| Description | Date | Identifier | |
| Car testing from France, detailing issues with steering, suspension, a telegauge, and brakes. | 24th Apr 1929 | Box 11 \ 2 02-page212 | |
| Series of brake system tests involving different levers and linings. | 25th Apr 1929 | Box 11 \ 2 02-page213 | |
| Instructions for testing different brake servo linings and cams, and a request for steering performance reports. | 25th Apr 1929 | Box 11 \ 2 02-page214 | |
| Request for testing pivot lean and toe-in on a new axle, and for damper load recommendations. | 25th Apr 1929 | Box 11 \ 2 02-page215 | |
| The results of steering and damper tests under various load conditions. | 25th Apr 1929 | Box 11 \ 2 02-page216 | |
| Steering and tyre performance tests, detailing the effects of dampers and tyre wear on ride quality. | 26th Apr 1929 | Box 11 \ 2 02-page217 | |
| Steering performance after adjustments to the front shock dampers. | 28th Apr 1929 | Box 11 \ 2 02-page218 | |
| Delays, customs issues, incorrect parts for front brakes, and ongoing work on the servo and steering. | 28th Apr 1929 | Box 11 \ 2 02-page219 | |
| Typed letter from G.W.H. discussing steering spring settings, lengths, and test results for joggles and jellying. | 29th Apr 1929 | Box 11 \ 2 02-page220 | |
| Query regarding a report on hydraulic dampers, seeking clarification on dynamic restrictions and a history of starter motor failures. | 29th Apr 1929 | Box 11 \ 2 02-page221 | |
| Ongoing testing and development of S.S. Hydraulic Dampers. | 29th Apr 1929 | Box 11 \ 2 02-page222 | |
| Steering and suspension tests, including pivot lean, damper loadings, and buffer clearances. | 25th Apr 1929 | Box 11 \ 2 02-page223 | |
| Steering and tyre performance tests conducted under various conditions. | 26th Apr 1929 | Box 11 \ 2 02-page224 | |
| Testing different shock damper settings and their effect on ride quality and steering. | 30th Apr 1929 | Box 11 \ 2 02-page225 | |
| Car testing concerning braking adjustments, cross steering tube modifications, and fitting new servo linings. | 30th Apr 1929 | Box 11 \ 2 02-page226 | |
| Telegram from Hancock in Chateauroux to Hives Roycar in Derby about travel plans. | 11th May 1929 | Box 11 \ 2 02-page227 | |
| Work on the servo, bijurs, and cross steering tube, including planned tests. | 1st May 1929 | Box 11 \ 2 02-page228 | |
| The specifications and setup for springs within a cross steering tube. | 1st May 1929 | Box 11 \ 2 02-page229 | |
| Test report on steering and brake modifications and performance. | 2nd May 1929 | Box 11 \ 2 02-page230 | |
| Letter discussing radiator complaints due to over-lubrication and requesting further steering tests with different tyre pressures and types. | 1st May 1929 | Box 11 \ 2 02-page231 | |
| Technical letter discussing brake system modifications and seeking an opinion on fitting altered levers to reduce front braking. | 3rd May 1929 | Box 11 \ 2 02-page232 | |
| From G.W.H. regarding dissatisfaction with front damping and upcoming tests on the cross steering tube and lean of pivots. | 3rd May 1929 | Box 11 \ 2 02-page233 | |
| Test report detailing the results of steering and suspension adjustments on a vehicle, focusing on critical speed and handling characteristics. | 3rd May 1929 | Box 11 \ 2 02-page234 | |
| Steering tests concerning load consistency on a new cross steering tube. | 3rd May 1929 | Box 11 \ 2 02-page235 | |
| Steering test with alterations to the lean of pivots. | 4th May 1929 | Box 11 \ 2 02-page236 | |
| Series of dated reports detailing the ongoing failure and troubleshooting of a starter motor fitted to 22 Ex. | 5th May 1929 | Box 11 \ 2 02-page237 | |
| Component damage from a fire caused by an untraceable electrical fault on starter motor 18 EX. | 5th May 1929 | Box 11 \ 2 02-page238 | |
| Steering tests, detailing issues with front dampers, shocks, and ride quality at different speeds. | 5th May 1929 | Box 11 \ 2 02-page239 | |
| Page two of a memo discussing the valve settings and rebound load preferences for front dampers. | 6th May 1929 | Box 11 \ 2 02-page240 | |
| Telegram regarding a damaged flywheel ring preventing starter motor fitment. | 6th May 1929 | Box 11 \ 2 02-page241 | |
| Letter discussing steering settings, tyre performance, and a damaged starter motor on a test car in France. | 6th May 1929 | Box 11 \ 2 02-page242 | |
| Braking tests and requesting details on cross steering tube springs. | 6th May 1929 | Box 11 \ 2 02-page243 | |
| Test report comparing the effects of different tyre types and pressures on vehicle handling and ride quality. | 6th May 1929 | Box 11 \ 2 02-page244 | |
