| Description | Date | Identifier | |
| Letter to F. H. Royce discussing issues with a subcontractor's work and proposing a meeting. | 11th Jul 1927 | Morton \ M6 img103 | |
| Comparison of HP figures for a 40/50 HP engine based on different exhaust pipe and down-pipe schemes. | 1st Apr 1924 | Morton \ M7 img001 | |
| From 'R' to Mr Bowley regarding issues with an old muff shaft coupling's workmanship, grip, and torque limits. | 1st Apr 1924 | Morton \ M7 img002 | |
| With suggestions for improving drivetrain components, focusing on shaft diameter, coupling bolts, and material choices to handle torque. | 1st Apr 1924 | Morton \ M7 img003 | |
| Agreeing to a standard design for gear wheels and steel castings. | 1st Apr 1924 | Morton \ M7 img004 | |
| With a sketch reviewing coupling designs, suggesting modifications to the 'Sellers pattern' and critiquing other work. | 1st Apr 1924 | Morton \ M7 img005 | |
| Draft note to Mr. Bentley discussing an alternative design for a coupling. | 1st Apr 1924 | Morton \ M7 img006 | |
| Standard hardened shafts and a new design for a 2-ton crab model with enclosed gears. | 20th Oct 1928 | Morton \ M7 img007 | |
| Letter discussing staff wages, pay rates, efficiency, and the need for cost justification. | 20th Oct 1928 | Morton \ M7 img008 | |
| Letter from F.H. Royce regarding the design of bolts and pins to prevent failure from eccentric loading, including a sketch. | 22th Sep 1930 | Morton \ M7 img009 | |
| Letter to Messrs Royce Ltd detailing conclusions from Mr. Bentley's visit regarding the design of electro-motors. | 12th Aug 1912 | Morton \ M7 img010 | |
| Varnish for impregnating field magnets/coils and the design of the armature shaft and core. | 12th Aug 1912 | Morton \ M7 img011 | |
| Continued discussion on schemes for repairing shafts, including recommendations on sleeves, armatures, and bearings. | 12th Aug 1912 | Morton \ M7 img012 | |
| Rough pencil sketches of potential vehicle components, including wheels and a radiator/grille. | 12th Aug 1912 | Morton \ M7 img013 | |
| Recommendations on bearing types, shaft materials, and commutator insulation. | 12th Aug 1912 | Morton \ M7 img014 | |
| Typed memorandum discussing specifications for brush holders, end bearings, and hoist mechanisms. | 12th Aug 1912 | Morton \ M7 img015 | |
| The requirements for a hoist motor and braking system, including automatic stopping and constant speed. | 12th Aug 1912 | Morton \ M7 img016 | |
| Page 7 of a letter concerning the excellent stopping satisfaction of a hoist, signed by F.H. Royce. | 27th Sep 1912 | Morton \ M7 img017 | |
| Letter suggesting an alternative method for drying impregnated coils using forced hot air. | 27th Sep 1912 | Morton \ M7 img018 | |
| Page 4 of a letter to Mr. Bentley from F. H. Royce regarding corrosion issues and an order. | 15th Sep 1911 | Morton \ M7 img019 | |
| Letter proposing a method for drying coils using forced hot air instead of a vacuum. | 27th Sep 1912 | Morton \ M7 img020 | |
| Methods for drying and treating coils, referencing wax baths, vacuum processes, and issues with varnish. | 15th Sep 1911 | Morton \ M7 img021 | |
| List of desired parts to be fitted to a chassis for a 10,000-mile run. | 19th Nov 1919 | Morton \ M7 img022 | |
| To Mr. Bentley criticizing the current process for manufacturing field coils and suggesting improvements. | 1st Jan 1935 | Morton \ M7 img023 | |
| Condition report on an EX Chassis, detailing component wear, mileage, and fuel consumption. | 28th Jan 1920 | Morton \ M7 img024 | |
| Condition of a 2E.X. chassis during a 10,000-mile test. | 28th Jan 1920 | Morton \ M7 img025 | |
| Extract from a report detailing issues with Michelin wheels, brake drums, mileage, and petrol consumption. | 11th Feb 1920 | Morton \ M7 img026 | |
| Extract from a report on vehicle 2.EX, detailing mileage, fuel consumption, and engine performance. | 4th Mar 1920 | Morton \ M7 img027 | |
| 2.EX car's return after a 10,000-mile run in France and proposing a meeting to discuss standardizing parts. | 7th Apr 1920 | Morton \ M7 img028 | |
| The standardisation of parts, specifically the oil retaining ring and magneto drive, after 10,000 miles of testing on the 2.EX car. | 9th Apr 1920 | Morton \ M7 img029 | |
| Component troubles with fabric couplings, an air pump, coil, and battery, with proposals for standardisation. | 9th Apr 1920 | Morton \ M7 img030 | |
| Numbered list of parts and modifications for an experimental car, intended for standardization. | 9th Apr 1920 | Morton \ M7 img031 | |
