| Description | Date | Identifier | |
| Cornering power of tires on different surfaces and under various loads. | 31th Dec 1936 | Box 170 \ 3 img115 | |
| Graph comparing steering angle versus lateral acceleration for various 1936 cars at manufacturer's recommended tire pressure. | 16th Nov 1936 | Box 170 \ 3 img116 | |
| Graph plotting and comparing the slip angles of a 1936 Cord and a Terraplane 6, analysing front-wheel drive effect and oversteer. | 16th Nov 1936 | Box 170 \ 3 img117 | |
| Letter from Rm. to Oy. discussing a company re-organisation, business partnerships, and sourcing road springs. | 5th Jul 1937 | Box 170 \ 3 img118 | |
| Letter to Maurice Olley arranging a meeting to discuss axles, coordinating around factory holiday closures. | 9th Jul 1937 | Box 170 \ 3 img119 | |
| Letter from Vauxhall Motors discussing spring suppliers and the specifications required for ordering. | 13th Jul 1939 | Box 170 \ 3 img120 | |
| Page 2 of a letter from Maurice Olley regarding spring test specifications, life expectancy, and materials. | 15th Jul 1937 | Box 170 \ 3 img121 | |
| Letter to M. Olley of Vauxhall Motors regarding a meeting to discuss road springs. | 15th Jul 1937 | Box 170 \ 3 img122 | |
| Letter enclosing a Cadillac La Salle Shop Manual on loan to Vauxhall Motors Ltd. | 20th Sep 1937 | Box 170 \ 3 img123 | |
| Letter from Vauxhall Motors discussing steering geometry, understeer, and the Ackermann angle. | 17th Nov 1937 | Box 170 \ 3 img124 | |
| Analysis of vehicle steering behavior and handling characteristics under lateral acceleration at different speeds. | 17th Nov 1937 | Box 170 \ 3 img125 | |
| Technical memorandum discussing vehicle handling dynamics, steering angles, and Ackermann geometry. | 17th Nov 1937 | Box 170 \ 3 img126 | |
| Letter from Maurice Olley to Mr. Grylls discussing Pontiac steering and the need for a large flat test area. | 17th Nov 1937 | Box 170 \ 3 img127 | |
| Hand-drawn graph comparing the steering angles and wheel angles of Ford, Studebaker, and Packard vehicles against Ackermann geometry. | 17th Nov 1937 | Box 170 \ 3 img128 | |
| Graph of vehicle dynamics characteristics for a 1937 Pontiac 8. | 22th Nov 1937 | Box 170 \ 3 img129 | |
| Letter discussing vehicle steering characteristics, namely under-steer and over-steer, in response to an article in 'Autocar'. | 22th Nov 1937 | Box 170 \ 3 img130 | |
| Letter from Vauxhall Motors discussing theories on steering, understeer, and caster effects. | 2nd Dec 1937 | Box 170 \ 3 img131 | |
| Hand-drawn graph comparing steering wheel angle and caster angle against lateral acceleration. | 9th Dec 1937 | Box 170 \ 3 img132 | |
| Letter to Vauxhall Motors discussing caster angle and querying the design of a Cadillac semi-floating rear axle. | 9th Dec 1937 | Box 170 \ 3 img133 | |
| Letter from Vauxhall Motors regarding rear wheel overhang, shaft design, and materials, with references to Cadillac models. | 20th Dec 1937 | Box 170 \ 3 img134 | |
| Letter to Vauxhall Motors regarding shock absorber attachments, spring gaiters, and a comparison of rubber bushes. | 22th Dec 1937 | Box 170 \ 3 img135 | |
| Blueprint of graphs comparing steering angle curves with and without various roll rods and tyre pressures. | 24th Dec 1937 | Box 170 \ 3 img136 | |
| Letter to Maurice Olley of Vauxhall Motors discussing vehicle axle performance and handling characteristics. | 24th Dec 1937 | Box 170 \ 3 img137 | |
| Graph plotting steering angle and torque curves against sideways G-force from a wet ramp skid pan test. | 22th Dec 1937 | Box 170 \ 3 img138 | |
