| Description | Date | Identifier | |
| Carburettor metering graph plotting mixture ratio against air flow for a Stromberg UXT.3 model. | 13th Sep 1932 | Box 122 \ 1 scan0140 | |
| Carburettor metering report graph showing fuel/air mixture ratio against airflow for an S.U. Carburetor. | 1st Jun 1930 | Box 122 \ 1 scan0141 | |
| Carburettor metering report for a DX3 Special Stromberg Downdraft experiment. | 1st Jun 1930 | Box 122 \ 1 scan0142 | |
| Performance comparison graph for Stromberg DX-2 and Solex carburetors on a 65 x 90 6-cylinder engine. | 1st Jun 1930 | Box 122 \ 1 scan0143 | |
| Performance graph comparing Stromberg JX4 and Zenith Down Draught carburettors on a 6 cylinder 80 x 120 engine. | 1st Jun 1930 | Box 122 \ 1 scan0144 | |
| Performance comparison graph between Stromberg UB-1 and Solex 35.V carburetors on a 6 cylinder 80 x 120 engine. | 1st Jun 1930 | Box 122 \ 1 scan0145 | |
| Graph comparing BHP vs RPM for a 4-cylinder 83x95 engine with two different carburettor setups. | 9th Feb 1933 | Box 122 \ 1 scan0146 | |
| Letter from Bendix-Perrot Brakes Ltd. concerning a sample automatic choke control. | 9th Feb 1933 | Box 122 \ 1 scan0147 | |
| Letter to Bendix-Perrot Brakes Ltd. regarding the use of an automatic choke control. | 14th Feb 1933 | Box 122 \ 1 scan0148 | |
| Letter from Bendix-Perrot Brakes Ltd. acknowledging Rolls-Royce's letter regarding the Bendix automatic choke control. | 23th Feb 1933 | Box 122 \ 1 scan0149 | |
| Letter to Stromberg Motor Devices Ltd. requesting information on suppliers of bi-metal thermostats for automatic starting chokes. | 7th May 1934 | Box 122 \ 1 scan0150 | |
| Letter from The Zenith Carburetter Co. Ltd proposing to test their latest downdraught carburetter. | 10th May 1934 | Box 122 \ 1 scan0151 | |
| Letter from The Zenith Carburetter Co Ltd proposing tests of their latest 'V' type carburetter. | 3rd Jul 1934 | Box 122 \ 1 scan0152 | |
| Concluding page of a letter from The Zenith Carburetter Co. Ltd. | 3rd Jul 1934 | Box 122 \ 1 scan0153 | |
| Letter from Zenith Carburetter Co. regarding the supply of downdraught carburettors for a 3 1/2 litre engine. | 16th Jan 1935 | Box 122 \ 1 scan0154 | |
| Letter to Zenith Carburetter Co. Ltd. acknowledging the receipt of two downdraught carburetters for testing. | 19th Jan 1935 | Box 122 \ 1 scan0155 | |
| Letter from Zenith Carburetter Co. Ltd regarding downdraught carburetters, enclosing a catalogue and drawings. | 14th Jan 1935 | Box 122 \ 1 scan0156 | |
| Inquiry to Bendix Ltd. regarding the manufacture of Stromberg carburetters in England. | 18th Feb 1935 | Box 122 \ 1 scan0157 | |
| Letter to Bendix Ltd. reporting test results for a 42 m.m. Downdraught Carburetter and requesting a larger choke model. | 23th Feb 1935 | Box 122 \ 1 scan0158 | |
| Letter from Bendix concerning a new carburetter on test and an alternative smaller venturi tube being sent. | 27th Feb 1935 | Box 122 \ 1 scan0159 | |
| Letter from General Motors Export Company confirming the dispatch of a Stromberg Carburetor and other requested parts. | 1st Mar 1935 | Box 122 \ 1 scan0160 | |
| Letter from Bendix regarding the D.A.42 carburetter, its performance curves, and alternative metering jets. | 1st Mar 1935 | Box 122 \ 1 scan0161 | |
| Letter to Bendix Ltd. acknowledging receipt of a D.A.42 carburetter and requesting details for the automatic starter control. | 5th Mar 1935 | Box 122 \ 1 scan0162 | |
