| Description | Date | Identifier | |
| Graph comparing the B.M.E.P. of a Phantom engine using a Solex twin carburetter with different chokes against the standard Phantom carburetter. | 30th Jan 1929 | Box 121 \ 2 scan0101 | |
| Blueprint of a Solex Diffuser Tube with dimensions. | 5th Feb 1929 | Box 121 \ 2 scan0102 | |
| Sectional diagram of a 'Solex' twin choke carburetter tested on a Standard Phantom. | 5th Feb 1929 | Box 121 \ 2 scan0103 | |
| Graph showing power curves for a Phantom engine with a Solex twin carburetter at different choke sizes. | 30th Jan 1929 | Box 121 \ 2 scan0104 | |
| Blueprint of an induction system for a Phantom model, used for Solex carburettor experiments. | 7th Jul 1929 | Box 121 \ 2 scan0105 | |
| Letter from carburettor manufacturer Solex Ltd. discussing consumption readings and air/fuel proportions. | 23th Feb 1929 | Box 121 \ 2 scan0106 | |
| Technical report discussing factors affecting fuel consumption and carburettor performance at low speeds. | 23th Feb 1929 | Box 121 \ 2 scan0107 | |
| Page 3 of a letter from Solex Ltd. to Messrs. Rolls Royce Ltd. regarding comparative testing. | 23th Feb 1929 | Box 121 \ 2 scan0108 | |
| Letter to Solex Ltd. discussing carburetter test results, noting an over-rich mixture and power loss. | 27th Feb 1929 | Box 121 \ 2 scan0109 | |
| Letter from Solex Ltd. acknowledging receipt of correspondence and passing it to their Research Department. | 28th Feb 1929 | Box 121 \ 2 scan0110 | |
| Letter to Solex Ltd. arranging for Mr. Elliott to visit their works in Paris regarding modified carburetters. | 9th Mar 1929 | Box 121 \ 2 scan0111 | |
| Letter from Solex Ltd. acknowledging correspondence and arranging a visit for Mr. Elliott to their Paris works. | 11th Mar 1929 | Box 121 \ 2 scan0112 | |
| Letter from Solex Ltd. concerning petrol consumption tests and requesting a test car for further investigation. | 6th Apr 1929 | Box 121 \ 2 scan0113 | |
| Page 2 of a letter from Solex Ltd. discussing a proposition and overcoming preliminary difficulties. | 6th Apr 1929 | Box 121 \ 2 scan0114 | |
| Letter to Solex Ltd. regarding the testing of a carburetter and awaiting Mr. Royce's opinion. | 8th Apr 1929 | Box 121 \ 2 scan0115 | |
| Letter from Solex Ltd. regarding testing a car at their Research Department in France to resolve technical difficulties. | 10th Apr 1929 | Box 121 \ 2 scan0116 | |
| Letter to Solex Ltd. declining to proceed with the development of their carburetter. | 27th May 1929 | Box 121 \ 2 scan0117 | |
| Letter from Solex Ltd. regretting the decision to stop trials with their carburettors. | 31th May 1929 | Box 121 \ 2 scan0118 | |
| Letter from Solex Ltd. requesting confirmation on whether to retain carburettors and parts sent for testing. | 4th Jul 1929 | Box 121 \ 2 scan0119 | |
| The concluding page of a letter from Solex Ltd. | 4th Jul 1929 | Box 121 \ 2 scan0120 | |
| Letter to Solex Ltd. regarding the return of two 35 MOHD carburettors and an inquiry about their price. | 6th Jul 1929 | Box 121 \ 2 scan0121 | |
| Letter from Solex Ltd regarding the return of two test carburettors and a specially made dual model carburettor. | 11th Jul 1929 | Box 121 \ 2 scan0122 | |
| Letter addressed to Messrs. Solex Ltd. accepting their offer for a carburetter and chokes. | 13th Aug 1929 | Box 121 \ 2 scan0123 | |
| Letter to Solex Ltd. concerning the return of a leaking gauge head for inspection and a report. | 13th Aug 1929 | Box 121 \ 2 scan0124 | |
