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
Investigation into the oil levels of the left-hand S.S. front dampers.25th Feb 1931Box 16 \ 4  Scan258
Policy and design options for new shock dampers, referencing several design schemes.2nd Mar 1931Box 16 \ 4  Scan259
The lubrication of shock damper connecting links on Phantom II & 25 HP models to address oil loss.2nd Mar 1931Box 16 \ 4  Scan260
Proposing a permanent application of a successful lubrication test for front shock dampers.3rd Mar 1931Box 16 \ 4  Scan261
Recommendation to raise the oil level in Phantom II front shock absorbers after deleting the Bijur supply.4th Mar 1931Box 16 \ 4  Scan262
The design, testing, and production strategy for the Phantom II shock damper.4th Mar 1931Box 16 \ 4  Scan263
From DA to HS discussing the proposed programme and design for P.2 shock dampers.6th Mar 1931Box 16 \ 4  Scan264
New, lighter alternative method for making a spring-loaded piston for shock dampers.7th Mar 1931Box 16 \ 4  Scan265
Changing a piston's material from Phosphor Bronze to cast iron for economy.9th Mar 1931Box 16 \ 4  Scan266
New intermediate piston and lever for endurance testing on a 25 HP car.9th Mar 1931Box 16 \ 4  Scan267
Programme for fitting P.2 shock dampers and related design preferences.6th Mar 1931Box 16 \ 4  Scan268
Shock dampers, agreeing to trial a piston made from cast iron.11th Mar 1931Box 16 \ 4  Scan269
Modification for lubricating the pin on a front hydraulic shock absorber.17th Mar 1931Box 16 \ 4  Scan270
Blueprint of an S.S. A.C.D. intermediate lever with an oil feed from an air vent.16th Mar 1931Box 16 \ 4  Scan271
Heavily faded document with a 'Print Room' stamp from Derby.17th Mar 1931Box 16 \ 4  Scan272
The development and production of improved shock absorbers, including a Delco split piston and new connecting link.23th Mar 1931Box 16 \ 4  Scan273
Internal memorandum requesting the manufacture of half a dozen sets of cast iron ends for shock absorbers.24th Mar 1931Box 16 \ 4  Scan274
Request for a preliminary arrangement drawing for Phantom II Rear Dampers with handwritten notes on adapting them for a 20 HP model.25th Mar 1931Box 16 \ 4  Scan275
Urgent requirement for Phantom II rear and front hydraulic shock absorbers, referencing drawing F.83611.9th Apr 1931Box 16 \ 4  Scan276
Summary of modifications required for the rear hydraulic shock dampers on a Phantom II chassis.11th Apr 1931Box 16 \ 4  Scan277
Parts list and memorandum detailing modifications for cylinders, oil pipes, and rear shock dampers.11th Apr 1931Box 16 \ 4  Scan278
Experimental design and production status of shock dampers for the Phantom II and 20/25 HP chassis.13th Apr 1931Box 16 \ 4  Scan279
Design, testing, and production of hydraulic shock absorbers for Phantom II and 20 HP models.14th Apr 1931Box 16 \ 4  Scan280
Design improvements and cost-saving measures for a horizontal damper.17th Apr 1931Box 16 \ 4  Scan281
Modifications required on rear shock dampers for the Phantom II chassis, listing replacement parts and usage instructions.20th Apr 1931Box 16 \ 4  Scan282
Test report on the Phantom II rear axle rebound movement using different damper setups.20th Apr 1931Box 16 \ 4  Scan283
Graph showing the effect of adjustable leak on rear axle movement for Delco Lovejoy shock dampers on a 25 EX car.20th Apr 1931Box 16 \ 4  Scan284
Blank page with a purple date and location stamp from the Stress Office.20th Apr 1931Box 16 \ 4  Scan285
Graph showing the effect of drilled valves on maximum rear axle movement at the Burton Road level crossing.20th Apr 1931Box 16 \ 4  Scan286
Graph showing the effect of adjustable leak on Delco Lovejoy shock dampers on rear axle movement at a level crossing.20th Apr 1931Box 16 \ 4  Scan287
Heavily faded and mostly illegible document, with only a purple date stamp being readable.20th Apr 1931Box 16 \ 4  Scan288
Standardisation sheet for oiling the link joint on Phantom II front shock dampers and the associated costs.23th Apr 1931Box 16 \ 4  Scan289
