| Description | Date | Identifier | |
| The testing of 5/8' and 3/4' Whittle belts for an Aero Dynamo Drive. | 17th Apr 1915 | Box 55 \ 2 Scan054 | |
| Rejecting a Hans Renolds chain sample and specifying requirements for a lighter, more cost-effective vee belt drive for aero work. | 17th Apr 1915 | Box 55 \ 2 Scan055 | |
| The 100-hour test of a Whittle Belt for an Aero Engine Dynamo Drive. | 21th May 1915 | Box 55 \ 2 Scan056 | |
| Specifications for a horizontal drive system using 8' x 4' pulleys and 30' or over shaft centres. | 17th Apr 1915 | Box 55 \ 2 Scan057 | |
| Rejection of a Hans Renolds chain and outlining requirements for a lighter, more affordable vee belt drive for aero work. | 17th Apr 1915 | Box 55 \ 2 Scan058 | |
| The 100-hour test of a Whittle belt for a dynamo drive on aero engines. | 3rd May 1915 | Box 55 \ 2 Scan059 | |
| Test report on a Whittle Belt for an Aero Engine Dynamo Drive. | 21th May 1915 | Box 55 \ 2 Scan060 | |
| Recommendation for pulley and drive specifications to transmit 2.5 HP. | 9th Sep 1916 | Box 55 \ 2 Scan061 | |
| Faulty Balata speed indicator belt for Chassis No. 7-CA, recommending a material change. | 9th Sep 1916 | Box 55 \ 2 Scan062 | |
| Trial of two special V link belts with fibre inserts. | 1st Jan 1919 | Box 55 \ 2 Scan063 | |
| Addressed to Mr. Hives requesting a report on a special type of belting supplied by Thomas G. Gooding. | 27th Jun 1919 | Box 55 \ 2 Scan064 | |
| Comparison of American and English (Thomas Whittle & Sons) Whittle type belting, concluding the American product is superior. | 28th Jul 1919 | Box 55 \ 2 Scan065 | |
| Potential rubbing issue with a special 'V' type driving belt on the dynamo pulley. | 30th Sep 1919 | Box 55 \ 2 Scan066 | |
| Querying the clearance of a new type of belt for the chassis dynamo drive and confirming it is on order. | 28th Oct 1919 | Box 55 \ 2 Scan067 | |
| Chasing a reply regarding the fitment of a special 'V' type dynamo belt with grey fibre links. | 29th Oct 1919 | Box 55 \ 2 Scan068 | |
| That the dynamo belting samples are too large for the dynamo pulley and require alteration. | 4th Nov 1919 | Box 55 \ 2 Scan069 | |
| The failure of a special 9/16 'V' type belt during testing, recommending to continue with the standard Whittle belt. | 11th Dec 1919 | Box 55 \ 2 Scan070 | |
| Investigation into the cause of dynamo noises, tracing it to vibrations from the Whittle belt. | 18th Dec 1919 | Box 55 \ 2 Scan071 | |
| Recommendation to adopt a spring on the tension rod to improve belt performance and prevent noise. | 18th Dec 1919 | Box 55 \ 2 Scan072 | |
| Investigation into dynamo noises, attributing them to belt vibrations and testing potential solutions. | 18th Dec 1919 | Box 55 \ 2 Scan073 | |
| Dunlop belt and recommending the adoption of a spring on the tension rod. | 18th Dec 1919 | Box 55 \ 2 Scan074 | |
| Dynamo belt noises and a proposed solution using an experimental half-link belt from Whittle. | 19th Dec 1919 | Box 55 \ 2 Scan075 | |
| Experimental solution for dynamo belt noises. | 19th Dec 1919 | Box 55 \ 2 Scan076 | |
| Letter from a supplier regarding noisy dynamo belts and a proposal to manufacture them differently to reduce noise. | 2nd Jan 1920 | Box 55 \ 2 Scan077 | |
| Letter from a supplier, Thomas Whittle & Sons, Ltd., regarding a solution for noisy dynamo belts. | 2nd Jan 1920 | Box 55 \ 2 Scan078 | |
