| Description | Date | Identifier | |
| Graph plotting Autovac petrol delivery against engine RPM, comparing standard and 3/8' pipe sizes. | 13th Jun 1927 | Box 69 \ 4 scan0335 | |
| Graph showing the effect of petrol pipe size on Autovac petrol delivery at half throttle, plotted against engine RPM. | 13th Jun 1927 | Box 69 \ 4 scan0336 | |
| The performance tests of the 10-EX car at Brooklands, comparing it to a standard 40/50 touring car. | 6th Sep 1927 | Box 69 \ 4 scan0337 | |
| Vehicle speed trials, performance limitations due to valve bounce, and proposals for further tests. | 6th Sep 1927 | Box 69 \ 4 scan0338 | |
| General remarks on the performance of the 10-EX car, covering suspension, steering, and the Autovac system. | 6th Sep 1927 | Box 69 \ 4 scan0339 | |
| Performance comparison of Sports and Standard Touring Phantom chassis 10-EX & 46-PK. | 6th Sep 1927 | Box 69 \ 4 scan0340 | |
| Table showing car speed tests under various configurations. | 7th Sep 1927 | Box 69 \ 4 scan0341 | |
| Bar chart showing the gain or loss in lap speed (M.P.H.) for the 10 E.X. model under various conditions. | 7th Sep 1927 | Box 69 \ 4 scan0342 | |
| Performance graph of an aluminum engine with a long duration camshaft and turbulent head, showing BHP vs RPM and various power loss/gain calculations. | 7th Sep 1927 | Box 69 \ 4 scan0343 | |
| List of required improvements and specifications for the Sports Phantom engine and car. | 9th Oct 1927 | Box 69 \ 4 scan0344 | |
| Required improvements for the Sports Phantom Engine and associated car before production. | 1st Sep 1927 | Box 69 \ 4 scan0345 | |
| Brooklands track tests comparing a 17-tooth axle with a 16-tooth axle, noting poor weather and issues with a Claudel carburetter. | 13th Sep 1927 | Box 69 \ 4 scan0346 | |
| Test report summarising the effects of balloon tyres and modifications to valve springs and crankcase bolts. | 13th Sep 1927 | Box 69 \ 4 scan0347 | |
| The effects of various vehicle modifications on speed. | 8th Sep 1927 | Box 69 \ 4 scan0348 | |
| Record of speed tests conducted at Brooklands, showing the impact of various car modifications on lap times. | 8th Sep 1927 | Box 69 \ 4 scan0349 | |
| Bar chart illustrating the gain or loss in speed resulting from various vehicle alterations during tests at Brooklands. | 8th Sep 1927 | Box 69 \ 4 scan0350 | |
| Proposal to introduce a new graded scheme for chassis power tests based on engine RPM. | 28th Sep 1927 | Box 69 \ 4 scan0351 | |
| Arguing against higher geared rear axle ratios to improve low-speed performance and acceleration, particularly for the Australian market. | 11th Oct 1927 | Box 69 \ 4 scan0352 | |
| Engine performance, gearing ratios, and suitability for Australian conditions. | 17th Oct 1927 | Box 69 \ 4 scan0353 | |
| Analysis of the factors controlling the limiting oil temperature on F.XI engines. | 17th Oct 1927 | Box 69 \ 4 scan0354 | |
| Technical analysis of heat distribution and friction losses in a 6-cylinder engine unit. | 17th Oct 1927 | Box 69 \ 4 scan0355 | |
| Analysis of engine tests varying oil discharge to study its effects on heat dissipation from bearings and pistons. | 17th Oct 1927 | Box 69 \ 4 scan0356 | |
| Continued report on experiments concerning engine oil temperature, circulation, and the effects of compression ratios on pistons. | 19th Oct 1927 | Box 69 \ 4 scan0357 | |
| Supplement to a report on oil temperature, clarifying friction losses and heat transfer experiments on a Phantom engine. | 19th Oct 1927 | Box 69 \ 4 scan0358 | |
