| Description | Date | Identifier | |
| Correction of a clerical error regarding the strength percentage of 'SS' shock dampers. | 22th Jan 1929 | Box 16 \ 4 Scan058 | |
| Proposal for an improved lubrication scheme for the front axle control damper ball end. | 29th Jan 1929 | Box 16 \ 4 Scan059 | |
| Improved lubrication scheme for the 'SS' Front Shock Damper. | 6th Feb 1929 | Box 16 \ 4 Scan060 | |
| Design improvements for hydraulic shock dampers, including valve modifications and spring-loaded connecting links. | 15th Feb 1929 | Box 16 \ 4 Scan061 | |
| Proposing a modification by drilling a hole in the valve of the 'SS' rear shock damper. | 1st Mar 1929 | Box 16 \ 4 Scan062 | |
| Requesting to drill a 0.062' hole through the valve of the 'SS' rear shock damper. | 1st Mar 1929 | Box 16 \ 4 Scan063 | |
| Telegram regarding car frame and suspension modifications. | 22th Mar 1929 | Box 16 \ 4 Scan064 | |
| Issues with rear hydraulics and drilled high-pressure valves on 'SS' model cars following testing on French roads. | 26th Mar 1929 | Box 16 \ 4 Scan065 | |
| Investigation into a modification made to '3S' rear dampers on cars sent to France. | 28th Mar 1929 | Box 16 \ 4 Scan066 | |
| Instructions for adjusting low and high-pressure valves on hydraulic dampers for car 18-EX. | 6th Apr 1929 | Box 16 \ 4 Scan067 | |
| Instructions for altering valve loadings on front hydraulic dampers by replacing washers. | 6th Apr 1929 | Box 16 \ 4 Scan068 | |
| Instructions for modifying dampers by adding packing pieces and removing dynamic restrictions. | 1st Apr 1929 | Box 16 \ 4 Scan069 | |
| Design principles and issues of shock dampers, such as leaks and knocking. | 1st Apr 1929 | Box 16 \ 4 Scan070 | |
| Continued report on road test findings for a 20 HP car, detailing issues with dampers and a heavy Hooper body. | 9th Apr 1929 | Box 16 \ 4 Scan071 | |
| Design issue where a conduit blocks access to the high-pressure valve on rear shock absorbers. | 9th Apr 1929 | Box 16 \ 4 Scan072 | |
| Modification of 'SS' Hydraulic Dampers for 20 HP and SS models. | 9th Apr 1929 | Box 16 \ 4 Scan073 | |
| Adjustments and performance testing of hydraulic dampers on various test cars. | 9th Apr 1929 | Box 16 \ 4 Scan074 | |
| Methods for silencing 20 HP rear dampers, with diagrams illustrating load characteristics. | 9th Apr 1929 | Box 16 \ 4 Scan075 | |
| Adjustments to hydraulic dampers, including sending parts and instructions for test cars. | 9th Apr 1929 | Box 16 \ 4 Scan076 | |
| Report discussing methods for silencing 20 HP rear dampers, with graphs illustrating load characteristics. | 19th Apr 1929 | Box 16 \ 4 Scan077 | |
| Design principles, performance issues, and testing of hydraulic dampers. | 19th Apr 1929 | Box 16 \ 4 Scan078 | |
| Letter regarding the dispatch of a complete N.S. front shock absorber with a strengthened case. | 11th Apr 1929 | Box 16 \ 4 Scan079 | |
| Fractured shock absorber casing, suggesting a design change and noting a related steering issue. | 11th Apr 1929 | Box 16 \ 4 Scan080 | |
| Failure of a strengthened front shock absorber and proposing modifications. | 11th Apr 1929 | Box 16 \ 4 Scan081 | |
| The provision for load adjustment on 'SS' Hydraulic Dampers. | 1st Apr 1929 | Box 16 \ 4 Scan082 | |
| Recommendations for adjusting valve and damper spring loads using distance washers. | 1st Apr 1929 | Box 16 \ 4 Scan083 | |
| Technical memorandum detailing specifications for front dampers, including valve cap depths and spring loads. | 1st Apr 1929 | Box 16 \ 4 Scan084 | |
| Blueprint detailing valve cap dimensions for S.S. Hydraulic Dampers. | 13th Apr 1929 | Box 16 \ 4 Scan085 | |
| Blank document page with a date stamp in the bottom right corner. | 13th Apr 1929 | Box 16 \ 4 Scan086 | |
| Set of four graphs detailing the adjustment of S.S. damper loads for front and rear shock absorbers. | 19th Apr 1929 | Box 16 \ 4 Scan087 | |
| Request for a valve spring for front and rear dampers with a 50% greater maximum load. | 19th Apr 1929 | Box 16 \ 4 Scan088 | |
| Reporting that a rear shock absorber bracket is not strong enough and requires strengthening. | 25th Apr 1929 | Box 16 \ 4 Scan089 | |
| Secret memorandum regarding scheme 2883 for the S.S. rear shock damper, detailing design changes. | 25th Apr 1929 | Box 16 \ 4 Scan090 | |
| Strengthening of a bent rear shock damper bracket on the 'SS' rear axle. | 1st May 1929 | Box 16 \ 4 Scan091 | |
