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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The return of an unsatisfactory demonstration wheel and tyre to the Dunlop Rubber Co Ltd.24th Sep 1925Box 42 \ 1  Scan004
Agreement with the Dunlop Rubber Co. Ltd. for the supply of wheels and tyres at half-price for testing purposes.25th Sep 1925Box 42 \ 1  Scan005
Letter concerning the supply and delivery of Dunlop wheels and tyres for testing on 40/50 HP and 20 HP chassis.28th Sep 1925Box 42 \ 1  Scan006
Letter regarding the dispatch of 18 extra heavy covers and tubes for testing in France.23th Sep 1925Box 42 \ 1  Scan007
Use of lighter wheels with well base rims for a 10,000 miles test in France.30th Sep 1925Box 42 \ 1  Scan008
Delayed delivery of wire wheels fitted with new triple stud tyres.1st Oct 1925Box 42 \ 1  Scan009
Confidential letter from the Dunlop Co. concerning new season's price lists and the introduction of Wired-on Balloon tyres with Wellbase Rims.1st Oct 1925Box 42 \ 1  Scan010
Schedule from Dunlop Rubber Co. listing high pressure wired car tyres and their equivalents.30th Sep 1925Box 42 \ 1  Scan011
Request to obtain 5 Dunlop Disc Wheels for experimental purposes, including cost and return conditions.15th Oct 1925Box 42 \ 1  Scan012
Correspondence regarding the supply and testing of Dunlop wheels and tyres.22th Oct 1925Box 42 \ 1  Scan013
Disadvantages of using artillery wheels due to their weight and lack of strength.24th Oct 1925Box 42 \ 1  Scan014
Confirmation of Dunlop supplying detachable wire wheels and tyres for testing on a 40/50 HP chassis.26th Oct 1925Box 42 \ 1  Scan015
Letter to Dunlop regarding the standardisation of wheel rims and tyre compatibility.31th Oct 1925Box 42 \ 1  Scan016
Request for an opinion on the testing of 6 inch high-pressure Dunlop tyres for Lord Montagu.6th Dec 1925Box 42 \ 1  Scan017
Tyre options from Dunlop and Michelin, and arrangements for a car in France.12th Jun 1925Box 42 \ 1  Scan018
Letter from Dunlop Rubber Co. Ltd. regarding the market dominance of 21-inch rims for low-pressure tyres.5th Nov 1925Box 42 \ 1  Scan019
Decision to use standard rims and tyres instead of a special Dunlop model due to availability issues for foreign markets.25th Nov 1925Box 42 \ 1  Scan020
Specification sheet detailing the weights of Dunlop standard and well-base wheels for the Goshawk model.19th Nov 1925Box 42 \ 1  Scan021
Specification sheet detailing the weights of Dunlop standard and wheelbase wheel assemblies for the 40/50 HP model.19th Nov 1925Box 42 \ 1  Scan022
Follow-up request for information regarding high-pressure tyres on well-base rims for Lord Montagu.30th Nov 1925Box 42 \ 1  Scan023
Internal query regarding tests, results, and customer advice for Dunlop Tyres and Well-base Rims.13th Jan 1926Box 42 \ 1  Scan024
Providing feedback on the testing and performance of well-base rims and tyres.14th Jan 1926Box 42 \ 1  Scan025
Replying to questions regarding the performance, testing, and future standardization of Dunlop tyres and well-base rims.14th Jan 1926Box 42 \ 1  Scan026
Letter to Dunlop Rubber Co. providing feedback on the performance of well base wheels and tyres, noting issues with tread noise.25th Jan 1926Box 42 \ 1  Scan027
The performance of Dunlop Cord well base wheels and tyres on an 8-EX car.25th Jan 1926Box 42 \ 1  Scan028
The condition of tyres and wheels, detailing punctures, mileage, wear, and a broken spoke.9th Feb 1926Box 42 \ 1  Scan029
Letter to The Dunlop Rubber Co. regarding the performance of well base tyres and rims, highlighting noise issues with a new tread.9th Feb 1926Box 42 \ 1  Scan030
The subject of high-speed steering wobbles in vehicles.9th Feb 1926Box 42 \ 1  Scan031
Continued report discussing vehicle 'shimmy' or 'wobble' issues, particularly concerning new well base tyres.1st Feb 1926Box 42 \ 1  Scan032
The unsatisfactory testing of well-base rims and tyres, advising against fitting them due to the risk of high-speed wobbles.1st Feb 1926Box 42 \ 1  Scan033
The effectiveness of hydraulic shock absorbers in eliminating high-speed steering wobbles.9th Feb 1926Box 42 \ 1  Scan034
Letter from Dunlop discussing the noise produced by their non-skidding tyres.16th Feb 1926Box 42 \ 1  Scan035
