| Description | Date | Identifier | |
| Photograph of two X-shaped cast metal brackets bolted to vertical members. | 22th May 1935 | Box 94 \ 4 scan0046 | |
| Diagram of a test rig with dimensional measurements. | 21th May 1935 | Box 94 \ 4 scan0047 | |
| Table of results from frame cross rigidity tests on four different designs, including a 'Spectre' model. | 21th May 1935 | Box 94 \ 4 scan0048 | |
| Graph comparing frame cross deflections under torque and load for four different designs. | 1st May 1935 | Box 94 \ 4 scan0049 | |
| Blueprint showing models and sections of a frame structure at 1/8 scale. | 22th May 1936 | Box 94 \ 4 scan0050 | |
| Final arrangement and modifications to the Spectre frame side member. | 30th May 1935 | Box 94 \ 4 scan0051 | |
| Confirming modifications to the Spectre frame cross web. | 30th May 1935 | Box 94 \ 4 scan0052 | |
| Test report on the points of deflection for a Spectre Frame under varying torque. | 31th May 1935 | Box 94 \ 4 scan0053 | |
| Investigation and fabrication of different model frame crosses. | 1st Jun 1936 | Box 94 \ 4 scan0054 | |
| Blueprint showing four different designs for model frame crosses. | 3rd Jun 1935 | Box 94 \ 4 scan0055 | |
| Test results for Spectre frame distortion under load without dashboard and diamond bracing. | 3rd Jun 1935 | Box 94 \ 4 scan0056 | |
| Frame cross rigidity, comparing the Spectre frame to the Cadillac and mentioning a new Bentley frame. | 3rd Jun 1935 | Box 94 \ 4 scan0057 | |
| Addition of a stiffener to the Spectre 3rd cross member to prevent distortion. | 6th Jun 1935 | Box 94 \ 4 scan0058 | |
| Modifications to Spectre and Bentley frames for further torsion and rigidity testing. | 12th Jun 1935 | Box 94 \ 4 scan0059 | |
| Stress test results for a Spectre Frame with measurements at various points under increasing loads. | 19th Jul 1935 | Box 94 \ 4 scan0060 | |
| Note detailing the suspension method for a chassis frame on a trestle. | 12th Aug 1935 | Box 94 \ 4 scan0061 | |
| Secret memo discussing the need for lateral frame stiffening for the 'Spectre Frame' model. | 12th Aug 1935 | Box 94 \ 4 scan0062 | |
| Secret memo regarding a frame stiffener scheme for the Phantom III, to improve lateral stability. | 14th Sep 1935 | Box 94 \ 4 scan0063 | |
| Research into frame stiffness requirements, comparing the performance of Cadillac, Spectre, and Bentley frames. | 2nd Nov 1935 | Box 94 \ 4 scan0064 | |
| Table comparing the stiffness of various car frames and complete cars. | 2nd Nov 1935 | Box 94 \ 4 scan0065 | |
| Modification to the Phantom III frame stiffener to allow better access for a box spanner. | 23th Dec 1935 | Box 94 \ 4 scan0066 | |
| Modifications to the Phantom III chassis frame, including the elimination of a steel tubular distance piece. | 28th Dec 1935 | Box 94 \ 4 scan0067 | |
| Aluminium distance pieces in the frame of a Phantom III. | 13th Jan 1936 | Box 94 \ 4 scan0068 | |
| Requesting a report on Phantom III Transverse Chassis Stays to stiffen the frame against lateral vibration. | 3rd Jan 1936 | Box 94 \ 4 scan0069 | |
| Attempts to reproduce sideways shake on a Phantom III bumper chassis fitted with transverse stays. | 8th Jan 1936 | Box 94 \ 4 scan0070 | |
| Modifications to the Phantom III Aluminium Frame Distance Pieces. | 16th Jan 1936 | Box 94 \ 4 scan0071 | |