| Letter from Solex Ltd regarding an order for a carburettor and choke tubes. | 14th Aug 1929 | Box 121 \ 2 scan0125 | |
| Questioning the performance and choke configurations of expanding choke, Claudel, and Solex carburettors. | 17th Sep 1929 | Box 121 \ 2 scan0126 | |
| Tests comparing a single carburetter with a twin carburetter induction system on a 'Japan' engine. | 28th Dec 1929 | Box 121 \ 2 scan0127 | |
| Carburetter system experiments, comparing single versus twin carburetter setups on the Phantom model. | 7th Jan 1930 | Box 121 \ 2 scan0128 | |
| The performance tests of a Solex Duplex carburetter on a Phantom II engine. | 7th Jan 1930 | Box 121 \ 2 scan0129 | |
| Comparison of power curves for a Phantom II engine using three different carburettors. | 7th Jan 1930 | Box 121 \ 2 scan0130 | |
| Carburetter performance tests, comparing the Solex induction system to a standard chassis carburetter. | 7th Jan 1930 | Box 121 \ 2 scan0131 | |
| Graph comparing performance results from Solex twin carburettor tests on a Phantom II engine. | 7th Jun 1930 | Box 121 \ 2 scan0132 | |
| Despatch of a Solex Carburetter for examination. | 7th Jun 1930 | Box 121 \ 2 scan0133 | |
| Road test comparison of Zenith and Solex twin choke carburetters on a 'Japan' engine. | 11th Jun 1930 | Box 121 \ 2 scan0134 | |
| Carburettor design, including choke size, diffusers, and fuel metering for engine performance. | 11th Jun 1930 | Box 121 \ 2 scan0135 | |
| Carburetter testing, comparing Zenith and Stromberg models, and discussing ongoing road tests. | 11th Aug 1930 | Box 121 \ 2 scan0136 | |
| Diagrammatic sketch of a Stutz-Zenith carburettor. | 7th Jun 1930 | Box 121 \ 2 scan0137 | |
| Summary of tests conducted with twin Solex carburettors on a Phantom II vehicle. | 22th Jan 1930 | Box 121 \ 2 scan0138 | |
| Graph comparing the power output of a Solex twin-choke carburetter against the standard carburetter on a Phantom II chassis. | 22th Jan 1930 | Box 121 \ 2 scan0139 | |
| Graph plotting power curves from Solex twin carburettor tests on a Phantom II engine with open exhaust. | 24th Dec 1929 | Box 121 \ 2 scan0140 | |
| Graph comparing Brake Horse Power vs RPM for two different induction pipe and carburettor configurations on an Engine No IV G-8. | 24th Dec 1929 | Box 121 \ 2 scan0141 | |
| Letter to Solex Carburetter Co. Ltd. requesting particulars of horizontal type carburetters. | 25th Jul 1931 | Box 121 \ 2 scan0142 | |
| Letter from Solex Ltd. regarding a 40 m/m horizontal carburettor for a 3.5-litre engine. | 28th Jul 1931 | Box 121 \ 2 scan0143 | |
| Blueprint drawing of a Solex carburettor type M.O.H.D.L. | 16th May 1931 | Box 121 \ 2 scan0144 | |
| 40mm horizontal type carburetter from Solex on sale or return. | 5th Aug 1931 | Box 121 \ 2 scan0145 | |
| Letter to Solex Limited requesting a 40 m/m horizontal type carburetter on a 'sale or return' basis. | 5th Aug 1931 | Box 121 \ 2 scan0146 | |
| Letter from Solex Ltd confirming the dispatch of a 40 m/m horizontal model Solex Carburettor. | 6th Aug 1931 | Box 121 \ 2 scan0147 | |
| Petrol consumption test report comparing an S.U. carburetter with an R.R. carburetter. | 28th Aug 1931 | Box 121 \ 2 scan0148 | |
| Test report on the performance of an S.U. carburetter. | 4th Sep 1931 | Box 121 \ 2 scan0149 | |
| Test report on the performance of a Solex carburetter, detailing its shortcomings in acceleration and noise levels. | 14th Sep 1931 | Box 121 \ 2 scan0150 | |
