Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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DescriptionDateIdentifier
Diagram of a modified shape for inlet bends in a cylinder head, with valve dimensions and areas.24th Aug 1933Box 31 \ 2  Scan111
Blueprint graph comparing the airflow of a standard head versus a large inlet valve head for the Phantom engine.29th Aug 1933Box 31 \ 2  Scan112
Cover sheet with an ink stamp from the Int Room in Derby.29th Aug 1933Box 31 \ 2  Scan113
Graph comparing the flow through a standard head and a large inlet valve head on a Phantom engine.29th Aug 1933Box 31 \ 2  Scan114
Graph comparing the flow rate versus pressure difference for a standard head and a large inlet valve head on a Phantom engine.29th Aug 1933Box 31 \ 2  Scan115
Graph comparing the effectiveness of opposite halves of an inlet valve in a large valve cylinder head at full lift.29th Aug 1933Box 31 \ 2  Scan116
Curve showing the variation of air flow with varying valve lift for a large valve (E.83906) cylinder head on a Phantom engine.29th Aug 1933Box 31 \ 2  Scan117
Graph comparing airflow through various Phantom II cylinder heads and an 8 Litre Bentley head.29th Aug 1933Box 31 \ 2  Scan118
Graph comparing flow through inlet ports no. 1 & 6 for a Standard Bentley Head.29th Aug 1933Box 31 \ 2  Scan119
Graph comparing airflow through a Standard Bentley Head inlet port with and without a guide vane.29th Aug 1933Box 31 \ 2  Scan120
Graph comparing flow through a standard Bentley head EB 222 versus a 30° inlet valve seat head.29th Aug 1933Box 31 \ 2  Scan121
Graph comparing air flow through four different types of experimental Bentley cylinder heads.29th Aug 1933Box 31 \ 2  Scan122
Graph comparing flow through E.83904 inlet valves, with and without regrinding lips, in an E.83906 head.29th Aug 1933Box 31 \ 2  Scan123
Graph of power curves comparing different inlet valve sizes for the Phantom engine.29th Aug 1933Box 31 \ 2  Scan124
Power curve graph comparing the performance of a standard head (EB 222) versus a head with large inlet valves (EB GIS) on a Bentley engine.29th Aug 1933Box 31 \ 2  Scan125
Performance curve chart comparing a standard and a long duration camshaft for a Phantom engine.29th Aug 1933Box 31 \ 2  Scan126
The reverse side of a document showing a purple ink stamp from the print room.29th Aug 1933Box 31 \ 2  Scan127
The receipt of Beryllium Bronze and the recommended heat treatment for manufacturing valve guides.8th Sep 1933Box 31 \ 2  Scan128
Addendum to a report on tests concerning the efficiency of valving for Phantom and Bentley engines.25th Sep 1933Box 31 \ 2  Scan129
Conclusions from tests on engine cylinder head components, including induction ports, combustion chambers and valves.25th Sep 1933Box 31 \ 2  Scan130
Summary of tests to improve volumetric efficiency by fitting two inlet valves per cylinder and shortening the induction port.25th Sep 1933Box 31 \ 2  Scan131
Two diagrams showing a sectional elevation and a horizontal cut of a rotating port mechanism.26th Sep 1938Box 31 \ 2  Scan132
Stamped cover or separator sheet from the print room.26th Sep 1938Box 31 \ 2  Scan133
Graph showing the effect of the inlet port angle on the flow through a valve port.26th Sep 1938Box 31 \ 2  Scan134
Graph comparing airflow versus pressure differential for different engine cylinder heads.26th Sep 1938Box 31 \ 2  Scan135
Graph comparing airflow through different engine cylinder heads against pressure difference across the valve.26th Sep 1938Box 31 \ 2  Scan136
Table of pressure readings recorded at various places in an induction port.26th Sep 1933Box 31 \ 2  Scan137
Reverse side of a document with a Print Room stamp.26th Sep 1933Box 31 \ 2  Scan138
Drawing LeC.3680, an improved experimental exhaust valve to be made in Austenetic steel.28th Oct 1933Box 31 \ 2  Scan139
Addition to a report on tests for the efficiency of valving of Phantom II & Bentley engines, comparing wooden models to machined castings.6th Dec 1933Box 31 \ 2  Scan140
Summary of conclusions from tests on engine port streamlining and inlet valve modifications on a Bentley engine.6th Dec 1933Box 31 \ 2  Scan141