| Technical instructions for modifying distance pieces by introducing a counter bore. | 20th Jan 1936 | Box 94 \ 4 scan0072 | |
| Fitting of Ph.III diagonal sheet metal frame stays to the first production cars. | 20th Jan 1936 | Box 94 \ 4 scan0073 | |
| Urgent inclusion of diagonal sheet metal stays in the Phantom III chassis frame. | 17th Jan 1936 | Box 94 \ 4 scan0074 | |
| Modifications to the Phantom III diagonal stays in the frame to address clearance issues with the silencer. | 28th Jan 1936 | Box 94 \ 4 scan0075 | |
| Modifications to the Phantom III frame diagonal stays and exhaust system due to clearance issues with the main silencer. | 28th Jan 1936 | Box 94 \ 4 scan0076 | |
| Frame failure observed on the No.1 Bumper Chassis (Spectre III) during bumper testing. | 4th Feb 1936 | Box 94 \ 4 scan0077 | |
| Photograph showing the underside of a vehicle's front wheel, suspension, and chassis assembly. | 3rd Mar 1936 | Box 94 \ 4 scan0078 | |
| Modifications to the engine to frame stay for the Phantom III, following a failure during a bump test. | 3rd Mar 1936 | Box 94 \ 4 scan0079 | |
| Modifications to the transverse frame braces for the Phantom III long wheelbase chassis. | 5th Feb 1936 | Box 94 \ 4 scan0080 | |
| Comparison of frame specifications between a General Motors 1937 frame and a Phantom III frame. | 19th Aug 1936 | Box 94 \ 4 scan0081 | |
| The production of Phantom III Sidemembers in a thinner gauge material, seeking authorisation to proceed. | 7th Oct 1936 | Box 94 \ 4 scan0082 | |
| Order to be placed with Messrs. John Thompsons for Phantom III frame and fitting parts. | 8th Oct 1936 | Box 94 \ 4 scan0083 | |
| Telegram to Motoframe, Wolverhampton, enquiring about a delivery promise for a pair of thin side members. | 14th Oct 1936 | Box 94 \ 4 scan0084 | |
| Letter from John Thompson Motor Pressings Ltd explaining a delivery delay for sidemembers due to a supplier issue. | 14th Oct 1936 | Box 94 \ 4 scan0085 | |
| Notification regarding the receipt of Sidemember Channels and Plates for a Phantom III, and advising that cruciform parts are still outstanding. | 2nd Nov 1936 | Box 94 \ 4 scan0086 | |
| Update on the receipt of Sidemember Channels and Plates for the Phantom III, noting that cruciform parts are still outstanding. | 2nd Nov 1936 | Box 94 \ 4 scan0087 | |
| Driving visibility and chassis frame height for the Phantom III. | 6th Nov 1936 | Box 94 \ 4 scan0088 | |
| Blueprint detailing the height of the frame from the ground at the rear end, assuming the car is fully laden. | 9th Nov 1936 | Box 94 \ 4 scan0089 | |
| Blueprint detailing the front frame height calculations for a Phantom III vehicle when fully laden. | 5th Nov 1936 | Box 94 \ 4 scan0090 | |
| Confirming receipt of Cruciform Assemblies and Front Crossmember parts for the Phantom III, which were sent to the Experimental Department. | 6th Nov 1936 | Box 94 \ 4 scan0091 | |
| Questioning the use of rubber body mountings and requesting recommendations for the Continental P.III. | 25th Nov 1936 | Box 94 \ 4 scan0092 | |
| Frame heights on two Phantom III cars, 3.AZ.176 and 3.AZ.132. | 27th Nov 1936 | Box 94 \ 4 scan0093 | |
| Standardisation of parts for the Phantom III, detailing the addition of holes in the cross frame to allow clutch cover stud withdrawal without engine removal. | 22th Jan 1937 | Box 94 \ 4 scan0094 | |
| Standardisation of holes in the frame cross member for the Phantom III. | 24th Dec 1936 | Box 94 \ 4 scan0095 | |