| Letter from Bendix discussing the fitting of an Automatic Choke Control for a D.A.42 carburetter. | 6th Mar 1935 | Box 122 \ 1 scan0163 | |
| Requesting instructions regarding two invoices for carburetter jets from the Zenith Carburetter Co. Ltd. | 27th Feb 1935 | Box 122 \ 1 scan0164 | |
| Official order be placed with The Zenith Carburetter Co. for jets. | 1st Mar 1935 | Box 122 \ 1 scan0165 | |
| Invoice from Bendix Ltd for various carburettor parts. | 8th Mar 1935 | Box 122 \ 1 scan0166 | |
| Authorising payment of a Bendix invoice for carburetter parts. | 11th Mar 1935 | Box 122 \ 1 scan0167 | |
| Requesting payment for invoices from Bendix Ltd. for carburetor parts. | 11th Mar 1935 | Box 122 \ 1 scan0168 | |
| The despatch of carburetter parts to Bendix Ltd. | 14th Mar 1935 | Box 122 \ 1 scan0169 | |
| Letter to Bendix Ltd. regarding the return of a carburetter and associated parts. | 14th Mar 1935 | Box 122 \ 1 scan0170 | |
| Incorrect invoice payment for a Bendix-Stromberg Carburetter. | 14th Mar 1935 | Box 122 \ 1 scan0171 | |
| Letter to The Zenith Carburetter Co. Ltd. regarding the return of a carburetter and spare chokes found to be too small. | 27th Mar 1935 | Box 122 \ 1 scan0172 | |
| Letter to The Zenith Carburetter Co. Ltd. regarding the testing of two downdraught carburetters. | 23th Mar 1935 | Box 122 \ 1 scan0173 | |
| Letter from Zenith Carburetter Co. Ltd. regarding Downdraft carburettors and a pro forma invoice. | 25th Mar 1935 | Box 122 \ 1 scan0174 | |
| Pro forma invoice for carburettor parts from The Zenith Carburetter Co. Ltd. | 25th Mar 1935 | Box 122 \ 1 scan0175 | |
| Pro forma invoice for carburettor components from Zenith Carburetter Co. Ltd. | 25th Mar 1935 | Box 122 \ 1 scan0176 | |
| Return of Zenith carburetters and choke tubes received on a sale or return basis. | 27th Mar 1935 | Box 122 \ 1 scan0177 | |
| Letter from the Zenith Carburetter Co. Ltd. concerning the supply of a specially extended choke tube fixing screw and a drill. | 4th Apr 1935 | Box 122 \ 1 scan0178 | |
| Outline drawing of the Stromberg carburetter for the Kestrel engine. | 9th Apr 1935 | Box 122 \ 1 scan0179 | |
| Letter from Bendix Ltd regarding the acquisition of Stromberg carburetter rights by Zenith Carburetter Company. | 30th Apr 1935 | Box 122 \ 1 scan0180 | |
| Letter to H. Clark of Bendix Limited concerning business related to Stromberg Carburetters. | 1st May 1935 | Box 122 \ 1 scan0181 | |
| Thank you letter from Herbert Clark of Bendix Limited to W.A. Robotham. | 4th May 1935 | Box 122 \ 1 scan0182 | |
| Report comparing an American Downdraught Stromberg Carburetter to the English production model. | 16th May 1935 | Box 122 \ 1 scan0183 | |
| Request to order a Bendix Stromberg Carburetter from the Bendix Co. | 16th May 1935 | Box 122 \ 1 scan0184 | |
| Test report on a Downdraught Stromberg Carburetter with a Central Heated Small Capacity Manifold, noting poor performance at low speeds. | 27th May 1935 | Box 122 \ 1 scan0185 | |
| Test report on a Downdraught Stromberg Carburetter and manifold, detailing faults with fuel loading and low-speed acceleration. | 27th May 1935 | Box 122 \ 1 scan0186 | |
| Recommendation to reduce the choke diameter on an American carburetor to resolve a fault. | 27th May 1935 | Box 122 \ 1 scan0187 | |
| Letter arranging a visit to discuss the tuning of a 48 VI-2 Zenith Carburetter. | 4th Jun 1935 | Box 122 \ 1 scan0188 | |
| Specification and test report for a Zenith Carburetter, Type 48VI-2. | 5th Jun 1935 | Box 122 \ 1 scan0189 | |
