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
Weight specifications for the Goshawk model, including body weight, passenger load, and the required adjustment of springs.18th Sep 1922Box 107 \ 4  scan0007
Urgent internal memo requesting specific weight details for the Goshawk chassis.21th Sep 1922Box 107 \ 4  scan0008
Weight of the Goshawk chassis and its various components.1st Sep 1922Box 107 \ 4  scan0009
Maximum car weights and spring specifications for the Goshawk model.5th Oct 1922Box 107 \ 4  scan0010
Vital importance of weight saving in chassis and body design.5th Oct 1922Box 107 \ 4  scan0011
Weight distribution list for chassis spare parts, detailing front, rear, and total weights in pounds (LBS).14th Jun 1922Box 107 \ 4  scan0012
Specification sheet detailing the weight distribution for various car bodies and passenger configurations.14th Jun 1922Box 107 \ 4  scan0013
Breakdown of maximum and minimum car weights, detailing front, rear, and total pounds for various components.14th Jun 1922Box 107 \ 4  scan0014
Calculation sheet for car spring loads, detailing maximum, minimum, and proposed ranges.16th Nov 1922Box 107 \ 4  scan0015
Weight limitations for the Goshawk model and the terms of the associated guarantee.16th Nov 1922Box 107 \ 4  scan0016
Continuation page concerning front axle weight limits and referencing an attached document on Goshawk weights.1st Oct 1922Box 107 \ 4  scan0017
Correcting previously supplied Goshawk chassis weights and discussing guaranteed weight.20th Nov 1922Box 107 \ 4  scan0018
Comparison of the Goshawk and 40/50 models focusing on displacement per ton per mile.19th Jul 1917Box 107 \ 4  scan0019
From B.J. to Hs. requesting confirmation and clarification on Goshawk chassis and component weights.23th Nov 1922Box 107 \ 4  scan0020
Weight limit of the Goshawk car, proposing a reduction from a 39 cwt limit to 30 cwt.23th Nov 1922Box 107 \ 4  scan0021
Request for the weight of tools and spares supplied with the Goshawk chassis to revise statistics.23th Nov 1922Box 107 \ 4  scan0022
Breakdown of weights for the 7-Goshawk-11 car and discussion on rear axle and spring loads.24th Nov 1922Box 107 \ 4  scan0023
Weight calculations and passenger capacity for the Goshawk model.28th Nov 1922Box 107 \ 4  scan0024
Clarifying the complete weight of the Goshawk chassis, questioning whether to include the spare wheel and tyre.6th Dec 1922Box 107 \ 4  scan0025
Particulars for the Goshawk chassis, including weight, engine specifications, and consumption data.12th Dec 1922Box 107 \ 4  scan0026
Weights and radii of gyration for the 40/50 and Goshawk clutch and flywheel assemblies.27th Feb 1923Box 107 \ 4  scan0027
Production faults related to the 20 HP chassis weight and setting a minimum oil consumption standard.16th Mar 1923Box 107 \ 4  scan0028
Weight of the 20-HP chassis and establishing an average weight.28th Mar 1923Box 107 \ 4  scan0029
List of weights for Goshawk engine piston and connecting rod components.13th Apr 1923Box 107 \ 4  scan0030
The weight measurements for the 7-Goshawk-11 vehicle.30th Apr 1923Box 107 \ 4  scan0031
Fitting experimental parts to Goshawk models and discussing the overweight body of a Maythorn Saloon.15th May 1923Box 107 \ 4  scan0032
Specification sheet detailing the weights of the 20 HP Goshawk-11 chassis in various configurations.5th Jun 1923Box 107 \ 4  scan0033
Comparison report on the stability and top-heaviness of a Maythorn Saloon versus a standard Hooper Limousine on a 20 HP chassis.13th Jun 1923Box 107 \ 4  scan0034
The methodology of tests to determine the centre of gravity of various car types.31th May 1923Box 107 \ 4  scan0035
Experiments on vehicle suspension and weight distribution for Goshawk-11 models.31th May 1923Box 107 \ 4  scan0036
Table detailing the Centre of Gravity and total weight for various Goshawk car models.5th Jun 1923Box 107 \ 4  scan0037
Estimating the weight of the roofs for 7-Goshawk-11 and 3-Goshawk-11 car models.5th Jun 1923Box 107 \ 4  scan0038
Comparison of specifications for Saloon and Limousine Goshawk-11 model car roofs.12th Jun 1923Box 107 \ 4  scan0039