| Dimensional error on the Phantom III frame and brakes since the first chassis. | 8th Jun 1937 | Box 94 \ 4 scan0096 | |
| Options to weaken the Phantom III chassis frame by either lightening it or reducing its cost. | 2nd Nov 1937 | Box 94 \ 4 scan0097 | |
| Scheme for holes in the Phantom III frame cross-member to allow for starter motor removal. | 6th May 1938 | Box 94 \ 4 scan0098 | |
| Modification scheme for the Phantom III frame regarding the stay for the 2nd cross member to the body. | 16th May 1938 | Box 94 \ 4 scan0099 | |
| Requesting an update on the agreed modification to the Phantom 111 diagonal rear stays. | 29th Apr 1938 | Box 94 \ 4 scan0100 | |
| Cost breakdown for a Phantom III frame, number 327. | 14th May 1934 | Box 94 \ 4 scan0101 | |
| Design considerations and proposals for the Spectre Propeller Shaft. | 14th May 1934 | Box 94 \ 4 scan0102 | |
| Required specifications for a Spectre model's propeller shaft. | 16th Jun 1934 | Box 94 \ 4 scan0103 | |
| Follow-up letter from Laycock Engineering Co regarding the status of a Layrub Shaft supplied for testing. | 24th May 1935 | Box 94 \ 4 scan0104 | |
| Letter to The Laycock Engineering Co. confirming a supplied Layrub propellor shaft has not yet been tested. | 7th Jun 1935 | Box 94 \ 4 scan0105 | |
| Letter from Laycock Engineering Co. enquiring about the assembly of a Layrub Propeller Shaft for testing, referring to order no. 77848. | 29th Aug 1935 | Box 94 \ 4 scan0106 | |
| Letter to Laycock Engineering Co. Ltd. regretting a delay in testing the Layrub Propellor Shaft. | 4th Sep 1935 | Box 94 \ 4 scan0107 | |
| Experiments on the effects of out-of-balance propeller shafts on the Spectre model. | 17th Sep 1935 | Box 94 \ 4 scan0108 | |
| Longer propeller shaft for the Phantom III Long Chassis, detailing its dimensions and speed limitations. | 31th Jan 1936 | Box 94 \ 4 scan0109 | |
| Specifications for a longer propeller shaft for the Phantom III long chassis. | 31th Jan 1936 | Box 94 \ 4 scan0110 | |
| Seizure issues with the Phantom III propeller shaft and proposed solutions. | 4th May 1936 | Box 94 \ 4 scan0111 | |
| Propeller shaft seizure issues on the Phantom III and proposed solutions. | 4th May 1936 | Box 94 \ 4 scan0112 | |
| Request to modify a balancing cage for Ph.III propeller shafts due to balancing issues. | 6th May 1936 | Box 94 \ 4 scan0113 | |
| Necessity and methods for balancing propeller shafts on the Phantom III model. | 1st May 1936 | Box 94 \ 4 scan0114 | |
| Joint vibration issues due to lubricant balance and the testing of a Bentley Hardy Spicer joint. | 12th May 1936 | Box 94 \ 4 scan0115 | |
| Photograph of a split metal clamping ring with its associated screws. | 20th May 1936 | Box 94 \ 4 scan0116 | |
| Hardy Spicer propeller shaft for the Phantom III, with attached prints and stress data. | 20th May 1936 | Box 94 \ 4 scan0117 | |
| Comparative analysis of propeller shaft joint specifications for the Ph.III model. | 30th May 1936 | Box 94 \ 4 scan0118 | |
| The failure of a rear universal joint on a Vulture car's propeller shaft and the proposal for a new joint design. | 30th May 1936 | Box 94 \ 4 scan0119 | |
| Photograph of a universal joint or a similar mechanical linkage component. | 1st Jul 1936 | Box 94 \ 4 scan0120 | |
| Study of methods and equipment for balancing the chassis propeller shaft. | 1st Jul 1936 | Box 94 \ 4 scan0121 | |
