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
Explaining the design compromise of the Phantom II's cooling system in response to overheating complaints.1st Sep 1930Box 15 \ 1  Scan344
Instructions regarding the engine cooling system, radiator shutters, warning lamp, and bonnet ventilation.2nd Sep 1938Box 15 \ 1  Scan345
Guidance on interpreting the red engine warning lamp in various weather conditions.2nd Sep 1930Box 15 \ 1  Scan346
Request to build a radiator matrix for the 25-EX car for improved efficiency.3rd Sep 1930Box 15 \ 1  Scan347
Standardisation of chassis parts relating to the thermometer warning light operating temperature.1st Aug 1930Box 15 \ 1  Scan348
Single point radiator mounting for the 24-EX model, intended as a fix for 'jelliers' complaints.5th Sep 1930Box 15 \ 1  Scan349
Sketch of Radiator Side Fittings on a 24EX, a combination of schematics N.Sch.3062 and N.Sch.3059.5th Sep 1923Box 15 \ 1  Scan350
Recommending the fitment of standardised single point radiator mountings to cure 'jellying' on specific chassis.5th Sep 1930Box 15 \ 1  Scan351
Modifications to the radiator shutter bottom bearings for the 20/25HP model.9th Jun 1930Box 15 \ 1  Scan352
Sources of friction in radiator shutters and proposing a solution.8th Sep 1930Box 15 \ 1  Scan353
Blueprint of shutter operating toggles.8th Sep 1930Box 15 \ 1  Scan354
Date stamp from the Print Room in Derby.8th Sep 1930Box 15 \ 1  Scan355
Test report on the performance of radiator shutters fitted with a thermostat and spring.8th Sep 1930Box 15 \ 1  Scan356
Request to modify car 22-EX for radiator tests, specifically to change the radiator mounting.9th Sep 1930Box 15 \ 1  Scan357
Problems with the Phantom II Left Hand Chassis following 10,000 miles of testing.9th Sep 1930Box 15 \ 1  Scan358
Modifications to the clutch, carburetter, and brakes for experimental cars.9th Sep 1930Box 15 \ 1  Scan359
Modifications to the Phantom II radiator tubes and the resulting impact on cooling performance.9th Sep 1930Box 15 \ 1  Scan360
Concluding page of a report comparing a subject to the original Phantom II, stating a complete report is in preparation.11th Sep 1930Box 15 \ 1  Scan361
The production and testing of square tube radiators using brass and copper.11th Sep 1930Box 15 \ 1  Scan362
The production status of radiator tubes ordered from I.C.I. Metals Ltd. for the M2 Series chassis.11th Sep 1930Box 15 \ 1  Scan363
Radiator thermometer test with results at 30 and 45 m.p.h.12th Sep 1930Box 15 \ 1  Scan364
Replacing experimental parts with standardised centre point radiator mountings on specific cars.15th Sep 1930Box 15 \ 1  Scan365
Urgency of testing a non-spilling radiator filler cap to solve a water pumping issue.15th Sep 1930Box 15 \ 1  Scan366
Development of a new, larger, non-spilling radiator filler cap and proposing it become standard for the N.2 series.15th Sep 1930Box 15 \ 1  Scan367
Actions on various batches of radiator tubes for the 40/50 HP N.2 Series Chassis.15th Sep 1930Box 15 \ 1  Scan368
Design requirements for thermostatically controlled radiator shutters and cooling system improvements.16th Sep 1930Box 15 \ 1  Scan369
Radiator cooling problems on the Phantom II model, specifically an alteration that increased running temperatures.16th Sep 1930Box 15 \ 1  Scan370
Radiator cooling issues on Phantom I and II models, leading to the adoption of a more efficient square tube radiator.18th Sep 1930Box 15 \ 1  Scan371
Use of unpolished 'Staybrite' shutters on experimental cars to test their appearance and durability.20th Sep 1930Box 15 \ 1  Scan372
Modification to the thermostat linkage to resolve issues with radiator shutter friction.20th Sep 1930Box 15 \ 1  Scan373
Status of orders and conversions for radiator tubes for the 40/50-HP Chassis N2 Series.23th Sep 1930Box 15 \ 1  Scan374
Letter from I.C.I. Metals Limited concerning the production, conversion, and pricing of tubes.22th Sep 1930Box 15 \ 1  Scan375
Request to fit a dented tube matrix radiator to car 19-EX to be sent to Brooklands.23th Sep 1930Box 15 \ 1  Scan376
