| Description | Date | Identifier | |
| Requesting the casting and modification of a high power cylinder head for a six-cylinder engine. | 24th Apr 1935 | Box 133 \ 2 scan0145 | |
| Instruction to manufacture a modified Bentley Universal Unit with a crankshaft extension for test bed mounting. | 28th May 1935 | Box 133 \ 2 scan0146 | |
| Experimental department report on a 500 c.c. Rudge Air/Cooled Engine. | 14th Jun 1935 | Box 133 \ 2 scan0147 | |
| Test report on a 500 c.c. Rudge engine covering performance, mechanical issues, and running time. | 14th Jun 1935 | Box 133 \ 2 scan0148 | |
| Detailed report on engine constructional details and specifications. | 14th May 1936 | Box 133 \ 2 scan0149 | |
| Engine performance tests, focusing on power output and cooling. | 14th Jun 1935 | Box 133 \ 2 scan0150 | |
| Engine tests covering detonation, valve timing, and piston seizures. | 14th Jun 1935 | Box 133 \ 2 scan0151 | |
| Engine testing issues including excessive vibration, starting difficulties, and a fractured crankshaft. | 14th Jun 1935 | Box 133 \ 2 scan0152 | |
| Blueprint graph showing valve lift diagrams for both inlet and exhaust from 500cc Rudge tests. | 14th Jun 1935 | Box 133 \ 2 scan0153 | |
| Power and consumption curves from a 500cc Rudge engine test. | 20th Jun 1935 | Box 133 \ 2 scan0154 | |
| Design, valving, and port arrangement of sleeve valve car engines. | 20th Jun 1935 | Box 133 \ 2 scan0155 | |
| Comparison of valve and port area specifications for various engines, with a subsequent analysis on inlet valving. | 20th Jun 1935 | Box 133 \ 2 scan0156 | |
| Technical report discussing engine length and sleeve balance considerations for 6 and 8-cylinder engines. | 20th Jun 1935 | Box 133 \ 2 scan0157 | |
| Sleeve drive torque, including friction, inertia, and potential rattles in worm gears. | 20th Jun 1935 | Box 133 \ 2 scan0158 | |
| Graph comparing the valve areas of sleeve versus poppet valves for a 3.500 bore engine. | 20th Jun 1935 | Box 133 \ 2 scan0159 | |
| Blueprint comparing the cylinder block lengths of the Wraith, TSN's, and a Sleeve Valve engine. | 20th Jun 1935 | Box 133 \ 2 scan0160 | |
| Comparison drawing of a 6 Cylinder 3.5 Bore Sleeve Valve engine and a Big Bore Bentley engine. | 2nd Jul 1935 | Box 133 \ 2 scan0161 | |
| Report estimating the variations in tappet clearance for an overhead camshaft engine due to temperature effects, comparing a Standard Head and a Ramp Head. | 2nd Jul 1935 | Box 133 \ 2 scan0162 | |
| Cam and rocker head differences and proposals for quietening tappets on the Spectre engine. | 2nd Jul 1935 | Box 133 \ 2 scan0163 | |
| Variation in tappet clearance for overhead camshaft engines due to temperature effects. | 4th Jul 1935 | Box 133 \ 2 scan0164 | |
| Graphs showing ignition advance against compression ratio and engine speed for a turbulent head engine. | 1st Jul 1932 | Box 133 \ 2 scan0165 | |
| Technical memorandum discussing the design and valving arrangements of sleeve valve car engines. | 20th Jun 1935 | Box 133 \ 2 scan0166 | |
| Comparison of valve and piston areas for various engine models. | 20th Jun 1935 | Box 133 \ 2 scan0167 | |
| Page discussing engine length and sleeve balance calculations for multi-cylinder engines. | 20th Jun 1935 | Box 133 \ 2 scan0168 | |
| The torque characteristics of a sleeve drive, including friction, inertia, and potential issues. | 20th Jun 1935 | Box 133 \ 2 scan0169 | |
| Graph comparing the valve areas of Sleeve and Poppet valves for a 3.500 bore engine. | 14th Apr 1936 | Box 133 \ 2 scan0170 | |
