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
Internal order request for a pair of 25 HP rear road springs with a modified camber.15th Feb 1935Box 106 \ 1  scan0348
Implementation of flexible springs on the 20/25's models.28th Jun 1935Box 106 \ 1  scan0349
Instructions to send experimental 20/25 HP chassis road springs to Paris for testing on a demonstration car.25th Jul 1935Box 106 \ 1  scan0350
Experiments to improve the springing and comfort of chassis GAF-23 for Lady Guthrie.10th Sep 1935Box 106 \ 1  scan0351
The testing and standardisation of road springs for the 20/25 HP chassis.10th Sep 1935Box 106 \ 1  scan0352
Standardisation of springs for the 20/25 chassis for Continental use.5th Sep 1935Box 106 \ 1  scan0353
The performance of new intermediate springs fitted to a demonstration car, model GSF.5.2nd Sep 1935Box 106 \ 1  scan0354
Complaints of uncomfortable riding and springing in the rear seats of the 20/25 HP model.11th Sep 1935Box 106 \ 1  scan0355
Customer complaints about ride comfort, pitching, and damper performance on 20/25 Hp models.11th Sep 1935Box 106 \ 1  scan0356
Request to produce and fit a .750 inch diameter rear roll rod to a 25 HP chassis, model 18-G-IV.12th Sep 1935Box 106 \ 1  scan0357
Customer complaint about uncomfortable riding in the rear of chassis GPG-15.12th Sep 1935Box 106 \ 1  scan0358
Letter to Thomas Firth & John Brown Ltd. regarding the examination and urgent order of springs.11th Sep 1935Box 106 \ 1  scan0359
Letter confirming the commencement of manufacturing two pairs of springs to drawings F.61003 and F.61009.13th Sep 1935Box 106 \ 1  scan0360
Letter from Thos Firth & John Brown Ltd. regarding details of plate thicknesses.14th Sep 1935Box 106 \ 1  scan0361
Specifications for front and rear springs, drawings F.61003 and F.61009.14th Sep 1935Box 106 \ 1  scan0362
Rear seat discomfort due to weight distribution, with a comparative analysis of axle weights on various similar limousine models.14th Sep 1935Box 106 \ 1  scan0363
Springing complaint related to weight distribution for chassis GAF-23, owned by Lady Guthrie.16th Sep 1935Box 106 \ 1  scan0364
Suspension complaints and a proposed modification to shock absorber valves.16th Sep 1935Box 106 \ 1  scan0365
Agreeing on the need for improvement to the springing on big Limousine bodies.17th Sep 1935Box 106 \ 1  scan0366
Analysis of springing on a 20/25 HP model, discussing weight distribution and ride quality.17th Sep 1935Box 106 \ 1  scan0367
Comparison of springing arrangements and ride comfort for different car bodies.17th Sep 1935Box 106 \ 1  scan0368
Postscript to a memo regarding 25HP springing, valuing the Repair Department's practical experience over technical arguments.17th Sep 1935Box 106 \ 1  scan0369
Car springing performance under varying load conditions.18th Sep 1935Box 106 \ 1  scan0370
Complexities of vehicle suspension springing in relation to variable loads.19th Sep 1935Box 106 \ 1  scan0371
Effect on a car's ride quality by adding weight to the luggage grid.19th Sep 1935Box 106 \ 1  scan0372
Spring clips and centre bolts for a 20/25 HP chassis, noting a discrepancy in part length.24th Sep 1935Box 106 \ 1  scan0373
Standardisation sheet for intermediate type road springs for continental use.14th Oct 1935Box 106 \ 1  scan0374
Cost estimation stating there is no charge for extra jigs, tools, and equipment for a special order.25th Sep 1935Box 106 \ 1  scan0375
Letter to a supplier regarding preliminary tests and a request for stress figures and drawings for 25 HP springs.1st Nov 1935Box 106 \ 1  scan0376
Letter concerning the stress range analysis of experimental road springs.4th Nov 1935Box 106 \ 1  scan0377
Continuation sheet of a letter from Thos. Firth & John Brown Ltd. regarding spring stresses.5th Nov 1935Box 106 \ 1  scan0378
Letter to a supplier regarding stress specifications for springs and requesting a drawing.5th Nov 1935Box 106 \ 1  scan0379
Response discussing the specifications and practicality of flexible road springs for a 20/25 HP vehicle.7th Nov 1935Box 106 \ 1  scan0380
Letter concerning stress calculations for a mainplate and flexible springs for a 20/25 HP car.7th Nov 1935Box 106 \ 1  scan0381
