| Description | Date | Identifier | |
| The delivery and engine alterations for the 14-EX car. | 10th May 1928 | Box 65a \ 1 scan0356 | |
| Recommendations for rebuilding the 15-EX experimental car, detailing chassis and component options. | 11th May 1928 | Box 65a \ 1 scan0357 | |
| The re-building of a chassis pending an insurance claim settlement and its subsequent sale. | 14th May 1928 | Box 65a \ 1 scan0358 | |
| Confidential memo outlining the policy on the development and testing of a high-speed 'SS' chassis. | 17th May 1928 | Box 65a \ 1 scan0359 | |
| Design improvements for the SS. PHANTOM, including new spring levers, steering damping, and engine components. | 7th May 1928 | Box 65a \ 1 scan0360 | |
| The production and specifications of the 'SS' chassis. | 18th May 1928 | Box 65a \ 1 scan0361 | |
| Conflicting feedback on the 14-EX car and requesting its return to London for further testing. | 18th May 1928 | Box 65a \ 1 scan0362 | |
| Misunderstanding over testing the 14-EX car and requesting a list of test points. | 21th May 1928 | Box 65a \ 1 scan0363 | |
| Instructions for building chassis, engine development, and arranging cars for high-speed and traffic testing. | 1st May 1928 | Box 65a \ 1 scan0364 | |
| Mr. Royce's satisfaction with the steering, springing, and engine features of the 14-EX car. | 21th May 1928 | Box 65a \ 1 scan0365 | |
| From BJ to Hs discussing the testing parameters for the 14-EX Car, specifically its steering, springing, and engine. | 22th May 1928 | Box 65a \ 1 scan0366 | |
| Steering compromises and listing other new features for the 14-EX car. | 22th May 1928 | Box 65a \ 1 scan0367 | |
| New standard parts for the 8-EX car and requesting feedback on its engine, steering, and a novel spotlight feature. | 24th May 1928 | Box 65a \ 1 scan0368 | |
| Test report on engine acceleration, vibration and road spring performance. | 24th May 1928 | Box 65a \ 1 scan0369 | |
| Steering characteristics, sponginess, and high-speed handling on French roads. | 24th May 1928 | Box 65a \ 1 scan0370 | |
| Trial of experimental cars (14-EX, 8-EX, 70-EF) with standard steering. | 24th May 1928 | Box 65a \ 1 scan0371 | |
| Allocation of either the 14-EX or 8-EX experimental car for Lord Wargrave. | 30th May 1928 | Box 65a \ 1 scan0372 | |
| Providing feedback on a car's design features following a test by sales officials. | 30th May 1928 | Box 65a \ 1 scan0373 | |
| Design changes for the 14-EX car, including starter button placement, controls, and frame height. | 31th May 1928 | Box 65a \ 1 scan0374 | |
| Expressing urgency about delays in engine and chassis completion due to missing instructions and parts. | 1st Jun 1928 | Box 65a \ 1 scan0375 | |
| Confirming the completion date for 'SS' patterns and highlighting the intense workload and strain on the pattern makers. | 1st Jun 1928 | Box 65a \ 1 scan0376 | |
| Comparing the performance and specifications of car models 14-EX and 8-EX, based on a recent meeting. | 1st Jun 1928 | Box 65a \ 1 scan0377 | |
| Experiments with springs, shock absorbers, steering, gear ratios, and seating for car testing. | 1st Jun 1928 | Box 65a \ 1 scan0378 | |
| Confirming a conversation about the completion date for 'SS' patterns and the strain this is putting on the workforce. | 1st Jun 1928 | Box 65a \ 1 scan0379 | |