Correcting a prior analysis of radiator efficiency for the Phantom II, specifically regarding an error in tube size measurement.24th Sep 1930Box 15 \ 1  Scan377
Radiator cooling efficiency, comparing direct versus indirect methods, with a supporting graph.24th Sep 1930Box 15 \ 1  Scan378
Radiator efficiency, heat dissipation, and a comparison of different radiator tube types.24th Sep 1930Box 15 \ 1  Scan379
Technical comparison of different radiator tube designs, focusing on shape, surface area, and thickness.24th Sep 1930Box 15 \ 1  Scan380
Improving engine cooling performance by modifying radiator tubes and assessing temperature changes.24th Sep 1930Box 15 \ 1  Scan381
Continued page discussing the success of the Chrysler radiator design and its potential drawbacks.24th Sep 1930Box 15 \ 1  Scan382
Comparative table analyzing the performance of various radiator tube designs.24th Sep 1930Box 15 \ 1  Scan383
Graph comparing the performance of different types of radiator cores for slow-speed cooling.24th Sep 1930Box 15 \ 1  Scan384
Blank document page with a Print Room reception stamp.24th Sep 1930Box 15 \ 1  Scan385
Drawing of a square matrix tube with annealing and pressure test instructions.20th Sep 1927Box 15 \ 1  Scan386
With a sketch comparing a parallel tube and a bulged tube.25th Sep 1930Box 15 \ 1  Scan387
The inspection of radiator tubes to determine variations in size and ovality.25th Sep 1930Box 15 \ 1  Scan388
Table detailing measurements and tolerances for radiator matrix tubes across various production batches.30th Jan 1931Box 15 \ 1  Scan389
Request to build a 6mm parallel square tube radiator for the 19-EX car, for testing at Brooklands.29th Sep 1930Box 15 \ 1  Scan390
Improvements to the radiator and cooling system for the P.2 & 25HP cars.29th Sep 1930Box 15 \ 1  Scan391
Holding material for a new square type radiator and trials comparing horizontal vs vertical louvres.30th Sep 1930Box 15 \ 1  Scan392
Modifications and feedback on a vehicle's cooling system.30th Oct 1930Box 15 \ 1  Scan393
Corrosion issues with unpolished staybright radiator shutters and experimenting with different finishing methods.3rd Oct 1930Box 15 \ 1  Scan394
Inconsistent test results for a square tube radiator at Brooklands.7th Oct 1930Box 15 \ 1  Scan395
Requesting a comparative test between two radiator types and their fitting to car 20-EX for towing tests.8th Oct 1930Box 15 \ 1  Scan396
Car overheating issues, referencing Gallay radiators and feedback from a client in Italy.13th Oct 1930Box 15 \ 1  Scan397
Table showing the results of various radiator and louvre configurations tested at different speeds.14th Oct 1930Box 15 \ 1  Scan398
Comparison of weight and dimensions between solid strip and rolled strip radiator tubes.14th Oct 1930Box 15 \ 1  Scan399
Proposed solution for overheating by improving radiator efficiency with indented tubes.13th Oct 1930Box 15 \ 1  Scan400
Sixth Brooklands Report on a series of tests conducted on six different types of radiator core.14th Oct 1930Box 15 \ 1  Scan401
Continuation of a report detailing tests on various radiator tube designs to improve performance and save weight.14th Oct 1930Box 15 \ 1  Scan402
Report comparing the efficiency of different radiator tubes and a Gallay radiator.4th Oct 1930Box 15 \ 1  Scan403
Radiator tube tests, comparing samples from Rolls-Royce of America with other designs.14th Oct 1930Box 15 \ 1  Scan404
Performance comparison of square and round radiator tubes at full throttle and low speeds.14th Oct 1930Box 15 \ 1  Scan405
Comparative analysis of different radiator types, detailing performance under various conditions and physical specifications.14th Oct 1930Box 15 \ 1  Scan406
Graph of water flow tests on a PII No 7 unit with a standard radiator.14th Oct 1930Box 15 \ 1  Scan407
Heavily faded internal document with a purple company stamp.14th Oct 1930Box 15 \ 1  Scan408
Fitting radiators with different types of dented round and square tubes.4th Oct 1930Box 15 \ 1  Scan409
Improvements to radiators and bonnets, including square tubes, overflow valves, and bonnet vents.14th Oct 1930Box 15 \ 1  Scan410