Breakdown of weight differences between the 3-Goshawk-11 and 7-Goshawk-11 models.12th Jun 1923Box 107 \ 4  scan0040
Calculation of theoretical rollover speeds for a touring car and a bodied car on a 100 ft. radius corner.7th Jun 1923Box 107 \ 4  scan0041
Weight of the 20 HP chassis and its increase over the originally agreed weight.7th Jun 1923Box 107 \ 4  scan0042
Weight of the 20-HP chassis and the basis for its guarantee.2nd Jun 1923Box 107 \ 4  scan0043
The weight of a luggage grid for the Goshawk.15th Jun 1923Box 107 \ 4  scan0044
Goshawk 11 wheels including weight, tyre specifications, pressure, and revolutions per mile.28th Jun 1923Box 107 \ 4  scan0045
Capacities and weights for the Goshawk 11 radiator components.4th Jul 1923Box 107 \ 4  scan0046
Information and test results for a vehicle's radiator and cooling system components.22th Sep 1923Box 107 \ 4  scan0047
Torque reaction vibrations, including a diagram of the engine test setup.22th Sep 1923Box 107 \ 4  scan0048
Measuring engine torque and the development of a spring-controlled arm for accurate readings.22th Sep 1923Box 107 \ 4  scan0049
Blueprint detailing the total weight and included components of the 8.G.I. engine unit.24th Sep 1923Box 107 \ 4  scan0050
Negative implications of increasing car body weight on the 20 HP model.1st Jan 1924Box 107 \ 4  scan0051
Effects of additional weight on the 20 HP Goshawk Chassis and proposing a 10,000-mile test.1st Jan 1924Box 107 \ 4  scan0052
Weight specification for the Goshawk unit.12th Feb 1924Box 107 \ 4  scan0053
Weights of the 20 HP Goshawk engine unit.18th Feb 1924Box 107 \ 4  scan0054
Table listing the weights of various engine components and their weight relative to displacement.18th Feb 1924Box 107 \ 4  scan0055
Continued weight schedule for engine components, with part numbers, weights in lbs, and weight per displacement.18th Feb 1924Box 107 \ 4  scan0056
Comparative table of weights for portions of different engine models per 100 cubic inches of displacement.18th Feb 1924Box 107 \ 4  scan0057
Stating the weight of a G.111 Gearbox with right hand levers.3rd Apr 1924Box 107 \ 4  scan0058
Comparison of specifications for the Standard and Thermostat type 20 HP radiator.3rd Apr 1924Box 107 \ 4  scan0059
Weight comparison between a 20 HP car with chassis GF.68 and an Experimental Limousine 3-G-11.7th Nov 1924Box 107 \ 4  scan0060
From the Test Department detailing the average weights of the 40/50 'U' series and 20 HP chassis.24th Feb 1925Box 107 \ 4  scan0061
Weight details for model 9 G III, including total road weight and axle weights.1st Jun 1925Box 107 \ 4  scan0062
The completion and delivery schedule of a Phantom chassis.2nd Jun 1925Box 107 \ 4  scan0063
Secret internal memo detailing the weights and specifications of the front axle and springs for car 9-G-111.2nd Jun 1925Box 107 \ 4  scan0064
Requesting the weight of the old India Front Axle forging for comparison with a new 32 lbs forging.1st Oct 1925Box 107 \ 4  scan0065
The weights of the 20 HP front axle with and without front wheel brakes.13th Nov 1925Box 107 \ 4  scan0066
Parts list detailing the component weights for the Goshawk II and Goshawk III front axles.18th Feb 1925Box 107 \ 4  scan0067
Performance and weight test results for a 20 HP, Chassis 1150, conducted on Ticknall Hill.18th Feb 1925Box 107 \ 4  scan0068
Table detailing the front, rear, and total weights of various car models and body types.26th Jan 1926Box 107 \ 4  scan0069
And calculating the weight differences between components of the G.111 and G.11 chassis.1st Feb 1926Box 107 \ 4  scan0070
Attached blueprints giving weights for Goshawk II and III components, including the gearbox, flywheel, clutch, and servo.24th Feb 1926Box 107 \ 4  scan0071
Post Office telegram urgently requesting weights for a specific reference.24th Oct 1926Box 107 \ 4  scan0072
Requesting approximate body weights for a 20 HP Sales Trials car for the calculation of springs.22th Mar 1926Box 107 \ 4  scan0073
Weight calculation sheet for a 20 HP, 10,000-mile trials car for sales.22th Mar 1926Box 107 \ 4  scan0074