| Agreeing to the use of the 8-EX car for Lord Wargrave's trip and requesting its return for modifications. | 1st Jun 1928 | Box 65a \ 1 scan0380 | |
| Comparing the performance, springing, and damping of the 14-EX and 8-EX cars. | 1st Jun 1928 | Box 65a \ 1 scan0381 | |
| Confidential memo discussing progress on new springs and arrangements for the 14-EX and 8-EX cars. | 4th Jun 1928 | Box 65a \ 1 scan0382 | |
| Test report on the 8-EX car, detailing its engine performance, clutch, and steering. | 4th Jun 1928 | Box 65a \ 1 scan0383 | |
| Page 2 of a report discussing steering feel, suspension performance, and potential designs for a headlight changeover switch. | 4th Jun 1928 | Box 65a \ 1 scan0384 | |
| Testing and known issues of the 8-EX car, including tappet noise and exhaust rattle. | 24th May 1928 | Box 65a \ 1 scan0385 | |
| New standard parts for the F.2.B. series, tested on the 8-EX car, and seeking feedback. | 24th May 1928 | Box 65a \ 1 scan0386 | |
| Progress report on various chassis and body components for the 'F' Section, dealt with by 'Camacha'. | 5th Jun 1928 | Box 65a \ 1 scan0387 | |
| Progress report on vehicle component development, sections F and G. | 5th Jun 1928 | Box 65a \ 1 scan0388 | |
| Status update on the design and construction of various vehicle components under 'E' SECTION. | 6th Jun 1928 | Box 65a \ 1 scan0389 | |
| Hm. to Hs. regarding the engine for Chassis 15-EX and its alteration to the F.2.B. specification. | 6th Jun 1928 | Box 65a \ 1 scan0390 | |
| Power output and compression ratios for the F.2.B. series engine. | 7th Jun 1928 | Box 65a \ 1 scan0391 | |
| Requesting a sketch of the steering wheel and controls arrangement for the 14-EX car. | 9th Jun 1928 | Box 65a \ 1 scan0392 | |
| Confirming the fitment of an 'E' type steering on chassis 12-EX and the necessary alteration of the front seat. | 21th Jun 1928 | Box 65a \ 1 scan0393 | |
| Confirming instructions have been issued for 'E' steering to be fitted to a 12-EX car. | 21th Jun 1928 | Box 65a \ 1 scan0394 | |
| Using a sports car for the Hendon Pageant, mentioning arrangements for the attending party. | 22th Jun 1928 | Box 65a \ 1 scan0395 | |
| Arranging the swap of a Sports car for a London open trials car for use at Hendon. | 25th Jun 1928 | Box 65a \ 1 scan0396 | |
| Coordinating the use of the 14-EX car for 'R' to attend a pageant at Hendon. | 25th Jun 1928 | Box 65a \ 1 scan0397 | |
| Arranging to borrow an open car for a visit to the Hendon Air Pageant. | 27th Jun 1928 | Box 65a \ 1 scan0398 | |
| Alterations to car 14-EX, including seat modifications and fitting a hypoid bevel rear axle. | 28th Jun 1928 | Box 65a \ 1 scan0399 | |
| Chassis centre-point lubrication and frame torsional stiffness. | 29th Jun 1928 | Box 65a \ 1 scan0400 | |
| Continued technical discussion on frame stiffening, brakes, cadmium plated springs, and shock dampers. | 29th Jun 1928 | Box 65a \ 1 scan0401 | |
| Abandonment of water-heated throttles, steering geometry, and suspension damping adjustments. | 29th Jun 1928 | Box 65a \ 1 scan0402 | |
| Discussion about design considerations related to fitting double Hartford shock absorbers. | 29th Jun 1928 | Box 65a \ 1 scan0403 | |
| And a diagram analyzing a Cadillac engine drawing. | 6th Jul 1928 | Box 65a \ 2 scan0001 | |
| List of engine specifications and design features, with comparisons to a 'Ph III' model. | 6th Jul 1928 | Box 65a \ 2 scan0002 | |