| Analysis of heat loss from the crankcase and the effect of reduced oil flow on engine temperatures. | 19th Oct 1927 | Box 69 \ 4 scan0359 | |
| Energy diagram for a 40-50 HP engine with a 3.9 compression ratio, plotting energy percentage against R.P.M. | 19th Oct 1927 | Box 69 \ 4 scan0360 | |
| Table of test results showing the effect of oil flow on temperature and heat given to oil. | 17th Oct 1927 | Box 69 \ 4 scan0361 | |
| Sankey diagram illustrating the heat distribution and energy losses for a 6-cylinder FXI engine. | 17th Oct 1927 | Box 69 \ 4 scan0362 | |
| Methods to improve the high-speed performance of the Phantom model through body modifications. | 27th Oct 1927 | Box 69 \ 4 scan0363 | |
| Chart detailing potential speed increases from various modifications to a large 100hp touring car. | 24th Nov 1927 | Box 69 \ 4 scan0364 | |
| Analysing carburettor test results concerning maintaining power at high speeds for the Sports Phantom engine. | 24th Nov 1927 | Box 69 \ 4 scan0365 | |
| Comparison of gas velocities and valve timing experiments on 20 HP, Lorraine, and Phantom engines. | 24th Nov 1927 | Box 69 \ 4 scan0366 | |
| Camshaft experiments and factors required for high power maintenance at high rotative speeds. | 25th Nov 1924 | Box 69 \ 4 scan0367 | |
| Graph showing the power increase on a Phantom engine due to a low depression carburettor. | 25th Nov 1924 | Box 69 \ 4 scan0368 | |
| Graph showing the estimated power increase against reduced induction pipe depression for a standard Phantom carburettor at 2750 RPM. | 25th Nov 1924 | Box 69 \ 4 scan0369 | |
| Graph comparing gas velocity past valves against engine RPM for various models. | 26th May 1927 | Box 69 \ 4 scan0370 | |
| Graph from 20 HP experiments showing the effect of large valves and long duration cams on power output. | 26th May 1927 | Box 69 \ 4 scan0371 | |
| Phantom camshaft experiments comparing standard vs long duration camshafts on engine performance and valve timing. | 21th Jan 1927 | Box 69 \ 4 scan0372 | |
| Phantom power development, outlining proposed modifications to increase engine horsepower. | 28th Nov 1927 | Box 69 \ 4 scan0373 | |
| Comparing the performance of the 'Continental' Phantom against the standard car model. | 23th Feb 1928 | Box 69 \ 4 scan0374 | |
| Sports car performance, customer expectations, and a comparison with competing models. | 23th Feb 1928 | Box 69 \ 4 scan0375 | |
| Performance comparison of the Continental Phantom against other cars and a discussion on its design. | 23th Feb 1928 | Box 69 \ 4 scan0376 | |
| The advantages of a new rear-end design for fast cars, mentioning performance, stability, and practicality. | 23th Feb 1928 | Box 69 \ 4 scan0377 | |
| Performance graph showing the estimated power output of a Phantom engine against RPM at a 4.6 to 1 compression ratio. | 23th Feb 1928 | Box 69 \ 4 scan0378 | |
| Graph comparing the acceleration of Standard versus Continental Phantom models. | 23th Feb 1928 | Box 69 \ 4 scan0379 | |
| Performance graph comparing car speed against time for Standard and Continental models. | 15th Feb 1926 | Box 69 \ 4 scan0380 | |
| Performance comparison graph for Standard and Sports Phantom engines. | 15th Feb 1926 | Box 69 \ 4 scan0381 | |
| Proposed new minimum line curves for the 'New Phantom Horse Power' on the dynamometer. | 6th Jul 1928 | Box 69 \ 4 scan0382 | |
| Performance graph showing engine Horsepower (HP) versus Revolutions Per Minute (R.P.M.) for different test conditions. | 6th Jul 1928 | Box 69 \ 4 scan0383 | |