| Diagram showing two configurations of control linkages for an SU carburettor. | 14th Sep 1931 | Box 121 \ 2 scan0151 | |
| Graph plotting fuel consumption (Pts/B.H.P/H.R) against engine speed (R.P.M) for various carburetor needles at full throttle. | 14th Sep 1931 | Box 121 \ 2 scan0152 | |
| Performance graph showing full throttle metering with a C.S. Unit 110° camshaft and Ph.II silencing system. | 16th Sep 1931 | Box 121 \ 2 scan0153 | |
| Letter from Solex Ltd concerning the testing and approval of a new Self Starting 'Solex' Carburettor. | 16th Sep 1931 | Box 121 \ 2 scan0154 | |
| Letter from Solex Ltd. regarding the upcoming availability of a 40 m/m horizontal type product. | 16th Sep 1931 | Box 121 \ 2 scan0155 | |
| Letter from Solex Ltd. offering to submit a new 40 m/m. FH Die Cast Carburettor with an Auxiliary Self Starting feature for testing. | 29th Sep 1931 | Box 121 \ 2 scan0156 | |
| Letter to Solex Ltd. regarding the poor performance of a horizontal carburetter and its return. | 28th Sep 1931 | Box 121 \ 2 scan0157 | |
| Return of a horizontal type Solex carburetter to Solex Ltd. | 28th Sep 1931 | Box 121 \ 2 scan0158 | |
| Letter to Solex Ltd. declining their offer to send their latest carburetter for trial. | 30th Sep 1931 | Box 121 \ 2 scan0159 | |
| Effect of various choke sizes on carburetter depression in a Phantom II. | 9th Oct 1931 | Box 121 \ 2 scan0160 | |
| Graph showing B.HP and Depression curves for experiments with various choke sizes on a twin carburetter. | 9th Oct 1931 | Box 121 \ 2 scan0161 | |
| Graph of B.HP and induction depression versus R.P.M. for two different carburettor choke sizes on a standard camshaft. | 23th Oct 1934 | Box 121 \ 2 scan0162 | |
| Letter from Solex Ltd. apologising for not being able to make contact at the Motor Show. | 23th Oct 1934 | Box 121 \ 2 scan0163 | |
| Letter to Solex Limited discussing the requirement for double choke down draught carburetters for 6 and 8-cylinder engines. | 24th Oct 1934 | Box 121 \ 2 scan0164 | |
| Letter from Solex Ltd. regarding the availability of 35mm and 40mm dual Downdraught Self-Starting carburettors and arranging a meeting. | 25th Oct 1934 | Box 121 \ 2 scan0165 | |
| Discussion with Solex Carburetter Co. about downdraught carburetters for the Spectre and Wraith models. | 1st Nov 1934 | Box 121 \ 2 scan0166 | |
| Carburettor design, float chamber position, insulating washers, and performance characteristics. | 1st Nov 1934 | Box 121 \ 2 scan0167 | |
| Loan and potential modification of Solex carburetters for the Wraith design. | 25th Feb 1935 | Box 121 \ 2 scan0168 | |
| Letter to Solex Ltd. requesting larger carburetter jets following a preliminary test. | 25th Feb 1935 | Box 121 \ 2 scan0169 | |
| Letter from Solex Ltd. regarding preliminary tests on a 46 m/m downdraught carburettor and sending main jets for experimental work. | 26th Feb 1935 | Box 121 \ 2 scan0170 | |
| Letter to Solex Ltd. inquiring about the availability and price of a maximum speed governor and acknowledging receipt of carburetter jets. | 28th Feb 1935 | Box 121 \ 2 scan0171 | |
| Letter from Solex Ltd. discussing the availability of different governor carburettor models. | 1st Mar 1935 | Box 121 \ 2 scan0172 | |
| Letter to Solex Ltd. requesting a 46 m.m. vertical Governor Carburetter for examination and testing. | 4th Mar 1935 | Box 121 \ 2 scan0173 | |
| Letter from Solex Ltd. regarding their patented Governor Carburettor and arranging a loan of a unit for testing. | 5th Mar 1935 | Box 121 \ 2 scan0174 | |