| Page of handwritten notes detailing specifications for a camshaft, oil pump, crankshaft, and bearings. | 6th Jul 1928 | Box 65a \ 2 scan0003 | |
| Engine component design including induction, wiring, valves, and oil sealing. | 6th Jul 1928 | Box 65a \ 2 scan0004 | |
| Test drive report for the 14-EX model, detailing issues with the engine, seats, handling, and instrument layout. | 6th Jul 1928 | Box 65a \ 2 scan0005 | |
| Comparative road test of car 14-EX, focusing on suspension and ride comfort. | 6th Jul 1928 | Box 65a \ 2 scan0006 | |
| Test report on car 14-MX, detailing observations on springing, seat cushions, and axle gear modifications. | 5th Jul 1928 | Box 65a \ 2 scan0007 | |
| Criticisms and improvements to a car, covering engine roar, seating, steering, and chassis stiffness. | 9th Jul 1928 | Box 65a \ 2 scan0008 | |
| Instructing a stop to work on 'B' steering for the Phantom G2B series and to reduce car height. | 13th Jul 1928 | Box 65a \ 2 scan0009 | |
| Arrangement to send a dummy chassis with a Jarvis sports body to Derby to be fitted to a 17-EX chassis. | 26th Jul 1928 | Box 65a \ 2 scan0010 | |
| Criticism of a car, including engine performance, steering, and proposed alterations to the chassis and body. | 11th Jul 1928 | Box 65a \ 2 scan0011 | |
| Chasing a reply to previous memos discussed at a C.S.C. meeting. | 11th Jul 1928 | Box 65a \ 2 scan0012 | |
| Potential sale of the 16.EX. sports car with a Barker body, including handwritten notes on required modifications. | 25th Jul 1928 | Box 65a \ 2 scan0013 | |
| Modifications required for a 16-EX Sports car with a Barker body, with an estimated completion time. | 26th Jul 1928 | Box 65a \ 2 scan0014 | |
| Listing four experiments regarding vehicle components and a chronograph. | 15th Aug 1928 | Box 65a \ 2 scan0015 | |
| Telegram received by telephone from Honeyman in London concerning the disposal of '16 EX'. | 21th Aug 1925 | Box 65a \ 2 scan0016 | |
| Chasing a reply to a previous memo concerning the 40/50 HP Car 14-EX. | 21th Aug 1928 | Box 65a \ 2 scan0017 | |
| Declining a request for sketches of the instrument board for car 14-EX, suggesting to contact the body builder Hoopers instead. | 22th Aug 1928 | Box 65a \ 2 scan0018 | |
| Non-standardized features of the experimental 16-EX car upon its sale and handover to the Test Department. | 22th Mar 1926 | Box 65a \ 2 scan0019 | |
| Continued memo regarding the testing and parts of a sports car before despatch. | 27th Aug 1928 | Box 65a \ 2 scan0020 | |
| Test run report for Super Sports Engine SS-3, detailing a seized dynamo drive bush and proposed solutions. | 27th Aug 1928 | Box 65a \ 2 scan0021 | |
| Strictly secret covering memo regarding a 'Super Sports Car'. | 27th Aug 1928 | Box 65a \ 2 scan0022 | |
| The secrecy and handling of drawings for a 'Super Sports Car' project. | 27th Aug 1928 | Box 65a \ 2 scan0023 | |
| Requesting permission to take L.H.S.S. chassis schemes and drawings to Springfield to expedite development. | 21th Aug 1928 | Box 65a \ 2 scan0024 | |
| Central gear change mechanism for American chassis. | 20th Aug 1928 | Box 65a \ 2 scan0025 | |
| Parts awaiting design, a proposal for a large chauffeur-driven body, and radiator and dash appearance. | 28th Aug 1928 | Box 65a \ 2 scan0026 | |
| The full load power curve test results for the 'SS' engine and comparing its performance to the Phantom engine. | 8th Aug 1928 | Box 65a \ 2 scan0027 | |