| Letter from The Zenith Carburetter Co Ltd regarding carburetter flow rates with gravity tanks versus mechanical pumps. | 6th Jun 1935 | Box 122 \ 1 scan0190 | |
| Letter from Zenith Carburetter Co. regarding modifications to carburetter seating, fuel levels, and materials. | 6th Jun 1935 | Box 122 \ 1 scan0191 | |
| Table from the Zenith Carburetter Co. showing the flow of petrol in pints per hour against head on seating. | 7th Jun 1935 | Box 122 \ 1 scan0192 | |
| The performance and faults of a Zenith 48V1-2 carburetter. | 7th Jun 1935 | Box 122 \ 1 scan0193 | |
| Letter to Zenith Carburetter Co. Ltd. regarding road test results for the Type 48V1-2 carburetter. | 7th Jun 1935 | Box 122 \ 1 scan0194 | |
| Engine cut-out issues when opening the throttle at low speed on a gradient. | 7th Jun 1935 | Box 122 \ 1 scan0195 | |
| Letter from Zenith Carburetter Co Ltd regarding trials and adjustments for the Type 48 VI-2 carburetter. | 11th Jun 1935 | Box 122 \ 1 scan0196 | |
| Letter from The Zenith Carburetter Co. discussing maximum fuel pump pressure and seating requirements. | 11th Jun 1935 | Box 122 \ 1 scan0197 | |
| Letter from Zenith Carburetter Co. Ltd regarding performance improvements of the Type 48 VI-2 carburetter. | 12th Jun 1935 | Box 122 \ 1 scan0198 | |
| Letter from Zenith Carburetter Co. regarding carburetter setup, fuel consumption, and economy jets for a 25 HP engine. | 12th Jun 1935 | Box 122 \ 1 scan0199 | |
| Letter from The Zenith Carburetter Co. regarding induction pipe design, suggesting a saddle type jacket and a 'hot spot'. | 12th Jun 1935 | Box 122 \ 1 scan0200 | |
| Hand-drawn sketch of a carburetter component with a design instruction. | 13th Jun 1935 | Box 122 \ 1 scan0201 | |
| Letter to the Zenith Carburetter Co. Ltd. discussing issues with a downdraught carburettor and proposing two alternative cures. | 13th Jun 1935 | Box 122 \ 1 scan0202 | |
| Invoice from The Zenith Carburetter Co. Ltd. for needles, seatings, and economy jets. | 17th Jun 1935 | Box 122 \ 1 scan0203 | |
| Letter from Zenith Carburetter Co. Ltd discussing two alternatives for carburetter progression. | 17th Jun 1935 | Box 122 \ 1 scan0204 | |
| The second page of a letter from The Zenith Carburetter Co. Ltd. about supplying a carburetter. | 19th Jun 1935 | Box 122 \ 1 scan0205 | |
| Official order be placed with the Zenith Carburetter Co. Ltd. for parts. | 19th Jun 1935 | Box 122 \ 1 scan0206 | |
| Comparison of Zenith Carburetter Type 48VI-2 specifications for standard and supercharged applications. | 19th Jun 1935 | Box 122 \ 1 scan0207 | |
| Modifications to a Stromberg automatic choke and fast idle device fitted to a downdraught carburetter. | 26th Jun 1935 | Box 122 \ 1 scan0208 | |
| Letter from Zenith Carburetter Co. regarding the progress and testing of a 48 VI carburetter. | 1st Jul 1935 | Box 122 \ 1 scan0209 | |
| Page 2 of a letter from Zenith Carburetter Co. regarding diagnosing carburetter defects. | 2nd Jul 1935 | Box 122 \ 1 scan0210 | |
| Letter to The Zenith Carburetter Co. Ltd. postponing work on a carburetter due to preparations for the Motor Show. | 2nd Jul 1935 | Box 122 \ 1 scan0211 | |
| Order for a Bendix Stromberg carburetter and associated parts. | 3rd Jul 1935 | Box 122 \ 1 scan0212 | |
| Performance data for a Zenith carburetter with a Graham supercharger. | 5th Jul 1935 | Box 122 \ 1 scan0213 | |
| Test report detailing settings for a 3-B-IV Supercharged Zenith 48V1-2 Carburetter. | 5th Jul 1935 | Box 122 \ 1 scan0214 | |
