| Description | Date | Identifier | |
| Letter to Messrs. Ferodo Ltd. querying the billing for a recent delivery of 'Fero-Grip' fan belts. | 7th Feb 1938 | Box 135 \ 1 scan0122 | |
| Letter from Ferodo Limited about supplying experimental fan belts free of charge. | 8th Feb 1938 | Box 135 \ 1 scan0123 | |
| Letter from Ferodo Limited concerning the disappointing initial tests on two belts that were returned. | 9th Feb 1938 | Box 135 \ 1 scan0124 | |
| Letter from John Marston Limited regarding a 6' fan sent for testing. | 11th Feb 1938 | Box 135 \ 1 scan0125 | |
| Letter to The Gates Rubber Co. regarding issues with a fan belt drive and the testing of American belts. | 15th Feb 1938 | Box 135 \ 1 scan0126 | |
| Letter to The Gates Rubber Co. discussing issues with British-made belts and requesting suitable American belts for testing. | 15th Feb 1938 | Box 135 \ 1 scan0127 | |
| Letter to The Gates Rubber Co. regarding an official order for belts and fan drives. | 15th Feb 1938 | Box 135 \ 1 scan0128 | |
| Letter to Messrs. B.N. Purdy enquiring about a new belting construction and its applicability to automobile vee section belts. | 1st Mar 1938 | Box 135 \ 1 scan0129 | |
| Letter from a supplier, B. N. Purdy, concerning an enquiry for vee-section automobile belts and other drive belts. | 2nd Mar 1938 | Box 135 \ 1 scan0130 | |
| Letter to Messrs. B.N.Purdy requesting a sample fan belt for testing, referencing drawing EW.1518. | 3rd Mar 1938 | Box 135 \ 1 scan0131 | |
| Request to order one fan belt from The British Tyre & Rubber Co. | 4th Mar 1938 | Box 135 \ 1 scan0132 | |
| Letter from B. N. Purdy clarifying details for a fan belt from drawing EW.1518. | 4th Mar 1938 | Box 135 \ 1 scan0133 | |
| Letter from The Gates Rubber Company regarding the performance, construction, and supply of sample fan belts. | 4th Mar 1938 | Box 135 \ 1 scan0134 | |
| Letter discussing the comparative construction, advantages, and issues of various industrial belts, referencing a Mr. Steadman. | 4th Mar 1938 | Box 135 \ 1 scan0135 | |
| Letter discussing sample belts and pulley specifications for parts EB-221 and EXS.194, with engineering recommendations. | 4th Mar 1938 | Box 135 \ 1 scan0136 | |
| Final page of a letter requesting feedback on the performance of trial belts. | 7th Mar 1938 | Box 135 \ 1 scan0137 | |
| Request for details on a fan hub rear cover with a felt grease seal for scheme ECD.524. | 7th Mar 1938 | Box 135 \ 1 scan0138 | |
| Letter clarifying the circumference dimensions of a fan belt from drawing EW.1518. | 7th Mar 1938 | Box 135 \ 1 scan0139 | |
| Letter to Ferodo Ltd. regarding an investigation into fan belt failures. | 19th Mar 1938 | Box 135 \ 1 scan0140 | |
| Letter from the Experimental Department requesting a supply of belts for production. | 19th Mar 1938 | Box 135 \ 1 scan0141 | |
| Letter from Ferodo Limited concerning an investigation into fan belt failures and the production of part no. EW.1518. | 22th Mar 1938 | Box 135 \ 1 scan0142 | |
| Letter from Goodyear regarding the supply and manufacture of belts, referencing order and part numbers. | 7th Apr 1938 | Box 135 \ 1 scan0143 | |
| The despatch and fitting instructions for a high-speed fan and an experimental belt for a customer's car. | 8th Apr 1938 | Box 135 \ 1 scan0144 | |
| Listing the overall lengths of various engine models. | 8th Apr 1938 | Box 135 \ 1 scan0145 | |