| Letter from a supplier discussing a solution for noisy dynamo belts by reversing the leather grain. | 2nd Jan 1920 | Box 55 \ 2 Scan079 | |
| Sample of special leather belting for the chassis dynamo drive from the Whittle Company. | 5th Jan 1920 | Box 55 \ 2 Scan080 | |
| Sample of special belting from the Whittle Company for a chassis dynamo drive. | 5th Jan 1920 | Box 55 \ 2 Scan081 | |
| List of new parts fitted to a car scheduled for a 10,000-mile run, with remarks on the reasons for the changes. | 1st Jan 1920 | Box 55 \ 2 Scan082 | |
| Sample of special leather belting for the chassis dynamo drive from the Whittle Company. | 5th Jan 1920 | Box 55 \ 2 Scan083 | |
| Requesting that Messrs. Whittle and Sons send a technical representative to Derby to discuss the Dynamo Drive belts. | 1st Jan 1920 | Box 55 \ 2 Scan084 | |
| Request to arrange a meeting with Messrs Whittle & Sons to discuss dynamo drive belting. | 7th Jan 1920 | Box 55 \ 2 Scan085 | |
| Extract from Mr. Maddock's report on an issue with a slack dynamo belt causing a clicking noise on Chassis 2EX. | 14th Jan 1920 | Box 55 \ 2 Scan086 | |
| Issues with noisy Lucas dynamos, attributing the fault to the belt drive and recommending a retrospective improvement. | 16th Jan 1920 | Box 55 \ 2 Scan087 | |
| Follow-up memo regarding noise issues with the Dynamo Drive and modified Whittle Belt, requesting an update. | 22th Jan 1920 | Box 55 \ 2 Scan088 | |
| Requesting a note on an interview concerning a Dynamo Drive and modified Whittle Belt. | 23th Jan 1920 | Box 55 \ 2 Scan089 | |
| Notes on parts sent from the United States for experiment, including a Whittle type link belt. | 30th Jan 1920 | Box 55 \ 2 Scan090 | |
| Chasing a reply from the Whittle Belt Company regarding a noisy belt. | 1st Feb 1920 | Box 55 \ 2 Scan091 | |
| Typed memo quoting a letter received from Thos. Whittle & Sons. Ltd. of Warrington. | 12th Feb 1920 | Box 55 \ 2 Scan092 | |
| Awaiting a reply from Thos. Whittle & Sons regarding a new Dynamometer Drive. | 23th Feb 1920 | Box 55 \ 2 Scan093 | |
| Letter from Thomas Whittle & Sons, Ltd. regarding a sample special belt for Dynamo Drives. | 27th Feb 1920 | Box 55 \ 2 Scan094 | |
| List of proposed modifications and additions for a trials car chassis intended for the American company. | 4th Mar 1920 | Box 55 \ 2 Scan095 | |
| Listing various automotive parts received from Mr. Olley for inspection and testing. | 4th Mar 1920 | Box 55 \ 2 Scan096 | |
| Sending a special sample 5/8' wide Whittle belt for a chassis dynamo to stop a humming noise. | 5th Mar 1920 | Box 55 \ 2 Scan097 | |
| The forwarding of sample Whittle type fan belts for experimental testing. | 25th Mar 1920 | Box 55 \ 2 Scan098 | |
| The satisfactory test of a sample Whittle belt with shorter links and a request for more to test on car dynamos. | 18th Mar 1920 | Box 55 \ 2 Scan099 | |
| Requesting an order for one dozen Whittle driving belts for the chassis dynamo. | 22th Mar 1920 | Box 55 \ 2 Scan100 | |
| Request to order a sample 'Forward Patent Endless Belt' for testing as a possible alternative for the dynamo drive. | 26th Mar 1920 | Box 55 \ 2 Scan101 | |
| Notification of the receipt of brush contact springs from Geo. Salter & Co. and endless belts from The Forward Sparking Plug Co. | 1st Apr 1920 | Box 55 \ 2 Scan102 | |
| 10,000-mile chassis test, detailing a battery issue and a list of parts for standardisation. | 9th Apr 1920 | Box 55 \ 2 Scan103 | |