Seeking confirmation on the use of a split piston type of shock damper for the N.2 series chassis.1st May 1931Box 16 \ 4  Scan290
Principles and production costs of a hydraulic damper design, compared to Delco dampers.4th May 1931Box 16 \ 4  Scan291
Testing and ordering of materials for 40/50 HP hydraulic shock absorbers.6th May 1931Box 16 \ 4  Scan292
Decision on shock dampers for the N.2 series R.H. chassis, specifying the material for future operating levers.6th May 1931Box 16 \ 4  Scan293
Standardisation of an oiling scheme for the link joint on front shock dampers for the Phantom II.17th Apr 1931Box 16 \ 4  Scan294
Test report on 40/50 Bump Dampers, detailing wear and performance after 30 and 38 hours.7th May 1931Box 16 \ 4  Scan295
The endurance and noise testing of a pair of rear hydraulic shock absorbers.8th May 1931Box 16 \ 4  Scan296
Instruction memo detailing part replacements for a spring-loaded piston for the rear shock damper on the Phantom II & 20/25 HP chassis.12th May 1931Box 16 \ 4  Scan297
Updates to the rear hydraulic shock damper for the Phantom II 10,000 miles trials car.22th May 1931Box 16 \ 4  Scan298
Parts changes for the Phantom II chassis rear hydraulic shock damper.29th May 1931Box 16 \ 4  Scan299
Summary of modifications for rear hydraulic shock dampers on a Phantom II chassis.3rd Jun 1931Box 16 \ 4  Scan300
Development, interchangeability, and testing of hydraulic shock absorbers for various car models.16th Jun 1931Box 16 \ 4  Scan301
Dispatch and endurance testing of improved 40/50 rear shock absorbers with nitroalloy wearing pads.23th Jun 1931Box 16 \ 4  Scan302
Fitting and modification of hydraulic shock dampers controlled from the driver's seat.24th Jun 1931Box 16 \ 4  Scan303
Request to demonstrate dampers adjustable from the driving seat on a 22-EX car.30th Jun 1931Box 16 \ 4  Scan304
Modifications and tests performed on a No 2 Double Piston Damper to resolve a noise issue.7th Jul 1931Box 16 \ 5  Scan001
Technical report on experiments to eliminate noise from a damper by modifying valve leaks, hole diameters, and springs.7th Jul 1931Box 16 \ 5  Scan002
Potential modifications to valves and dampers, including clearances and drilling.8th Jul 1944Box 16 \ 5  Scan003
Blueprint of a Masked Valve for a Nº2 Double Piston Damper.8th Jul 1944Box 16 \ 5  Scan004
Stamped document indicating when a component was fitted.8th Dec 1931Box 16 \ 5  Scan005
Oil leaks from hydraulic shock absorbers.13th Jul 1931Box 16 \ 5  Scan006
Shock damper complaints, comparisons with competitors, and proposals for investigation and development.7th Jul 1931Box 16 \ 5  Scan007
Fault found during a 10,000-mile test of rear shock absorbers, specifically a hammered ball valve seat.24th Jul 1931Box 16 \ 5  Scan008
Clarifying issues with standard versus modified shock absorbers for a 10,000-mile test car.30th Jul 1931Box 16 \ 5  Scan009
Trouble with 25-EX shock absorbers during a 10,000-mile test, specifically regarding high loads in France.4th Aug 1931Box 16 \ 5  Scan010
Notice detailing a noise issue with hydraulic shock absorbers caused by the replenishing ball valves.11th Aug 1931Box 16 \ 5  Scan011
Seeking clarification on the type of shock-absorbers being tested on vehicle 25-EX.11th Aug 1931Box 16 \ 5  Scan012
The performance of low rating springs and shock absorbers on a 40/50 model used in France.31th Aug 1931Box 16 \ 5  Scan013
Vehicle suspension performance, specifically concerning shock absorbers and springs during road tests.2nd Sep 1931Box 16 \ 5  Scan014
Clarifying the specifications for holes in shock damper high-pressure valves across different chassis models.2nd Sep 1931Box 16 \ 5  Scan015
Adjustable dampers and shock absorber schemes to improve vehicle springing.2nd Sep 1931Box 16 \ 5  Scan016
Vehicle suspension, comparing Hartford's and Delco dampers and considering future adjustable damping systems.2nd Sep 1931Box 16 \ 5  Scan017
Performance graphs for a Delco II adjustable leak rear damper with a 12' lever.2nd Sep 1931Box 16 \ 5  Scan018