| Vehicle performance issues including braking, starter motor, and ride quality. | 7th May 1929 | Box 11 \ 2 02-page245 | |
| Typed memo from G.W.H. regarding the fitting of new brake shoes and car licensing. | 7th May 1929 | Box 11 \ 2 02-page246 | |
| Alarming situation with bent guides for the rear brakes discovered during the fitting of new brake shoes. | 7th May 1929 | Box 11 \ 2 02-page247 | |
| Diagram illustrating the guides for top and bottom shoes. | 10th May 1929 | Box 11 \ 2 02-page248 | |
| The performance of newly fitted brake shoes after a 400-mile run in France. | 10th May 1929 | Box 11 \ 2 02-page249 | |
| Telegram confirming arrival in Dover, addressed to Hives at Roycar, Derby. | 25th Aug 1914 | Box 11 \ 2 02-page250 | |
| Cover letter for a general report on the 10,000 miles test of chassis 22-EX 'C' Type in France. | 17th May 1929 | Box 11 \ 2 02-page251 | |
| The 10,000-mile test in France for chassis 22 EX 'C' type fitted with a Hooper closed landaulette body. | 2nd May 1929 | Box 11 \ 2 02-page252 | |
| Inspection report detailing issues and observations on various engine components. | 2nd May 1929 | Box 11 \ 2 02-page253 | |
| Test report on various engine components including gears, pumps, carburettor, and exhaust fittings. | 2nd May 1929 | Box 11 \ 2 02-page254 | |
| The performance and issues observed for vehicle components such as the exhaust, radiator, bonnet catches, and oil pump. | 2nd May 1929 | Box 11 \ 2 02-page255 | |
| Test report detailing the performance and faults of various vehicle components. | 1st Feb 1941 | Box 11 \ 2 02-page256 | |
| Condition and performance of various vehicle components after testing. | 1st Feb 1941 | Box 11 \ 2 02-page257 | |
| The performance and issues of various vehicle components including brakes, suspension, and chassis elements. | 1st Feb 1941 | Box 11 \ 2 02-page258 | |
| Test report detailing issues with various vehicle components including the filter, oil system, and bodywork. | 2nd May 1929 | Box 11 \ 2 02-page259 | |
| Failures and remedies for chassis 22-EX after a 10,000-mile test. | 2nd May 1929 | Box 11 \ 2 02-page260 | |
| Faults and proposed modifications for various vehicle components. | 27th May 1929 | Box 11 \ 2 02-page261 | |
| 10,000-mile test report for chassis 22-EX detailing issues with steering, propeller shaft, and engine unit no. 15. | 27th May 1929 | Box 11 \ 2 02-page262 | |
| Performance of engine gears, a water pump, and exhaust fittings. | 27th May 1929 | Box 11 \ 2 02-page263 | |
| Issues and resolutions for an exhaust cut-out, fan, and gearbox. | 27th May 1929 | Box 11 \ 2 02-page264 | |
| Technical notes on the performance of a flywheel, clutch, propeller shaft, and front axle brakes. | 1st Nov 1934 | Box 11 \ 2 02-page265 | |
| The performance and issues with steering and suspension components after a 6,000-mile run. | 1st Nov 1934 | Box 11 \ 2 02-page266 | |
| Issues and remarks on vehicle components including dampers, a spare wheel carrier, and a starter motor. | 1st Nov 1934 | Box 11 \ 2 02-page267 | |
| Component failures including coil mis-fires, a stiff switch, a leaking filter, and a lubrication system fault. | 1st Nov 1934 | Box 11 \ 2 02-page268 | |
| Remarks recommending new sizes and a fix for oil pump leaks using a leather washer. | 28th Jun 1929 | Box 11 \ 2 02-page269 | |
| Completion of tests on a 20 HP car and arranging experimental tests on a 21-EX car in France. | 28th Jun 1929 | Box 11 \ 2 02-page270 | |
| Arranging the discreet fitting of a standard Phantom front axle to the 21-EX experimental car. | 29th Jun 1929 | Box 11 \ 2 02-page271 | |
| Road testing and modifications to the 21-EX vehicle, focusing on axle and steering performance. | 13th Jul 1929 | Box 11 \ 2 02-page272 | |
| Cooling system tests, S.S. axle friction, and axle control dampers. | 14th Jul 1929 | Box 11 \ 2 02-page273 | |
| Steering and tyre performance tests on various models, including pivot lean and steering tube load analysis. | 14th Jul 1929 | Box 11 \ 2 02-page274 | |
| Test report discussing car performance including steering, cooling, suspension, and potential modifications. | 14th Jul 1929 | Box 11 \ 2 02-page275 | |
| Resolving piston knocks and servo squeaks on car 21-EX. | 15th Jul 1929 | Box 11 \ 2 02-page276 | |
| The performance testing of vehicle 21-EX, detailing issues with its steering, petrol gauge, and windscreen. | 15th Jul 1929 | Box 11 \ 2 02-page277 | |
| Shock absorber tests comparing ride quality with increased damper loads. | 16th Jul 1929 | Box 11 \ 2 02-page278 | |