| Request for the production of a set of fan parts and pulleys for standardisation on the D. series. | 13th Apr 1938 | Box 135 \ 1 scan0146 | |
| Letter from Ferodo Limited confirming the price for belts, part number EW.1775. | 28th Apr 1938 | Box 135 \ 1 scan0147 | |
| Follow-up letter from The Gates Rubber Company regarding test results for two special belts. | 9th May 1938 | Box 135 \ 1 scan0148 | |
| Letter to Ferodo Ltd. regarding fan belt tests using a Phantom III fan. | 28th May 1938 | Box 135 \ 1 scan0149 | |
| Letter from Ferodo Limited confirming they will conduct fan belt tests on a Phantom III fan. | 30th May 1938 | Box 135 \ 1 scan0150 | |
| Requesting the assembly and dispatch of a five-blade Cadillac type fan to Ferodo Ltd. for fan belt testing. | 9th Jun 1938 | Box 135 \ 1 scan0151 | |
| Letter to Messrs. Ferodo Ltd. regarding the testing of Phantom III fan belts and pulleys. | 24th Jun 1938 | Box 135 \ 1 scan0152 | |
| Letter to Goodyear Tyre & Rubber Co. regarding the supply and quotation for fan belts. | 27th Jun 1938 | Box 135 \ 1 scan0153 | |
| Letter from Goodyear Tyre & Rubber Co. regarding the production and pricing of Fan Belts. | 5th Jul 1938 | Box 135 \ 1 scan0154 | |
| Reducing fan horsepower by testing a flexible blade fan design based on a Cadillac model for the Wraith. | 7th Jul 1938 | Box 135 \ 1 scan0155 | |
| Letter to Ferodo Ltd. regarding the failure of a 'Ferogrip' fan belt during testing. | 14th Jul 1938 | Box 135 \ 1 scan0156 | |
| Returning a failed fan belt to the supplier, Ferodo Ltd. | 14th Jul 1938 | Box 135 \ 1 scan0157 | |
| Letter from Goodyear regarding the availability of full data on fan belts. | 18th Jul 1938 | Box 135 \ 1 scan0158 | |
| Letter from Ferodo Limited concerning the examination and possible failure cause of a fan belt. | 18th Jul 1938 | Box 135 \ 1 scan0159 | |
| Official order for Ferodo 'Ferobestos' solid bar. | 18th Jul 1938 | Box 135 \ 1 scan0160 | |
| Letter to Goodyear Tyre & Rubber Co. Ltd. regarding the supply and performance of fan belts. | 19th Jul 1938 | Box 135 \ 1 scan0161 | |
| Operating conditions and specifications for two types of fan belts, EB.1775 and E.89343. | 19th Jul 1938 | Box 135 \ 1 scan0162 | |
| Follow-up letter from The Gates Rubber Company regarding the testing of special belts EXS.194 and EB-221. | 25th Jul 1938 | Box 135 \ 1 scan0163 | |
| Postscript about Captain George E.T. Eyston's forthcoming world speed record attempt. | 9th Aug 1938 | Box 135 \ 1 scan0164 | |
| Letter to The British Thermostat Co. Ltd. regarding an unrequested 12-volt motor and fan blade and a disputed charge. | 9th Aug 1938 | Box 135 \ 1 scan0165 | |
| Letter from Goodyear discussing the supply, specifications, and pricing of V-Belts. | 10th Aug 1938 | Box 135 \ 1 scan0166 | |
| Letter from The Goodyear Tyre & Rubber Co. inviting a recipient to visit their works. | 10th Aug 1938 | Box 135 \ 1 scan0167 | |
| Letter from Ferodo Limited regarding fan testing conditions and a proposed visit. | 12th Aug 1938 | Box 135 \ 1 scan0168 | |
| Letter from The British Thermostat Co., Ltd. regarding the cost of an experimental 12-volt motor and fan. | 12th Aug 1938 | Box 135 \ 1 scan0169 | |
| Letter to J.N. Longley of Ferodo Limited, cancelling a meeting arrangement. | 13th Aug 1938 | Box 135 \ 1 scan0170 | |
| Letter from J. & A. Hillman Ltd. outlining the advantages of their patented 'Hillman Cebon' fan belts. | 15th Aug 1938 | Box 135 \ 1 scan0171 | |
| The second page of a letter from Hillman Dudley discussing fan belt solutions. | 15th Aug 1938 | Box 135 \ 1 scan0172 | |
