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).
Rolls-Royce Experimental Archives                
Choose Archive


Browsing Records        Page 786 of 2367        Sort by   Box   Date   Description

Filter      from        to             identifier   [all]
DescriptionDateIdentifier
Extract detailing an oil leak issue with the vacuum pump on the S.S. Chassis and proposing a fix.1st Aug 1929Box 64 \ 1  scan0046
Proposal for a design change to the J.2 Series Vacuum Pump to re-route its air exhaust.16th Aug 1929Box 64 \ 1  scan0047
Standard production test procedure for the Autovac fuel system to ensure efficient operation.6th Aug 1929Box 64 \ 1  scan0048
Recommendation to return faulty Autovacs to the makers for rectification due to potential petrol supply issues.22th Aug 1929Box 64 \ 1  scan0049
Modification to address over-oiling on the vacuum pump by discharging its exhaust into the crankcase.22th Aug 1929Box 64 \ 1  scan0050
Arranging to send a vacuum pump piston connecting rod and eccentric to Autovac Manfg. Co. Ltd. for testing.29th Aug 1929Box 64 \ 1  scan0051
Letter from Autovac Manfg. Co. Ltd. acknowledging a letter and awaiting the arrival of a vacuum pump for reporting.28th Aug 1929Box 64 \ 1  scan0052
Proposing to hold up the testing of autovacs pending further instructions.2nd Sep 1929Box 64 \ 1  scan0053
Recurring failure in the Autovac petrol system and the necessity for further testing.2nd Sep 1929Box 64 \ 1  scan0054
Comparative tests of a non-return valve in the Phantom II petrol supply system.28th Oct 1929Box 64 \ 1  scan0055
Graph comparing the petrol delivery of a Phantom II feed system with and without a non-return valve, measured against engine RPM.1st Mar 1930Box 64 \ 1  scan0056
Dangerous Phantom II Autovac petrol supply failure causing the crankchamber to fill with petrol.1st Mar 1930Box 64 \ 1  scan0057
Float mechanism failure, suggesting reproduction on experimental cars and retrospective action.8th Mar 1930Box 64 \ 1  scan0058
The failure and subsequent redesign of the Phantom II Autovac petrol supply float.12th Mar 1930Box 64 \ 1  scan0059
Petrol supply failure on Chassis No 21 EX, caused by a leaking Autovac float.27th Mar 1930Box 64 \ 1  scan0060
Dispatch of spare floats and the replacement of Autovacs for the Phantom II due to petrol supply failures.2nd Apr 1930Box 64 \ 1  scan0061
Recurring failures of the Autovac petrol supply float in the Phantom II model.2nd Apr 1930Box 64 \ 1  scan0062
Relocation of the petrol filter and the potential for air locks.24th May 1930Box 64 \ 1  scan0063
Return of autovac tanks with aluminium tops for modifications before testing.4th Jun 1930Box 64 \ 1  scan0064
Testing Autovacs with Aluminium heads versus Brass heads for 40/50-HP and 20/25-HP chassis.6th Jun 1930Box 64 \ 1  scan0065
Cooling system tests conducted at Brooklands between the 17th and 20th of June 1930.25th Jun 1930Box 64 \ 1  scan0066
Engine cooling improvements through various ventilation methods like bonnet shutters and undershields.28th Feb 1931Box 64 \ 1  scan0067
Analysis of engine cooling systems, radiator variations, and oil temperatures during vehicle testing.25th May 1930Box 64 \ 1  scan0068
Vehicle performance issues related to ignition advance, overheating, and petrol supply during lap speed testing.1st Jul 1925Box 64 \ 1  scan0069
Test report comparing vehicle performance, noting issues with an American car's speed and durability, and investigating the effects of bonnet ventilation and fan belt tension.1st Jul 1925Box 64 \ 1  scan0070
Water circulation experiments, pump performance, and comparisons with the American Phantom II.28th Aug 1930Box 64 \ 1  scan0071
Improving engine cooling through modifications to the undershield, fan, radiator, and bonnet for high-speed performance.25th Jun 1931Box 64 \ 1  scan0072
Graph plotting top water, bottom water, and oil temperatures against miles run under specific test conditions.25th Jun 1931Box 64 \ 1  scan0073
Graph of overheating test results for a Phantom II Cabriolet with various bonnet and undershield configurations.25th Jun 1931Box 64 \ 1  scan0074
Graph plotting top and bottom water temperatures against various bonnet and shutter configurations.25th Jun 1931Box 64 \ 1  scan0075
Graph plotting oil and water temperature against miles run during a vehicle test.25th Jun 1931Box 64 \ 1  scan0076
