| Description | Date | Identifier | |
| Instructing an order to be passed to S.U. Co. Ltd. for carburetter needles. | 26th Aug 1936 | Box 121 \ 4 scan0124 | |
| Letter to The S.U. Company Ltd. confirming a telephone conversation and requesting the supply of needles. | 26th Aug 1936 | Box 121 \ 4 scan0125 | |
| Table of numerical data comparing 'LM.8' and 'LM.9' across 16 points. | 26th Aug 1936 | Box 121 \ 4 scan0126 | |
| Letter from the Experimental Department to the S.U. Carburetter Co. Ltd. requesting carburettors and mixture control levers. | 4th Sep 1936 | Box 121 \ 4 scan0127 | |
| Requesting an official order be placed with the S.U. Co. for carburettors and mixture control levers. | 4th Sep 1936 | Box 121 \ 4 scan0128 | |
| Invoices for Jet Needles from The S.U. Company that the Stores Department has no record of receiving. | 4th Sep 1936 | Box 121 \ 4 scan0129 | |
| Unrecorded delivery of jet needles from The S.U. Company. | 15th Sep 1936 | Box 121 \ 4 scan0130 | |
| Chasing replies to previous correspondence and requesting Goods Received sheets for material in the Experimental Department. | 22th Sep 1936 | Box 121 \ 4 scan0131 | |
| Requesting the booking in of various Jet Needles received from the S.U. Co. | 23th Sep 1936 | Box 121 \ 4 scan0132 | |
| High cost of Stromberg carburettors compared to competitors and plans to experiment with alternative suppliers. | 4th Nov 1936 | Box 121 \ 4 scan0133 | |
| Letter from The S.U. Carburetter Co. Ltd regarding a starter carburetter drawing. | 25th Nov 1936 | Box 121 \ 4 scan0134 | |
| Letter from The S.U. Carburetter Co. Ltd requesting inlet port dimensions for a 25/30 model and an induction pipe. | 13th Nov 1936 | Box 121 \ 4 scan0135 | |
| Letter to The S.U. Carburetter Co. clarifying that there is no 'running-in' period for cars from a customer's perspective. | 12th Apr 1937 | Box 121 \ 4 scan0136 | |
| Carburettor needle and seating change for the Phantom III due to new high-pressure S.U. petrol pumps. | 16th Jul 1937 | Box 121 \ 4 scan0137 | |
| Request to S.U. Carburetter Co. Ltd. for experimental flange washers and to replace a faulty Bentley float. | 23th Sep 1937 | Box 121 \ 4 scan0138 | |
| Requesting a covering order for 2 dozen special carburetter flange washers. | 7th Oct 1937 | Box 121 \ 4 scan0139 | |
| Parts list for an induction pipe with hotspot, enabling the use of an S.U. carburettor. | 20th Oct 1937 | Box 121 \ 4 scan0140 | |
| Letter from S.U. Carburetter Co. Ltd to Rolls-Royce Ltd proposing a discussion on improving cruising consumption. | 2nd Nov 1937 | Box 121 \ 4 scan0141 | |
| Letter to S.U. Carburetter Co. Ltd. arranging a meeting to discuss 'part throttle' fuel economy. | 8th Nov 1937 | Box 121 \ 4 scan0142 | |
| Letter from The S.U. Carburetter Co. Ltd. arranging a call to discuss 'part throttle' economy. | 9th Nov 1937 | Box 121 \ 4 scan0143 | |
| Letter to S.U. Carburetter Co. to discuss pricing and testing of carburettors and petrol pumps. | 2nd Dec 1937 | Box 121 \ 4 scan0144 | |
| Letter to T.C. Skinner, Esq. regarding production volumes and product development. | 2nd Dec 1937 | Box 121 \ 4 scan0145 | |
| Letter from S.U. Carburetter Co. Ltd. to arrange a meeting regarding carburetters and pumps. | 6th Dec 1937 | Box 121 \ 4 scan0146 | |
| Letter to Mr. T.C. Skinner of The S.U. Carburetter Co., Ltd. regarding meeting arrangements. | 6th Dec 1937 | Box 121 \ 4 scan0147 | |
| Letter from The S.U. Carburetter Co. Ltd. to W.A. Robotham arranging a meeting. | 8th Dec 1937 | Box 121 \ 4 scan0148 | |
