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
Secret memo regarding arrangements to collect a Hispano car from Barkers.13th Nov 1923Box 22 \ 1  Scan019
Testing and modifications of a 4-wheel brake system.14th Nov 1923Box 22 \ 1  Scan020
Comparing the weights and braking characteristics of two 40/50 HP cars and a Hispano Suiza.15th Nov 1923Box 22 \ 1  Scan021
Request to obtain an instruction book for a Hispano car, either permanently or on loan.16th Nov 1923Box 22 \ 1  Scan022
Clarifying a request for information on pedal pressure for braking, referencing Hispano and Isotta.17th Nov 1923Box 22 \ 1  Scan023
Extract from a letter by Barker & Co. Ltd regarding a delay in handing over a Hispano Suiza car.19th Nov 1923Box 22 \ 1  Scan024
Initial report on the Hispano car, outlining its defects and design characteristics compared to an RR car.21th Nov 1923Box 22 \ 1  Scan025
Development and issues of a front-wheel braking system, proposing a new torque member design.28th Nov 1923Box 22 \ 1  Scan026
Experiment measuring pivot movement on a Hispano Suiza car with front brakes applied.26th Nov 1923Box 22 \ 1  Scan027
Inquiring about the petrol consumption of the Hispano car for comparison.28th Nov 1923Box 22 \ 1  Scan028
Investigation into the Hispano's bonnet louvre design and its effect on engine noise and water temperature.28th Nov 1923Box 22 \ 1  Scan029
The particulars of brakes on a Hispano car.29th Nov 1923Box 22 \ 1  Scan030
Graph showing axle movement under load for a 'Hispano' model in two positions.29th Nov 1923Box 22 \ 1  Scan031
Design drawing for a Hispano Brake Shoe with measurements.1st Feb 1924Box 22 \ 1  Scan032
Hand-drawn diagram showing the layout and dimensions of a Hispano front brake system.1st Feb 1924Box 22 \ 1  Scan033
Schematic diagram of the Hispano rear brake operating mechanism, showing levers, cams, and dimensions.24th Jan 1923Box 22 \ 1  Scan034
Diagram of the Hispano front wheel brake linkage system with an associated movement table.29th Nov 1923Box 22 \ 1  Scan035
Referencing a Hispano car.29th Nov 1923Box 22 \ 1  Scan036
Hand-drawn sketch with dimensions of a Hispano Brake Shoe.21th Jan 1929Box 22 \ 1  Scan037
Diagram illustrating the linkage and operation of a Hispano rear brake system.21th Jan 1929Box 22 \ 1  Scan038
Drawing illustrating the Hispano front wheel brake linkage mechanism.25th Nov 1923Box 22 \ 1  Scan039
Technical drawing of a Hispano front brake with annotations and dimensions.25th Nov 1923Box 22 \ 1  Scan040
From R. to H.S. requesting an investigation into front road spring breakages and steering gear flexibility.30th Nov 1923Box 22 \ 1  Scan041
Requesting further particulars on Hispano-Suiza brakes, specifically the cam position and 'servo' mechanism.1st Dec 1923Box 22 \ 1  Scan042
Petrol consumption of a Hispano car.12th Dec 1923Box 22 \ 1  Scan043
Consumption data for an R.R. vehicle under conditions similar to those of a Hispano car.3rd Dec 1923Box 22 \ 1  Scan044
Comparing the fuel consumption of a Hispano and a standard new 40/50 chassis.4th Dec 1923Box 22 \ 1  Scan045
Issues with the floating fulcrum brake, detailing tests to reduce jaggering.12th Jul 1923Box 22 \ 1  Scan046
Tests conducted on the Epicyclic Equalizer, Hispano brakes, and Pedal Pressure.1st Dec 1923Box 22 \ 1  Scan047
Brief memo regarding the licence for a Hispano car.7th Dec 1923Box 22 \ 1  Scan048
Request for the return of 'RAC' and 'AA' badges belonging to the previous owner of a Hispano-Suiza car.11th Dec 1923Box 22 \ 1  Scan049
Request for a new oversized piston for a Hispano car, Chassis No. 10482, and confirmation of sending two badges.12th Dec 1923Box 22 \ 1  Scan050
List of tools for a Hispano Suiza vehicle, categorized by storage location.12th Dec 1923Box 22 \ 1  Scan051
Continued list of tools and spare parts.20th Dec 1923Box 22 \ 1  Scan052
