| Description | Date | Identifier | |
| Price list for a Nash-Hytor Vacuum Pump and associated components. | 30th Jun 1938 | Box 122 \ 4 scan0175 | |
| Blueprint for a carburettor flow bench. | 13th Jun 1938 | Box 122 \ 4 scan0176 | |
| General report on carburetter complaints and modifications for the 30 HP and Wraith UII models. | 20th Jul 1938 | Box 122 \ 4 scan0177 | |
| Listing modifications and resolutions for issues across various car models including 30 HP, Wraith, Bentley, and Phantom. | 20th Jul 1938 | Box 122 \ 4 scan0178 | |
| Continued list of issues and modifications for the Phantom III model. | 20th Jul 1938 | Box 122 \ 4 scan0179 | |
| Letter to R. Railton requesting information on the duplex carburetter and induction system of a Terraplane 6. | 4th Aug 1938 | Box 122 \ 4 scan0180 | |
| Letter to Automobiles Hotchkiss requesting information on their double choke downdraught carburetter setup. | 4th Aug 1938 | Box 122 \ 4 scan0181 | |
| Letter to Mr. Ainsworth regarding tin-plated pistons and big end bearings. | 4th Aug 1938 | Box 122 \ 4 scan0182 | |
| Proposal from Norman Engineering Company for a Size L6 'Nash Hytor' Vacuum Pump for a carburetter testing plant. | 20th Aug 1938 | Box 122 \ 4 scan0183 | |
| Cover note regarding a duplicate pump scheme proposal from the Norman Engineering Co. | 14th Sep 1938 | Box 122 \ 4 scan0184 | |
| Proposal from Norman Engineering Company for a 'Nash Hytor' Vacuum Pump for the Experimental Department. | 5th Sep 1938 | Box 122 \ 4 scan0185 | |
| Blueprint for the arrangement of a Size L.6 Nash Hytor Vacuum Pump. | 2nd Jun 1937 | Box 122 \ 4 scan0186 | |
| Request to loan a Terraplane 6 induction system with carburetter for 3 days to allow a dimensioned sketch to be made. | 20th Sep 1938 | Box 122 \ 4 scan0187 | |
| Letter from Thomson & Taylor regarding the fuel consumption of a 21 HP Terraplane 6 and offering services. | 20th Sep 1938 | Box 122 \ 4 scan0188 | |
| Letter discussing the advantage of an aerodrome depot for engine overhauls and the absence of Mr. Railton. | 23th Sep 1938 | Box 122 \ 4 scan0189 | |
| Letter to K.J. Thomson of Thomson & Taylor regarding a head-cum-induction system and congratulating them on a performance by John Cobb. | 23th Sep 1938 | Box 122 \ 4 scan0190 | |
| Poor value for money regarding special items demanded on the Stromberg carburetter. | 4th Oct 1938 | Box 122 \ 4 scan0191 | |
| The supply, stock, and pricing of Stromberg carburetters. | 4th Oct 1938 | Box 122 \ 4 scan0192 | |
| List of required modifications and points to consider for a new engine component drawing, referencing the Wraith, Bentley, and Humber 'Snipe' models. | 4th Oct 1938 | Box 122 \ 4 scan0193 | |
| Proposal to test different carburetter bodies and their associated starting mechanisms. | 4th Oct 1938 | Box 122 \ 4 scan0194 | |
| Page discussing warm engine starting conditions and the finalization of carburetter specifications. | 4th Oct 1938 | Box 122 \ 4 scan0195 | |
| Requesting tests on the S.U. carburetter solenoid's current consumption and low voltage performance. | 10th Oct 1938 | Box 122 \ 4 scan0196 | |
| Letter from Gordon Equipments Ltd introducing their L.P. Exhaust Gas Analyzer. | 25th Oct 1938 | Box 122 \ 4 scan0197 | |
| Operating instructions leaflet for an exhaust gas analyzer and for correcting the carburettor. | 25th Sep 1935 | Box 122 \ 4 scan0198 | |
| Explaining correct carburation through exhaust gas analysis, featuring a combustion chart and a table of gas equivalents. | 25th Sep 1935 | Box 122 \ 4 scan0199 | |