| Letter to T.C. Skinner of S.U. Carburetter Co., Ltd. arranging a meeting. | 9th Dec 1937 | Box 121 \ 4 scan0149 | |
| Letter from The S.U. Carburetter Co. Ltd. to Mr. Robotham rescheduling an appointment. | 10th Dec 1937 | Box 121 \ 4 scan0150 | |
| Letter to Mr. T.C. Skinner of The S.U. Carburetter Co. Ltd. regarding a lunch invitation. | 13th Dec 1937 | Box 121 \ 4 scan0151 | |
| Letter from S.U. Carburetter Co. Ltd. discussing carburetter production, petrol pumps, and a thermostarter unit. | 16th Dec 1937 | Box 121 \ 4 scan0152 | |
| Letter to The S.U. Carburetter Co. Ltd. requesting two thermostarter units for testing. | 20th Dec 1937 | Box 121 \ 4 scan0153 | |
| The performance, issues, and modifications of an S.U. Thermostarter Carburettor. | 29th Dec 1937 | Box 121 \ 4 scan0154 | |
| Letter to The S.U. Company Ltd. concerning an enamelled carburetter body and its 'ebony finish' process. | 15th Jan 1938 | Box 121 \ 4 scan0155 | |
| The despatch of a sample carburettor body to S.U.Co. in Birmingham. | 17th Jan 1938 | Box 121 \ 4 scan0156 | |
| Requesting the dispatch of carburetter parts to The S.U. Carburetter Co., Ltd. | 18th Jan 1938 | Box 121 \ 4 scan0157 | |
| Letter to S.U. Carburettor Co. regarding starter carburettor parts for testing and requesting descriptive data. | 18th Jan 1938 | Box 121 \ 4 scan0158 | |
| Letter to S.U. Carburettor Co. Ltd. requesting the supply of a pair of carburettors to drawing specifications EB.3657-8. | 20th Jan 1938 | Box 121 \ 4 scan0159 | |
| Visit to the S.U. Carburetter Co. of Birmingham to discuss fuel economy and automatic carburation. | 25th Jan 1938 | Box 121 \ 4 scan0160 | |
| Technical discussion on the design and function of fully automatic carburation systems and starting devices. | 25th Jan 1938 | Box 121 \ 4 scan0161 | |
| Conclusion of a report detailing the plan to test an S.U. starting device on a test bed and in a cold chamber. | 25th Jan 1938 | Box 121 \ 4 scan0162 | |
| Payment for a pair of H.4. Carburetters obtained from The S.U. Carburetter Co. | 4th Feb 1938 | Box 121 \ 4 scan0163 | |
| Letter to The S.U. Carburetter Co. Ltd. confirming an order for a pair of H.4. carburetters. | 25th Feb 1938 | Box 121 \ 4 scan0164 | |
| Letter from S.U. Carburetter Co. Ltd. regarding a mistake in the material used for spindles in sample carburetters. | 10th Mar 1938 | Box 121 \ 4 scan0165 | |
| Letter to The S.U. Carburetter Co., Ltd. concerning carburetter testing and component analysis. | 11th Mar 1938 | Box 121 \ 4 scan0166 | |
| Letter from S.U. Carburetter Co. Ltd. discussing a sample carburetter, wear on brass spindles, and a related paper. | 12th Mar 1938 | Box 121 \ 4 scan0167 | |
| Letter from S.U. Carburetter Co. Ltd. sending two old carburettors for inspection of wear in the throttle spindle holes. | 16th Mar 1938 | Box 121 \ 4 scan0168 | |
| Letter to S.U. Carburetter Co. Ltd. regarding the return of two loaned carburettors for inspection. | 23th Mar 1938 | Box 121 \ 4 scan0169 | |
| Wear measurements for S.U. carburettors, comparing sample units with Bentley S.U.s. | 23th Mar 1938 | Box 121 \ 4 scan0170 | |
| Letter to The S.U. Carburetter Co. Ltd. requesting the supply of various carburettor needles with specific dimensions. | 29th Mar 1938 | Box 121 \ 4 scan0171 | |
| Payment for 16 jet needles for experimental use on a Bentley III. | 2nd Apr 1938 | Box 121 \ 4 scan0172 | |
| Request to S.U. Carburetter Co. Ltd. for blueprints of the H.4. carburetter. | 6th Apr 1938 | Box 121 \ 4 scan0173 | |