| Blueprint comparing the cylinder block dimensions of a 6-cylinder Sleeve Valve engine with a Big Bore Bentley engine. | 14th Apr 1936 | Box 133 \ 2 scan0171 | |
| Blueprint comparing an 8-cylinder Sleeve Valve engine with the Wraith and TSN's engines. | 29th Jun 1935 | Box 133 \ 2 scan0172 | |
| Out-of-balance couple caused by sleeve valves in a 12-cylinder 'Double-Six' engine. | 29th Jun 1935 | Box 133 \ 2 scan0173 | |
| Variation in tappet clearance for overhead camshaft engines due to temperature effects. | 4th Jul 1935 | Box 133 \ 2 scan0174 | |
| Outlining the agreed procedure for Bentley single cylinder unit and engine head development. | 16th Sep 1935 | Box 133 \ 2 scan0175 | |
| Typed document detailing design investigations and tests for engine cylinder heads. | 16th Sep 1935 | Box 133 \ 2 scan0176 | |
| Design considerations for a Straight '8' Engine, including big-end area and construction. | 23th Sep 1935 | Box 133 \ 2 scan0177 | |
| Letter from Norton Motors to Mr. Robotham asking for information on Rolls-Bentley silencing arrangements. | 30th Oct 1935 | Box 133 \ 2 scan0178 | |
| Pros and cons of belt-driven versus gear-driven dynamos for various car engines. | 5th Nov 1935 | Box 133 \ 2 scan0179 | |
| Pros and cons of belt drives versus chain drives for engine auxiliaries. | 9th Nov 1935 | Box 133 \ 2 scan0180 | |
| The Rudge-Whitworth unit, comparing the performance of a new camshaft against the original. | 9th Nov 1935 | Box 133 \ 2 scan0181 | |
| Valve lift diagrams for a 500cc Rudge Unit, comparing modified and standard camshafts. | 2nd Oct 1946 | Box 133 \ 2 scan0182 | |
| Graph showing power variations and B.M.E.P. of a 500cc Rudge unit with various exhaust systems against R.P.M. | 8th Nov 1935 | Box 133 \ 2 scan0183 | |
| Comparative graph of Mean Effective Pressure (MEP) curves for Rudge and HP cylinder heads. | 9th Nov 1935 | Box 133 \ 2 scan0184 | |
| Letter to Norton Motors Ltd. proposing to purchase a racing unit for single cylinder tests and to discuss silencing problems. | 13th Nov 1935 | Box 133 \ 2 scan0185 | |
| Letter from Norton Motors Ltd. acknowledging receipt of a communication. | 15th Nov 1935 | Box 133 \ 2 scan0186 | |
| Letter from Norton Motors Ltd. about supplying a racing engine and arranging a meeting to discuss the matter further. | 26th Nov 1935 | Box 133 \ 2 scan0187 | |
| Minutes of a meeting held on 25th November 1935 to review single-cylinder car engine work. | 29th Nov 1935 | Box 133 \ 2 scan0188 | |
| Meeting notes regarding the design of a side valve head for the Bentley Universal Unit. | 29th Nov 1935 | Box 133 \ 2 scan0189 | |
| Minutes of a meeting regarding single-cylinder engine work and testing procedures. | 29th Nov 1935 | Box 133 \ 2 scan0190 | |
| Despatch note for returning Mr. Kaster's property, a box of model pieces for a slide valve engine, after examination. | 29th Nov 1935 | Box 133 \ 2 scan0191 | |
| Letter from the Experimental Department regarding the design and specifications of a slide valve engine. | 29th Nov 1935 | Box 133 \ 2 scan0192 | |
| Letter to Norton Motors Ltd. confirming potential dates for a visit from Mr. C.C. Skinner. | 30th Nov 1935 | Box 133 \ 2 scan0193 | |
| Letter from Norton Motors Ltd. acknowledging a communication and advising that Mr. C.G. Smith will attend to it upon his return from the Cycle & Motor Cycle Show at Olympia. | 2nd Dec 1935 | Box 133 \ 2 scan0194 | |
| Letter from Norton Motors Ltd. confirming the supply of a 500cc engine and proposing a technical information exchange. | 18th Dec 1935 | Box 133 \ 2 scan0195 | |
