| Description | Date | Identifier | |
| Specifying tolerances and conditions for the New Phantom steering system. | 30th Sep 1926 | Box 67 \ 4 scan0179 | |
| Front axle tests investigating the effect of braking on steering, particularly when the steering is on a lock. | 1st Oct 1926 | Box 67 \ 4 scan0180 | |
| Analysis of steering and braking control, focusing on the danger of leaning pivots and the effects of spring strength. | 1st Oct 1926 | Box 67 \ 4 scan0181 | |
| Brake testing, focusing on the effects of 'out of centrepoint' settings on steering and vehicle safety. | 1st Oct 1926 | Box 67 \ 4 scan0182 | |
| Braking, steering, and the advantages of helical springs for front axle design. | 1st Oct 1926 | Box 67 \ 4 scan0183 | |
| Required spring load for a friction plate device on a pivot to improve steering. | 1st Oct 1926 | Box 67 \ 4 scan0184 | |
| Testing of low-pressure tyres on Phantom models and their effect on steering. | 6th Oct 1926 | Box 67 \ 4 scan0185 | |
| Tyre mileage, comparing performance in different weather conditions and the characteristics of low-pressure tyres. | 6th Oct 1926 | Box 67 \ 4 scan0186 | |
| Letter from Dunlop Rubber Co. detailing tyre wear data for different sizes and seasonal performance. | 6th Oct 1926 | Box 67 \ 4 scan0187 | |
| Performance and issues of the 0.940' steering system, including road shocks, joggle, and high-speed wobble. | 6th Oct 1926 | Box 67 \ 4 scan0188 | |
| Steering wobble, the conflict between self-righting and irreversibility, and proposing a patentable spring-based solution. | 6th Oct 1926 | Box 67 \ 4 scan0189 | |
| On tests conducted on hydraulic shock dampers for steering with a lighter axle, comparing different load settings. | 1st Oct 1926 | Box 67 \ 4 scan0190 | |
| Specification for the maximum movement allowable in the Phantom steering wheel, measured at the rim. | 8th Oct 1926 | Box 67 \ 4 scan0191 | |
| Implementation and benefits of hydraulic dampers for steering to prevent wobble. | 11th Oct 1926 | Box 67 \ 4 scan0192 | |
| Steering shocks, breaking springs, and addressing high-speed steering wobbles ('shimmy'). | 11th Oct 1926 | Box 67 \ 4 scan0193 | |
| Undesirable features found during tests of a hydraulic steering damper. | 12th Oct 1926 | Box 67 \ 4 scan0194 | |
| Comparison between frictional load and spring-controlled hydraulic damping for vehicle steering. | 29th Oct 1926 | Box 67 \ 4 scan0195 | |
| Phantom tyres, noting their susceptibility to high-speed wobbles and the need for new instruction book notes. | 29th Oct 1926 | Box 67 \ 4 scan0196 | |
| The effects of low-pressure tyres on the steering of the 40/50 HP model. | 29th Oct 1926 | Box 67 \ 4 scan0197 | |
| How tyre manufacturing defects can cause vibration and poor steering. | 30th Oct 1926 | Box 67 \ 4 scan0198 | |
| Requesting a copy of a mislaid note concerning the final requirements for friction on steering gear ball ends. | 30th Oct 1926 | Box 67 \ 4 scan0199 | |
| Potential steering stiffness due to lubrication issues in spring-loaded ball joints. | 2nd Nov 1926 | Box 67 \ 4 scan0200 | |
| Listing proposed modifications for the 'New Phantom' steering system. | 2nd Nov 1926 | Box 67 \ 4 scan0201 | |
| Answering technical queries regarding the Phantom model's steering system and front axle components. | 4th Nov 1926 | Box 67 \ 4 scan0202 | |
| Calculations for steering friction plates and damper components. | 4th Nov 1926 | Box 67 \ 4 scan0203 | |
| Proposals for altering friction in the new front axle and steering pivots. | 5th Nov 1926 | Box 67 \ 4 scan0204 | |
| Recommending immediate production of a reinforced Phantom Pendulum Lever due to breakage. | 11th Jun 1926 | Box 67 \ 4 scan0205 | |
| Experimental car incident caused by a steering lever failure. | 9th Nov 1926 | Box 67 \ 4 scan0206 | |
| Objections and compromises related to steering and suspension components like springs, axles, and tyres. | 11th Nov 1926 | Box 67 \ 4 scan0207 | |
| Design considerations for a steering tube ball end, focusing on safety, shocks, direction, and damping. | 11th Nov 1926 | Box 67 \ 4 scan0208 | |
| Steering issues on the 20 HP model, including complaints of 'joggles' and proposed solutions such as hydraulic dampers. | 12th Nov 1926 | Box 67 \ 4 scan0209 | |
| Steering wobble issues and potential solutions for the Phantom and 20 HP models. | 16th Nov 1926 | Box 67 \ 4 scan0210 | |
| Clarifying the production timeline for the Phantom steering stay. | 16th Nov 1926 | Box 67 \ 4 scan0211 | |
| Three proposals for modifications to the Phantom steering system. | 16th Nov 1926 | Box 67 \ 4 scan0212 | |