| Request for details regarding tests on hydraulic shock absorbers. | 1st May 1939 | Box 16 \ 4 Scan092 | |
| Modifications to the front and rear dampers for 'SS' Chassis 'J2' Series, involving stronger valve springs and modified valve cover plugs. | 3rd May 1929 | Box 16 \ 4 Scan093 | |
| Specifying the load requirements for front and rear dampers being built for car 21#-EX. | 9th May 1929 | Box 16 \ 4 Scan094 | |
| Patented idea for automatically controlled shock dampers using an air spring. | 5th Sep 1929 | Box 16 \ 4 Scan095 | |
| Secret memo regarding modifications to SS. Hydraulic Dampers to eliminate dynamic restrictions. | 14th May 1929 | Box 16 \ 4 Scan096 | |
| Stronger valve springs for S.S. shock dampers. | 16th May 1929 | Box 16 \ 4 Scan097 | |
| Letter from the American branch querying the UK branch about the geometry and twisting effects of front shock absorbers and axle control. | 13th Jun 1929 | Box 16 \ 4 Scan098 | |
| Proposal concerning end movement in the spindle on the non-steering side to control axle torsion. | 1st Jun 1929 | Box 16 \ 4 Scan099 | |
| On testing shock absorber valve springs, noting issues with supplied parts and suggesting new specifications. | 1st Jun 1929 | Box 16 \ 4 Scan100 | |
| Test results for F.76548 springs used in S.S.+ rear shock dampers. | 1st Jun 1929 | Box 16 \ 4 Scan101 | |
| Specifications for S.S. Rear Shock Damper springs, detailing compression lengths and pressure data. | 1st Jul 1929 | Box 16 \ 4 Scan102 | |
| Shock absorber knocks and potential modifications to high-pressure valves on 20 HP and 40/50 HP models. | 1st Jul 1929 | Box 16 \ 4 Scan103 | |
| Practice of drilling high pressure valves on shock dampers to resolve knocking issues. | 4th Jul 1929 | Box 16 \ 4 Scan104 | |
| Standardisation of hydraulic dampers for the '3.S' model, including loading specifications and production recommendations. | 7th Aug 1929 | Box 16 \ 4 Scan105 | |
| Laborious process of adjusting vehicle loads and proposing tools and adjusting washers for the 'S.S' suspension. | 7th Aug 1929 | Box 16 \ 4 Scan106 | |
| Proposed depot testing lever for front hydraulic dampers. | 5th Jul 1929 | Box 16 \ 4 Scan107 | |
| Blueprint for a testing tool for S.S. front dampers. | 23th Jul 1929 | Box 16 \ 4 Scan108 | |
| Blueprint for a shock damper lever for load checking and suggestions for its production. | 12th Aug 1929 | Box 16 \ 4 Scan109 | |
| Alterations to shock damper loads, including spring changes and dimensional adjustments. | 15th Aug 1929 | Box 16 \ 4 Scan110 | |
| The modification and adjustable load settings for Phantom II hydraulic shock absorbers. | 1st Oct 1929 | Box 16 \ 4 Scan111 | |
| Technical memo detailing adjustments to Phantom II suspension to address high-speed wobble. | 15th Oct 1929 | Box 16 \ 4 Scan112 | |
| Listing recommended improved parts to be incorporated into the Phantom II production. | 15th Oct 1929 | Box 16 \ 4 Scan113 | |
| Discussion document about potential modifications to the luggage grid, radiator filter, central lubrication, radiator shape, and shock absorbers. | 15th Oct 1929 | Box 16 \ 4 Scan114 | |
| Issues with shock absorbers, wear, and load adjustments. | 5th Nov 1929 | Box 16 \ 4 Scan115 | |
| Cover note for attached recommendations regarding increased poundage on shock absorbers. | 5th Nov 1929 | Box 16 \ 4 Scan116 | |
| The procedure for increasing the poundage on rear shock absorbers for a trials car. | 13th Nov 1929 | Box 16 \ 4 Scan117 | |
| Depot sheet concerning adjustments to Phantom II hydraulic shock absorbers. | 13th Nov 1929 | Box 16 \ 4 Scan118 | |
| Instructions and recommendations for adjusting vehicle shock absorber loads and related components. | 18th Nov 1929 | Box 16 \ 4 Scan119 | |
| Ongoing issues with knocking shock dampers and potential solutions. | 18th Nov 1929 | Box 16 \ 4 Scan120 | |
| Request for a report on shock damper troubles, specifically knocking and wear, to aid in design improvements. | 29th Nov 1929 | Box 16 \ 4 Scan121 | |
| The HP valve settings for Phantom 1 shock absorbers. | 2nd Dec 1929 | Box 16 \ 4 Scan122 | |
| Production issues with the anchorage of front brake shoes and the location of the fulcrum. | 4th Dec 1929 | Box 16 \ 4 Scan123 | |
| Schemes for shock damper strokes and damping levels. | 14th Dec 1929 | Box 16 \ 4 Scan124 | |