Estimated specification of weights for a 10,000 miles trials car for 'Sales' (20 HP).23th Mar 1926Box 107 \ 4  scan0075
Body weight limitations, back axle ratios, and proposed engine modifications for the 20 HP model.12th Mar 1926Box 107 \ 4  scan0076
Continued note on modifications to a 20 HP chassis, specifically the louvres and front axle control.1st Feb 1927Box 107 \ 4  scan0077
Importance of weight reduction on the 40/50 & 20 HP models for performance and legal compliance.1st Feb 1927Box 107 \ 4  scan0078
Continued discussion on fabric-covered car bodies, their finish, weight, and cost considerations.17th Feb 1927Box 107 \ 4  scan0079
List of 20-HP chassis weights between 1922 and 1927, noting the increases and the reasons for them.17th Feb 1927Box 107 \ 4  scan0080
Request for a comparative weights table for axle parts of the EAC.7 and 40/50 HP models.25th Oct 1927Box 107 \ 4  scan0081
Weight reduction on a 20 HP chassis by modifying the flywheel, clutch, and engine head.28th Nov 1927Box 107 \ 4  scan0082
Calculations to find the radius of gyration squared for an 11-G-111 landaulet body by swinging.28th Nov 1927Box 107 \ 4  scan0083
Diagram and calculations for determining the center of gravity of a vehicle's sprung and unsprung mass.28th Nov 1927Box 107 \ 4  scan0084
Page of calculations involving variables k²F, ab, and their ratio, with results in square feet.5th Apr 1928Box 107 \ 4  scan0085
The weight difference between a standard and a lightened Goshawk flywheel.5th Apr 1928Box 107 \ 4  scan0086
List of approximate weights for the 20 HP chassis with medium pressure tyres and wellbase wheels.16th Jan 1928Box 107 \ 4  scan0087
Calculation of the radius of gyration (K²) for car model 11-G-111 (landaulet body) by swinging.16th Jan 1928Box 107 \ 4  scan0088
Page of calculations and a diagram concerning vehicle center of gravity and mass distribution.16th Jan 1928Box 107 \ 4  scan0089
Page of engineering calculations, continued from a previous page.22th Aug 1928Box 107 \ 4  scan0090
Surprising weight of a Barker Coupe Limousine and proposing a weight analysis of a modified chassis.22th Aug 1928Box 107 \ 4  scan0091
Comparing car performance based on weight and engine capacity for the 'SS', 20 HP, Phantom, and Chrysler models.13th Apr 1929Box 107 \ 4  scan0092
Data table comparing specifications of various car models including Phantom, S.S., 20 HP, and Chrysler.15th Apr 1929Box 107 \ 4  scan0093
Proposed performance improvements for the 20 HP car engine.15th Apr 1929Box 107 \ 4  scan0094
Performance calculation sheet comparing engine capacity, weight, and axle ratio for a 20 HP model.16th Aug 1929Box 107 \ 4  scan0095
List of average finished car weights for 'Standard Bodies' and 'De Luxe Bodies' with handwritten annotations.16th Aug 1929Box 107 \ 4  scan0096
The weight of a 'China' engine and gearbox unit for a 20 HP lote.10th Jan 1930Box 107 \ 4  scan0097
Analysing the 25 HP chassis weight in comparison to a Chrysler car, concluding not to add further weight.14th Jan 1931Box 107 \ 4  scan0098
Car weights, comparing customer cars to the 26-EX experimental model and the impact of accessories.2nd Feb 1931Box 107 \ 4  scan0099
Discrepancies in the weights of various car bodies and complete cars.2nd Jun 1931Box 107 \ 4  scan0100
Comparing the weights of various 6-seater Pullman limousine bodies and discussing weight reduction challenges.17th Feb 1931Box 107 \ 4  scan0101
Unreliability of experimental car weight data and the impact of coachbuilder fittings and materials on total vehicle weight.17th Feb 1931Box 107 \ 4  scan0102
Messrs Barker's accessories and the need to gather comparative weight data for various cars.17th Feb 1931Box 107 \ 4  scan0103
Table of front and rear chassis weights for the Phantom II and 20/25 models.17th Feb 1931Box 107 \ 4  scan0104
Table detailing car weights over front and rear axles, and shock damper loadings for various models.1st Mar 1931Box 107 \ 4  scan0105
Confidential internal memorandum concerning car body weights and coachbuilder practices.1st Mar 1931Box 107 \ 4  scan0106


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