive for a dynamo-motor on an aero engine. | 2nd Apr 1915 | Box 55 \ 2 Scan043 | |
| Performance calculations of Whittle belts and proposing further experiments. | 9th Apr 1915 | Box 55 \ 2 Scan044 | |
| Testing different pulley and belt configurations for a 2 1/2 HP drive system. | 12th Apr 1915 | Box 55 \ 2 Scan045 | |
| Forwarding a note from Mr Royce regarding various drives for an Airship dynamo and requesting an order for materials to conduct tests. | 12th Apr 1915 | Box 55 \ 2 Scan046 | |
| Letter to The Whittle Belt Co. inquiring about the purpose and advantage of a rawhide link on a belt, in relation to tests for Admiralty work. | 12th Apr 1915 | Box 55 \ 2 Scan047 | |
| Correspondence with Hans Renold regarding a chain drive specification. | 14th Apr 1915 | Box 55 \ 2 Scan048 | |
| Letter detailing a quotation for chains and wheels, including pricing and technical specifications. | 14th Apr 1915 | Box 55 \ 2 Scan049 | |
| Continuation page concerning a test and the enclosure of a sample chain from Hans Renolds. | 14th Apr 1915 | Box 55 \ 2 Scan050 | |
| Letter from a supplier, Thomas Whittle & Sons Ltd., discussing the specifications and use of raw hide centres in Whittle Belting. | 14th Apr 1915 | Box 55 \ 2 Scan051 | |
| Letter from a supplier explaining the use of rawhide centers in their 'Whittle Belting' to improve tensile strength and prevent stretching. | 14th Nov 1910 | Box 55 \ 2 Scan052 | |
| The testing of Whittle belts for an Aero Dynamo Drive, detailing performance issues and size recommendations. | 17th Apr 1915 | Box 55 \ 2 Scan053 | |
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