| Table of recorded blower pressures at various RPMs. | 5th Jul 1935 | Box 122 \ 1 scan0215 | |
| Letter from Zenith Carburetter Co. Ltd. discussing Stromberg carburetter models and manuals. | 12th Jul 1935 | Box 122 \ 1 scan0216 | |
| Letter from C.H. Fisher arranging a meeting in Derby. | 13th Jul 1935 | Box 122 \ 1 scan0217 | |
| Letter to the Zenith Carburetter Co. Ltd. regarding the testing of Stromberg carburetters on a car. | 13th Jul 1935 | Box 122 \ 1 scan0218 | |
| Letter from Zenith Carburetter Co. Ltd. arranging for tests to be carried out in Derby. | 15th Jul 1935 | Box 122 \ 1 scan0219 | |
| Letter to Stromberg Carburetter Co. Ltd. discussing ongoing carburetter experiments, requesting new hand-controlled choke versions, and asking for details on a larger model. | 6th Aug 1935 | Box 122 \ 1 scan0220 | |
| Carburettor testing and adjustments for a Stromberg DA-42 model. | 6th Aug 1935 | Box 122 \ 1 scan0221 | |
| Recommendations and specifications for a carburetter, including insulating washer thickness. | 6th Aug 1935 | Box 122 \ 1 scan0222 | |
| Letter from Zenith Carburetter Co Ltd regarding carburetter tests, an order, and design revisions. | 8th Aug 1935 | Box 122 \ 1 scan0223 | |
| Page 2 of a letter from Zenith Carburetter Co Ltd regarding the provision of a sample dual carburetter. | 9th Apr 1936 | Box 122 \ 1 scan0224 | |
| Letter to The Zenith Carburetter Co. detailing carburetter modifications for the Phantom III following successful tests. | 9th Apr 1936 | Box 122 \ 1 scan0225 | |
| Letter requesting the conversion of carburettors to underneath direct feed and the supply of modified needles. | 9th Apr 1936 | Box 122 \ 1 scan0226 | |
| Blueprint drawing of a needle for a Stromberg carburetor. | 9th Apr 1936 | Box 122 \ 1 scan0227 | |
| Modifications to the Phantom III Stromberg carburetter. | 9th Apr 1936 | Box 122 \ 1 scan0228 | |
| Blueprint for a needle for a Stromberg carburetor. | 9th Apr 1936 | Box 122 \ 1 scan0229 | |
| Issues with American-bodied Stromberg Ph.III carburetters compared to English-made ones. | 9th Apr 1936 | Box 122 \ 1 scan0230 | |
| Letter from Zenith Carburetter Co. regarding specifications for a Stromberg Carburetter DC.42. | 30th Mar 1936 | Box 122 \ 2 scan0001 | |
| Letter from Zenith Carburetter Co. acknowledging a modification request for a Phantom III engine carburetter. | 14th Apr 1936 | Box 122 \ 2 scan0002 | |
| Alterations and fire risk tests for a Stromberg carburetter D.C.42. | 17th Apr 1936 | Box 122 \ 2 scan0003 | |
| The road and consumption test of a DA-42 Stromberg carburetter, including water temperature observations. | 17th Apr 1936 | Box 122 \ 2 scan0004 | |
| Very urgent memo detailing modifications to a Stromberg Carburetter to resolve hot starting and flooding issues. | 21th Apr 1936 | Box 122 \ 2 scan0005 | |
| Required alterations to the Choke and Accelerator controls for the Stromberg D.C.42 on 25/30 HP chassis. | 22th Apr 1936 | Box 122 \ 2 scan0006 | |
| Test results and specification changes for Stromberg carburettors on 20/25 cars. | 23th Apr 1936 | Box 122 \ 2 scan0007 | |
| Carburation issues and engine tuning for the 25/30 HP Chassis 'L2' Series. | 23th Apr 1936 | Box 122 \ 2 scan0008 | |
| Letter to The Zenith Carburetter Co. Ltd. concerning the poor finish of carburetter floats. | 25th Apr 1936 | Box 122 \ 2 scan0009 | |
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