Graph comparing the air-flow of various Bentley cylinder heads.6th Dec 1933Box 31 \ 2  Scan142
Newspaper clipping from 'The Autocar' describing an auxiliary petrol tank device for easy engine starting.3rd Aug 1912Box 31 \ 3  Scan001
Modifications for cars operating in cold weather conditions at the front.5th Nov 1914Box 31 \ 3  Scan002
Radiator cooling options, including fan modifications and using oil to prevent freezing.6th Nov 1914Box 31 \ 3  Scan003
Cold weather engine starting issues, proposing a pilot jet for new chassis and other remedies for existing cars.6th Nov 1914Box 31 \ 3  Scan004
Procedure for cleaning sticky oil from exhaust valves and its inclusion in the Instruction Book.30th Dec 1914Box 31 \ 3  Scan005
Proposed petrol syringe system to facilitate easier engine starting.30th Dec 1914Box 31 \ 3  Scan006
Alternative starting procedure using a three-way cock and pressure pump.30th Dec 1914Box 31 \ 3  Scan007
Continuation page of instructions for operating air and petrol cocks.30th Dec 1914Box 31 \ 3  Scan008
Proposal for an 'Easy Starting' system using a standard hand pump to deliver a fine spray of petrol into the induction pipe.6th Jan 1915Box 31 \ 3  Scan009
Description of a petrol hand pump system and its advantages over other arrangements.6th Jan 1915Box 31 \ 3  Scan010
Fuel delivery systems and cold weather starting procedures for a 6-cylinder engine.8th Dec 1914Box 31 \ 3  Scan011
Hand-drawn diagram illustrating a vehicle's fuel delivery and priming system.8th Dec 1914Box 31 \ 3  Scan012
And comparing two arrangements for improving engine starting, one from Mr. Hives and another from Mr. Elliott.8th Jan 1915Box 31 \ 3  Scan013
Various arrangements for a fuel and air induction system for motor car and aero engines.8th Dec 1914Box 31 \ 3  Scan014
Carburettor pilot jet arrangements for starting aero engines, comparing Sthenos, Claudel Hobson, and Mercedes models.8th Dec 1914Box 31 \ 3  Scan015
Modification to the priming arrangement for easier engine starting.12th Jan 1915Box 31 \ 3  Scan016
Proposed arrangement for injecting a fine petrol spray into the induction pipe for engine starting.12th Nov 1915Box 31 \ 3  Scan017
Priming arrangement for easy engine starting.13th Jan 1915Box 31 \ 3  Scan018
Technical note discussing engine priming, induction pipe capacity and hand pump operation for starting.13th Jan 1915Box 31 \ 3  Scan019
The testing of a portable priming arrangement for starting car engines and suggestions for design improvements.14th Jan 1915Box 31 \ 3  Scan020
To the Shipping Department requesting a Priming Device be sent to Mr Royce.14th Jan 1915Box 31 \ 3  Scan021
New reed valve design for improving engine starting and the need to protect the design.15th Jan 1915Box 31 \ 3  Scan022
Letter discussing design improvements for syringes used for spraying petrol into an induction pipe.20th Jan 1915Box 31 \ 3  Scan023
Instructions for operating a priming device fitted to vehicle 7CA.27th Jan 1915Box 31 \ 3  Scan024
Issues with the priming and easy starting devices on car 7CA, comparing performance with car 58NA.6th Feb 1915Box 31 \ 3  Scan025
From 'R' to 'Wor.' for 'E.H.' discussing three potential modifications to a low-speed jet.15th Feb 1915Box 31 \ 3  Scan026
Experiments on 'Easy Starting Devices' involving modifications to a standard hand pump.15th Feb 1915Box 31 \ 3  Scan027
Experiments with a petrol priming system for engine starting, discussing pressure, reservoir capacity, and spray nozzles.15th Feb 1915Box 31 \ 3  Scan028
The design and function of a U-tube valve for engine priming and petrol delivery.15th Feb 1915Box 31 \ 3  Scan029
The problems with starting aero engines and the potential for a simple, light self-starter.15th Feb 1915Box 31 \ 3  Scan030
Diagram illustrating a priming arrangement for a fuel system.24th Feb 1915Box 31 \ 3  Scan031
Development and issues with an experimental priming device for easy starting.24th Feb 1915Box 31 \ 3  Scan032
Various devices for engine priming and enriching the fuel-air mixture.24th Feb 1915Box 31 \ 3  Scan033
Enriching scheme adopted for easier engine starting.24th Feb 1915Box 31 \ 3  Scan034
Internal memorandum detailing instructions from Mr. Royce for easy engine starting and seeking approval for a customer pamphlet.8th Mar 1915Box 31 \ 3  Scan035