| Requesting investigation into improving balance before implementing a new method. | 1st Jul 1936 | Box 94 \ 4 scan0122 | |
| Technical note on material specifications for the Phantom III universal joint unit on the propeller shaft. | 5th Jul 1936 | Box 94 \ 4 scan0123 | |
| Propeller shaft spindle test, comparing a Phantom III R.R. shaft with a Bentley Hardy Spicer shaft. | 7th Jul 1936 | Box 94 \ 4 scan0124 | |
| Lubrication issues with propeller shafts on 25/30 and Phantom III models, recommending a new lubricator. | 5th Aug 1936 | Box 94 \ 4 scan0125 | |
| Lubrication complaints for the sliding keys in the propeller shaft and recommending a change in grease. | 19th Aug 1936 | Box 94 \ 4 scan0126 | |
| Reverting to Duckham's HBB grease for propellor shaft sliding joints due to issues with a thinner alternative. | 20th Aug 1936 | Box 94 \ 4 scan0127 | |
| Inadequacy of balancing Phantom III propeller shafts with kidney-shaped washers and recommending a new balancing flange. | 28th Aug 1936 | Box 94 \ 4 scan0128 | |
| Request to prepare a propeller shaft with a damper for a Phantom III. | 20th Oct 1936 | Box 94 \ 4 scan0129 | |
| Specifications for the Phantom III Propeller Shaft. | 26th Oct 1936 | Box 94 \ 4 scan0130 | |
| Friction coefficient on propeller shaft splines for Hardy-Spicer and Phantom III shafts, and proposing further tests. | 29th Oct 1936 | Box 94 \ 4 scan0131 | |
| Leaflet detailing the features of British-made 'Mechanics' Universal Joints of the roller bearing type. | 29th Oct 1936 | Box 94 \ 4 scan0132 | |
| Memo requesting a quote for a Bentley shaft, comparing it to a competitor's product. | 11th Nov 1936 | Box 94 \ 4 scan0133 | |
| Letter from Benjamin Whittaker Ltd. discussing the supply and specifications of Mechanics Cardan Shafts. | 11th Nov 1936 | Box 94 \ 4 scan0134 | |
| Request for a confirmatory test on a Hardy Spicer Phantom II propeller shaft to investigate its co-efficient of friction. | 16th Nov 1936 | Box 94 \ 4 scan0135 | |
| Instruction to run all Phantom III cars with the propeller shaft sliding joint at the rear. | 21th Nov 1936 | Box 94 \ 4 scan0136 | |
| Production difficulties and potential solutions for chassis propeller shafts. | 11th Dec 1936 | Box 94 \ 4 scan0137 | |
| Experiments on propeller shaft balance to determine noticeable unbalance levels. | 12th Dec 1936 | Box 94 \ 4 scan0138 | |
| Adaptation of the Wraith II propeller shaft for the Phantom III chassis. | 7th Dec 1937 | Box 94 \ 4 scan0139 | |
| Continuation sheet detailing adjustments to joints and modifications to a lubricator for a transmission flywheel damper. | 11th Feb 1937 | Box 94 \ 4 scan0140 | |
| Design, supplier, and material specifications for the Phantom III propeller shaft. | 11th Feb 1937 | Box 94 \ 4 scan0141 | |
| Requesting the construction of a Phantom III prop shaft damper with twice the inertia of the 25/30 unit. | 15th Feb 1937 | Box 94 \ 4 scan0142 | |
| Requesting the balancing of a high inertia damper from engine 37-EX for fitment to engine 32-EX. | 3rd Mar 1937 | Box 94 \ 4 scan0143 | |
| Requesting the construction of a new high inertia propeller shaft damper for the Phantom III. | 3rd Mar 1937 | Box 94 \ 4 scan0144 | |
| Propeller shaft clearance on the experimental Phantom III cars. | 17th Mar 1937 | Box 94 \ 4 scan0145 | |
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