Cancellation of supplying well base rims and tyres due to front wheel wobble issues.17th Feb 1926Box 42 \ 1  Scan036
Standardisation of well base wheels and tyres, addressing issues like high-speed steering wobble and tyre noise.19th Feb 1926Box 42 \ 1  Scan037
Letter from Dunlop Rubber Co. regarding tyre noise and the non-skidding effect of different tread designs.16th Feb 1926Box 42 \ 1  Scan038
Comparative tests for high-speed steering wobbles using new well base rims and non-skid tyres.20th Feb 1926Box 42 \ 1  Scan039
Different tyre sizes and their impact on wheel wobble tests.2nd Feb 1926Box 42 \ 1  Scan040
From the Experimental Department regarding well-base tyres, rims, and hydraulic dampers in relation to wheel wobble on the Phantom.23th Feb 1926Box 42 \ 1  Scan041
Meeting with Dunlop to discuss issues with noisy tyres, front wheel wobble, and the price of wheels.23th Feb 1926Box 42 \ 1  Scan042
Blueprint comparing specifications of various Dunlop tyres and well base wheels.26th Feb 1926Box 42 \ 1  Scan043
Letter to The Dunlop Rubber Co. Ltd. regarding results of tyre observations and arranging a visit.5th Mar 1926Box 42 \ 1  Scan044
Standardisation of oil hydraulic shock dampers and the consequential arrangements with Dunlop Co. for wheel supply.15th Mar 1926Box 42 \ 1  Scan045
Visit to Dunlop to discuss their triple stud tread tyres, focusing on noise and wear characteristics.15th Mar 1926Box 42 \ 1  Scan046
Comparison of different tyre types, their construction, and performance characteristics for 40/50 HP and 20 HP models.15th Mar 1926Box 42 \ 1  Scan047
Tyre performance, comparing different types regarding comfort and high-speed wobble.8th Mar 1926Box 42 \ 1  Scan048
Proposing a 10,000-mile test for Dunlop tyres and arranging for their procurement in France.8th Mar 1926Box 42 \ 1  Scan049
Internal memorandum discussing tyre choices and proposing a switch to larger, lower-pressure tyres to improve ride comfort and compete with other manufacturers.24th Mar 1926Box 42 \ 1  Scan050
The adoption of wheels with well base rims and production scheduling with the Dunlop Company.19th Apr 1926Box 42 \ 1  Scan051
Letter discussing discrepancies in Dunlop's blueprints for well-base rims and their impact on wheel offset and wobble.22th Apr 1926Box 42 \ 1  Scan052
10,000-mile test on 20 HP low-pressure tyres on well-base rims.23th Apr 1926Box 42 \ 1  Scan053
Query about the standardisation sheet for semi-low pressure tyres on well-base wheels, as a chassis is being held up.20th Apr 1926Box 42 \ 1  Scan054
Standardisation of well base wheels and tyres for the 20 HP model after road testing.1st Apr 1926Box 42 \ 1  Scan055
10,000-mile test of 20 HP low pressure tyres on well base rims.22th Apr 1926Box 42 \ 1  Scan056
Implementation of well-base rims on the 20 HP and 40/50 HP chassis.28th Apr 1926Box 42 \ 1  Scan057
High-speed wobbles experienced with well-base rims and medium pressure tyres, comparing the 20 HP and 40/50 HP models.28th Apr 1925Box 42 \ 1  Scan058
Telephone message from Dunlop Co. regarding difficulties in manufacturing wire wheels with wellbase rims.4th May 1926Box 42 \ 1  Scan059
Measurements and standards for wire wheels with well-base rims for 20 HP and 40/50 HP chassis.6th May 1926Box 42 \ 1  Scan060
Blueprint comparing dimensions and load ratings for four different tyre types and sizes.14th May 1926Box 42 \ 1  Scan061
Blank page with a Print Room ink stamp.14th May 1926Box 42 \ 1  Scan062
Standardisation of chassis parts, specifically well base rims and 5 1/4' tyres.4th May 1926Box 42 \ 1  Scan063
Correction notice from Dunlop regarding the classification and description of certain tyres.1st Jun 1926Box 42 \ 1  Scan064
Standardisation Sheet No.3809, confirming the safety of fitting low-pressure tyres to 20 HP cars without hydraulic dampers.9th Jun 1926Box 42 \ 1  Scan065
Essential need for hydraulic dampers on the 20 HP model to prevent high-speed wobbles.11th Jun 1926Box 42 \ 1  Scan066
Continued memorandum regarding the adoption of a standardisation sheet by company engineers.1st Jul 1926Box 42 \ 1  Scan067
Supply and types of wheels for the Phantom model, including timelines for shock dampers.1st Jul 1926Box 42 \ 1  Scan068