Mostly blank page with a purple ink 'Print Room' date stamp.2nd Sep 1931Box 16 \ 5  Scan019
Indicator diagrams for high and low-pressure double piston dampers.10th Jun 1931Box 16 \ 5  Scan020
Extremely faded and illegible typed document with a purple date stamp in the bottom right corner.2nd Sep 1931Box 16 \ 5  Scan021
40/50 HP springing, adjustability, and fitting front hydraulic shock absorbers to car 58-GN.8th Sep 1931Box 16 \ 5  Scan022
The shock absorber loads for the 25-EX model now running in France.9th Sep 1931Box 16 \ 5  Scan023
Alterations to the 40/50 springing, comparing Hartford shock dampers with Delco adjustable hydraulics.9th Sep 1931Box 16 \ 5  Scan024
Blueprints and replacement parts for Phantom II chassis rear shock damper connecting tubes.18th Sep 1931Box 16 \ 5  Scan025
Need for controllable shock absorbers, citing performance issues and retailer feedback.24th Sep 1931Box 16 \ 5  Scan026
Necessity of replenishing pipes for hydraulic dampers, concluding they are an unnecessary complication.9th Oct 1931Box 16 \ 5  Scan027
Fitting drilled valves in rear shock absorbers and testing new experimental adjustable ones.2nd Oct 1931Box 16 \ 5  Scan028
Standardization of shock absorber settings for production based on different spring types.4th Nov 1931Box 16 \ 5  Scan029
Recommended shock damper load settings for various car models based on customer feedback.5th Nov 1931Box 16 \ 5  Scan030
Suspension settings, including valve holes and spring loads for Phantom II models.11th Sep 1931Box 16 \ 5  Scan031
Query about applying altered damper loads from an experimental Phantom II (25-EX) to production vehicles.11th Sep 1931Box 16 \ 5  Scan032
Two modifications to hydraulic shock absorbers to reduce knocking.1st Nov 1931Box 16 \ 5  Scan033
Drilling for main cylinder and end cover, common to 20/25 HP & Phantom II models.13th Nov 1931Box 16 \ 5  Scan034
Oiling scheme for a link joint front axle damper.11th Nov 1931Box 16 \ 5  Scan035
Results of tests on self-adjustable hydraulic shock absorbers.11th Nov 1931Box 16 \ 5  Scan036
Tests measuring the movement and pumping action of shock damper levers at various speeds.9th Nov 1931Box 16 \ 5  Scan037
Test data table for rear dampers, measuring time for 360-degree rotation at various speeds on two different road surfaces.25th Nov 1931Box 16 \ 5  Scan038
Curves of axle movements for a Phantom I.25th Nov 1931Box 16 \ 5  Scan039
Graphical representation of rear axle motion experiments comparing different damping settings on various road conditions.29th Oct 1928Box 16 \ 5  Scan040
Graphs from experiments on rear axle motion under various road conditions and damping settings.26th Nov 1931Box 16 \ 5  Scan041
Standardisation of connecting links for hydraulic dampers.22th Sep 1931Box 16 \ 5  Scan042
Standardisation of connecting links for the hydraulic damper to overcome oil loss.12th Sep 1932Box 16 \ 5  Scan043
The design and testing of a front shock damper located outside the frame.31th Dec 1931Box 16 \ 5  Scan044
Performance and design of shock absorbers mounted outside the frame, including issues with ball bearings.14th Dec 1931Box 16 \ 5  Scan045
Outlining recommended settings for shock dampers and springs on 20/25 HP and 40/50 HP models.16th Dec 1931Box 16 \ 5  Scan046
Guide to shock damper and spring settings for various car models.16th Dec 1931Box 16 \ 5  Scan047
Standardizing shock damper settings and modifications.16th Dec 1931Box 16 \ 5  Scan048
Specification table for various front and rear suspension springs and damping setups.22th Sep 1931Box 16 \ 5  Scan049
Standardisation of chassis parts, specifically rear hydraulic dampers.22th Sep 1931Box 16 \ 5  Scan050
Standardisation record for rear hydraulic dampers.22th Aug 1932Box 16 \ 5  Scan051
Development and standardisation of controllable shock dampers for experimental cars.3rd Mar 1932Box 16 \ 5  Scan052
Temporary scheme for P.2 shock dampers with distant control.17th Mar 1932Box 16 \ 5  Scan053


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