| The fitting of a Duplex Stromberg Carburetter to the Wraith model. | 28th Oct 1938 | Box 122 \ 4 scan0200 | |
| Performance differences between Bentley and Wraith induction systems. | 28th Oct 1938 | Box 122 \ 4 scan0201 | |
| Comparative tests on the Wraith 28.G.VI using a standard Wraith induction system versus a Bentley III induction system. | 31th Oct 1938 | Box 122 \ 4 scan0202 | |
| Performance comparison tables for the Wraith and Bentley III systems, including acceleration and hill climb data. | 31th Oct 1938 | Box 122 \ 4 scan0203 | |
| Carburetter performance tests, comparing speed, petrol consumption, and other improvements between different systems and needle types. | 31th Oct 1938 | Box 122 \ 4 scan0204 | |
| Engine idling, low-speed roughness, and an unsuccessful cold start test on a Bentley III system. | 31th Oct 1938 | Box 122 \ 4 scan0205 | |
| Performance and acceleration comparison graph for the B III and Wraith systems. | 31th Oct 1938 | Box 122 \ 4 scan0206 | |
| Graph comparing the power output of a B III induction system against a Wraith induction system under specific engine conditions. | 29th Oct 1938 | Box 122 \ 4 scan0207 | |
| Alterations to the induction system and carburettors for improved fuel economy between B.II and B.III models. | 29th Oct 1938 | Box 122 \ 4 scan0208 | |
| Petrol consumption tests for various Bentley III car configurations. | 29th Oct 1938 | Box 122 \ 4 scan0209 | |
| Table of results from fuel consumption tests comparing two vehicle models with different carburettor and wheel setups. | 29th Oct 1938 | Box 122 \ 4 scan0210 | |
| Constant speed consumption tests for Bentley III carburettors using different needle and jet tube assemblies. | 29th Oct 1938 | Box 122 \ 4 scan0211 | |
| Cold starting difficulties with a 'Startex' carburetter at 6°F. | 29th Oct 1938 | Box 122 \ 4 scan0212 | |
| Graph plotting constant speed petrol consumption in miles per gallon against miles per hour for the 7BV model. | 14th Nov 1938 | Box 122 \ 4 scan0213 | |
| Letter from Thomson & Taylor apologising for a delay and responding to a query about a Hudson 6 head-cum-induction system. | 14th Nov 1938 | Box 122 \ 4 scan0214 | |
| Test report on the operating voltage and current consumption of an automatic solenoid choke control. | 29th Nov 1938 | Box 122 \ 4 scan0215 | |
| Engine power figures related to exhaust and induction system modifications for a Paulin Bentley. | 13th Jan 1939 | Box 122 \ 4 scan0216 | |
| Performance of induction and exhaust systems, and proposed detonation tests for Bentley models. | 13th Jan 1939 | Box 122 \ 4 scan0217 | |
| Carburation, induction systems, and exhaust effects on engine performance. | 16th Jan 1939 | Box 122 \ 4 scan0218 | |
| Testing cylinder bores by sending a block to Rovers for chromium plating. | 16th Jan 1939 | Box 122 \ 4 scan0219 | |
| Development challenges with an automatic starting device, including 'freezing up' and performance issues. | 21th Mar 1939 | Box 122 \ 4 scan0220 | |
| Comparison of the S.U. manufacturer's recommended settings for a starting device versus Rolls-Royce's own method. | 21th Mar 1939 | Box 122 \ 4 scan0221 | |
| Analysis of S.U. carburettor starting methods and a proposed combined mixture/throttle control linkage. | 21th Mar 1939 | Box 122 \ 4 scan0222 | |
| The impracticality of a 'fast idle' device when a hand throttle is required for steep gradients. | 21th Mar 1939 | Box 122 \ 4 scan0223 | |
| Graph comparing constant speed petrol consumption for various induction systems and car models. | 25th Mar 1939 | Box 122 \ 4 scan0224 | |