| Letter from Solex Ltd. regarding the despatch of a 46 m/m Governor carburettor for testing. | 19th Mar 1935 | Box 121 \ 2 scan0175 | |
| Letter to Solex Ltd. concerning the testing of governor and downdraught carburetters. | 23th Mar 1935 | Box 121 \ 2 scan0176 | |
| Letter from Solex Ltd. acknowledging receipt of a 46 m/m Governor carburettor and discussing downdraught carburettor tests. | 25th Mar 1935 | Box 121 \ 2 scan0177 | |
| Test report on the performance of a downdraught twin Solex manifold with central water-heating. | 7th May 1935 | Box 121 \ 2 scan0178 | |
| Letter from Solex Ltd. regarding tests on their carburettors and new developments. | 14th May 1935 | Box 121 \ 2 scan0179 | |
| Letter to Solex Ltd. regarding the suspension of carburettor tests and returning an unsuccessful Governor carburetter. | 16th May 1935 | Box 121 \ 2 scan0180 | |
| Requesting the despatch of carburetter parts to Solex Ltd. on a sale or return basis. | 16th May 1935 | Box 121 \ 2 scan0181 | |
| Letter from Solex Ltd. regarding downdraught and twin carburettor tests. | 17th May 1935 | Box 121 \ 2 scan0182 | |
| Letter from Solex Ltd. offering to send an engineer to demonstrate a Governor carburettor. | 17th May 1935 | Box 121 \ 2 scan0183 | |
| Letter to Solex Ltd. regarding the testing of downdraught and governor carburetters. | 18th May 1935 | Box 121 \ 2 scan0184 | |
| Letter from Solex Ltd. regarding a returned 46 m/m Governor type Solex carburettor. | 20th May 1935 | Box 121 \ 2 scan0185 | |
| Letter from carburettor manufacturer Solex Ltd. concerning trials and performance of Downdraught and Governor models. | 20th May 1935 | Box 121 \ 2 scan0186 | |
| Letter from Solex Ltd. to Messrs. Rolls Royce Ltd., page 2. | 20th May 1935 | Box 121 \ 2 scan0187 | |
| Cover note regarding correspondence with Solex Limited and arranging an interview with Mr Mills. | 10th Jul 1935 | Box 121 \ 2 scan0188 | |
| Letter to Messrs. Solex Limited regarding a proposed visit to the Experimental Department. | 10th Jul 1935 | Box 121 \ 2 scan0189 | |
| Letter from Solex Limited proposing a meeting in Derby to discuss experimental work. | 9th Jul 1935 | Box 121 \ 2 scan0190 | |
| Letter from Solex Ltd discussing performance issues and modifications to a Governor Carburettor. | 26th Jul 1935 | Box 121 \ 2 scan0191 | |
| Letter from Solex Ltd. concerning the allocation of an engineer. | 26th Jul 1935 | Box 121 \ 2 scan0192 | |
| Letter from Solex Ltd. concerning a surging issue with a trial 40 m/m governor carburettor. | 10th Aug 1935 | Box 121 \ 2 scan0193 | |
| Letter from Solex Ltd. concerning vehicle surging issues at high and medium loads. | 10th Aug 1935 | Box 121 \ 2 scan0194 | |
| Letter from Solex Ltd. regarding the testing of their Solex Governor Carburettor. | 4th Sep 1935 | Box 121 \ 2 scan0195 | |
| Letter to Solex Ltd. regarding test results of a Governor Carburetter. | 6th Sep 1935 | Box 121 \ 2 scan0196 | |
| Invoice from Solex Ltd. for parts and requesting payment authorization. | 14th Oct 1935 | Box 121 \ 2 scan0197 | |
| Non-receipt of needle valves and banjo screws from Solex Ltd. | 18th Oct 1935 | Box 121 \ 2 scan0198 | |
| Receipt of valves and screws from Solex Ltd. | 21th Oct 1935 | Box 121 \ 2 scan0199 | |
| Authorising the payment of an invoice from Solex Ltd for Needle Valves and Banjo Screws. | 22th Oct 1935 | Box 121 \ 2 scan0200 | |
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