The procedure for warming up an engine to ensure easy starting.9th Mar 1915Box 31 \ 3  Scan036
Implementation of a priming device, its pattern, and associated components.20th May 1919Box 31 \ 3  Scan037
Car 58NA, requesting a complete scheme for an instrument board hand pump.26th May 1915Box 31 \ 3  Scan038
Filing instruction slip referencing a report on a Priming Device.4th Jun 1915Box 31 \ 3  Scan039
The design and fitting instructions for a new spraying device.22th Jul 1915Box 31 \ 3  Scan040
From 'R' about expediting the production of 100 sets from temporary patterns for cars sent to the front.23th May 1919Box 31 \ 3  Scan041
Letter to Dr. Percy Duncan describing the features and benefits of an Auxiliary Water Carburettor.23th May 1919Box 31 \ 3  Scan042
Letter regarding the benefits and trial fitting of a water carburettor.16th Jul 1919Box 31 \ 3  Scan043
Sales letter from Rich & Bundy introducing their 'HOT-SPOT' electric vaporiser for engines.16th Jul 1919Box 31 \ 3  Scan044
Letter from RICH & BUNDY regarding a new electrical device offered in various voltages for inspection and trial.10th Nov 1919Box 31 \ 3  Scan045
Engine starting procedures, primer usage, and cold weather performance.10th Nov 1919Box 31 \ 3  Scan046
Cause of spark plug sooting being new engine starting arrangements and the self-starter.6th Nov 1919Box 31 \ 3  Scan047
Sales letter from The General Electric Co. Ltd. promoting the 'Kramer - Vaporiser' for solving cold-starting problems in engines.12th Dec 1919Box 31 \ 3  Scan048
Sales brochure for the 'Kramer-Vaporiser', a device for the rapid starting of petrol engines.1st Oct 1919Box 31 \ 3  Scan049
Instructional leaflet for the Kramer-Vaporiser, a device for starting petrol engines.14th Dec 1920Box 31 \ 3  Scan050
Comparison of amperes taken to turn a 40/50 engine using Prices' 'C' Oil and Castrol Oil.14th Dec 1920Box 31 \ 3  Scan051
Comparison of motor starter tests using Prices 'C' Oil and Castrol Oil.15th Dec 1920Box 31 \ 3  Scan052
Proposal by Mr. Royce to experiment with a hot spot induction system using exhaust heat to create a fuel 'fog' for improved cylinder distribution.15th Dec 1920Box 31 \ 3  Scan053
Relaying Mr. Royce's suggestions for experiments on reheating the carburetion system for the 40/50 HP chassis.21th Dec 1920Box 31 \ 3  Scan054
Internal memorandum discussing modifications to the induction system to suit available petrol and improve engine running in winter.24th Jan 1921Box 31 \ 3  Scan055
Proposed modifications to the 40/50 HP chassis throttle to create a 'hot spot'.1st Jul 1921Box 31 \ 3  Scan056
Modifications to a carburettor for handling fuel mixtures and cold weather starting.10th Oct 1921Box 31 \ 3  Scan057
Defective starting devices and proposed improvements to carburetters.10th Oct 1921Box 31 \ 3  Scan058
Modifications to a carburetter and induction system, including mixture strength and fitting a silencer.10th Oct 1921Box 31 \ 3  Scan059
Cablegram to Mr. Hives regarding the testing of a pilot jet and vaporising scheme.27th Oct 1921Box 31 \ 3  Scan060
Cablegram discussing the successful testing of modified vaporiser pipes and pilot jets for cold starting.27th Oct 1921Box 31 \ 3  Scan061
History of the development of a cold start system for cars in America.9th Nov 1921Box 31 \ 3  Scan062
The challenges of adapting car designs for the American market and the need for more autonomy at the Springfield factory.9th Nov 1921Box 31 \ 3  Scan063
Cable from Springfield regarding tests on a pilot jet to solve cold starting issues in the U.S.A.5th Nov 1921Box 31 \ 3  Scan064
'Winter Starting in America', attaching a previously omitted document.15th Nov 1921Box 31 \ 3  Scan065
Induction pipe changes and cold weather starting issues.1st Nov 1921Box 31 \ 3  Scan066
Report comparing the effectiveness of an exhaust heated throttle against a vaporiser scheme for engine induction.1st Nov 1921Box 31 \ 3  Scan067
Comparing an exhaust heated throttle with a vaporiser scheme for cold weather performance and making recommendations for American cars.1st Nov 1921Box 31 \ 3  Scan068


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