| Description | Date | Identifier | |
| Report C from a conference detailing proposed alterations for American Rolls-Royce cars regarding steering and suspension. | 2nd Dec 1919 | Box 43 \ 2 Scan003 | |
| Proposed alterations for American cars, covering luggage carriers, body mounting, and rear spring shackles. | 2nd Dec 1919 | Box 43 \ 2 Scan004 | |
| Chassis lubrication, battery placement, American market modifications, and starter/pump options. | 2nd Dec 1919 | Box 43 \ 2 Scan005 | |
| List of parts sent from the United States, detailing the experimental work required for each. | 30th Jan 1920 | Box 43 \ 2 Scan006 | |
| Bump rig tests of split rear springs fitted with extra clips, detailing the results and various leaf breakage times. | 12th Apr 1920 | Box 43 \ 2 Scan007 | |
| The unreliability of present rear springs compared to pre-War models, recommending a return to the old type. | 12th Apr 1920 | Box 43 \ 2 Scan008 | |
| Issues with rear spring plate breakages and the decision to revert to a pre-war design. | 13th Apr 1920 | Box 43 \ 2 Scan009 | |
| Rear springs, confirming a cable has been sent to America as requested. | 21th Apr 1920 | Box 43 \ 2 Scan010 | |
| Cable sent to Springfield with instructions to halt production of rear springs. | 21th Apr 1920 | Box 43 \ 2 Scan011 | |
| Export of parts to America for the American-built chassis and a discussion about road springs. | 18th May 1920 | Box 43 \ 2 Scan012 | |
| Continued memorandum discussing a proposal to supply information and obtain a settlement. | 8th Jan 1920 | Box 43 \ 2 Scan013 | |
| Recommendation to use pre-war rear springs for American chassis due to reliability and reduced squeaking. | 30th Jul 1920 | Box 43 \ 2 Scan014 | |
| Ordering road springs for Rolls-Royce of America, Inc. and potential delays due to supplier holidays and pattern changes. | 1st Aug 1920 | Box 43 \ 2 Scan015 | |
| Cable detailing a complaint about 'American springing' and a recommendation on suspension setup. | 8th Oct 1920 | Box 43 \ 2 Scan016 | |
| Cover note for a cablegram received from Rolls-Royce of America Inc. and copies of other related cablegrams. | 5th Nov 1920 | Box 43 \ 2 Scan017 | |
| Copy of a decoded cablegram from the Springfield, America office regarding production parts. | 5th Nov 1920 | Box 43 \ 2 Scan018 | |
| Copy of a cablegram to Springfield regarding a shipment of goods. | 3rd Nov 1920 | Box 43 \ 2 Scan019 | |
| Clarifying a mutilated telegram regarding the supply of springs for the American market. | 29th Oct 1920 | Box 43 \ 2 Scan020 | |
| Copy of a cablegram to Claude Johnson in New York regarding shock dampers, springs, and an experimental car. | 18th Oct 1920 | Box 43 \ 2 Scan021 | |
| Fitting of thin leaf springs and a friction device to the steering pivots on all American cars. | 9th Nov 1920 | Box 43 \ 2 Scan022 | |
| Points for attention regarding post-war American cars, specifically rear springs, front steering pivots, and ignition. | 11th Nov 1920 | Box 43 \ 2 Scan023 | |
| Technical memorandum discussing spring shackle clearance and the use of sheet nickel silver for radiators. | 11th Nov 1920 | Box 43 \ 2 Scan024 | |
| The fitting of thin leaf springs and a friction device to the steering pivots on all American cars. | 17th Nov 1920 | Box 43 \ 2 Scan025 | |
| Strength of springs fitted to cars for the American market and the decision not to claim costs for changes. | 17th Nov 1920 | Box 43 \ 2 Scan026 | |
| Outlining recommendations for replacing thick leaf rear springs with thin leaf springs on cars for the American market. | 17th Nov 1920 | Box 43 \ 2 Scan027 | |
| From CJ to EP asking for remarks on a proposal about 'Springs for America' following a telephone message from Mr. Royce. | 12th Nov 1920 | Box 43 \ 2 Scan028 | |
| Telephone message about the decision to use thin leaf springs for American cars and the cost of rectifying a previous error. | 12th Nov 1920 | Box 43 \ 2 Scan029 | |
| Instructions for fitting thin leaf springs to American cars. | 25th Nov 1920 | Box 43 \ 2 Scan030 | |
| Cablegram from Springfield, USA to London, UK with a coded message and its handwritten decoded translation about car parts. | 2nd Apr 1921 | Box 43 \ 2 Scan031 | |
| The testing of two different 13-leaf bumper chassis springs. | 21th Jul 1921 | Box 43 \ 2 Scan032 | |
| Comparing the durability of American-manufactured front springs against standard Woodhead springs via bump testing. | 10th Aug 1921 | Box 43 \ 2 Scan033 | |