| Letter from Norton Motors Ltd. discussing confidentiality and arrangements for engine testing. | 18th Dec 1935 | Box 133 \ 2 scan0196 | |
| New O.H.C. single cylinder unit for testing, detailing its construction and referencing attached schematics. | 28th Dec 1935 | Box 133 \ 2 scan0197 | |
| Inquiry to General Motors Research Dept. in Detroit regarding a two-stroke diesel unit. | 1st Jun 1938 | Box 133 \ 3 scan0001 | |
| Letter from General Motors regarding an inquiry about a 460 cubic inch two-stroke diesel unit. | 3rd Jun 1938 | Box 133 \ 3 scan0002 | |
| Letter to W.J. Davidson of General Motors requesting information on an exportable engine. | 14th Jun 1938 | Box 133 \ 3 scan0003 | |
| Cover note for an attached letter from W.J. Davidson of General Motors regarding outside orders. | 14th Jun 1938 | Box 133 \ 3 scan0004 | |
| Letter to W.J. Davidson of General Motors regarding a visit from Dr. Llewellyn Smith to enquire about a provisionally ordered Diesel engine. | 27th Aug 1938 | Box 133 \ 3 scan0005 | |
| Requesting to cable General Motors for an order of a diesel engine for research purposes. | 10th Oct 1938 | Box 133 \ 3 scan0006 | |
| Letter from General Motors Sales Corporation regarding the shipment of a Model 6-71 G-M Diesel engine. | 11th Oct 1938 | Box 133 \ 3 scan0007 | |
| Letter from Vosper Ltd discussing the possibility of using an 8 cylinder engine and the 'Phantom 3' for a project. | 24th Oct 1938 | Box 133 \ 3 scan0008 | |
| Letter to Lt.Comdr. P. Du Cane of Vosper Ltd. regarding an outline drawing for an engine. | 25th Oct 1938 | Box 133 \ 3 scan0009 | |
| The shipment of a diesel engine from General Motors and the applicable import duty. | 1st Nov 1938 | Box 133 \ 3 scan0010 | |
| Confirming a 20% aero engine duty for a diesel engine following a telephone conversation. | 4th Nov 1938 | Box 133 \ 3 scan0011 | |
| Letter to Lt. Comdr. Du Cane of Vosper Ltd. enclosing an outline drawing of an 8-cylinder engine. | 10th Nov 1938 | Box 133 \ 3 scan0012 | |
| Request from Vosper Ltd for performance data on an 8-cylinder engine. | 17th Nov 1938 | Box 133 \ 3 scan0013 | |
| Letter responding to queries about engine specifications, power ratings, and consumption for marine purposes. | 18th Nov 1938 | Box 133 \ 3 scan0014 | |
| Secret memo discussing the development and supply of marine engine units for Commander Du Cane of Vospers. | 1st Dec 1938 | Box 133 \ 3 scan0015 | |
| Confirming a job can be handled by marking drawings 'Rolls-Royce Marine Unit'. | 1st Dec 1938 | Box 133 \ 3 scan0016 | |
| Article from 'Automotive Industries' magazine detailing the Dodge six-cylinder, four-stroke Diesel engine. | 3rd Dec 1938 | Box 133 \ 3 scan0017 | |
| Article page discussing competition, government regulation, and the structure of the American oil industry. | 3rd Dec 1938 | Box 133 \ 3 scan0018 | |
| Article from 'Automotive Industries' detailing the features and performance of a Diesel engine for a 3-ton Dodge vehicle. | 3rd Dec 1938 | Box 133 \ 3 scan0019 | |
| Article discussing a swashplate-operated injection pump for a Diesel Dodge Truck, with an advertisement for Timken tubing from Ryerson Steels. | 1st Dec 1938 | Box 133 \ 3 scan0020 | |
| Letter from Vosper Ltd proposing the installation of two petrol engines into a pre-built hull for demonstration purposes. | 7th Dec 1938 | Box 133 \ 3 scan0021 | |
| Letter to Commander Du Cane of Vosper Ltd. regarding a proposition and promising a decision. | 7th Dec 1938 | Box 133 \ 3 scan0022 | |