Requesting the return of servo parts and a 'Braking' file, following a Sales request to test a Hispano car.20th Dec 1923Box 22 \ 1  Scan053
Follow-up memo requesting an update on obtaining a new piston for a Hispano car.20th Dec 1923Box 22 \ 1  Scan054
Confirming the decision to manufacture the piston for the Hispano car in-house.28th Dec 1923Box 22 \ 1  Scan055
From CJ to Hs discussing plans to test brakes on a Hispano and a 40/50 HP chassis, including a proposed road test in France.28th Dec 1923Box 22 \ 1  Scan056
Post office telegram regarding the return of a Hispano servo part.16th Jan 1924Box 22 \ 1  Scan057
The dispatch of delayed Hispano servo parts and the return of a file on braking.1st Jan 1924Box 22 \ 1  Scan058
Enquiry from Barkers about receiving Hispano and Isotta-Fraschini cars for sale.3rd Jan 1924Box 22 \ 1  Scan059
Letter arranging a car road test and comparison with a Hispano car's brakes.15th Jan 1924Box 22 \ 1  Scan060
Request to urgently obtain a 3-month license for a Hispano car, number XM.3790.15th Jan 1924Box 22 \ 1  Scan061
Hispano car, detailing issues with the clutch, engine, and steering.16th Jan 1924Box 22 \ 1  Scan062
Calculations and diagram for the Goshawk Clutch.16th Jan 1924Box 22 \ 1  Scan063
Drawing and calculation sheet for the Hepano Clutch and Bingo operating mechanism.16th Jan 1924Box 22 \ 1  Scan064
Technical drawing showing multiple views and cross-sections of an axle pivot.16th Jan 1924Box 22 \ 1  Scan065
Technical drawing showing three views of a cylinder block.16th Jan 1924Box 22 \ 1  Scan066
Arrangement drawing of a clutch, featuring a top half sectional view and a front view.16th Jan 1924Box 22 \ 1  Scan067
Diagram showing the distance between the tyre centre and pivot pin centre when in contact with the road.16th Jan 1924Box 22 \ 1  Scan068
Engineering drawing of a connecting rod showing plan, section, and end views with dimensions.16th Jan 1924Box 22 \ 1  Scan069
Detailed engineering drawing of a clutch assembly, showing multiple views and dimensions.8th Jan 1924Box 22 \ 1  Scan070
Detailed technical drawing of a crankshaft with dimensional annotations.8th Jan 1924Box 22 \ 1  Scan071
Confirming travel arrangements to Derby, with the intention of bringing a Hispano car.16th Jan 1924Box 22 \ 1  Scan072
Hispano test run, observations on the driver's controls, and alternative travel plans due to a potential railway strike.18th Jan 1924Box 22 \ 1  Scan073
The performance and characteristics of the Hispano-Suiza four-wheel brake system.21th Jan 1924Box 22 \ 1  Scan074
Page discussing the superiority and necessity of 4-wheel brake systems for high-class cars.23th Jan 1924Box 22 \ 1  Scan075
Internal request for steering and turning circle specifications for a Hispano-Suiza.23th Jan 1924Box 22 \ 1  Scan076
Order for searchlight lamps for a Hispano-Suiza car.27th Jan 1924Box 22 \ 1  Scan077
The road testing of the brakes on a Hispano car.29th Jan 1924Box 22 \ 1  Scan078
Requesting a braking system test be arranged for a Hispano car on an incline.29th Jan 1924Box 22 \ 1  Scan079
Brake testing a 40/50 HP car with cast iron servo liners, noting noise issues and comparison to the Hispano system.30th Jan 1924Box 22 \ 1  Scan080
Calculation comparing the unit pressure on servo shoes with Hispano servo shoes.30th Jan 1924Box 22 \ 1  Scan081
Testing of Hispano brakes on a car running backwards on a gradient.30th Jan 1924Box 22 \ 1  Scan082
Letter praising the performance of a 'Type Boulogne' Hispano motor car.1st Feb 1924Box 22 \ 1  Scan083
Letter discussing the performance of a 'Type Boulogne' car, comparing it to a Hispano, and arranging a test drive.2nd Feb 1924Box 22 \ 1  Scan084
Letter discussing the performance and qualities of 'Hispano' brakes and engines compared to other vehicles.2nd Feb 1924Box 22 \ 1  Scan085