| Letter detailing issues with thermostat units during experimental testing of an automatic starting carburetter. | 6th Apr 1938 | Box 121 \ 4 scan0174 | |
| Letter from S.U. Carburetter Co. Ltd. enclosing blueprints for the H.4 carburetter. | 11th Apr 1938 | Box 121 \ 4 scan0175 | |
| Payment for three pairs of carburetters. | 25th Apr 1938 | Box 121 \ 4 scan0176 | |
| Letter to the S.U. Carburettor Co. Ltd. requesting a supply of needle seatings for testing on a Bentley. | 27th Apr 1938 | Box 121 \ 4 scan0177 | |
| Official order be sent to the S.U. Carburetter Co. of Birmingham. | 28th Apr 1938 | Box 121 \ 4 scan0178 | |
| Letter confirming the supply of one pair of H.4 carburetters from S.U. Carburetter Co. Ltd. | 28th Apr 1938 | Box 121 \ 4 scan0179 | |
| Letter from S.U. Carburetter Co. Ltd. regarding a request for .093' seatings for a Bentley float chamber. | 10th May 1938 | Box 121 \ 4 scan0180 | |
| Letter from The S.U. Carburetter Co. Ltd. regarding thermostat switches and starter problems. | 31th May 1938 | Box 121 \ 4 scan0181 | |
| Letter from S.U. Carburetter Co. Ltd. regarding a pair of H.4. carburetters with a new hydraulic damper control. | 8th Jun 1938 | Box 121 \ 4 scan0182 | |
| Letter to S.U. Carburetter Co. Ltd. regarding a thermostatic float chamber arrangement. | 21th Jun 1938 | Box 121 \ 4 scan0183 | |
| Letter from The S.U. Carburetter Co. Ltd. regarding a change to float chambers. | 22th Jun 1938 | Box 121 \ 4 scan0184 | |
| Order be sent to cover parts mentioned in an attached letter. | 1st Jul 1938 | Box 121 \ 4 scan0185 | |
| Letter from the Experimental Dept. requesting the supply of H.4 Carburetters and spare parts from The S.U. Carburetter Co. Ltd. | 1st Jul 1938 | Box 121 \ 4 scan0186 | |
| Letter from S.U. Carburetter Co. Ltd. regarding works specification No. 403 and the supply of alternative carburetter suction discs. | 8th Jul 1938 | Box 121 \ 4 scan0187 | |
| Abridged specification for an S.U. Carburetter for works use. | 4th Jul 1938 | Box 121 \ 4 scan0188 | |
| Letter requesting carburetter parts (damped pistons and needles) from The S.U. Carburetter Co., Ltd. | 12th Jul 1938 | Box 121 \ 4 scan0189 | |
| Letter to S.U. Carburetter Co. Ltd. regarding modifications to Bentley needle seatings and float chambers. | 18th Jul 1938 | Box 121 \ 4 scan0190 | |
| Official order be passed to S.U. Carburetter Co.Ltd. for specific parts. | 4th Aug 1938 | Box 121 \ 4 scan0191 | |
| Inquiry to S.U. Carburetter Co. Ltd. regarding the supply of H.V.8 carburetters with hydraulically damped pistons. | 4th Aug 1938 | Box 121 \ 4 scan0192 | |
| Letter from The S.U. Carburetter Co. Ltd. discussing a supply delay for six pairs of HV.8's with hydraulic pistons. | 5th Aug 1938 | Box 121 \ 4 scan0193 | |
| Letter to The S.U. Carburetter Co. regarding noise from an automatic starting device and a proposal to add an air silencer. | 8th Aug 1938 | Box 121 \ 4 scan0194 | |
| Letter to S.U. Carburetter Co. regarding the manufacture of a special carburetter body. | 12th Aug 1938 | Box 121 \ 4 scan0195 | |
| Blueprint of a brass carburettor body for an S.U. fitting, showing multiple views and assembly instructions. | 12th Aug 1938 | Box 121 \ 4 scan0196 | |
| Letter from The S.U. Carburetter Co. Ltd. concerning the manufacture of four special carburetter bodies. | 13th Aug 1938 | Box 121 \ 4 scan0197 | |
| Letter to S.U. Carburetter Co. Ltd. confirming the making and fitting of a steel flange to a carburetter body. | 16th Aug 1938 | Box 121 \ 4 scan0198 | |