| Laboratory analysis comparing the chemical composition and grain structure of an American spring and a Woodhead's spring. | 11th Aug 1921 | Box 43 \ 2 Scan034 | |
| Failure of American-made springs due to faulty heat-treatment. | 2nd Sep 1921 | Box 43 \ 2 Scan035 | |
| The inspection process for heat-treating and testing springs. | 2nd Sep 1921 | Box 43 \ 2 Scan036 | |
| Material selection for Goshawk 11 frames. | 12th Oct 1921 | Box 43 \ 2 Scan037 | |
| Laboratory analysis of 'Very good American Spring No. 2'. | 7th Sep 1921 | Box 43 \ 2 Scan038 | |
| On the superior test results of front springs supplied from the U.S.A compared to Woodhead Springs. | 20th Sep 1921 | Box 43 \ 2 Scan039 | |
| Laboratory analysis of the chemical composition and hardness of an American spring. | 7th Sep 1921 | Box 43 \ 2 Scan040 | |
| Inter-office correspondence discussing spring breakages and weight distribution, comparing American and English cars. | 10th Jun 1922 | Box 43 \ 2 Scan041 | |
| Front and rear spring clearances, bumping issues, and the effects of spring lubrication. | 10th Jun 1922 | Box 43 \ 2 Scan042 | |
| Technical discussion on rear spring lubrication, bouncing frequency, and design comparison between pre-war and post-war models. | 10th Jun 1922 | Box 43 \ 2 Scan043 | |
| Spring specifications and performance characteristics for various vehicle body types. | 10th Jun 1922 | Box 43 \ 2 Scan044 | |
| Breakdown of vehicle weight distribution between the front and rear wheels for springing calculations. | 10th Jun 1922 | Box 43 \ 2 Scan045 | |
| Cover note for an attached report concerning a Rear Spring Roller received from Springfield. | 10th Aug 1923 | Box 43 \ 2 Scan046 | |
| Letter regarding a report on an hourglass-shaped rear spring roller to prevent noise, noting an omitted sketch is now attached. | 28th Jul 1923 | Box 43 \ 2 Scan047 | |
| Design proposal for an 'Hour Glass' type of rear spring roller. | 27th Jul 1927 | Box 43 \ 2 Scan048 | |
| Request to compare sample 40/50 HP front and rear axle springs from Springfield with current supplies from Messrs. Woodhead. | 10th Aug 1923 | Box 43 \ 2 Scan049 | |
| Letter received from Springfield concerning shackles. | 20th Aug 1923 | Box 43 \ 2 Scan050 | |
| Letter addressing complaints of wear and rattle in shackle pins and proposing an alternative design. | 8th Aug 1923 | Box 43 \ 2 Scan051 | |
| Page 2 of a memo proposing a modified device scheme to Mr. Royce for increased convenience and decreased service cost. | 10th Aug 1910 | Box 43 \ 2 Scan052 | |
| Design drawings and suggestions for adjustable shackles. | 10th Aug 1910 | Box 43 \ 2 Scan053 | |
| Cover note for an inspection report on sample axle springs from Springfield. | 14th Dec 1923 | Box 43 \ 2 Scan054 | |
| Test report comparing two U.S.A. springs against drawing specifications. | 20th Aug 1923 | Box 43 \ 2 Scan055 | |
| Case 187 containing various spring insulators and bearing plates for Rolls-Royce of America Inc. | 22th Aug 1924 | Box 43 \ 2 Scan056 | |
| The distribution of chassis and body weights between the front and rear wheels. | 28th Jun 1925 | Box 43 \ 2 Scan057 | |
| Table detailing the distribution of chassis and body weights for various car models. | 26th Jun 1925 | Box 43 \ 2 Scan058 | |
| Table of riding complaints and their probable causes related to front and rear suspension. | 8th Feb 1926 | Box 43 \ 2 Scan059 | |
| Analysis and comparison of American car springs with English springs. | 13th Jul 1925 | Box 43 \ 2 Scan060 | |
| Comparison of a front spring fitted to a Springfield chassis with a Woodhead spring. | 21th Jul 1925 | Box 43 \ 2 Scan061 | |
| Specification and comparison sheet for the front springs of American Chassis S-107-MK. | 17th Jul 1920 | Box 43 \ 2 Scan062 | |
| Blank document page with a red 'Print Room' stamp from Derby. | 20th Jul 1925 | Box 43 \ 2 Scan063 | |
| Query seeking further details on the manufacturing differences between American and Woodhead springs, particularly regarding plate accuracy and heat treatment. | 24th Jul 1925 | Box 43 \ 2 Scan064 | |
| Requesting a reply to an attached document concerning Road Spring Bumping Tests. | 19th Sep 1925 | Box 43 \ 2 Scan065 | |
| Letter requesting information on road spring bumping tests and specifications for spring steel. | 8th Sep 1925 | Box 43 \ 2 Scan066 | |
| Poor quality of front springs on the Phantom and 20 HP models and suggesting further investigation. | 23th Sep 1925 | Box 43 \ 2 Scan067 | |
| Revised road spring schedule and weight calculations for various car models. | 28th Oct 1925 | Box 43 \ 2 Scan068 | |