| Explaining a modified side steering tube for the C.2. series, following issues with a new lightened front axle. | 16th Nov 1926 | Box 67 \ 4 scan0213 | |
| Customer complaints and proposed remedies for faulty steering on early Phantom cars. | 16th Nov 1926 | Box 67 \ 4 scan0214 | |
| Continued memo detailing customer complaints regarding exhaust, throttle, and springing issues on specific car models. | 16th Nov 1926 | Box 67 \ 4 scan0215 | |
| How to improve the riding and steering qualities of the Phantom model. | 16th Nov 1926 | Box 67 \ 4 scan0216 | |
| Proposal for improvements to the Phantom's steering and lightened front axle for the C.2. Series. | 18th Nov 1926 | Box 67 \ 4 scan0217 | |
| Steering and suspension characteristics with a new lightened axle and balloon tyres. | 19th Nov 1926 | Box 67 \ 4 scan0218 | |
| Continued report discussing the relationship between non-skid tyre treads, tyre section size, and wheel wobble. | 20th Nov 1926 | Box 67 \ 4 scan0219 | |
| Solutions for various complaints regarding the Phantom model, including steering, springing, and governor issues. | 20th Nov 1926 | Box 67 \ 4 scan0220 | |
| From DA to Hs inquiring about the specific steering setup on Mr. Royce's Car 7-EX. | 20th Nov 1926 | Box 67 \ 4 scan0221 | |
| Standardisation sheet for the incorporation of a 'B' type gear lever on a chassis with 'C' steering. | 22th Nov 1926 | Box 67 \ 4 scan0222 | |
| Steering safety issues, specifically the 'taking charge' phenomenon on the 40/50 HP model. | 23th Nov 1926 | Box 67 \ 4 scan0223 | |
| Front braking and steering problems, suggesting a reduction in front braking proportion. | 23th Nov 1926 | Box 67 \ 4 scan0224 | |
| Suggestion to reduce front braking on cars due to weight distribution changes from moving spare wheels to the rear. | 24th Nov 1926 | Box 67 \ 4 scan0225 | |
| Conditional agreement for Phantom steering modifications, taking responsibility, and querying prior testing. | 24th Nov 1926 | Box 67 \ 4 scan0226 | |
| Urgent experiments on the Phantom steering gear, involving a lower gear ratio and whitemetal thickness. | 24th Nov 1926 | Box 67 \ 4 scan0227 | |
| Test report on steering 'taking charge' under various conditions on car 8-EX. | 25th Nov 1926 | Box 67 \ 4 scan0228 | |
| Test report detailing issues with steering, suspension, and servo performance. | 25th Nov 1926 | Box 67 \ 4 scan0229 | |
| Adjustments to front wheel braking proportions, servo effectiveness, and potential overbraking issues. | 25th Nov 1926 | Box 67 \ 4 scan0230 | |
| Tests for steering 'taking charge' with different tyre, spring, and tube configurations on car 8-EX. | 25th Nov 1926 | Box 67 \ 4 scan0231 | |
| Test report on steering and servo performance, detailing issues with servo 'jaggering' and observations on steering feel under various conditions. | 26th Nov 1926 | Box 67 \ 4 scan0232 | |
| Proposing an investigation into steering lubrication on the Phantom model compared to the Silver Ghost. | 26th Nov 1926 | Box 67 \ 4 scan0233 | |
| Modifications to address 'Phantom Complaints' regarding steering components. | 29th Nov 1926 | Box 67 \ 4 scan0234 | |
| Sending two levers to be fitted by Cricklewood to alter braking distribution on a selected car. | 12th Dec 1926 | Box 67 \ 4 scan0235 | |
| Proposal for a new front axle control system for a Phantom model, including suggested modifications and a testing method. | 4th Dec 1926 | Box 67 \ 4 scan0236 | |
| Solutions for Phantom steering issues, including strengthening a broken lever and adding a damper. | 12th Jun 1926 | Box 67 \ 4 scan0237 | |
| Standardisation proposal for incorporating a 'B' type gear lever on chassis with 'C' type steering. | 20th Nov 1926 | Box 67 \ 4 scan0238 | |
| Works order detailing the despatch of springs for chassis 7-EX to a customer in France. | 13th Dec 1926 | Box 67 \ 4 scan0239 | |
| The despatch of two springs for Mr. Royce's car to France. | 13th Dec 1926 | Box 67 \ 4 scan0240 | |
| Steering load specifications and spring details for model 7-EX. | 13th Dec 1926 | Box 67 \ 4 scan0241 | |
| Instructions on modifying spring load on cross steering balls to improve steering performance. | 13th Dec 1926 | Box 67 \ 4 scan0242 | |
| Graph detailing the load characteristics of cross steering tube springs. | 26th Nov 1926 | Box 67 \ 4 scan0243 | |
| Standardisation of weaker springs in the side steering tube to reduce steering shocks. | 26th Nov 1926 | Box 67 \ 4 scan0244 | |
| Apologising for sending unsuitable front brake levers and promising the correct parts for car 103-MG. | 31th Dec 1926 | Box 67 \ 4 scan0245 | |