| Article discussing the power gains achievable by 'ramming' an engine's air intake. | 25th Mar 1939 | Box 122 \ 4 scan0225 | |
| Article on engine ramming effect and the Bristol Perseus X engine, with an advertisement for 'dag' colloidal graphite. | 25th Mar 1939 | Box 122 \ 4 scan0226 | |
| Article on the Berlin Motor Show alongside an advertisement for Durez plastic ignition components. | 25th Mar 1939 | Box 122 \ 4 scan0227 | |
| Carburation development for new six and eight-cylinder engines and scheduling a meeting to improve processes. | 1st Jun 1939 | Box 122 \ 4 scan0228 | |
| Outlining the order of urgency for development work on carburetter and induction systems. | 2nd Jun 1939 | Box 122 \ 4 scan0229 | |
| Outlining responsibilities for carburetter testing, coordination of results, and collaboration with Vauxhalls. | 2nd Jun 1939 | Box 122 \ 4 scan0230 | |
| Modifying induction pipes by inserting sheet lead into the core box to reduce the bore size. | 12th Jun 1939 | Box 122 \ 4 scan0231 | |
| Outlining a suggested programme of tests for carburation systems and components. | 14th Jun 1939 | Box 122 \ 4 scan0232 | |
| Comparison of the Standard B.V., Standard Wraith, and new Duplex systems for performance and fuel economy. | 14th Jun 1939 | Box 122 \ 4 scan0233 | |
| Unvapourised fuel surging in the Induction System B.80 No.5 Unit. | 28th Jun 1939 | Box 122 \ 4 scan0234 | |
| Design of induction pipes and manifolds for carburettors to improve heating at low speeds. | 28th Jun 1939 | Box 122 \ 4 scan0235 | |
| Production of 6 and 8 cylinder engine castings and the induction pipe for a B.80 engine. | 28th Jun 1939 | Box 122 \ 4 scan0236 | |
| Incorrect drawings for carburetter specifications sent to the S.U. Co. | 18th Jul 1939 | Box 123 \ 1 scan0001 | |
| Production trial for an automatic start device for a 6-cylinder engine. | 23th Aug 1939 | Box 123 \ 1 scan0002 | |
| Advantages and disadvantages of an electrically operated automatic choke for a Stromberg carburetter. | 23th Aug 1939 | Box 123 \ 1 scan0003 | |
| Comparison of external and internal fast idle systems for an engine's electrical choke unit. | 23th Aug 1939 | Box 123 \ 1 scan0004 | |
| Two methods for the automatic starting system on an 8-cylinder engine. | 30th Aug 1939 | Box 123 \ 1 scan0005 | |
| Outlining proposed comparison tests for different induction systems on 6-cylinder engines. | 31th Oct 1939 | Box 123 \ 1 scan0006 | |
| Experiments on induction systems for future development engines. | 15th Dec 1939 | Box 123 \ 1 scan0007 | |
| Requesting the production of two further induction pipes following a successful trial. | 18th Dec 1939 | Box 123 \ 1 scan0008 | |
| Policy and test results for induction systems on Bentley and R.R. products. | 27th Dec 1939 | Box 123 \ 1 scan0009 | |
| Report comparing performance and petrol consumption for Twin S.U. and Duplex Stromberg carburettors on a B.60 No.4 engine. | 27th Dec 1939 | Box 123 \ 1 scan0010 | |
| Performance and fuel consumption comparison of carburettor and exhaust systems on a 124ccs capacity engine. | 27th Dec 1939 | Box 123 \ 1 scan0011 | |
| Page stating the weight of a twin system and a single system. | 27th Dec 1939 | Box 123 \ 1 scan0012 | |
| Power comparison chart for single and twin exhaust systems on a B60 N°3 Unit Chain Drive. | 5th Dec 1939 | Box 123 \ 1 scan0013 | |
| Power curve graph comparing engine performance with different pipe and carburettor setups. | 24th May 1939 | Box 123 \ 1 scan0014 | |