Efficiency improvements gained by adding indentations to radiator tubes to solve overheating issues.15th Oct 1930Box 15 \ 1  Scan411
Proposing an experimental modification for the 40/50 HP Radiator Suspension Spring, Type HS.299.15th Oct 1930Box 15 \ 1  Scan412
Overheating issues and radiator modifications on the Phantom II model.18th Oct 1930Box 15 \ 1  Scan413
Results of radiator tests, comparing different tube and bonnet designs.20th Oct 1930Box 15 \ 1  Scan414
Radiator design, comparing 7mm square tubes with round tubes for improved performance and cost-effectiveness.20th Oct 1930Box 15 \ 1  Scan415
Table comparing critical atmospheric temperatures for different radiator types under various driving conditions.21th Oct 1930Box 15 \ 1  Scan416
Immediate implementation of a tube indentation modification to prevent overheating.21th Oct 1930Box 15 \ 1  Scan417
The disposal of two custom-built, more efficient radiators.23th Oct 1930Box 15 \ 1  Scan418
Letter regarding radiator tube gauges and suspension 'pitching' issues for the Phantom II model.24th Oct 1930Box 15 \ 1  Scan419
Fitting and testing of new square and round tube radiator matrices.24th Oct 1930Box 15 \ 1  Scan420
Recommending the immediate adoption of indented radiator tubes to solve an overheating issue.25th Oct 1930Box 15 \ 1  Scan421
Criticisms and potential improvements for vehicle bonnets and radiators.25th Oct 1930Box 15 \ 1  Scan422
Design suggestions for a detachable filler cap, horizontal louvres, and bonnet sides.25th Oct 1930Box 15 \ 1  Scan423
Request to fit a radiator with a new W.W. scheme of centre point mounting to the 'Bump' chassis for testing.27th Oct 1930Box 15 \ 1  Scan424
Agreeing to proceed with a modification to radiator tubes to solve overheating issues.27th Oct 1930Box 15 \ 1  Scan425
Design and cost of square versus round radiator tubes and advocating for modern bonnet shutters.27th Oct 1930Box 15 \ 1  Scan426
Performance of square versus round radiator tubes and bonnet ventilation design.30th Oct 1930Box 15 \ 1  Scan427
Radiator and acceleration test results from Brooklands.31th Oct 1930Box 15 \ 1  Scan428
Quarterly report on customer complaints regarding radiators, fabric couplings, and shock absorbers.3rd Nov 1930Box 15 \ 1  Scan429
Stock and availability of radiators for the Phantom II.5th Nov 1930Box 15 \ 1  Scan430
Results of radiator tests comparing different tube designs at Brooklands.6th Nov 1930Box 15 \ 1  Scan431
Continued memorandum discussing the use of wind tunnels for winter testing.6th Nov 1930Box 15 \ 1  Scan432
The non-production of the E.81389 tube for the Phantom II square radiator, recommending an order be placed.10th Nov 1930Box 15 \ 1  Scan433
Two complaints of leaking radiators found during a visit to Cricklewood.20th Nov 1930Box 15 \ 1  Scan434
Test report on a thermostat marked 'A', detailing water temperature readings and a jamming failure which caused the engine to boil.20th Nov 1930Box 15 \ 1  Scan435
Evolution of induction systems and carburetter heating, including thermostatically controlled shutters.25th Nov 1930Box 15 \ 1  Scan436
Thermostat settings and 'B' filling for the Phantom II model.29th Nov 1930Box 15 \ 1  Scan437
The design and layout for B, C and D type pedals, noting differences from the 'W' series.1st Nov 1925Box 15 \ 2  Scan001
Layout of the accelerator pedal for 'C' and 'D' type vehicles, referencing schematic N.sch.2073.11th Nov 1925Box 15 \ 2  Scan002
Various positions of the accelerator pedal for the 'W' series, with reference to the Silver Ghost and New Phantom models.5th Nov 1925Box 15 \ 2  Scan003
Proposal for the construction of a brake pedal, referencing drawing N.sch.2141.10th Feb 1926Box 15 \ 2  Scan004
Pedal arrangement for the EAC-7 model, referencing schematics and clutch travel modifications.31th May 1926Box 15 \ 2  Scan005
Investigation into lost foot pedal movement and elasticity in the braking system.28th Jan 1927Box 15 \ 2  Scan006


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