| Tests for cooling fan efficiency and steering issues related to tyre wear. | 18th Jul 1929 | Box 11 \ 2 02-page279 | |
| Hand-drawn graph plotting circulation in gallons per minute against engine revolutions per minute (RPM). | 17th Jul 1929 | Box 11 \ 2 02-page280 | |
| Axle test results, which were inconclusive due to crosswinds, and subsequent temperature tests. | 17th Jul 1929 | Box 11 \ 2 02-page281 | |
| Typed report on vehicle testing after fitting an S.S. axle, covering steering performance, stability, and issues with the fuel telegauge. | 19th Jul 1929 | Box 11 \ 2 02-page282 | |
| List of eight tests to be performed on components including the axle, suspension, engine, and radiator. | 20th Jul 1929 | Box 11 \ 2 02-page283 | |
| Optimal settings and design considerations for slipper wheels to achieve the best performance. | 20th Jul 1929 | Box 11 \ 2 02-page284 | |
| Road tests and maintenance concerning exhaust boom, rear springs, shock damper, and steering adjustments. | 21th Jul 1929 | Box 11 \ 2 02-page285 | |
| The status of rear shock damper glands and a telegauge reading. | 23th Jul 1929 | Box 11 \ 2 02-page286 | |
| Tests for exhaust boom and steering, detailing faults found in the front axle, pivot pins and lubrication system. | 23th Jul 1929 | Box 11 \ 2 02-page287 | |
| Telegram received, telegauges for Mr. Parsons, and findings from an inspection of shock dampers on car 21-EX. | 24th Jul 1929 | Box 11 \ 2 02-page288 | |
| Steering jerkiness caused by cross steering tube ball pads and the fitting of a new telegauge unit. | 24th Jul 1929 | Box 11 \ 2 02-page289 | |
| Letter from G.W.H. disputing a Test Department report about a pump leak. | 24th Jul 1929 | Box 11 \ 2 02-page290 | |
| Placeholder document with the word 'Drawing' and a large X. | 13th Jul 1930 | Box 11 \ 3 03-page001 | |
| Graph plotting water and air temperature readings taken every 50 miles over several days in July 1930. | 13th Jul 1930 | Box 11 \ 3 03-page002 | |
| Cover page for a 10,000-mile test report on S.S. (23-EX) in France, also referencing the first test report on 24-EX. | 13th Jul 1930 | Box 11 \ 3 03-page003 | |
| List of modifications and experimental parts for Chassis 23-EX during a 10,000 miles trial. | 15th Oct 1929 | Box 11 \ 3 03-page004 | |
| Outlining a list of proposed improved parts for the Phantom II model to be tested. | 15th Oct 1929 | Box 11 \ 3 03-page005 | |
| Potential design modifications for spare wheel carriers, radiator filters, central lubrication, and radiator shapes. | 15th Oct 1929 | Box 11 \ 3 03-page006 | |
| Customer complaints regarding noisy shock absorbers and potential solutions. | 29th Nov 1929 | Box 11 \ 3 03-page007 | |
| Modifications to be fitted to a car for a 10,000-mile test. | 29th Nov 1929 | Box 11 \ 3 03-page008 | |
| List of experimental parts requiring testing during a 10,000-mile trial on the Phantom II. | 29th Nov 1929 | Box 11 \ 3 03-page009 | |
| Requesting the production of four radiator inlet flanges for the 23-EX car. | 29th Nov 1929 | Box 11 \ 3 03-page010 | |
| List of modifications and improvements for a 10,000-mile test car. | 3rd Dec 1929 | Box 11 \ 3 03-page011 | |
| List of required engine components for the 10,000 miles test on the 23-EX car. | 3rd Dec 1929 | Box 11 \ 3 03-page012 | |
| List of modifications and features for the vehicle chassis. | 3rd Dec 1929 | Box 11 \ 3 03-page013 | |
| Upcoming 10,000-mile test of a Phantom II car and the modifications to be tested. | 12th Dec 1929 | Box 11 \ 3 03-page014 | |
| List of parts being fitted to a Phantom II test car for a 10,000-mile test. | 14th Dec 1929 | Box 11 \ 3 03-page015 | |
| Progress report on a vehicle build, detailing outstanding parts and an expected test start date. | 17th Dec 1929 | Box 11 \ 3 03-page016 | |
| Radiator filter being built into a radiator with automatic shutter control for car 23-EX. | 17th Dec 1929 | Box 11 \ 3 03-page017 | |
| Requesting to hold 32 x 6.75 Dunlop Tyres for a 10,000 miles test. | 18th Dec 1929 | Box 11 \ 3 03-page018 | |
| Outlining desired car features following a 10,000-mile test, including under-bonnet tool storage, a reverse light, and standard bumpers. | 23th Dec 1929 | Box 11 \ 3 03-page019 | |
| Proposal to test Nitro Alloy crankshafts in the Phantom II and 20 HP models to reduce bearing wear. | 27th Dec 1929 | Box 11 \ 3 03-page020 | |
| 10,000 miles test, specifically the reversing light switch, starting handle, and bumpers. | 31th Dec 1929 | Box 11 \ 3 03-page021 | |
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