| Letter regarding customs clearance for a General Motors diesel engine and the required declaration of use. | 5th Jan 1939 | Box 133 \ 3 scan0023 | |
| Clarifying the use of a General Motors Diesel engine for stationary research purposes only. | 6th Jan 1939 | Box 133 \ 3 scan0024 | |
| Blueprint of an 8-cylinder engine showing multiple views and details of the engine mounting. | 9th Nov 1938 | Box 133 \ 3 scan0025 | |
| Specification and price sheet for Morris 'Vedette' Mark II petrol and paraffin marine engines. | 1st Jan 1935 | Box 133 \ 3 scan0026 | |
| Sales and specification sheet for the Morris 'Commodore' and 'Navigator' marine engines. | 8th Feb 1939 | Box 133 \ 3 scan0027 | |
| Letter to Vosper Ltd. regarding progress on a marine power plant and fuel quality issues for its diesel version. | 8th Feb 1939 | Box 133 \ 3 scan0028 | |
| Diesel engine performance, referencing Leyland engines' characteristics and concluding on the fuel economy of direct injection. | 22th Feb 1939 | Box 133 \ 3 scan0029 | |
| Letter to C.D. Robinson of The Associated Equipment Co., Ltd. regarding a meeting and research into diesel and petrol engines. | 23th Feb 1939 | Box 133 \ 3 scan0030 | |
| Letter to H.R. Ricardo arranging a meeting to discuss direct injection and ante-chamber diesels. | 23th Feb 1939 | Box 133 \ 3 scan0031 | |
| Letter from Associated Equipment Co Ltd discussing their 7.7-litre heavy oil engine, crankshaft hardening costs, and providing related drawings. | 25th Feb 1939 | Box 133 \ 3 scan0032 | |
| Summary of previous work and the current status of a 4-stroke diesel engine project. | 25th Feb 1939 | Box 133 \ 3 scan0033 | |
| Performance report for a small Compression Ignition (C.I.) engine unit. | 25th Feb 1939 | Box 133 \ 3 scan0034 | |
| Engine testing, covering fuel injection rates, swirl effects, fuel pump suction line issues, and mechanical failures. | 25th Feb 1939 | Box 133 \ 3 scan0035 | |
| Technical memorandum comparing anti-chamber and direct injection compression ignition engines. | 27th Feb 1939 | Box 133 \ 3 scan0036 | |
| Comparative analysis of engine design features and issues from various manufacturers. | 27th Feb 1939 | Box 133 \ 3 scan0037 | |
| Pneumatic governors, engine preference for luxury coaches, and competitor intelligence. | 27th Feb 1939 | Box 133 \ 3 scan0038 | |
| Cover memo for a summary report on a 4-stroke diesel engine contract run. | 28th Feb 1939 | Box 133 \ 3 scan0039 | |
| Summary of the first 100 hours of contract running on a C.I. 4-stroke unit. | 28th Feb 1939 | Box 133 \ 3 scan0040 | |
| Engine test conclusions, unit specifications, and test conditions. | 28th Feb 1939 | Box 133 \ 3 scan0041 | |
| The development and testing of fuel injector nozzles under various conditions. | 28th Feb 1939 | Box 133 \ 3 scan0042 | |
| Fuel leakage, fuel line capacity, and methods for inducing rotational air swirl in an engine. | 28th Feb 1939 | Box 133 \ 3 scan0043 | |
| Tests concerning rotational air swirl, valve timing, and injection timing and duration. | 28th Feb 1939 | Box 133 \ 3 scan0044 | |
| Technical document detailing injection pressure and mechanical efficiency analysis. | 28th Feb 1939 | Box 133 \ 3 scan0045 | |
| Engine fuel consumption, injection advance, supercharging, and mechanical failures. | 28th Feb 1939 | Box 133 \ 3 scan0046 | |
| Mechanical failures of alloys and gudgeon pins, with a table of standard performance figures. | 28th Feb 1939 | Box 133 \ 3 scan0047 | |
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