| Description | Date | Identifier | |
| Faults and benefits of 'Japan 3' fabric couplings on the Phantom II model. | 20th Apr 1931 | Morton \ M13.2 img043 | |
| Performance and issues of a new 25 HP integral crankcase and cylinder block. | 20th Apr 1931 | Morton \ M13.2 img044 | |
| Specification details for the Japan 1 second half 'T' series 25 HP cars, covering frames, crankshafts, and cylinders. | 8th May 1931 | Morton \ M13.2 img045 | |
| The status and proposed improvements for various vehicle components, including springs, axles, and brakes. | 8th May 1931 | Morton \ M13.2 img046 | |
| Testing a 'Japan' exhaust system to reduce noise while minimizing power loss on a 25 HP engine. | 9th May 1931 | Morton \ M13.2 img047 | |
| Table detailing the inside diameters and areas of Down Pipes and Fish Tail Pipes for 40/50 HP and 20 HP models. | 9th May 1931 | Morton \ M13.2 img048 | |
| Analysis of experimental results comparing a rigid construction method with American methods for efficiency and cost reduction. | 20th Apr 1931 | Morton \ M13.2 img049 | |
| Springing modifications on a Phantom I chassis (110-DC) to improve ride comfort. | 30th Apr 1931 | Morton \ M13.2 img050 | |
| Road test report on a Large Pin 25 HP crankshaft to determine its critical speed and torsional periods. | 9th May 1931 | Morton \ M13.2 img051 | |
| Tests conducted on the Diamond Engine Mounting for a 25 HP car. | 11th May 1931 | Morton \ M13.2 img052 | |
| Report page detailing the next step to increase a unit's power output without losing desirable characteristics. | 11th May 1931 | Morton \ M13.2 img053 | |
| The dimensions of a single down-draught Zenith carburetter Type 36-VI and the despatch of a horizontal Triple Diffuser Zenith carburetter. | 11th May 1931 | Morton \ M13.2 img054 | |
| Reliability of the Phantom II exhaust system and a new manifold design for the Japanese market. | 19th May 1931 | Morton \ M13.2 img055 | |
| Performance comparison graph for two different exhaust manifold designs. | 19th May 1931 | Morton \ M13.2 img056 | |
| Modifications for a 20/25 HP 'T' Series car for testing in France. | 21th May 1931 | Morton \ M13.2 img057 | |
| Work on a car, including crankshaft replacement, speedometer alteration, and exhaust manifold fitting. | 23th May 1931 | Morton \ M13.2 img058 | |
| Sending a booklet on a twin carburetter used on the 25 HP model. | 28th May 1931 | Morton \ M13.2 img059 | |
| Investigation into the cause and elimination of gear rattle on 25 HP models. | 29th May 1931 | Morton \ M13.2 img060 | |
| Experiment with a flexible drive between the flywheel and gearbox which resulted in gear rattles. | 29th May 1931 | Morton \ M13.2 img061 | |
| Performance graph comparing a Twin Zenith carburetter with a Standard Chassis carburetter on a 'Japan' engine using different camshafts. | 22th May 1930 | Morton \ M13.2 img062 | |
| Petrol supply for the low-speed jet in single carburetters intended for Japan. | 3rd Jun 1931 | Morton \ M13.2 img063 | |
| Verifying the cause of overrun gear rattle by fitting heavier cast iron pistons to a 25 HP engine. | 9th Jun 1931 | Morton \ M13.2 img064 | |
| J.3 engine design, balancing increased performance against the core values of comfort and silence, and considering a separate sporting car model. | 13th Jun 1931 | Morton \ M13.2 img065 | |
| Typed memorandum page discussing the economics of building a single cylinder unit. | 13th Jun 1931 | Morton \ M13.2 img066 | |
| Analysis of different carburetter arrangements for the Phantom II and 25 HP models. | 7th Jul 1931 | Morton \ M13.2 img067 | |
| Engine performance, focusing on carburettor configurations, M.E.P., and experiments with different setups. | 7th Jul 1931 | Morton \ M13.2 img068 | |
| Engine performance, comparing power outputs of different designs, and outlining future experiments and improvements. | 1st Jul 1931 | Morton \ M13.2 img069 | |
| Graph comparing the performance of various carburettor arrangements on a Phantom II engine. | 8th Jul 1931 | Morton \ M13.2 img070 | |
| Flywheel vibration and gear rattle tests for the 25 HP engine. | 8th Jul 1931 | Morton \ M13.2 img071 | |
| Arguing against reducing the cylinder size of the new 25 HP 'Japan' car due to minimal performance gains. | 1st Jul 1931 | Morton \ M13.2 img072 | |
| Experiments with balance weights and flywheel vibrations on a 25 HP engine. | 22th Jul 1931 | Morton \ M13.2 img073 | |
| Sketch of the balance weights used on the 25 HP crankshaft. | 23th Jul 1931 | Morton \ M13.2 img074 | |
