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
Page from a service manual detailing cooling system checks and maintenance, focusing on the water pump and fan.1st Mar 1930Box 24 \ 5  Scan306
Factors affecting engine overheating, such as bonnet ventilation, fuel mixture strength, and the use of a cut-out.1st Aug 1930Box 24 \ 5  Scan307
Guidance on vehicle overheating, radiator shutters, and the function of the red warning light.1st Aug 1930Box 24 \ 5  Scan308
Customer overheating complaints and proposing a faster, double-pulley fan drive to improve cooling.3rd Mar 1930Box 24 \ 5  Scan309
The cooling performance of the Phantom II compared to competitor cars during the Fifth Brooklands Report.25th Aug 1930Box 24 \ 5  Scan310
Comparison of cooling system specifications and performance against competing car models.25th Aug 1930Box 24 \ 5  Scan311
Performance comparison report on 25 HP and 20 HP models, including maximum speed test data.25th Aug 1930Box 24 \ 5  Scan312
Page discussing gains from a 112º camshaft and higher compression.25th Aug 1930Box 24 \ 5  Scan313
Comparison of Face Area, Volume, and Temperature data for various car models.1st Sep 1930Box 24 \ 5  Scan314
Blueprint with two graphs comparing acceleration figures and speedometer calibrations for different cars.1st Sep 1930Box 24 \ 5  Scan315
Comparative data table of various cars, focusing on cooling system specifications and performance metrics.1st Sep 1930Box 24 \ 5  Scan316
Insufficient cooling on the Phantom II model and the inefficiency of its bonnet ventilators.1st Sep 1930Box 24 \ 5  Scan317
Explanation of the Phantom II's cooling system design, framed as a response to a customer's overheating complaint.1st Sep 1930Box 24 \ 5  Scan318
Instructions regarding the red warning lamp, cooling system boiling, and bonnet ventilation for different climates.3rd Sep 1930Box 24 \ 5  Scan319
Instructions regarding the engine's red warning lamp and driving on Continental roads.2nd Sep 1930Box 24 \ 5  Scan320
Retention of shutters on the Phantom 11 to aid cooling and address issues with excessive petrol heat.9th Sep 1930Box 24 \ 5  Scan321
Deletion and painting process of bonnet shutters.9th Jul 1927Box 24 \ 5  Scan322
Design changes for the 40/50 HP car bonnets.22th Jul 1937Box 24 \ 5  Scan323
Removal of rear shutters on cars not intended for tropical climates.30th Jun 1931Box 24 \ 5  Scan324
Phantom II overheating issues and proposing three modifications.4th Sep 1930Box 24 \ 5  Scan325
Overheating tests on the Phantom II, specifically investigating the modification of undershields.8th Sep 1930Box 24 \ 5  Scan326
Cooling performance issues and radiator modifications for the Phantom II car.9th Sep 1930Box 24 \ 5  Scan327
Concluding page of a comparison with the Phantom 11, stating a full report is in preparation.16th Sep 1930Box 24 \ 5  Scan328
Phantom II radiator cooling issues and a design change causing higher operating temperatures.16th Sep 1930Box 24 \ 5  Scan329
Radiator cooling issues on Phantom I & II models and the move to a more efficient square tube design.18th Sep 1930Box 24 \ 5  Scan330
Report comparing the efficiency of different radiator matrix types for the Phantom II model.24th Sep 1930Box 24 \ 5  Scan331
The efficiency of direct versus indirect radiator cooling systems with an accompanying graph.24th Sep 1930Box 24 \ 5  Scan332
Radiator efficiency, cooling performance, and an analysis of different radiator tube sizes.24th Feb 1930Box 24 \ 5  Scan333
Comparison of radiator tube designs, including round, square, and hexagon shapes, for efficiency and surface area.1st Jan 1938Box 24 \ 5  Scan334
Technical report discussing radiator tube thickness, engine temperatures, and conclusions for future radiator tests.24th Sep 1930Box 24 \ 5  Scan335
Analysis of the Chrysler radiator's design, noting its fine air passages and difficulty in cleaning.24th Sep 1930Box 24 \ 5  Scan336
Comparative table of radiator tube specifications and performance data.24th Sep 1930Box 24 \ 5  Scan337