| Letter to Goodyear Tyre & Rubber Co. regarding a works visit to discuss belt manufacturing and a request for a revised quotation. | 15th Aug 1938 | Box 135 \ 1 scan0173 | |
| Requesting an official order for parts to be sent to Messrs. Ferodo. | 17th Aug 1938 | Box 135 \ 1 scan0174 | |
| Letter from Goodyear regarding a delay in visiting due to factory holidays and a pending update on tool charges. | 17th Aug 1938 | Box 135 \ 1 scan0175 | |
| Letter from The British Thermostat Co., Ltd. regarding a credit for a returned 12-volt motor and fan. | 18th Aug 1938 | Box 135 \ 1 scan0176 | |
| Letter from The British Thermostat Co., Ltd. regarding a returned fan and a credit note for an invoice error. | 18th Aug 1938 | Box 135 \ 1 scan0177 | |
| Letter from Ferodo Limited regarding a credit request for a returned fan belt. | 19th Aug 1938 | Box 135 \ 1 scan0178 | |
| Letter to a supplier regarding an invoicing error and an order for thermostats. | 20th Aug 1938 | Box 135 \ 1 scan0179 | |
| Letter from The British Thermostat Co., Ltd. regarding a credit note and holding up the manufacture of thermostats. | 22th Aug 1938 | Box 135 \ 1 scan0180 | |
| Letter to Ferodo Ltd. regarding machining difficulties with Ferobestos NW.1 material and a request for samples. | 23th Aug 1938 | Box 135 \ 1 scan0181 | |
| Failed five-blade fan during fan belt tests conducted by Messrs. Ferodo Ltd. | 25th Aug 1938 | Box 135 \ 1 scan0182 | |
| Letter from Ferodo Limited regarding machining difficulties with Ferobestos N.W.1 material and preparing new samples. | 25th Aug 1938 | Box 135 \ 1 scan0183 | |
| Letter to the Gates Rubber Company regarding the initial results of comparative belt tests. | 26th Aug 1938 | Box 135 \ 1 scan0184 | |
| Requesting analysis of a failed Cadillac five-blade fan from a test rig. | 30th Aug 1938 | Box 135 \ 1 scan0185 | |
| Letter from British Tyre & Rubber Co. Ltd. regarding a drawing for a Fan Blade vulcanizing mould arrangement. | 30th Aug 1938 | Box 135 \ 1 scan0186 | |
| Cancelling previous grease packing instructions and standardizing on a single grease for the chassis. | 31th Aug 1938 | Box 135 \ 1 scan0187 | |
| Covering order for Ferobestos bushes and thrust screws. | 31th Aug 1938 | Box 135 \ 1 scan0188 | |
| Letter from The Gates Rubber Company regarding the development and successful testing of fan belts. | 31th Aug 1938 | Box 135 \ 1 scan0189 | |
| Letter from Goodyear providing a quotation for fan belts and detailing the associated mould equipment charges. | 1st Sep 1938 | Box 135 \ 1 scan0190 | |
| Requesting the cost to make a mould for vulcanising fan blades for experimental purposes. | 2nd Sep 1938 | Box 135 \ 1 scan0191 | |
| Letter to Ferodo Ltd. requesting two pieces of 'Ferobestos' material based on drawings EXS.1008 and EXS.1009. | 3rd Sep 1938 | Box 135 \ 1 scan0192 | |
| Letter from Ferodo Limited acknowledging receipt of a letter and confirming items are being prepared for delivery. | 6th Sep 1938 | Box 135 \ 1 scan0193 | |
| The dispatch of a loaned five-blade fan to Messrs. Ferodo Ltd. | 8th Sep 1938 | Box 135 \ 1 scan0194 | |
| Requesting an official order be sent to Ferodo Ltd for 'Ferobestos' parts. | 8th Sep 1938 | Box 135 \ 1 scan0195 | |
| Arranging the loan of a five-bladed fan to Messrs. Ferodo Ltd. | 12th Sep 1938 | Box 135 \ 1 scan0196 | |
| Letter from Goodyear regarding the supply and pricing of belts for testing and comparison. | 13th Sep 1938 | Box 135 \ 1 scan0197 | |