| Performance graph plotting BHP and Induction Pipe Depression against RPM for a China Unit engine. | 23th Jul 1931 | Morton \ M13.2 img075 | |
| Performance graph showing the effect of increased valve lift on a 'Japan Engine'. | 11th Aug 1931 | Morton \ M13.2 img076 | |
| Completion of car 19-GIV with modified radiator and its travel itinerary. | 11th Aug 1931 | Morton \ M13.2 img077 | |
| Coil ignition misfires and spark plug gap adjustments on the 20/25 HP chassis. | 3rd Aug 1931 | Morton \ M13.2 img078 | |
| The testing and comparison of various ignition coils, including a modified standard coil. | 3rd Aug 1931 | Morton \ M13.2 img079 | |
| List of advantages for a specific coil design, covering manufacturing, reliability, and performance. | 3rd Aug 1931 | Morton \ M13.2 img080 | |
| Rationale behind spring selection for the 25 HP model for France, balancing comfort and performance. | 17th Aug 1931 | Morton \ M13.2 img081 | |
| The results of loading tests on a 25 HP crankcase. | 19th Aug 1931 | Morton \ M13.2 img082 | |
| Results of acceleration and hill climbing tests for an improved 25 HP car. | 19th Aug 1931 | Morton \ M13.2 img083 | |
| Low-speed performance and acceleration test results for a close-coupled four-seater, comparing different carburetor and silencer setups. | 15th Aug 1931 | Morton \ M13.2 img084 | |
| Series of camshaft tests, comparing different timings, valve sizes and carburetter configurations. | 26th Aug 1931 | Morton \ M13.2 img085 | |
| Tests to find the effect of balance weights on flywheel vibration for a 25 HP engine. | 27th Aug 1931 | Morton \ M13.2 img086 | |
| Blueprint showing three numbered schematic line diagrams. | 27th Aug 1931 | Morton \ M13.2 img087 | |
| Technical memo discussing the use of harmonic balancers on American engines and their potential application on a 6-cylinder engine. | 27th Aug 1931 | Morton \ M13.2 img088 | |
| Performance tests carried out at Brooklands on an improved 25 HP car with engine modifications. | 29th Aug 1931 | Morton \ M13.2 img089 | |
| Bar chart comparing lap speeds of a 25 HP car with different engine, carburettor, and axle configurations at Brooklands Track. | 26th Aug 1931 | Morton \ M13.2 img090 | |
| Performance comparison chart for a 25 HP car, detailing speed improvements with different engine and axle configurations at Brooklands track. | 26th Aug 1931 | Morton \ M13.2 img091 | |
| Summarizing the results of experiments on two 25 HP cars, detailing performance and smoothness work. | 29th Aug 1931 | Morton \ M13.2 img092 | |
| Recommending a successfully tested alternative oil for hypoid rear axles. | 1st Sep 1931 | Morton \ M13.2 img093 | |
| Responding to criticisms from a report on a 25 HP car after 8,000 miles. | 15th Sep 1931 | Morton \ M13.2 img094 | |
| Front engine suspension and clutch lubrication queries. | 23th Sep 1931 | Morton \ M13.2 img095 | |
| Comments on a report regarding criticisms of the 25 HP car 19-G4 after 8,000 miles. | 15th Sep 1931 | Morton \ M13.2 img096 | |
| Investigation into different power outputs from 'Japan' heads and alterations to the compression ratio. | 16th Sep 1931 | Morton \ M13.2 img097 | |
| Phantom II cooling tests, specifically examining air temperature rise through the radiator and bonnet ventilation. | 7th Sep 1931 | Morton \ M13.2 img098 | |
| Comparing a 25 HP synchromesh gearbox with a Buick's, noting performance and idling noise. | 22th Sep 1931 | Morton \ M13.2 img099 | |
| Power output tests for a 'Japan' engine, detailing findings on valve timing, carburettor setups, and manifold capacity. | 24th Sep 1931 | Morton \ M13.2 img100 | |
| Tests concerning induction pipe capacity, carburettor position and type, and inlet valve clearance modifications. | 24th Sep 1931 | Morton \ M13.2 img101 | |
| Performance comparison graph of three different carburetter configurations, plotting horsepower and pressure against engine RPM. | 19th Aug 1931 | Morton \ M13.2 img102 | |
| Blueprint graph showing B.HP vs R.P.M. performance and specifications for the 'Japan Unit' engine. | 18th Sep 1931 | Morton \ M13.2 img103 | |
| Performance comparison graph of four different carburetter setups for a 'Japan Unit' engine, showing B.HP vs R.P.M. | 18th Sep 1931 | Morton \ M13.2 img104 | |
| Blueprint graph showing the effect of increasing induction on engine performance, plotting B.HP against R.P.M. | 23th Sep 1931 | Morton \ M13.2 img105 | |
| Graph comparing engine performance results from two different camshaft timing alterations. | 23th Sep 1931 | Morton \ M13.2 img106 | |
| Graph comparing induction pipe capacities for the Japan Unit, plotting B.HP against R.P.M. | 23th Sep 1931 | Morton \ M13.2 img107 | |