| Engine testing, detailing carburetter performance, induction system issues, power loss, and component faults. | 8th Aug 1928 | Box 65a \ 2 scan0028 | |
| Push rod oiling issue, the proposed fix, and the weight of the 'SS' engine compared to the Phantom. | 28th Aug 1928 | Box 65a \ 2 scan0029 | |
| Power curve graph for the 'Super Sports' Phantom engine, comparing its performance against other variants. | 28th Aug 1928 | Box 65a \ 2 scan0030 | |
| Request to obtain a registration number and licence for a Phantom chassis. | 27th Aug 1928 | Box 65a \ 2 scan0031 | |
| Confirming the supply of special parts 1 to 6 for the 16-EX car model. | 30th Aug 1928 | Box 65a \ 2 scan0032 | |
| From Hs. to C. confirming that special items 1 to 6 can be supplied to customers. | 30th Aug 1928 | Box 65a \ 2 scan0033 | |
| The dispatch of a dummy chassis by railway. | 8th Oct 1928 | Box 65a \ 2 scan0034 | |
| Testing and movement of the 12-EX car in relation to its 'E' steering. | 11th Oct 1928 | Box 65a \ 2 scan0035 | |
| The sale status of the 17-EX Sports Car after a Jarvis body was fitted. | 4th Sep 1928 | Box 65a \ 2 scan0036 | |
| The running conditions, failures, and modifications made to a Super Sports Engine, No. 55-3. | 5th Sep 1928 | Box 65a \ 2 scan0037 | |
| Technical memo detailing engine testing results, including vibration, vacuum pump, valve timing, and oiling system issues. | 5th Sep 1928 | Box 65a \ 2 scan0038 | |
| Blueprint detailing the oil grooves in a dynamo drive bush for a Super Sports Engine. | 5th Sep 1928 | Box 65a \ 2 scan0039 | |
| Drawing of oil drain grooves in a governor housing for a Super Sports Engine. | 5th Sep 1928 | Box 65a \ 2 scan0040 | |
| Sketch showing the arrangement of an oil scoop for a super sports engine. | 5th Sep 1928 | Box 65a \ 2 scan0041 | |
| Blueprint detailing the dimensions and specifications for a Modified Rocker Shaft for a Super-Sports Engine. | 5th Sep 1928 | Box 65a \ 2 scan0042 | |
| Performance graph showing the power curve, oil pressures, and induction pipe depression for a Super Sports engine. | 4th Sep 1928 | Box 65a \ 2 scan0043 | |
| Wheel and tyre specifications for the first 'SS' model to achieve a lower car height. | 6th Sep 1928 | Box 65a \ 2 scan0044 | |
| Design and procurement of bodies for EAC.10 cars and requesting experimental chassis numbers. | 10th Sep 1928 | Box 65a \ 2 scan0045 | |
| Cover memo regarding EAC.10 first cars, referencing an attached copy and blueprint. | 12th Sep 1928 | Box 65a \ 2 scan0046 | |
| The design and preparation of bodies for two EAC.10 cars. | 10th Sep 1928 | Box 65a \ 2 scan0047 | |
| Blueprint drawing showing the side elevation of a Landaulette car body. | 12th Sep 1928 | Box 65a \ 2 scan0048 | |
| Chassis numbers and the provision of a dummy frame for coachbuilders for the first three EAC.10 cars. | 2nd Sep 1928 | Box 65a \ 2 scan0049 | |
| On the 'SS' engine unit, detailing tests on the oiling system's indicator accuracy and the unit's weight savings compared to the Phantom engine. | 13th Sep 1928 | Box 65a \ 2 scan0050 | |
| Graph of oil flow rates in pints per minute versus engine RPM for a Super-Sports engine at 60°C. | 10th Sep 1928 | Box 65a \ 2 scan0051 | |
| Graph of oil pressures versus engine RPM for the Super Sports Engine. | 10th Sep 1928 | Box 65a \ 2 scan0052 | |
| | | | |