Oversteering issues on the 25 HP car, proposing to test a front anti-roll rod.7th Nov 1935Box 106 \ 1  scan0382
Letter concerning the supply of more flexible road springs for a 25 HP Chassis, enclosing print No. 172.11th Nov 1935Box 106 \ 1  scan0383
Letter to a supplier regarding the design of springs, suggesting a minor alteration to the bottom plates.12th Nov 1935Box 106 \ 1  scan0384
Test results for the deflection of front springs of a 20/25 model under braking torque.16th Dec 1935Box 106 \ 1  scan0385
Cost reduction proposal comparing the 20/25 HP Front Spring Rear Anchorage Brackets with a Bentley type alternative.19th Dec 1935Box 106 \ 1  scan0386
Requesting the production of two additional sets of front roll rod parts.21th Jan 1936Box 106 \ 1  scan0387
Cost reduction analysis for the 25-30 HP front spring rear anchorage brackets, comparing sheet metal parts to forgings.29th Jan 1936Box 106 \ 1  scan0388
Completion and fitting of two sets of 25 HP Front Roll Rods.4th Feb 1936Box 106 \ 1  scan0389
Blueprints for grooving the front spring plates on a 20/25 HP chassis.17th Feb 1936Box 106 \ 1  scan0390
Request to issue a covering order to Messrs. Firth for 2 car sets of 25 HP road springs.18th Feb 1936Box 106 \ 1  scan0391
Letter to Messrs. Thos. Firth & John Brown Ltd. ordering two more car sets of 25 HP road springs.18th Feb 1936Box 106 \ 1  scan0392
Letter from supplier Thos Firth & John Brown Ltd discussing the placement of clips on front and rear springs.21th Feb 1936Box 106 \ 1  scan0393
Letter to a spring supplier confirming changes to an order for 25 HP front springs.25th Feb 1936Box 106 \ 1  scan0394
Letter to supplier Messrs. Thos. Firth & John Brown Ltd. ordering a pair of front 25 HP special low rating springs.21th Apr 1936Box 106 \ 1  scan0395
Official order for a set of 25 HP front springs from Thos. Firth & John Brown Ltd.21th Apr 1936Box 106 \ 1  scan0396
Letter from a supplier acknowledging a request to produce a pair of special low rating springs.23th Apr 1936Box 106 \ 1  scan0397
Proposal for a front anti-roll rod for the 25/30 HP model.28th Apr 1936Box 106 \ 1  scan0398
Instructions for fitting a bracket to the lower flange of the frame.28th Apr 1936Box 106 \ 1  scan0399
Request for a covering order to be sent to Thos. Firth & John Brown Ltd. for fitting new plates to a pair of 25 HP road springs.7th May 1936Box 106 \ 1  scan0400
Sending one broken road spring to Firth's of Sheffield.7th May 1936Box 106 \ 1  scan0401
Letter to Thos. Firth & John Brown Ltd. confirming requirements for 25 HP and Bentley front springs.7th May 1936Box 106 \ 1  scan0402
Complaint of uncomfortable riding, with a query about the maximum permitted body overhang for chassis GU-34.25th Nov 1936Box 106 \ 1  scan0403
Blueprint of an enclosed limousine body showing side elevation, plan view, and key dimensions.18th Jun 1936Box 106 \ 1  scan0404
Evaluating the car's springing and ride quality, with proposals for improvement.21th Dec 1936Box 106 \ 1  scan0405
Series of springing and suspension road tests conducted at Cricklewood.21th Dec 1936Box 106 \ 1  scan0406
Road test report on vehicle suspension performance, detailing adjustments to dampers, roll bars, and tyre pressures.21th Dec 1936Box 106 \ 1  scan0407
Use of standard rear road springs with low-rated front springs to improve ride quality.24th Dec 1936Box 106 \ 1  scan0408
Comparison table of spring rate and buffer clearance data for Phantom III, 30 HP, and Bentley models.30th Dec 1936Box 106 \ 1  scan0409
Requesting the scrapping of 114 obsolete 25/30 normal type front springs from stores.30th Dec 1936Box 106 \ 1  scan0410
Failed experiment with rubber body mounting on a trials car and an inquiry into using rubber to reduce tyre noise on a 25/30 chassis.20th Apr 1937Box 106 \ 1  scan0411
Modifications required for fitting rubber between the axle and springs on a 30 HP model.29th Apr 1937Box 106 \ 1  scan0412
Design changes for a petrol tank, including the deletion of the ingoing filter and modifications to the sump and outgoing filter.11th Jun 1925Box 106 \ 2  scan0001
Petrol filtering precautions and refuelling methods for cars in France.10th Sep 1925Box 106 \ 2  scan0002