Graph comparing the critical ATS temperature for a spring-tensioned fan versus a positively tensioned fan belt at 62 MPH with no bonnet ventilation.25th Jun 1931Box 64 \ 1  scan0077
Graph comparing top water temperature against miles run for two experimental vehicle configurations (18 E.X. and 19 E.X.).26th Jun 1934Box 64 \ 1  scan0078
Blueprint showing a modification to the front undershield to improve the cooling system.26th Jun 1934Box 64 \ 1  scan0079
Testing a modified self-draining float for the Autovac petrol feed system to prevent failure from temperature effects.4th Jul 1930Box 64 \ 1  scan0080
Self-draining float for the Autovac system and a recommendation for its adoption.4th Jul 1930Box 64 \ 1  scan0081
The production start date for a larger Autovac valve for the Phantom II to overcome petrol trouble.4th Jul 1930Box 64 \ 1  scan0082
Standardisation report for a larger Autovac float chamber tank and valve to overcome petrol starvation at high speeds.4th Jun 1930Box 64 \ 1  scan0083
Second report on Brooklands radiator tests, detailing issues with the autovac fuel supply system.9th Jul 1930Box 64 \ 1  scan0084
Analysis of how high air intake temperatures affect vacuum pump efficiency and cause fuel supply issues.9th Jul 1930Box 64 \ 1  scan0085
Cooling system fan belt alternatives and mixture strength issues at high speed.9th Jul 1930Box 64 \ 1  scan0086
Tests related to pre-ignition, over-heating, radiator matrices and radiator bottom outlets.9th Jul 1930Box 64 \ 1  scan0087
Engine cooling circulation tests, analyzing water temperature changes with restricted flow and varying vehicle speeds.9th Jul 1930Box 64 \ 1  scan0088
Analysis of vehicle cooling system performance, considering factors like fan efficiency, wind, and temperatures.9th Jul 1930Box 64 \ 1  scan0089
Recommendations for improvements to the fan belt, autovac, and cooling system, with proposed further tests.19th Jul 1930Box 64 \ 1  scan0090
Blueprint with graphs showing the effects of fan, speed, and ventilation on a vehicle's cooling system.2nd Jul 1930Box 64 \ 1  scan0091
Series of graphs showing the effect of water circulation on overheating in a PII water system.2nd Jul 1930Box 64 \ 1  scan0092
Line graph from a Brooklands test plotting top and bottom water temperature against various engine cooling configurations.2nd Jul 1930Box 64 \ 1  scan0093
Graph showing the effect of temperature on complete car circulation and pump suction.23th Jul 1930Box 64 \ 1  scan0094
Unsatisfactory fixing arrangements and poor appearance of an Autovac tank.23th Jul 1930Box 64 \ 1  scan0095
Complaint and suggesting design improvements for the Autovac tank stud and nut assembly.24th Jul 1930Box 64 \ 1  scan0096
Recommendation to adopt the Autovac Company's modified self-draining float.28th Jul 1930Box 64 \ 1  scan0097
Standardisation and production of a new self-draining float for the Autovac battery feed system.14th Aug 1930Box 64 \ 1  scan0098
The reduction of reserve petrol in the Autovac to prevent engine starvation.1st Aug 1930Box 64 \ 1  scan0099
Reduced fuel reserve in the Autovac tank for Phantom II chassis by replacing the main feed pipe.20th Aug 1930Box 64 \ 1  scan0100
Standardisation of a self-draining autovac float with larger stem and vent holes.14th Jul 1930Box 64 \ 1  scan0101
Standardisation of an Autovac top in aluminium for chassis parts.28th Jun 1930Box 64 \ 1  scan0102
Requesting a check of dimensions and completion of calculations for the 'SEAGULL' starting motor.19th Oct 1922Box 64 \ 1  scan0103
Request for the reduction ratio and piston displacement for 'Seagull' starter motor calculations.30th Nov 1922Box 64 \ 1  scan0104
Specifications for a starter motor, including pinion, flywheel, and epicyclic reduction gear ratios.15th Feb 1923Box 64 \ 1  scan0105
Alterations for a 40/50 dynamo and an E.A.C. starter motor, including specifications and sketches.28th Feb 1923Box 64 \ 1  scan0106
Electrical specifications and gear ratios for a starter motor system.20th Mar 1923Box 64 \ 1  scan0107
Starter motor to engine gear ratio, questioning the proposed 32 to 1 reduction.20th Mar 1923Box 64 \ 1  scan0108
The design requirements for motor windings to handle engine starting and compression.20th Mar 1923Box 64 \ 1  scan0109