| Letter from Vauxhall Motors Ltd discussing shock spindles, spring covers, and skid pad results. | 29th Dec 1937 | Box 170 \ 3 img139 | |
| Analysis of vehicle steering dynamics, roll, and tyre pressure effects from test data. | 29th Dec 1937 | Box 170 \ 3 img140 | |
| Letter from Maurice Olley to Mr. Grylls discussing the effects of traction, load, and braking on tyre cornering power and oversteer. | 29th Dec 1937 | Box 170 \ 3 img141 | |
| Graph of roadability curves for a 1937 Oldsmobile 6 Touring Sedan. | 13th May 1937 | Box 170 \ 3 img142 | |
| Roadability curves for a 1937 Oldsmobile 6 Touring Sedan showing various angles versus lateral acceleration. | 13th Sep 1937 | Box 170 \ 3 img143 | |
| Letter to Maurice Olley of Vauxhall Motors discussing oversteer, understeer, and skid-pan testing results. | 5th Jan 1938 | Box 170 \ 3 img144 | |
| Letter to M. Olley, Esq. discussing methods for measuring slip angles on a skid-pan. | 5th Jan 1938 | Box 170 \ 3 img145 | |
| Letter from Vauxhall Motors discussing tyre data on cornering force, braking, and driving based on U.S. Rubber Company tests. | 21th Jan 1938 | Box 170 \ 3 img146 | |
| Tyre performance characteristics including precession torque and camber thrust. | 21th Jan 1938 | Box 170 \ 3 img147 | |
| Analysis of vehicle dynamics including precession torque, rolling resistance, camber, and skid pad results. | 21th Jan 1938 | Box 170 \ 3 img148 | |
| Steering linkage elasticity, oversteer effects, and the performance of rear stabilizers at high speed. | 21th Jan 1938 | Box 170 \ 3 img149 | |
| Letter from Maurice Olley discussing vehicle roll stiffness, oversteer/understeer, and stability, with comparisons to competitor cars. | 21th Jan 1938 | Box 170 \ 3 img150 | |
| Postscript discussing the dynamics of rear-wheel steering and other miscellaneous design notes. | 21th Jan 1938 | Box 170 \ 3 img151 | |
| Hand-drawn graph showing a possible curve of cornering force against traction and braking. | 21th Jan 1938 | Box 170 \ 3 img152 | |
| Graph of Camber Thrust of a 6-16.4 tire against Camber Angle on emery cloth surfaces. | 21th Jan 1938 | Box 170 \ 3 img153 | |
| Graph plotting Camber Thrust against Tire Load for various camber angles and road surface types, noting the effect of a front stabilizer. | 21th Jan 1938 | Box 170 \ 3 img154 | |
| Graph showing camber thrust versus camber angle for a 7.5-16.6 tire on emery cloth. | 21th Jan 1938 | Box 170 \ 3 img155 | |
| Graph showing the relationship between tire load in pounds and camber. | 21th Jan 1938 | Box 170 \ 3 img156 | |
| Graph of precession torque for a 7 1/2 - 16.6 tire, with curves plotted for different slip angles. | 21th Jan 1938 | Box 170 \ 3 img157 | |
| Graph plotting recession against tire load for various angles. | 21th Jan 1938 | Box 170 \ 3 img158 | |
| Graph of precession torque for slip angle combined with camber angle of equal amount for a 6-16.4 tire. | 21th Jan 1938 | Box 170 \ 3 img159 | |
| Graph plotting a variable labelled 'Trecessi' against Degrees Slip Angle under different load conditions. | 21th Jan 1938 | Box 170 \ 3 img160 | |
| Graph from a U.S. Rubber dynamic test showing drag versus slip angle for a 6-16.4 tire. | 21th Jan 1938 | Box 170 \ 3 img161 | |
| Graph plotting load in LBS against an unlabelled variable at different angles. | 21th Jan 1938 | Box 170 \ 3 img162 | |
| Graph of steering angle curves plotted against percentage G-force and speed. | 21th Jan 1938 | Box 170 \ 3 img163 | |