| Steering wheel clearance and arrangements for the 10-EX car. | 1st Jan 1927 | Box 67 \ 4 scan0246 | |
| Standardisation sheet for reduced braking on the front and levers sent for testing. | 17th Jan 1927 | Box 67 \ 4 scan0247 | |
| Standardisation sheet for altering part G.73149's length to reduce front braking. | 9th Dec 1926 | Box 67 \ 4 scan0248 | |
| Bench and road tests investigating friction and torque in the steering pivot head. | 26th Jan 1928 | Box 67 \ 4 scan0249 | |
| Friction torque test results for a steering assembly under various load conditions. | 26th Jan 1928 | Box 67 \ 4 scan0250 | |
| Steering friction test results under various axle conditions. | 26th Jan 1928 | Box 67 \ 4 scan0251 | |
| Potential modifications to the steering system, specifically the friction and a hydraulic damper. | 31th Jan 1927 | Box 67 \ 4 scan0252 | |
| Tests on high-speed wobbles using heavy inner tubes and inertia dampers. | 31th Jan 1927 | Box 67 \ 4 scan0253 | |
| Investigation into steering geometry issues, specifically 'joggles' and 'twitching' on the 20 HP model compared to the 40/50 HP. | 2nd Feb 1927 | Box 67 \ 4 scan0254 | |
| Technical memorandum discussing steering tube spring movement, joggle, reversibility and potential geometry improvements. | 2nd Feb 1927 | Box 67 \ 4 scan0255 | |
| Graph and table comparing practical and theoretical data on steering wheel movement induced by front axle movement for various chassis models. | 2nd Feb 1927 | Box 67 \ 4 scan0256 | |
| Comparison of steering characteristics for different Phantom chassis series. | 2nd Feb 1927 | Box 67 \ 4 scan0257 | |
| Data table comparing steering characteristics for various configurations of the 20 HP chassis. | 2nd Feb 1927 | Box 67 \ 4 scan0258 | |
| Friction in the steering column and the need for tests due to variations in quality. | 2nd Feb 1927 | Box 67 \ 4 scan0259 | |
| Steering friction, analyzing its effects on driver feel, road shock, and component wear. | 7th Feb 1927 | Box 67 \ 4 scan0260 | |
| Report page comparing steering systems' resistance to 'joggles' across various experimental cars. | 7th Feb 1927 | Box 67 \ 4 scan0261 | |
| Steering tests on a 20 HP car, involving the fitting of a spring-loaded friction device to the steering column to eliminate wobbles. | 7th Feb 1927 | Box 67 \ 4 scan0262 | |
| Experiments with car components to address high-speed wobbles and 'joggles', including a load vs. angular movement graph. | 7th Feb 1927 | Box 67 \ 4 scan0263 | |
| Steering system friction, its distribution, and its advantages in absorbing road shock and improving steering feel. | 7th Feb 1927 | Box 67 \ 4 scan0264 | |
| List of disadvantages concerning low and high-speed wobbles and a reduction in self-centering. | 10th Feb 1927 | Box 67 \ 4 scan0265 | |
| Suggestions for immediate steering improvements and a separate experimental trial proposal. | 10th Feb 1927 | Box 67 \ 4 scan0266 | |
| Deviation from the original 10 lbs lever specification for a new axle, causing alarming stress. | 11th Feb 1927 | Box 67 \ 4 scan0267 | |
| Difficulties with 'Phantom Steering' and the extensive work being done on steering gears. | 2nd Feb 1927 | Box 67 \ 4 scan0268 | |
| Performance evaluation and report on the American Phantom chassis. | 2nd Feb 1927 | Box 67 \ 4 scan0269 | |
| Continued assessment of a vehicle's features, including the instrument board, body, and chassis lubrication system. | 16th Feb 1927 | Box 67 \ 4 scan0270 | |
| Proposal for a variable hydraulic shock damper system, controllable either manually by the driver or automatically. | 16th Feb 1927 | Box 67 \ 4 scan0271 | |
| The effects of adding friction to the steering columns of the 40/50 HP and 20 HP car models. | 1st Feb 1927 | Box 67 \ 4 scan0272 | |
| Disappointing steering performance and road shocks during the Paris trials of chassis 107-TC Saloon. | 21th Feb 1927 | Box 67 \ 4 scan0273 | |
| From 'R' reviewing proposed improvements regarding worm gear pitch, bearings, and steering components on cards 'C' and 'D'. | 12th Mar 1927 | Box 67 \ 4 scan0274 | |
| Supply of a car in London fitted with Phantom 'D' Steering. | 15th Mar 1927 | Box 67 \ 4 scan0275 | |
| Fitting of a steering system to a Sales car. | 21th Mar 1927 | Box 67 \ 4 scan0276 | |
| Outlining a list of potential improvements for vehicle steering systems. | 22th Mar 1927 | Box 67 \ 4 scan0277 | |
| Continued memo listing favoured and avoided design elements for a vehicle's steering system. | 22th Mar 1927 | Box 67 \ 4 scan0278 | |
| | | | |