| Graph comparing engine RPM against lift in pounds for 3rd gear and top gear, showing average performance and proposed minimums. | 1st Aug 1928 | Box 69 \ 4 scan0384 | |
| Vehicle performance, including weights, power curves, and the relationship between horsepower, weight, and acceleration. | 1st Aug 1928 | Box 69 \ 4 scan0385 | |
| List of chassis weights for various 40/50 HP models, including the Silver Ghost and New Phantom. | 1st Aug 1928 | Box 69 \ 4 scan0386 | |
| Graph showing acceleration curves for the Phantom, Silver Ghost, and 20HP open touring cars. | 15th Aug 1928 | Box 69 \ 4 scan0387 | |
| Performance graph for a 20 HP flywheel clutch, including various chassis weight specifications. | 15th Aug 1928 | Box 69 \ 4 scan0388 | |
| Graph comparing the flywheel horsepower curves for the Phantom and Silver Ghost engines. | 24th Jul 1929 | Box 69 \ 4 scan0389 | |
| Defining the K.2 Series 40/50 HP Chassis, detailing chassis numbers and enclosing a manufacturing programme. | 24th Jul 1929 | Box 69 \ 4 scan0390 | |
| Blueprint for a revised E.A.C. II sports car with a Barker Sports Body. | 8th Dec 1925 | Box 70 \ 1 scan0001 | |
| Clarifying the specifications of a fitted dash, steering, and pedals, suggesting measurements be taken to resolve an issue. | 16th Feb 1931 | Box 70 \ 1 scan0002 | |
| Clarifying specifications for the Phantom I, 10-EX, regarding subframe, dashboard, steering, and axles. | 10th Feb 1931 | Box 70 \ 1 scan0003 | |
| Clarification on the specification for a Phantom I. 10-EX chassis due to partial records. | 12th Feb 1931 | Box 70 \ 1 scan0004 | |
| Responding to a query about car body modifications, specifically the dash position and steering column. | 12th Feb 1931 | Box 70 \ 1 scan0005 | |
| With queries about the dash and steering specifications for car 10.EX. | 12th Feb 1931 | Box 70 \ 1 scan0006 | |
| Requesting clarification on the experimental specifications for car 10-EX. | 5th Feb 1931 | Box 70 \ 1 scan0007 | |
| Requesting a chassis print and details of spring weight suitability for Messrs. Hooper. | 6th Feb 1931 | Box 70 \ 1 scan0008 | |
| Identifying chassis 10-EX as a 'W' series short chassis that corresponds with an attached coachbuilders blueprint. | 4th Feb 1931 | Box 70 \ 1 scan0009 | |
| Internal request for chassis particulars with a handwritten response detailing the specifications. | 2nd Feb 1931 | Box 70 \ 1 scan0010 | |
| Modifications for three standard F.2B series sports cars and referencing the 17-EX specification. | 16th Jan 1930 | Box 70 \ 1 scan0011 | |
| Instructions regarding modifications to chassis 10-EX to match previous sporting models. | 14th Jan 1930 | Box 70 \ 1 scan0012 | |
| Requesting information about alterations to Chassis 10-EX, specifically concerning three cars with sporting bodies and rounded backs. | 14th Jan 1930 | Box 70 \ 1 scan0013 | |
| Four options for handling Chassis 10-EX, which contains a large number of non-standard parts. | 19th Dec 1929 | Box 70 \ 1 scan0014 | |
| Experimental 10-EX car, its continuous modifications, and recommendations for standardizing certain parts. | 17th Dec 1929 | Box 70 \ 1 scan0015 | |
| Return of car 10-EX for repair work to make it fit for sale. | 10th Dec 1929 | Box 70 \ 1 scan0016 | |
| Request for a specification of non-standard parts for Chassis No. 10-EX after initial testing and examination. | 16th Dec 1929 | Box 70 \ 1 scan0017 | |
| Sale and required modifications for the 10-EX Sports Phantom car. | 16th Dec 1929 | Box 70 \ 1 scan0018 | |