| The 10,000-mile test of the 2.EX chassis, detailing battery issues and a list of parts for standardization. | 9th Apr 1920 | Morton \ M7 img032 | |
| Telegram confirmation discussing engine piston rattles and carbon deposit issues. | 16th Mar 1920 | Morton \ M7 img033 | |
| The performance and wear characteristics of Castrol lubricating oil in experimental vehicles. | 8th Jun 1920 | Morton \ M7 img034 | |
| Properties and performance of lubricating oils, specifically Castrol oil, in gearboxes and cylinders. | 8th Jun 1920 | Morton \ M7 img035 | |
| Extract regarding the failure of a brazed brake bracket and the decision to continue with the process. | 28th Jun 1921 | Morton \ M7 img036 | |
| Fitting a 1-inch higher radiator and bonnet to a chassis to improve the appearance. | 7th Mar 1920 | Morton \ M7 img037 | |
| Review of the Compression Ignition programme, weighing the costs and results of external and internal projects before further investment. | 30th Nov 1931 | Morton \ M7 img038 | |
| The status and modifications of experimental chassis 7CA and 490B. | 22th Jun 1915 | Morton \ M7 img039 | |
| Internal update on the status of various cars, including a Mercedes, a Delaunay-Belleville, and a Daimler. | 30th Sep 1919 | Morton \ M7 img040 | |
| Page 3 of a letter discussing the sale of an item and notifying the sales department. | 30th Nov 1922 | Morton \ M7 img041 | |
| Policy of sending communications to ex-Derby officials at the Springfield, USA works. | 30th Nov 1922 | Morton \ M7 img042 | |
| Difference in piston pinning practices between the American (Springfield) and Derby factories. | 28th Nov 1922 | Morton \ M7 img043 | |
| Routing communications to Springfield through official channels to avoid friction caused by letters sent to private addresses. | 30th Nov 1922 | Morton \ M7 img044 | |
| Engine improvements for cold weather and poor fuel, focusing on the exhaust heated throttle and induction system modifications. | 1st Dec 1924 | Morton \ M7 img045 | |
| American modifications to a chassis, including feedback on drawings and a specific point on clutch spigot oiling. | 1st Dec 1924 | Morton \ M7 img046 | |
| Continuation page of a document concerning tests on a 20 HP car with balloon tyres. | 1st May 1923 | Morton \ M7 img047 | |
| Attaching updated horse power charts for Goshawk and 40/50 chassis. | 1st May 1923 | Morton \ M7 img048 | |
| Comparison of power losses in HP for different exhaust systems on the standard 40/50 model. | 1st Apr 1924 | Morton \ M7 img049 | |
| Performance chart comparing road wheel brake horsepower against engine RPM for various car configurations, with a table of lap speeds from Brooklands. | 1st Nov 1925 | Morton \ M7 img050 | |
| Performance increase from a 110° camshaft on various engines, referencing a 40/50 indicator diagram. | 21th Dec 1923 | Morton \ M7 img051 | |
| Blueprint detailing dimensions for 'Nearest Hook Approach' on an overhead system. | 21th Dec 1923 | Morton \ M7 img052 | |
| Blueprint cover for a project for Messrs Pilkington Bros. | 21th Dec 1923 | Morton \ M7 img053 | |
| Blueprint detailing an overhead crane or hoist system with various components. | 21th Dec 1923 | Morton \ M7 img054 | |
| General arrangement plan showing an Air Receiver, Air Compressor Cage, and Hose Reel. | 1st Jan 1931 | Morton \ M7 img055 | |
| Blueprint for a gantry crane showing dimensions, driver's cabin, and ladder. | 1st Jan 1931 | Morton \ M7 img056 | |
| Blueprint detailing components of a track system including wheels, runners, and bearings. | 26th Jan 1912 | Morton \ M7 img057 | |
| Blue cover for a document concerning an external warehouse. | 26th Jan 1912 | Morton \ M7 img058 | |
| Drawing for a 'Royce' 1 Ton Converted Crane. | 24th Jun 1913 | Morton \ M7 img059 | |
| Indicator diagram for a 40/50 HP engine, detailing performance data and valve timing. | 24th Jun 1913 | Morton \ M7 img060 | |
| Set of three graphs plotting pressure (LBS/D') relative to atmosphere against crankshaft degrees. | 20th Dec 1923 | Morton \ M7 img061 | |
| Graph of piston displacement and relative pressure against crankshaft degrees. | 20th Dec 1923 | Morton \ M7 img062 | |
| Graph plotting engine revolutions per minute against vehicle speed in miles per hour. | 5th May 1921 | Morton \ M7 img063 | |
| Blueprint showing a diagram plotted on a grid. | 5th May 1921 | Morton \ M7 img064 | |
| Performance graph with a dual-scaled Y-axis for M.E.P. (Lbs. Per Sq. Inch) and Ft Lbs. | 5th May 1921 | Morton \ M7 img065 | |
| Graph plotting engine performance curves for Horse Power, Torque, and M.E.P. against revolutions per minute. | 5th May 1921 | Morton \ M7 img066 | |