| Graph of steering angle curves against speed for various cornering radii and conditions. | 24th Jan 1938 | Box 170 \ 3 img164 | |
| Letter to Vauxhall Motors regarding the supply of 1938 model spring covers and discussing suspension components. | 24th Jan 1938 | Box 170 \ 3 img165 | |
| Letter to Vauxhall Motors discussing a translated German paper, camber thrust, and tyre performance. | 2nd Feb 1938 | Box 170 \ 3 img166 | |
| Letter from Vauxhall Motors Ltd to S.H. Grylls discussing deceleration, braking tests, and tyre performance. | 8th Feb 1938 | Box 170 \ 3 img167 | |
| Letter from Maurice Olley discussing the theory of safe braking, including formulas for ideal front to rear brake force apportionment. | 8th Feb 1938 | Box 170 \ 3 img168 | |
| Graph plotting performance coefficients for various vehicle drive systems. | 8th Feb 1938 | Box 170 \ 3 img169 | |
| Graph and calculations comparing traction requirements for front-wheel and rear-wheel drive vehicles under acceleration. | 4th Mar 1938 | Box 170 \ 3 img170 | |
| Invitation to M. Olley of Vauxhall Motors to visit Derby and use the Skid Pan. | 4th Mar 1938 | Box 170 \ 3 img171 | |
| Letter to Vauxhall Motors regarding a sudden preference for squares over pressed-on levers on knurled shafts. | 11th Mar 1938 | Box 170 \ 3 img172 | |
| Inquiry to Vauxhall Motors regarding the reliability and safety of 4-ply tyres. | 3rd Dec 1938 | Box 170 \ 3 img173 | |
| Letter from Vauxhall Motors discussing discrepancies between Tyre & Rim Association and S.M.M.T. tyre loading charts. | 7th Dec 1938 | Box 170 \ 3 img174 | |
| Tyre performance, including rim widths, ply limits, inflation standards, and the introduction of Rayon fabric. | 7th Dec 1938 | Box 170 \ 3 img175 | |
| Drawbacks of Rayon manufacturing tax in England compared to the U.S. | 7th Dec 1938 | Box 170 \ 3 img176 | |
| Graph from the Tyre & Rim Association, USA, showing load and inflation data for 16 inch rims. | 7th Dec 1938 | Box 170 \ 3 img177 | |
| Graph of tyre load in pounds versus inflation pressure in pounds per square inch for various tyre sizes. | 7th Dec 1938 | Box 170 \ 3 img178 | |
| Graph showing SMMT load and inflation data for various tyre sizes on 16-inch rims. | 7th Dec 1938 | Box 170 \ 3 img179 | |
| Graph plotting tire load against inflation pressure for various 4-ply tire sizes. | 9th Dec 1938 | Box 170 \ 3 img180 | |
| Typed letter to M. Olley of Vauxhall Motors Ltd. acknowledging a letter to Grylls. | 9th Dec 1938 | Box 170 \ 3 img181 | |
| Letter to Vauxhall Motors regarding tyre specifications, comparing 4-ply and 6-ply tyres for comfort and steering. | 22th Dec 1938 | Box 170 \ 3 img182 | |
| Letter from Vauxhall Motors discussing tyre pressure limits and typical tyre sizes for American passenger cars. | 3rd Jan 1939 | Box 170 \ 3 img183 | |
| Letter from Maurice Olley to Mr. S.W. Grylls discussing the supply and safety benefits of Goodyear Lifeguard tubes. | 3rd Jan 1939 | Box 170 \ 3 img184 | |
| Notes on future car design discussing the rationalization of R.R. and Bentley models, dimensions and styling. | 6th Jun 1939 | Box 170 \ 3 img185 | |
| Design notes on vehicle dimensions, layout, and styling, with comparisons to American models. | 6th Jun 1939 | Box 170 \ 3 img186 | |
| Performance evaluation and test notes for an experimental car. | 6th Jun 1939 | Box 170 \ 3 img187 | |
| Letter from Vauxhall Motors Ltd regarding details of a Vauxhall Synchro Cone and arranging a visit. | 6th Jun 1939 | Box 170 \ 3 img188 | |