| The testing of an American Whittle fan belt, with recommendations for using tanned leather belts with smaller links. | 19th Apr 1920 | Box 55 \ 2 Scan104 | |
| 10,000-mile run of electrical parts on the 2.EX car, detailing issues with the dynamo. | 20th Apr 1920 | Box 55 \ 2 Scan105 | |
| The procurement and dispatch of half a dozen half-link type Whittle Belting for a chassis dynamo. | 20th Apr 1920 | Box 55 \ 2 Scan106 | |
| Receipt and distribution of half a dozen Whittle belts for the Dynamo Drive. | 21th Apr 1920 | Box 55 \ 2 Scan107 | |
| Dispatch of 6 Whittle Fan Belts with shorter links for testing. | 29th Apr 1920 | Box 55 \ 2 Scan108 | |
| The trial of a 'Forward Patent Endless Belt' as a potential alternative for the dynamo drive. | 3rd Jun 1920 | Box 55 \ 2 Scan109 | |
| The unreliability of American-made fibre-link Whittle fan belts compared to standard all-leather or raw-hide alternatives. | 19th Jul 1920 | Box 55 \ 2 Scan110 | |
| Reliability of American Whittle type fan belts and proposing a raw hide alternative. | 19th Jul 1920 | Box 55 \ 2 Scan111 | |
| Listing the receipt of various parts and components from suppliers. | 27th Jul 1920 | Box 55 \ 2 Scan112 | |
| Letter from the American branch regarding battery and dynamo issues on new chassis cars. | 3rd Sep 1920 | Box 55 \ 2 Scan113 | |
| Issues with noisy and poorly fitting Whittle belts for the dynamo and fan drives. | 6th Sep 1920 | Box 55 \ 2 Scan114 | |
| Requesting a report on U.S.A. manufactured fan belts following an offer that would result in a substantial financial loss. | 12th Sep 1921 | Box 55 \ 2 Scan115 | |
| Order for 250 half link Whittle belts for chassis dynamos. | 20th Sep 1920 | Box 55 \ 2 Scan116 | |
| Letter regarding U.S.A. manufactured fan belts. | 21th Sep 1921 | Box 55 \ 2 Scan117 | |
| Responding to queries about battery charging, dynamo operation, and drive belt tension. | 24th Sep 1920 | Box 55 \ 2 Scan118 | |
| Page 2 of a letter regarding apparent weaknesses in an electrical system and standardizing an improved dynamo. | 24th Sep 1920 | Box 55 \ 2 Scan119 | |
| Standardisation sheets for Castrol 'E' Oil, a Whittle belt, and a silencer. | 4th Oct 1920 | Box 55 \ 2 Scan120 | |
| Extract discussing new chassis troubles and the electrical outfit on post-war cars. | 1st Oct 1920 | Box 55 \ 2 Scan121 | |
| Vibration issues with the Dynamo Whittle belt and proposing shorter links as a solution. | 13th Oct 1920 | Box 55 \ 2 Scan122 | |
| The unsatisfactory performance and issues with leather and grey fibre fan belts. | 20th Oct 1920 | Box 55 \ 2 Scan123 | |
| Standardisation sheet for a Whittle Belt with shorter links for the Dynamo Drive. | 22th Oct 1920 | Box 55 \ 2 Scan124 | |
| Standardisation of a Whittle belt with shorter links to reduce noise. | 4th Oct 1920 | Box 55 \ 2 Scan125 | |
| Test report on special fan belts and the potential scrap cost of reverting to the Whittle belt type. | 25th Oct 1920 | Box 55 \ 2 Scan126 | |
| Issues with Whittle type fan belts with fibre inserts, recommending their disposal due to noise and breakage. | 28th Oct 1920 | Box 55 \ 2 Scan127 | |
| Replacement of fan drive belts due to vibration issues and the management of existing stock. | 29th Oct 1920 | Box 55 \ 2 Scan128 | |
| Selection of a new fan drive belt and the sale of condemned belts. | 29th Oct 1920 | Box 55 \ 2 Scan129 | |