| New schemes for the Phantom II shock dampers, specifically a new connecting rod design. | 13th Dec 1929 | Box 16 \ 4 Scan125 | |
| Design of shock absorber shafts, comparing a Woodruff key and splined taper. | 7th Dec 1929 | Box 16 \ 4 Scan126 | |
| Specifications for drilled shock damper valves, specifically hole diameters for 20 HP and Phantom models. | 10th Dec 1929 | Box 16 \ 4 Scan127 | |
| Use and history of drilled shock absorber valves in hydraulic dampers. | 10th Dec 1929 | Box 16 \ 4 Scan128 | |
| Use of drilled valves and dampers on Phantom I and II models to improve low-speed riding. | 10th Dec 1929 | Box 16 \ 4 Scan129 | |
| Modifications and new specifications for Phantom II shock absorbers. | 12th Dec 1929 | Box 16 \ 4 Scan130 | |
| New design proposal for shock dampers using small air vessels. | 13th Dec 1929 | Box 16 \ 4 Scan131 | |
| Improving lubrication for shock absorber connection ball ends by adding a groove. | 6th Feb 1930 | Box 16 \ 4 Scan132 | |
| Improving car suspension by cross-connecting hydraulic dampers to counter shimmy and pitching. | 10th Feb 1930 | Box 16 \ 4 Scan133 | |
| Request to obtain a pair of S.S. rear shock absorbers from Production for a bump test. | 24th Feb 1930 | Box 16 \ 4 Scan134 | |
| Torsional frame weakness, which prevents increased shock absorber damping and is related to radiator 'jellying'. | 24th Feb 1930 | Box 16 \ 4 Scan135 | |
| The detailing of schemes for fitting friction shock absorbers to an experimental S.S. car for testing. | 8th Mar 1930 | Box 16 \ 4 Scan136 | |
| Test report on an engine foot mounted shock damper, including load and deflection data. | 10th Mar 1930 | Box 16 \ 4 Scan137 | |
| The redesign of a cross shaft and damper as part of the crankcase. | 27th Mar 1930 | Box 16 \ 4 Scan138 | |
| Test report on radiator jellying, comparing the effects of different spring and shock absorber setups on steering and vehicle performance. | 27th Mar 1930 | Box 16 \ 4 Scan139 | |
| Page 2 of a report on body distortion and radiator 'jellying'. | 7th Apr 1930 | Box 16 \ 4 Scan140 | |
| Request for three specific parts required for testing as soon as possible. | 7th Apr 1930 | Box 16 \ 4 Scan141 | |
| Graphs showing ball pin loads versus adjusting washer thickness for Phantom II front and rear hydraulic shock dampers. | 5th May 1930 | Box 16 \ 4 Scan142 | |
| Complaint detailing design flaws in the shock dampers and central lubrication system for the Phantom II. | 5th May 1930 | Box 16 \ 4 Scan143 | |
| Modifications to an oiling system and the cause of complaints regarding seasickness due to insufficient damping. | 5th May 1930 | Box 16 \ 4 Scan144 | |
| Springs and damping for the Phantom II and 25 HP models, following experiences on American and European roads. | 14th May 1930 | Box 16 \ 4 Scan145 | |
| Proposals for modifications to shock dampers. | 10th May 1930 | Box 16 \ 4 Scan146 | |
| Schemes for front shock dampers and centralised lubrication for the Phantom II. | 11th May 1930 | Box 16 \ 4 Scan147 | |
| Modifications to the central lubrication system for front shock dampers. | 12th May 1930 | Box 16 \ 4 Scan148 | |
| Technical report discussing rear dampers, oil admixture, and axle movements. | 12th May 1930 | Box 16 \ 4 Scan149 | |
| Recommendations for resolving Phantom II steering complaints. | 13th Jun 1930 | Box 16 \ 4 Scan150 | |
| Technical note detailing adjustments for steering toe-in, poundage, and shock absorber issues. | 13th Jun 1930 | Box 16 \ 4 Scan151 | |
| Potential causes of poor steering, with a diagram for testing the cross-steering tube load. | 13th May 1930 | Box 16 \ 4 Scan152 | |
| Blueprint detailing tolerances and poundage required for a cross steering tube. | 13th May 1930 | Box 16 \ 4 Scan153 | |
| Pros and cons of using stiffer springs on Phantom II and 20 HP cars. | 14th May 1930 | Box 16 \ 4 Scan154 | |
| Analysis of customer complaints regarding low-speed dithering and high-speed pitching, primarily concerning Phantom models. | 14th May 1930 | Box 16 \ 4 Scan155 | |
| Vehicle suspension issues, including spring ratings, deflection, and steering complaints on the Phantom I. | 14th May 1930 | Box 16 \ 4 Scan156 | |
| Poor road holding at high speeds, mentioning suspension modifications for specific drivers and proposing new front suspension designs. | 14th May 1930 | Box 16 \ 4 Scan157 | |
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