Graph comparing the performance of three different types of radiator cores for slow-speed cooling.24th Sep 1930Box 24 \ 5  Scan338
Blank page with a 'Print Room' stamp.24th Sep 1930Box 24 \ 5  Scan339
Drawing and testing specifications for a square matrix tube.25th Sep 1930Box 24 \ 5  Scan340
Blank page with a purple ink stamp from the Print Room in Derby.25th Sep 1930Box 24 \ 5  Scan341
Improvements to the P.2 & 25HP car cooling system, including a new radiator design.29th Sep 1930Box 24 \ 5  Scan342
The development of a new square tube radiator and testing of louvres.30th Sep 1930Box 24 \ 5  Scan343
Proposed modifications to the vehicle cooling system, including the radiator and bonnet louvres.1st Oct 1930Box 24 \ 5  Scan344
Brief report on inconsistent test results for a square tube radiator being tested at Brooklands.7th Oct 1930Box 24 \ 5  Scan345
Requesting a repeat comparison test between a 6 m.m. parallel square tube radiator and a standard 6/7½ non-dented tube radiator.8th Oct 1930Box 24 \ 5  Scan346
Overheating complaints on 20 Hp. cars and the results of tests on a Phantom II to assess the cooling effect of a louvered bonnet.8th Oct 1930Box 24 \ 5  Scan347
Car overheating issues, referencing customer feedback and experiments with square tubed Gallay radiators.13th Oct 1930Box 24 \ 5  Scan348
Sixth Brooklands report on a series of tests on six different types of radiator core.4th Oct 1930Box 24 \ 5  Scan349
Radiator tube tests, comparing square, parallel, and turbulent air flow designs.4th Oct 1930Box 24 \ 5  Scan350
Technical comparison of different radiator tubes and a Gallay radiator core.4th Oct 1930Box 24 \ 5  Scan351
Radiator tube design, comparing samples from Rolls-Royce of America and others to improve cooling efficiency.14th Oct 1930Box 24 \ 5  Scan352
Comparison of square and round radiator tubes at full throttle and low speeds.14th Oct 1930Box 24 \ 5  Scan353
Comparative table of radiator performance and specifications under various test conditions.14th Oct 1930Box 24 \ 5  Scan354
Graph plotting hydraulic restriction of a tube radiator, showing delivery and pump suction pressure against engine RPM.14th Oct 1930Box 24 \ 5  Scan355
Superseded document from the Test Room, marked as a copy.14th Oct 1930Box 24 \ 5  Scan356
Graph detailing the results of water flow tests on a P.I. No. 7 unit with a standard radiator.14th Oct 1930Box 24 \ 5  Scan357
Page with a purple ink date stamp from the Test Room.14th Oct 1930Box 24 \ 5  Scan358
Improving radiator efficiency to prevent overheating by adding indentations to the tubes.14th Oct 1930Box 24 \ 5  Scan359
Design improvements for radiators, bonnets, overflow valves, and vents.14th Oct 1930Box 24 \ 5  Scan360
Efficiency of indented radiator tubes to solve an overheating issue.15th Oct 1930Box 24 \ 5  Scan361
On resolving overheating issues by modifying radiator tubes with indentations for increased efficiency.18th Oct 1930Box 24 \ 5  Scan362
Table of results from radiator performance tests conducted at Brooklands at various speeds and throttle settings.20th Oct 1930Box 24 \ 5  Scan363
Results of tests on different radiator tubes and louvred bonnets.20th Oct 1930Box 24 \ 5  Scan364
Improving radiator efficiency and cost by using 7 m.m. square tubes with bulges for turbulence.20th Oct 1930Box 24 \ 5  Scan365
Table comparing critical atmospheric temperatures for different radiator types causing overheating under various driving conditions.21th Oct 1930Box 24 \ 5  Scan366
Immediate implementation of a tube indentation modification to address an overheating issue.21th Oct 1930Box 24 \ 5  Scan367
The modification of radiator tubes with indents to resolve overheating issues.25th Oct 1930Box 24 \ 5  Scan368
Confirming agreement to proceed with a modification to radiator tubes regarding an overheating issue.27th Oct 1930Box 24 \ 5  Scan369
Square versus round radiator tubes and the design of bonnet vents and shutters.27th Oct 1930Box 24 \ 5  Scan370
Efficiency of square versus round radiator tubes and bonnet ventilation designs.30th Oct 1930Box 24 \ 5  Scan371