Abandoning the separate compartment petrol tank design in favour of a two-length suction pipe system.29th Sep 1925Box 106 \ 2  scan0003
Query regarding preparations to include new fittings, tested on the New Phantom, on the 20 HP petrol tank.18th Mar 1926Box 106 \ 2  scan0004
Issues with 20 HP petrol filters and proposing new filter system designs.3rd Jun 1926Box 106 \ 2  scan0005
Preparation of a 20 HP chassis for a 10,000-mile test and requesting a new petrol tank filler design.16th Jun 1926Box 106 \ 2  scan0006
Petrol tank filler for the 20 HP car, comparing it to the Phantom's.16th Jun 1926Box 106 \ 2  scan0007
Blueprint detailing the calibration measurements for a Goshawk petrol tank.25th Apr 1927Box 106 \ 2  scan0008
Internal memorandum discussing the selection of suitable wheels and tyres for the 20 HP model.25th Apr 1927Box 106 \ 2  scan0009
Query regarding an alteration to the rear tank for improved road clearance.5th May 1927Box 106 \ 2  scan0010
Insufficient road clearance on the 20 HP and 7-EX models experienced in France.5th May 1927Box 106 \ 2  scan0011
Implementation of an improved petrol tank and vertical shutters for the 20 HP chassis 'L' Series.17th Jun 1927Box 106 \ 2  scan0012
Standardisation of a new 20 HP petrol tank with reserve and filler.20th Jun 1927Box 106 \ 2  scan0013
Standardisation of a new petrol tank with a reserve and filler.23th May 1927Box 106 \ 2  scan0014
Cost summary report for testing the 'L' series chassis.8th Oct 1927Box 106 \ 2  scan0015
Leaflet for insertion into the 20 HP Chassis Instruction Book.28th Oct 1927Box 106 \ 2  scan0016
Instructions for the dashboard petrol filter and the petrol tank with reserve supply.1st Apr 1927Box 106 \ 2  scan0017
Instructions for cleaning and maintaining the petrol tank filters with a reserve supply, and a description of the dashboard petrol filter.26th Mar 1928Box 106 \ 2  scan0018
Urgency and specific improvements for the 'India 3' chassis over the 'EAC.10'.26th Mar 1928Box 106 \ 2  scan0019
Chassis development, parts procurement, and proposed modifications for testing.17th May 1928Box 106 \ 2  scan0020
Continued memorandum discussing the need for continuous improvement and the long lead times for implementation.22th May 1928Box 106 \ 2  scan0021
Modifications to the rear end of 'India 3 & 4' models, covering the petrol tank, wheel carrier, luggage grid, tail lamp, and exhaust.22th May 1928Box 106 \ 2  scan0022
Position of a 2-level device and recommending a shallower sump for the 20 HP model petrol tank.23th May 1928Box 106 \ 2  scan0023
Revised drawing for the 20-HP petrol tank to facilitate filter removal and confirming the design with coachbuilder Hoopers.6th Jun 1928Box 106 \ 2  scan0024
Proposed modification to a petrol filler cap for the 20-HP model.17th Jul 1928Box 106 \ 2  scan0025
Requesting an India-4 petrol tank for Claudel Hobsons to calibrate the petrol gauge.26th Oct 1928Box 106 \ 2  scan0026
Query regarding a modification to the 20 HP model's petrol tank cap and its locking device, contrasting it with the 'Phantom' model.1st Nov 1928Box 106 \ 2  scan0027
The design and function of the 20 HP petrol filler cap.28th Nov 1928Box 106 \ 2  scan0028
Letter to H.M. Hobson Ltd. regarding the fitting, calibration, and testing of two petrol tanks.13th Nov 1928Box 106 \ 2  scan0029
Letter to H.M. Hobson Ltd. sending a report on a 20 HP gauge and asking for assistance to improve its pumping.30th Nov 1928Box 106 \ 2  scan0030
Test report on the calibration and road performance of a Hobson K-S telegage (fuel gauge) fitted to a 20 HP chassis.30th Nov 1928Box 106 \ 2  scan0031
Second test on a petrol gauge, recording fuel level changes over distance.12th Dec 1929Box 106 \ 2  scan0032
Requesting an urgent order for a K-S Petrol Gauge with specific black figures on a cream background.12th Dec 1929Box 106 \ 2  scan0033
Request to provide a drawing of an India 1V Petrol Tank to Messrs. Hobson due to incorrectly placed air line connections.3rd Dec 1928Box 106 \ 2  scan0034
Removal of a petrol tank and the status of runningboard tool boxes.20th Dec 1928Box 106 \ 2  scan0035


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