| Performance comparison graph for single versus double Claudel carburettors. | 23th Sep 1931 | Morton \ M13.2 img108 | |
| The preparation of car 18-G4 with new parts for the 25 HP model, citing urgency based on competitor performance. | 1st Oct 1931 | Morton \ M13.2 img109 | |
| Recommendation to implement improvements on a 25 HP car following satisfactory tests. | 2nd Oct 1931 | Morton \ M13.2 img110 | |
| Correction notice regarding induction pipe depression units and carburetter timing for power output tests. | 2nd Oct 1931 | Morton \ M13.2 img111 | |
| Dynamometer test report on a 25 HP Synchro Mesh Gearbox. | 3rd Oct 1931 | Morton \ M13.2 img112 | |
| Performance graph comparing high and low lift rockers for a single carburettor Japan Unit. | 5th Oct 1931 | Morton \ M13.2 img113 | |
| Case of engine overheating caused by blocked water passages on a 25 HP cylinder block. | 5th Oct 1931 | Morton \ M13.2 img114 | |
| Tests on a 25 HP engine for roughness, involving a thin flange flywheel and Chrysler balance weights. | 5th Oct 1931 | Morton \ M13.2 img115 | |
| Comments on failures for a 19-G4 car following a 16,000-mile test. | 7th Oct 1931 | Morton \ M13.2 img116 | |
| Battery ignition and exhaust valve failures, with proposed solutions. | 7th Oct 1931 | Morton \ M13.2 img117 | |
| The performance and failures of model 19.G.IV after 15,000 miles. | 30th Sep 1931 | Morton \ M13.2 img118 | |
| Carburetter specifications, modifications, and performance test results. | 1st Oct 1931 | Morton \ M13.2 img119 | |
| Specifications of a Citroen car. | 2nd Oct 1931 | Morton \ M13.2 img120 | |
| Delivery of a 20/25 HP dummy chassis and the fitting of a new extended petrol tank before delivery to the coachbuilders. | 19th Oct 1931 | Morton \ M13.2 img121 | |
| 25 HP flywheel vibration and the use of balance weights. | 19th Oct 1931 | Morton \ M13.2 img122 | |
| Engine power output for a 10,000-mile car following modifications to the camshaft, pistons, and various exhaust systems. | 27th Oct 1931 | Morton \ M13.2 img123 | |
| Performance comparison graph of a CI unit against a 5.70 C/R & CXI unit. | 29th May 1931 | Morton \ M13.2 img124 | |
| Power curves graph showing BHP and BMEP vs RPM from a 10,000-mile engine test with various exhaust configurations. | 25th Oct 1931 | Morton \ M13.2 img125 | |
| Supply and design schemes for 25 HP crankshaft balance weights. | 27th Oct 1931 | Morton \ M13.2 img126 | |
| Order for 18' rims and non-standard Venetian cream dial instruments for a 25 HP car. | 28th Oct 1931 | Morton \ M13.2 img127 | |
| Tests on a 25 HP Synchromesh Gearbox reverse gear to improve stiffness. | 11th Nov 1931 | Morton \ M13.2 img128 | |
| The pedal pressure specifications for the 25 HP clutch. | 16th Nov 1931 | Morton \ M13.2 img129 | |
| Blueprint diagram of clutch leverage and spring pressure for a synchro mesh system. | 6th Nov 1931 | Morton \ M13.2 img130 | |
| Issues and improvements related to clutch stops on various vehicle models with synchro mesh gearboxes. | 6th Nov 1931 | Morton \ M13.2 img131 | |
| Results of various induction pipe and carburetter tests for distribution and power output. | 17th Nov 1931 | Morton \ M13.2 img132 | |
| Carburetter and camshaft performance tests, comparing Japan 1 and Bentley setups and concluding on pipe design. | 17th Nov 1931 | Morton \ M13.2 img133 | |
| Photograph showing a detailed view of an engine's carburettor and ignition system. | 18th Nov 1931 | Morton \ M13.2 img134 | |
| Maximum speed of 81 M.P.H. achieved by car model 18-G4 under favourable conditions. | 18th Nov 1931 | Morton \ M13.2 img135 | |
| Power output graph for the China Unit C/R engine, showing BHP and B.M.E.P vs RPM. | 21th Nov 1931 | Morton \ M13.2 img136 | |
| Comparing the acceleration figures of car models 18-GIV and 14-GIV. | 21th Nov 1931 | Morton \ M13.2 img137 | |
| Stress calculations for 25 HP valve springs and proposing a test for a new set. | 28th Nov 1931 | Morton \ M13.2 img138 | |
| Design specifications for a valve spring named 'China'. | 28th Nov 1931 | Morton \ M13.2 img139 | |
| Investigation into timing gear rattles on the 25 HP engine, caused by a new high-lift camshaft and stronger valve springs. | 30th Nov 1931 | Morton \ M13.2 img140 | |
| Comparison table of different radiator types detailing their chassis, weight, and water capacity. | 30th Nov 1931 | Morton \ M13.2 img141 | |
| Press publication, technical description, and photography of the Goshawk II. | 18th Sep 1922 | Morton \ M14 img001 | |
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