| Letter from Hs. to Lappin regarding the allocation and use of the 10-EX car by the Aero Department. | 8th Nov 1929 | Box 70 \ 1 scan0019 | |
| Taking over a car for sale, the fitting of a new frame, and arranging a car for a lubrication scheme. | 14th Nov 1929 | Box 70 \ 1 scan0020 | |
| Private letter regarding uncertain arrangements for transporting Mr. Stevens to Derby in car 10-EX. | 12th Nov 1929 | Box 70 \ 1 scan0021 | |
| Sending chassis number 10-EX for inspection trials and experiments at the Works. | 15th Nov 1929 | Box 70 \ 1 scan0022 | |
| Potential issues with bonnet locks for the Phantom II and 10-EX chassis. | 10th Dec 1929 | Box 70 \ 1 scan0023 | |
| Clarifying the build year and specifications for chassis 10-EX. | 11th Dec 1929 | Box 70 \ 1 scan0024 | |
| Build and upgrade history for Chassis 10-EX. | 11th Dec 1929 | Box 70 \ 1 scan0025 | |
| Decision to sell the 10-EX car and the reallocation of planned experiments to other vehicles. | 8th Nov 1929 | Box 70 \ 1 scan0026 | |
| The unjustifiable expenditure of car '10-EX' for the Aero Department due to poor engine orders. | 5th Nov 1929 | Box 70 \ 1 scan0027 | |
| Potential sale of the experimental car 10-EX, and comparing it to a later version shown to the Prince of Wales. | 29th Oct 1929 | Box 70 \ 1 scan0028 | |
| Withdrawal of a 40/50 HP car and whether to sell it or keep the chassis for experimental use. | 8th Nov 1929 | Box 70 \ 1 scan0029 | |
| Potential buyer for an experimental car and querying the status of the 10-EX. | 28th Oct 1929 | Box 70 \ 1 scan0030 | |
| Typed memo regarding the replacement of a faulty petrol gauge and scheduling car maintenance for car 10-EX. | 17th Sep 1929 | Box 70 \ 1 scan0031 | |
| Timed tests for climbing Ticknall Hill using various gear change methods and vehicles. | 22th Aug 1929 | Box 70 \ 1 scan0032 | |
| Future use of experimental cars 10-EX and 10-G3. | 6th Mar 1929 | Box 70 \ 1 scan0033 | |
| Notification that repairs to the 10-EX car are almost complete and it will be ready for collection. | 21th Mar 1929 | Box 70 \ 1 scan0034 | |
| Performance curves from tests on the 10-EX car at Brooklands, comparing it to a standard Phantom. | 2nd Mar 1929 | Box 70 \ 1 scan0035 | |
| From A.J. Lidsey to W/S regarding the progress of the 10-EX vehicle. | 18th Mar 1929 | Box 70 \ 1 scan0036 | |
| Letter from 'Lp' to 'Hs' about a road trip in car 10-EX, detailing a petrol pipe failure and an engine overheating issue. | 23th Feb 1929 | Box 70 \ 1 scan0037 | |
| Accident involving the 10-EX car. | 20th Nov 1928 | Box 70 \ 1 scan0038 | |
| List of spares and accessories received with chassis 10EX. | 14th Nov 1928 | Box 70 \ 1 scan0039 | |
| Instructions for modifying the petrol gauge, shock absorbers, springs, and relay on the 10-EX car. | 26th Oct 1928 | Box 70 \ 1 scan0040 | |
| Clarifying that the experimental car 10-EX is being used for steering and suspension tests, not being developed as a speed car. | 5th Jul 1928 | Box 70 \ 1 scan0041 | |
| Test report comparing the steering and handling of a 6.5-litre Bentley with a Rolls-Royce 10-EX car. | 28th Jun 1928 | Box 70 \ 1 scan0042 | |
| Report comparing steering systems, focusing on column movement, wobbles, and flexibility between two different manufacturer's vehicles. | 28th Jun 1928 | Box 70 \ 1 scan0043 | |
| Performance and engineering assessment of a vehicle's major components. | 28th Jun 1928 | Box 70 \ 1 scan0044 | |
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