| The testing of a special Whittle fan belt, noting its poor fit on the pulleys. | 6th Nov 1920 | Box 55 \ 2 Scan130 | |
| Letter from a supplier, Thos. J. Gooding, concerning the discontinuation and material specification of V.Link fan belts. | 5th Jan 1921 | Box 55 \ 2 Scan131 | |
| The failure of half link Whittle belts for the dynamo drive, noting issues with unreliability, breakage, and noise. | 6th Jan 1921 | Box 55 \ 2 Scan132 | |
| Critique of a proposed special Whittle belt for a chassis fan drive, advocating for a more elastic design. | 31th Jan 1921 | Box 55 \ 2 Scan133 | |
| Offer of a patented fan and dynamo belt for testing. | 31th Jan 1921 | Box 55 \ 2 Scan134 | |
| Letter from L. Essenhigh offering a patented Vee Leather Belt for driving fans and dynamos for testing purposes. | 29th Jan 1921 | Box 55 \ 2 Scan135 | |
| Fan & Dynamo Belts, referencing a further letter and an attached sample. | 4th Feb 1921 | Box 55 \ 2 Scan136 | |
| Copy of a letter from L. Essenhigh to the Purchasing Dept. regarding a new belt design and offering a sample for testing. | 3rd Feb 1921 | Box 55 \ 2 Scan137 | |
| The unsuitability of a sample fan dynamo belt due to noise and the need for lubrication. | 9th Feb 1921 | Box 55 \ 2 Scan138 | |
| Extract regarding the lengthened Lucas dynamo, specifying the use of a short linked Whittle belt and spring control. | 20th Apr 1921 | Box 55 \ 2 Scan139 | |
| Extract detailing a complaint that dynamo belts are insufficiently stretched, causing them to slacken on cars for the American market. | 6th Jul 1921 | Box 55 \ 2 Scan140 | |
| Decision to switch to half link Whittle Belts for the fan and dynamo on the 40/50 chassis to eliminate a drumming noise. | 21th Jul 1922 | Box 55 \ 2 Scan141 | |
| Expected vibration complaints on 40/50 chassis models, comparing closed cars to open cars. | 22th Jul 1922 | Box 55 \ 2 Scan142 | |
| Axle gear ratios and fan belt vibrations in pre-war cars. | 26th Sep 1922 | Box 55 \ 2 Scan143 | |
| Requesting testing for two types of fan belts submitted by The Dermatine Co. Ltd. | 26th Sep 1922 | Box 55 \ 2 Scan144 | |
| Comparative durability testing of fan belts from the Dermatine Company against those from Dunlop. | 27th Sep 1922 | Box 55 \ 2 Scan145 | |
| Requesting an opinion on a new pattern fan belt supplied for testing by Messrs. Ramsdens Ltd. | 18th Jun 1923 | Box 55 \ 2 Scan146 | |
| The testing of a fan belt from Ramsdens Ltd, which was found to be noisy. | 28th Jun 1923 | Box 55 \ 2 Scan147 | |
| The return of a modified Brammer belt from Ramsdens Ltd. designed to eliminate noise. | 11th Jul 1923 | Box 55 \ 2 Scan148 | |
| From GWH to Mr. Hives regarding the fitting of a 4.EX dynamo drive Ormerod belt to cure vibrations. | 9th Nov 1923 | Box 55 \ 2 Scan149 | |
| Request for a progress report on sample endless and jointless belts for fan and dynamo drives made by J. & W. H. Ormerod Ltd. | 3rd Jan 1924 | Box 55 \ 2 Scan150 | |
| The performance of endless and jointless belts for fan and dynamo drives. | 3rd Jan 1924 | Box 55 \ 2 Scan151 | |
| Ormerod stitched 3-ply fan belt for a 20 HP engine being too soft and pliable. | 9th Jan 1924 | Box 55 \ 2 Scan152 | |
| Ongoing issues with fan and dynamo belts and the search for a satisfactory replacement. | 11th Mar 1924 | Box 55 \ 2 Scan153 | |
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