| Letter from S.U. Carburetter Co. regarding a details print for a special carburetter body and requesting an official order. | 18th Aug 1938 | Box 121 \ 4 scan0199 | |
| Requesting an official order be sent to the S.U. Carburetter Co. Ltd. for parts received. | 19th Aug 1938 | Box 121 \ 4 scan0200 | |
| Official order to be sent to the S.U. Carburetter Co. Ltd. for four carburetter bodies. | 20th Aug 1938 | Box 121 \ 4 scan0201 | |
| Letter to The S.U. Carburetter Co. Ltd. regarding a modification to a carburetter body. | 25th Aug 1938 | Box 121 \ 4 scan0202 | |
| Technical drawing detailing a modification to a carburettor body, part number 3459. | 25th Aug 1938 | Box 121 \ 4 scan0203 | |
| Request to send an order for carburetter parts to S.U. Carburetter Co. Ltd. | 25th Aug 1938 | Box 121 \ 4 scan0204 | |
| Letter to S.U. Carburetter Co. Ltd. regarding an order for H.4 carburettors and other parts. | 25th Aug 1938 | Box 121 \ 4 scan0205 | |
| Letter from S.U. Carburetter Co. regarding modifications to H4 carburetters and the supply of HV5 oil damper pistons. | 26th Aug 1938 | Box 121 \ 4 scan0206 | |
| Letter from S.U. Carburetter Co. Ltd. regarding a modification to a special carburetter body. | 27th Aug 1938 | Box 121 \ 4 scan0207 | |
| Inquiry to S.U. Carburetter Co. regarding a banjo connection for a drain pipe on float chamber lids to handle flooding conditions. | 7th Sep 1938 | Box 121 \ 4 scan0208 | |
| Letter from S.U. Carburetter Co. Ltd. responding to a request for a modification to an overflow banjo fitting. | 8th Sep 1938 | Box 121 \ 4 scan0209 | |
| Letter to The S.U. Carburetter Co. Ltd. discussing the necessity of a larger carburettor drain pipe to prevent flooding. | 10th Sep 1938 | Box 121 \ 4 scan0210 | |
| Letter discussing the supply of drain pipes and banjos, and an alteration to the specification for HV.4 carburettors. | 10th Sep 1938 | Box 121 \ 4 scan0211 | |
| Request to The S.U. Carburetter Co. Ltd. for 6 needles marked 'Z' with specified dimensions. | 29th Sep 1938 | Box 121 \ 4 scan0212 | |
| Letter from The S.U. Carburetter Co. Ltd. about variations in the thermostatic carburetter. | 6th Oct 1938 | Box 121 \ 4 scan0213 | |
| Letter from The S.U. Carburetter Co. Ltd. detailing carburetter disc clearance and spring selection. | 6th Oct 1938 | Box 121 \ 4 scan0214 | |
| Request to send an order to the S.U. Carburetter Co. for 6 needles. | 7th Oct 1938 | Box 121 \ 4 scan0215 | |
| Letter to S.U. Carburetter Co. Ltd. regarding a thermostatic starting carburetter and needle dimensions. | 7th Oct 1938 | Box 121 \ 4 scan0216 | |
| Letter from S.U. Carburetter Co. Ltd. concerning variables when tuning a thermostatic carburetter. | 8th Oct 1938 | Box 121 \ 4 scan0217 | |
| Letter from The S.U. Carburetter Co. Ltd. discussing needle dimensions and adjustments for cold conditions. | 8th Oct 1938 | Box 121 \ 4 scan0218 | |
| Letter regarding an invoice for 4 Carburetter Bodies and associated pattern costs. | 14th Oct 1938 | Box 121 \ 4 scan0219 | |
| Approving the charges for four carburetter bodies ordered from The S.U. Carburetter Co. | 17th Oct 1938 | Box 121 \ 4 scan0220 | |
| To 'Roy' to order a pair of carburettors from The S.U. Carburetter Co. Ltd. | 18th Oct 1938 | Box 121 \ 4 scan0221 | |
| Letter from the Experimental Department requesting one pair of 1.750 (throttle bore) carburetters from The S.U. Carburetter Co. Ltd. | 18th Oct 1938 | Box 121 \ 4 scan0222 | |
| Requesting an order for carburetter needles and explaining payment delays for experimental parts. | 19th Oct 1938 | Box 121 \ 4 scan0223 | |
| | | | |