Radiator and acceleration tests conducted at Brooklands.31th Oct 1930Box 24 \ 5  Scan372
Test report on a thermostat marked 'A', detailing water temperature readings and jamming issues.20th Nov 1930Box 24 \ 5  Scan373
Diagrammatic scheme of a cooling plant for the proposed application of evaporative cooling to a Phantom II engine for use in tanks.1st Oct 1928Box 25 \ 1  Scan001
Potential use of the Phantom II engine for a new tank design.24th Oct 1929Box 25 \ 1  Scan002
Preliminary investigation into using an evaporatively cooled Phantom II engine as a power unit in tanks.31th Oct 1929Box 25 \ 1  Scan003
Calculations for heat dissipation and condenser design for Phantom engines.31th Oct 1929Box 25 \ 1  Scan004
Calculations and proposals for a cooling fan and tube block design.31th Oct 1929Box 25 \ 1  Scan005
Horsepower calculations and a proposal for an evaporative cooling system on a Phantom II engine.31th Oct 1929Box 25 \ 1  Scan006
Cover letter accompanying a brake horsepower curve chart for the standard production Phantom 11 engine for tanks.6th Nov 1929Box 25 \ 1  Scan007
Visit to Woolwich Arsenal and Short Bros. to discuss installing an evaporatively-cooled Phantom II engine in tanks.17th Jan 1930Box 25 \ 1  Scan008
Proposal for the installation of a Phantom II engine into a Mark I Light Tank, outlining the scheme and necessary tests.23th Apr 1930Box 25 \ 1  Scan009
Page 2 of a document detailing specifications for a condenser, air inlet, water header tank, and hot well pump.23th Apr 1930Box 25 \ 1  Scan010
Engine design considerations for oil circulation, exhaust pipes, and general accessibility.23th Apr 1930Box 25 \ 1  Scan011
Suggestion to use a J.1 Head on a 20/25 HP Tank Engine.9th Mar 1932Box 25 \ 1  Scan012
Test for an improved water pump for the 20/25 HP tank engine to increase cooling.11th Mar 1932Box 25 \ 1  Scan013
Confirming tests on a 20/25 HP Tank Engine, focusing on performance when inclined.11th Mar 1932Box 25 \ 1  Scan014
Oil leak tests conducted on an inclined 20/25 HP Tank Engine.14th Mar 1932Box 25 \ 1  Scan015
Test results for a new 20/25HP tank engine water pump, showing a 65% increase in water flow.22th Mar 1932Box 25 \ 1  Scan016
Graph of water flow versus engine RPM for a 3' diameter rotor, large volute, 25 HP pump.19th Mar 1932Box 25 \ 1  Scan017
Stamped document from the Print Room in Derby.22th Mar 1932Box 25 \ 1  Scan018
Oil heat and mechanical efficiency tests for a 20/25 tank engine.23th Mar 1932Box 25 \ 1  Scan019
Completed arrangement of a 3-gallon oil tank and fittings for a 20/25 HP tank engine.24th Mar 1932Box 25 \ 1  Scan020
The lubricant and service intervals for a 'Wilson' Gearbox in a Light Tank.31th Mar 1932Box 25 \ 1  Scan021
Schedule of tests for running in and evaluating a Light Tank's gearbox, transmission, and installation.6th Apr 1932Box 25 \ 1  Scan022
List of proposed engine and tank testing procedures, including gradient, routine, and bench tests.22th Apr 1932Box 25 \ 1  Scan023
Test results for a tank oil pump, detailing delivery rates and relief pressures.22th Apr 1932Box 25 \ 1  Scan024
Blueprint graph plotting pump delivery against pump speed for a tank oil pump.5th Apr 1932Box 25 \ 1  Scan025
Heavily faded typed document with a purple ink stamp from the print room.23th Apr 1932Box 25 \ 1  Scan026
Recent cooling trials of a 20/25 HP engine in a light tank.6th Sep 1932Box 25 \ 1  Scan027
Details on spring-loading radiators, fan horsepower, and a War Office request for valve schematics.6th Sep 1932Box 25 \ 1  Scan028
Performance graph for a 20/25 HP engine showing BHP and temperatures against RPM, with and without a fan.5th Sep 1932Box 25 \ 1  Scan029
The reverse of a folded document with a Print Room receipt stamp and handwritten note.6th Sep 1932Box 25 \ 1  Scan030
Dynamo failures experienced in light tanks fitted with 20/25 HP engines.20th Sep 1935Box 25 \ 1  Scan031
Investigation into cable screening failures, specifically braiding damage and insulation perishing on tanks.20th Mar 1935Box 25 \ 1  Scan032


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