| Official order be sent to Goodyear Tyre & Rubber Co. Ltd. for two fan belts. | 14th Sep 1938 | Box 135 \ 1 scan0198 | |
| Instruction memo regarding the use of Mobilgrease No.6 for packing all fans. | 15th Sep 1938 | Box 135 \ 1 scan0199 | |
| Letter from The Gates Rubber Company regarding the testing and development of belts for the Experimental Department. | 20th Sep 1938 | Box 135 \ 1 scan0200 | |
| Letter from Ferodo Limited regarding the dispatch of Ferobestos NW parts samples. | 20th Sep 1938 | Box 135 \ 1 scan0201 | |
| Letter to Ferodo Ltd. regarding the urgent production of a new fan belt, mould charges, and other supplied parts. | 21th Sep 1938 | Box 135 \ 1 scan0202 | |
| Letter from Ferodo Limited enclosing an advance report on fan belt tests. | 22th Sep 1938 | Box 135 \ 1 scan0203 | |
| Test report on a Dayton Cog VC 17 belt, detailing measurements and test termination. | 22th Sep 1938 | Box 135 \ 1 scan0204 | |
| Test report on a Gates Vulco No.22316 belt, detailing performance and cause of failure. | 22th Sep 1938 | Box 135 \ 1 scan0205 | |
| Letter from Ferodo Limited concerning the supply and manufacturing costs of Ferobestos NW1 pieces to drawings EXS.1008 and 1009. | 22th Sep 1938 | Box 135 \ 1 scan0206 | |
| Telegram regarding an untraceable Rotascope sent to Longley, Friction Phone, Chapel-en-le-Frith. | 22th Sep 1938 | Box 135 \ 1 scan0207 | |
| Message to Mr. Holme at Friction Phone regarding corrected dimensions for a fan on drawing EB.4204. | 23th Sep 1938 | Box 135 \ 1 scan0208 | |
| Instruction to cancel previous fan specifications and fit standard Wraith blades to B.III and B.60 engines. | 1st Oct 1938 | Box 135 \ 1 scan0209 | |
| Letter to Ferodo Ltd. discussing a failed fan belt, horsepower figures, and receipt of testing equipment. | 4th Oct 1938 | Box 135 \ 1 scan0210 | |
| The loan of a Ph.III five-blade fan blade set and two Goodyear fan belts to Messrs. Ferodo Ltd. | 3rd Oct 1938 | Box 135 \ 1 scan0211 | |
| Proposal to manufacture and test a standardized die-cast fan hub and pulley for cost reduction across various models. | 7th Oct 1938 | Box 135 \ 1 scan0212 | |
| Letter from Ferodo Limited concerning the testing and failure analysis of fan belts. | 6th Oct 1938 | Box 135 \ 1 scan0213 | |
| Letter from Ferodo Limited reporting on the performance results of fan and belt tests. | 7th Oct 1938 | Box 135 \ 1 scan0214 | |
| Letter to Goodyear concerning replacement fan belt sizes for Phantom II and III cars, detailing different specifications. | 7th Oct 1938 | Box 135 \ 1 scan0215 | |
| Correspondence clarifying the correct replacement fan belts for various models, including those in the U.S.A. | 7th Oct 1938 | Box 135 \ 1 scan0216 | |
| Despatch note requesting belt sections be sent to The Gates Rubber Company in Denver, USA. | 7th Oct 1938 | Box 135 \ 1 scan0217 | |
| Letter to The Gates Rubber Company detailing the results of comparative belt testing. | 7th Oct 1938 | Box 135 \ 1 scan0218 | |
| Letter to The Gates Rubber Co. discussing fan belt horsepower test results and performance. | 7th Oct 1938 | Box 135 \ 1 scan0219 | |
| Test report detailing performance measurements and the eventual collapse of a Gates Vulco belt. | 22th Sep 1938 | Box 135 \ 1 scan0220 | |
| Test results for a Dayton Cog VC 17 belt, detailing performance data and the reason for test cessation. | 22th Sep 1938 | Box 135 \ 1 scan0221 | |
| | | | |