| Letter to M. Olley of Vauxhall Motors regarding a cancelled visit and a report on general car development. | 15th Jun 1939 | Box 170 \ 3 img189 | |
| Inquiry to Vauxhall Motors regarding a recommendation for an Olsen Spring test machine. | 14th Jul 1939 | Box 170 \ 3 img190 | |
| Letter to M. Olley of Vauxhall Motors Ltd. expressing condolences and arranging a visit to Luton. | 21th Jul 1939 | Box 170 \ 3 img191 | |
| Letter to Vauxhall Motors arranging a meeting and requesting information on various automotive components and test rigs. | 25th Jul 1939 | Box 170 \ 3 img192 | |
| Motor car development, highlighting advancements in American cars. | 25th Jul 1939 | Box 170 \ 3 img193 | |
| Critique of the American 'styling' trend, its influence on product design, and the push for yearly motorcar model changes. | 25th Jul 1939 | Box 170 \ 3 img194 | |
| The evolution of car body design, aesthetics, and space efficiency. | 25th Jul 1939 | Box 170 \ 3 img195 | |
| Critique of 1939 American car design, specifically the Lincoln Zephyr and Oldsmobile 8, focusing on undesirable features. | 25th Jul 1939 | Box 170 \ 3 img196 | |
| Critique of American automotive styling trends, arguing that engineering progress is being sacrificed for aesthetics. | 25th Jul 1939 | Box 170 \ 3 img197 | |
| Commentary on the automotive industry, comparing American and British designs and discussing market trends. | 25th Jul 1939 | Box 170 \ 3 img198 | |
| Comparison of British and American automotive design, critiquing engineering, materials, and manufacturing. | 25th Jul 1939 | Box 170 \ 3 img199 | |
| Analysis of the weaknesses in English manufacturing and parts supply compared to the American motor industry. | 25th Jul 1939 | Box 170 \ 3 img200 | |
| Memorandum on the future of the car business, brand positioning, and the feasibility of a smaller car model. | 25th Jul 1939 | Box 170 \ 3 img201 | |
| Small car design, focusing on weight control, stability, and the advantages of steel body construction. | 25th Jul 1939 | Box 170 \ 3 img202 | |
| The feasibility and methods for producing sheet-steel car bodies in moderate quantities, referencing developments in the aircraft industry. | 25th Jul 1939 | Box 170 \ 3 img203 | |
| The acoustic challenges of steel car body construction and the future need for a specialized underbody. | 25th Jul 1939 | Box 170 \ 3 img204 | |
| The design philosophy of 'style' over 'styling' in car appearance. | 25th Jul 1939 | Box 170 \ 3 img205 | |
| Analysis of American car design regarding wheelbase, radiator placement, and suspension systems. | 25th Jul 1939 | Box 170 \ 3 img206 | |
| The use of Panhard rods on axles for side control and handling. | 25th Jul 1939 | Box 170 \ 3 img207 | |
| Requesting detail drawings for the 13.2 m/m gun to facilitate production of parts in the United States. | 27th Jun 1940 | Box 170 \ 4 img001 | |
| Corrosion issues with the recoil springs for the Bren gun. | 22th Mar 1940 | Box 170 \ 4 img002 | |
| Listing the print numbers for the first batch of the 13.2 mm. R.O. gun. | 1st Jul 1940 | Box 170 \ 4 img003 | |
| Request for a general arrangement drawing of a gun to provide an overview of the project. | 2nd Jul 1940 | Box 170 \ 4 img004 | |
| Listing gun drawings, grouped by size, to be dispatched to America. | 2nd Jul 1940 | Box 170 \ 4 img005 | |
| Preliminary arrangement of a 13.2 mm gun. | 12th Jul 1940 | Box 170 \ 4 img006 | |
| Request to despatch two wooden models of parts to Maurice Olley to be machined. | 12th Jul 1940 | Box 170 \ 4 img007 | |
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