Requesting a decision on the E.A.C. starter motor reduction ratio and arranging a follow-up meeting with Mr. Royce.9th Apr 1923Box 64 \ 1  scan0110
Starter motor gearing ratio and starting speed.12th Apr 1923Box 64 \ 1  scan0111
Table comparing the dimensions and ratios for various dynamo and motor sizes.18th Apr 1923Box 64 \ 1  scan0112
Technical memorandum comparing the suitability of a Goshawk starter motor for an E.A.C. engine, including E.M.F. calculations.5th May 1923Box 64 \ 1  scan0113
Calculations of polar flux density and related quantities for Goshawk and E.A.C. motors.5th May 1923Box 64 \ 1  scan0114
Technical analysis of motor performance, discussing flux density, torque, and calculations related to the Goshawk motor.5th May 1923Box 64 \ 1  scan0115
Calculations for E.A.C. and Goshawk starter motors, focusing on the number of conductors.30th Apr 1923Box 64 \ 1  scan0116
Calculations for an E.A.C. starter motor.30th Apr 1923Box 64 \ 1  scan0117
Page of calculations for an electric motor, detailing flux, conductors, and back E.M.F.30th Apr 1923Box 64 \ 1  scan0118
Page of calculations for armature resistance, length, and cross-sectional area.30th Apr 1923Box 64 \ 1  scan0119
Calculations for slot area, depth, and width using copper space efficiency.30th Apr 1923Box 64 \ 1  scan0120
Calculation table for ampere-turns needed to produce the required magnetic flux.30th Apr 1923Box 64 \ 1  scan0121
Calculations for determining field winding resistance and equivalent wire gauge.30th Apr 1923Box 64 \ 1  scan0122
Calculations for the adaptation of a Goshawk-sized starter motor for an E.A.C. engine.30th Apr 1923Box 64 \ 1  scan0123
Page of engineering calculations for flux and conductors.16th May 1923Box 64 \ 1  scan0124
Secret memo discussing design improvements and performance specifications for a starter motor, including a revised drawing.16th May 1923Box 64 \ 1  scan0125
Two alternative proposals for starter motor windings.30th May 1923Box 64 \ 1  scan0126
Continued discussion on motor calculations and performance, specifically addressing abnormal results due to a high reduction ratio.30th May 1923Box 64 \ 1  scan0127
Continued discussion on motor efficiency calculations, current, torque, and conductor design.30th May 1923Box 64 \ 1  scan0128
Revised calculations for an E.A.C. starter motor under unfavourable starting conditions.30th May 1923Box 64 \ 1  scan0129
Calculations for static torque, polar flux density, and armature design.30th May 1923Box 64 \ 1  scan0130
Calculations for motor E.M.F. and resistance, including armature and field resistance.30th May 1923Box 64 \ 1  scan0131
Page of calculations for armature design, including resistance, slot dimensions, and tooth width.30th May 1923Box 64 \ 1  scan0132
Calculation table for Ampere Turns required to produce a specific magnetic flux in various components.30th May 1923Box 64 \ 1  scan0133
Page of calculations for electrical field windings, including ampere turns, resistance, and wire gauge.30th May 1923Box 64 \ 1  scan0134
Motor winding specifications, including turns, resistance, and flux density.23th May 1923Box 64 \ 1  scan0135
Secret blueprint showing revised dimensions for a starter motor.23th May 1923Box 64 \ 1  scan0136
Calculations for the 40/50 starter motor and proposing new overload test conditions and design modifications.4th Jun 1923Box 64 \ 1  scan0137
Technical memo discussing the design and characteristics of a motor, specifically its teezer circuit and windings.1st Jun 1923Box 64 \ 1  scan0138
The motor's main series winding, resistance, and progress on the dynamo and starter motor for the 40/50 model.4th Jun 1923Box 64 \ 1  scan0139
Winding specifications for a starter motor in relation to a drawing.15th Jun 1923Box 64 \ 1  scan0140
Secret memo regarding calculations for an E.A.C. Starter Motor winding.17th Jun 1923Box 64 \ 1  scan0141
Calculations for an E.A.C. starter motor teazer winding.19th Jun 1923Box 64 \ 1  scan0142
Revised calculations for the E.A.C. Starter Motor.19th Jun 1923Box 64 \ 1  scan0143
Proposed experimental arrangements for main and teazer windings for a motor.19th Jun 1923Box 64 \ 1  scan0144
Calculations for the performance and electrical characteristics of an E.A.C. starter motor.19th Jun 1923Box 64 \ 1  scan0145


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