Potential test drive of a Hispano Suiza special model car.4th Feb 1924Box 22 \ 1  Scan086
Initial impressions of the new Hispano-Suiza 'Type Boulogne' and comparing its performance to Rolls-Royce cars.1st Feb 1924Box 22 \ 1  Scan087
Car's braking system and its suitability for the luxury market.2nd Feb 1924Box 22 \ 1  Scan088
Comparing Rolls Royce and Hispano cars.2nd Feb 1924Box 22 \ 1  Scan089
The hill climbing performance of a 40/50 HP car in North Devon, comparing it to a Hispano Suiza.12th Jul 1923Box 22 \ 1  Scan090
Braking tests conducted in North Devon on Porlock and Countisbury hills.12th Jul 1923Box 22 \ 1  Scan091
Comparison table of hill climbing tests in North Devon for a 40/50 HP model and a Hispano Suiza.12th Jul 1923Box 22 \ 1  Scan092
Comparison of brake tests between the E.A.C. high-speed servo and Hispano systems in North Devon.7th Feb 1924Box 22 \ 1  Scan093
Steering specifications and turning circles for a Hispano model.7th Feb 1924Box 22 \ 1  Scan094
With drawings detailing a Hispano Suiza steering mechanism.7th Feb 1924Box 22 \ 1  Scan095
Comparing the weights and specifications of Hispano and EAC.111 front brakes.1st Feb 1924Box 22 \ 1  Scan096
The condition of steel brake drum liners and a proposal to test a Hispano brake.1st Feb 1924Box 22 \ 1  Scan097
Drawing of a 15 HP front brake drum made from aluminium with a steel liner.1st Feb 1924Box 22 \ 1  Scan098
Cross-section engineering drawing of a carrier with dimensions and weight.1st Feb 1924Box 22 \ 1  Scan099
Drawing of a Hispano front shoe with dimensions and a cross-section view.1st Feb 1924Box 22 \ 1  Scan100
Drawing of a Hispano Brake Carrier made from aluminium.11th Feb 1924Box 22 \ 1  Scan101
Design and fitting of a servo system for brakes, including servo drive and pull.11th Feb 1924Box 22 \ 1  Scan102
Technical memorandum discussing improvements to brake design, including a comparison with Hispano brakes.11th Feb 1924Box 22 \ 1  Scan103
Page 3 of a typed letter discussing holding a car on a 1 in 5 gradient and 4-wheel brakes.11th Feb 1924Box 22 \ 1  Scan104
Competitor's (Hispano) remarkable acceleration and questioning whether to emulate it.11th Feb 1924Box 22 \ 1  Scan105
Field report letter detailing a road test, including notes on brake performance and travel itinerary.6th Feb 1924Box 22 \ 1  Scan106
Modifications to a low-speed brake servo and resulting pedal pressure.11th Feb 1924Box 22 \ 1  Scan107
Requesting to borrow a Hispano-Suiza 'Type Boulogne' car for performance testing at Brooklands.2nd Feb 1924Box 22 \ 1  Scan108
Weight breakdown for Hispano Suiza components including the unit, radiator, side levers and pedals.12th Feb 1924Box 22 \ 1  Scan109
Chassis modifications for a trip to the South of France and competing with a Hispano car.13th Feb 1924Box 22 \ 1  Scan110
Confirming a Hispano Suiza car has been sold and is unavailable.14th Feb 1924Box 22 \ 1  Scan111
Hispano engine, detailing its removal, weight, and comparison with an EAC engine.14th Feb 1924Box 22 \ 1  Scan112
Comparative table of road wheel Horse Power for Hispano and EAC engines at various RPMs.1st Feb 1924Box 22 \ 1  Scan113
Secret internal memo about reducing the weight of four-wheel brakes using aluminium or duralumin.1st Feb 1924Box 22 \ 1  Scan114
Power curve test data for a Hispano Suiza engine.19th Feb 1924Box 22 \ 1  Scan115
Short internal memo from 'R.' to 'H.S.' concerning an arrangement related to 'HISPANO X.4214'.19th Feb 1924Box 22 \ 1  Scan116
EAC engine test, detailing horsepower results at various RPMs.20th Feb 1924Box 22 \ 1  Scan117
Secret internal memorandum discussing three design issues: patents, steering shocks, and a heated dynamo.23th Feb 1924Box 22 \ 1  Scan118


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