| Table of frame clearance measurements for various car models with and without passengers. | 20th Oct 1925 | Box 43 \ 2 Scan069 | |
| Blueprint for a front shock absorber spring. | 28th Aug 1925 | Box 43 \ 2 Scan070 | |
| Cover note attaching a copy of a letter from Mr. Fuller for information. | 11th Nov 1925 | Box 43 \ 2 Scan071 | |
| Letter from the American branch to the UK branch regarding the in-house manufacturing of road springs. | 30th Oct 1925 | Box 43 \ 2 Scan072 | |
| From Mr. Nadin to Mr. Beaver regarding the proposal to manufacture front springs in-house. | 28th Oct 1925 | Box 43 \ 2 Scan073 | |
| Difficulties in sourcing high-quality springs from various suppliers, leading to the decision to manufacture them in-house. | 28th Oct 1925 | Box 43 \ 2 Scan074 | |
| The manufacturing process for vehicle springs. | 28th Oct 1925 | Box 43 \ 2 Scan075 | |
| Manufacturing process and equipment for vehicle springs. | 28th Oct 1925 | Box 43 \ 2 Scan076 | |
| List of machines and costs required for producing springs. | 28th Oct 1925 | Box 43 \ 2 Scan077 | |
| Results of riding tests, focusing on seat cushion damping and comfort. | 14th Dec 1925 | Box 43 \ 2 Scan078 | |
| Ride quality experiments comparing balloon and cord tires, and discussing the psychology of riding comfort. | 14th Dec 1925 | Box 43 \ 2 Scan079 | |
| Improvements to vehicle ride comfort through adjustments to suspension, coachwork, and tires. | 14th Dec 1925 | Box 43 \ 2 Scan080 | |
| Typed page discussing a working line and a limit that has been reached. | 14th Dec 1925 | Box 43 \ 2 Scan081 | |
| Graph plotting the results of riding tests with Mack engineers, comparing different vehicle cushion and damping setups on a varied course. | 14th Dec 1925 | Box 43 \ 2 Scan082 | |
| Graph of riding test results at various speeds on concrete, comparing different vehicle cushion and floor setups. | 22th Sep 1923 | Box 43 \ 2 Scan083 | |
| Letter discussing vehicle riding qualities and the desire for more flexible front springs, with comparisons to competitor vehicles. | 18th Dec 1925 | Box 43 \ 2 Scan084 | |
| Study on spring suspension frequency related to deflection and passenger comfort. | 18th Dec 1925 | Box 43 \ 2 Scan085 | |
| Comparison of spring weights and specifications for different sedan models. | 18th Dec 1925 | Box 43 \ 2 Scan086 | |
| Procedures followed to improve the riding on model 12-MC. | 18th Dec 1925 | Box 43 \ 2 Scan087 | |
| Test report on front spring deflection, ratings, and ride quality modifications. | 18th Dec 1925 | Box 43 \ 2 Scan088 | |
| The results of tests on a 1150 lb. spring with different axle clips. | 18th Dec 1925 | Box 43 \ 2 Scan089 | |
| Technical note on spring lubrication and the effect of brakes on road clearance. | 18th Dec 1925 | Box 43 \ 2 Scan090 | |
| Letter from Maurice Olley to E.W. Hives discussing a Norton accelerometer record of riding on a rough road. | 8th Feb 1926 | Box 43 \ 2 Scan091 | |
| Personal letter discussing tests and feedback on the riding quality of the Phantom model. | 8th Feb 1926 | Box 43 \ 2 Scan092 | |
| Phantom ride quality issues, comparing English and American road conditions and discussing spring modifications. | 8th Feb 1926 | Box 43 \ 2 Scan093 | |
| Acceleration testing machines and various types of shock absorbers. | 8th Feb 1926 | Box 43 \ 2 Scan094 | |
| Car springing, weight distribution, and comparing specifications between Springfield and Derby plants. | 8th Feb 1926 | Box 43 \ 2 Scan095 | |
| Detailed analysis of vehicle weight distribution, including front, passenger, and coachwork weights for various car models. | 8th Feb 1926 | Box 43 \ 2 Scan096 | |
| Letter discussing coachwork weight allowance and an attached diagnosis table for springing complaints. | 8th Feb 1926 | Box 43 \ 2 Scan097 | |
| Personal letter from Maurice Olley to E. W. Hives regarding front spring design and its effect on ride and steering. | 10th Feb 1928 | Box 43 \ 2 Scan098 | |
| Drawing of a front spring bush. | 28th Jan 1926 | Box 43 \ 2 Scan099 | |
| American report on vehicle springing, focusing on axle weight distribution and axle-pad design. | 1st Mar 1926 | Box 43 \ 2 Scan100 | |
| Letter discussing methods for measuring vehicle ride quality and its importance for sales. | 10th Mar 1926 | Box 43 \ 2 Scan101 | |
| Vehicle suspension, ride quality, testing instruments, and the impact of balloon tires. | 10th Mar 1926 | Box 43 \ 2 Scan102 | |
| | | | |