| Performance graph showing horsepower curves from bench and dynamometer tests for the 40/50 Chassis E. | 5th May 1921 | Morton \ M7 img067 | |
| Graph comparing M.E.P. and Torque Curves from Bench and Dynamometer tests with cut-out open and closed. | 5th May 1921 | Morton \ M7 img068 | |
| Performance graph for a high compression engine with different back axle ratios. | 5th May 1921 | Morton \ M7 img069 | |
| Performance graph plotting M.E.P (Mean Effective Pressure) in LBS Per SQ Inch against Ft Lbs. | 5th May 1921 | Morton \ M7 img070 | |
| Graph comparing Mean Effective Pressure power curves for Goshawk II and 40/50 engines under bench and dynamometer conditions. | 5th May 1921 | Morton \ M7 img071 | |
| Performance graph comparing dynamometer and bench horsepower against RPM. | 14th Feb 1923 | Morton \ M7 img072 | |
| Graph charting test results for six cars for a month ending in February 1923, possibly related to the Goshawk. | 14th Feb 1923 | Morton \ M7 img073 | |
| Blueprint graph with data plotted on a grid. | 1st May 1928 | Morton \ M7 img074 | |
| Blueprint graph of Horse Power and Mean Effective Pressure curves for a 4-0/50 engine. | 1st May 1928 | Morton \ M7 img075 | |
| Performance graph comparing Bench and Dynamometer Horse Power for a 40/50 HP engine. | 1st May 1928 | Morton \ M7 img076 | |
| Comparing the engine cooling performance between the Hispano and the 40/50 HP models. | 25th Nov 1924 | Morton \ M8 img001 | |
| Road-based cooling tests comparing the 40/50 HP model with a Hispano model. | 25th Nov 1924 | Morton \ M8 img002 | |
| Recommendations for addressing engine overheating and managing customer complaints about water boiling. | 10th Dec 1924 | Morton \ M8 img003 | |
| Engine water circulation, radiator performance, and shutter arrangements. | 28th Nov 1924 | Morton \ M8 img004 | |
| Secret memorandum requesting conclusions from a cooling investigation report to address car overheating issues. | 28th Nov 1924 | Morton \ M8 img005 | |
| Need for under-dashboard ventilation in the 'Sluggard type' car due to excessive heat. | 27th Feb 1912 | Morton \ M8 img006 | |
| Letter discussing helical timing gears, plate clutches, and the progress of experiments. | 18th Apr 1912 | Morton \ M8 img007 | |
| Engine heating issues, flywheel drop forging, and friction-damped spring couplings. | 18th Apr 1912 | Morton \ M8 img008 | |
| Graph of HP (Horsepower) versus Fan Speed (RPM) for two different fan configurations. | 20th Nov 1924 | Morton \ M8 img009 | |
| Graph plotting thrust curves against fan speed for seven different engine fan configurations and a ventilator fan. | 20th Nov 1924 | Morton \ M8 img010 | |
| Bench experiments and thrust tests conducted on various radiator fans. | 19th Nov 1924 | Morton \ M8 img011 | |
| Letter discussing design improvements for the fan of a 40-50 HP chassis. | 19th Sep 1924 | Morton \ M8 img012 | |
| Analysis of the rate of increase of power with speed for a fan, exploring options like variable pitch propellers and blade twist to manage power absorption. | | Morton \ M8 img013 | |
| Need to change piston rings and the method of pinning them. | 11th Jun 1917 | Morton \ M8 img014 | |
| Requesting an experimental run with piston rings featuring a wide gap and alternative pinning arrangements. | 22th Jun 1917 | Morton \ M8 img015 | |
| Request for a complete Remy ignition set for Mr. Royce's examination and discussion on fitting it to aeroplane engines. | 13th Jun 1917 | Morton \ M8 img016 | |
| From Mr. Royce enquiring about the performance of multi-ring pistons in aero engines during a nose dive. | 15th Jun 1917 | Morton \ M8 img017 | |
| Brief analysis of a 260 HP German Mercedes engine's performance characteristics. | 2nd Jul 1917 | Morton \ M8 img018 | |
| Obtaining and forwarding performance particulars of aeroplanes fitted with the company's engines. | 2nd Jul 1917 | Morton \ M8 img019 | |
| Outlining two methods for designing a high-altitude engine, including a proposed safety device. | 4th Jun 1917 | Morton \ M8 img020 | |
| Description of an engine's automatic pressure control system, detailing the function of a reservoir, valves, and an aneroid apparatus. | 1st Jun 1917 | Morton \ M8 img021 | |
| Engine's fail-safe mode, where power is reduced upon electrical or oil pressure failure until nearing the ground. | 1st Jun 1917 | Morton \ M8 img022 | |
| Description of an engine's pressure-controlled reservoir system involving automatic valves and an aneroid barometer. | 1st Jun 1917 | Morton \ M8 img023 | |
| | | | |