Choice of wheel and tyre type for the 40/50 HP chassis.8th Jul 1926Box 42 \ 1  Scan069
Replacing wire wheels with well-base rims on Chassis 12-EX due to them fouling the brake drums.20th Jul 1926Box 42 \ 1  Scan070
Request to obtain Dunlop tyres for tests on a 12-EX car in France.20th Aug 1926Box 42 \ 1  Scan071
Standardisation of wheels with well base rims and 6.75 inch tyres.6th Sep 1926Box 42 \ 1  Scan072
The change from Traction Tread to a new triple stud pattern for 6.75' Dunlop tyres, noting performance issues and further modifications.21th Sep 1926Box 42 \ 1  Scan073
High-speed wobble issues with well-based wheels and collaboration with Dunlop for improved tyre tests.21th Sep 1926Box 42 \ 1  Scan074
Clarifying the cost calculations for wheels, tyres, and hubs detailed in Standardisation Sheet No. X.3809.29th Sep 1926Box 42 \ 1  Scan075
Confirming a car will be sent to Derby to be fitted with hydraulic dampers, well-base wheels, and new tyres.8th Oct 1926Box 42 \ 1  Scan076
Exchange of wheels and tyres for specific test vehicles.14th Oct 1926Box 42 \ 1  Scan077
Collection of six well base wheels off car 88-LC.18th Oct 1926Box 42 \ 1  Scan078
Further tests on well base wheels for the 88-LC Trials Saloon and Mr. Royce's car.19th Oct 1926Box 42 \ 1  Scan079
Standardization of tyres, rims, and front axle for the Phantom C.2 Series.21th Oct 1926Box 42 \ 1  Scan080
The transition from standard wheels to well-base rims and balloon tyres, and the policy for using up old stock.25th Oct 1925Box 42 \ 1  Scan081
Order of six traction tread tyres from Messrs. Dunlops.11th Nov 1926Box 42 \ 1  Scan082
Joint position on inner tubes supplied by the Dunlop Co. for wire wheels with wellbase rims.29th Nov 1926Box 42 \ 1  Scan083
The joint position on inner tubes for Phantom wire wheels with well base rims.30th Nov 1926Box 42 \ 1  Scan084
Supply and standardisation of well base rims and medium pressure tyres for a Phantom chassis.30th Nov 1926Box 42 \ 1  Scan085
Standardisation of 6.75' traction tread well base rims on the old type axle to increase riding comfort.29th Nov 1926Box 42 \ 1  Scan086
Standardisation sheet for 6.75 traction well base wheels and tyres with costings and conditions of application.27th Aug 1927Box 42 \ 1  Scan087
Internal order for six Dunlop outer covers and six inner tubes for a 20 HP car, chassis 10-G-111.27th Aug 1927Box 42 \ 1  Scan088
Letter to The Dunlop Rubber Co. postponing a demonstration of well base rims and tyres due to the Olympia Show.21th Oct 1927Box 42 \ 1  Scan089
Letter to The Dunlop Rubber Co. arranging a meeting at Fort Dunlop.26th Oct 1927Box 42 \ 1  Scan090
Tests to ascertain if standard balloon tyres leave the well base rim when deflated.29th Oct 1927Box 42 \ 1  Scan091
Tyre and rim experiments, detailing performance during punctures, high-speed cornering, and potential safety modifications.17th Oct 1927Box 42 \ 1  Scan092
Deflation tests performed on large tyres.17th Oct 1927Box 42 \ 1  Scan093
Comparing the average mileage of well base tyres against straight-sided cord tyres.17th Nov 1927Box 42 \ 1  Scan094
And comparing the mileage and wear of different tyre types.28th Nov 1927Box 42 \ 1  Scan095
List detailing the weights of various wheel and tyre combinations for a 20 HP model.19th Aug 1928Box 42 \ 1  Scan096
Carburetter options and procurement for the Eagle 16 engine.11th Sep 1925Box 42 \ 1  Scan097
Mr. Royce's instructions for testing the RR. E.16 engine without a supercharger, including alternative damping and carburetion methods.11th Dec 1925Box 42 \ 1  Scan098
Continued memo discussing temporary instruments and the aim of running an engine without the supercharger.15th Dec 1925Box 42 \ 1  Scan099
Reminder about a proposal to test an Eagle XVI engine with four carburetters after deleting the supercharger.15th Dec 1925Box 42 \ 1  Scan100
Two schemes for mounting carburettors and induction pipes on an Eagle 16 engine for bench testing.30th Dec 1925Box 42 \ 1  Scan101
Modifications to the water connections for the Eagle 16 engine.14th Nov 1925Box 42 \ 1  Scan102
Blueprint drawing of induction pipes and engine mounting for the Eagle 16 engine.14th Nov 1925Box 42 \ 1  Scan103


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