| Letter to Henry Wiggin & Co. Ltd. inquiring about the feasibility of manufacturing specific coiled bimetal strips. | 11th Jan 1940 | Box 123 \ 1 scan0015 | |
| Letter discussing carburation systems and the choice between exhaust or water heating. | 19th Jan 1940 | Box 123 \ 1 scan0016 | |
| Carburation issues, including water-heated versus exhaust-heated hot spots and ignition. | 22th Jan 1940 | Box 123 \ 1 scan0017 | |
| Carburation, hot air intakes, and a comparison between S.U. and Stromberg carburettors in cold weather. | 22th Jan 1940 | Box 123 \ 1 scan0018 | |
| Technical report analyzing the effects of hot and cold air intake on carburettor performance and mixture temperature. | 22th Jan 1940 | Box 123 \ 1 scan0019 | |
| Carburettor settings for 8-cylinder and Ripple engines, detailing issues in cold weather and the proposed solution of using heated induction pipes. | 22th Jan 1940 | Box 123 \ 1 scan0020 | |
| Request to place an order with Allen White for the manufacture and fitting of two metal hot spot casings onto an induction pipe. | 26th Jan 1940 | Box 123 \ 1 scan0021 | |
| Meeting notes detailing actions for carburettor adjustments and plug testing on various vehicles. | 31th Jan 1940 | Box 123 \ 1 scan0022 | |
| Issues and solutions for transport cars, coils, and various carburetter systems. | 1st Feb 1940 | Box 123 \ 1 scan0023 | |
| Meeting notes discussing automatic choke control, carburetter drain pipes, 8-cylinder engines, and air silencers. | 1st Feb 1940 | Box 123 \ 1 scan0024 | |
| Note on the decision for a positive earth electrical system for the Ripplet and a request to investigate freezing brakes. | 1st Feb 1940 | Box 123 \ 1 scan0025 | |
| Re-consideration of drain pipes on S.U. and Duplex Stromberg carburettors for a new series of engines. | 15th Feb 1940 | Box 123 \ 1 scan0026 | |
| Development and alterations of the Stromberg twin-choke carburettor. | 19th Feb 1940 | Box 123 \ 1 scan0027 | |
| Technical memorandum discussing carburettor design including the starting choke, controls, and petrol filter. | 19th Feb 1940 | Box 123 \ 1 scan0028 | |
| Design notes on the float chamber, needle seating, and external finish for a carburettor. | 19th Feb 1940 | Box 123 \ 1 scan0029 | |
| Letter to Zenith Carburetter Co. Ltd. discussing needle seat diameter and pressure for the A.A. 25 carburetter. | 20th Jul 1939 | Box 123 \ 1 scan0030 | |
| Letter detailing pressure and load calculations for a carburetter needle and seat arrangement. | 20th Jul 1939 | Box 123 \ 1 scan0031 | |
| Issues and improvements regarding sticking choke spindles on Stromberg carburettors. | 19th Feb 1940 | Box 123 \ 1 scan0032 | |
| Summary report on the Bentley V. S.W. Startex Carburetter, detailing its disadvantages and proposed schemes to fix them. | 21th Feb 1940 | Box 123 \ 1 scan0033 | |
| The major disadvantages, specifically freezing issues, of fitting the S.U. Startex carburettor. | 21th Feb 1940 | Box 123 \ 1 scan0034 | |
| Modifications and solutions for carburettor icing issues on starter units. | 1st Jan 1940 | Box 123 \ 1 scan0035 | |
| Carburettor freezing, fuel distribution issues, and potential solutions for cold starting problems. | 21th Feb 1940 | Box 123 \ 1 scan0036 | |
| Plug tests on transport cars following carburettor modifications for fuel economy. | 29th Feb 1940 | Box 123 \ 1 scan0037 | |
| Development and modification of an automatic choke system for carburetors. | 5th Mar 1940 | Box 123 \ 1 scan0038 | |
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