| Description | Date | Identifier | |
| Manufacturing methods for chassis propeller shafts using welded tubes. | 14th Dec 1936 | Box 148 \ 4 scan0050 | |
| Comparing the propeller shaft designs of the Wraith, Bentley, and Phantom III models. | 17th Dec 1936 | Box 148 \ 4 scan0051 | |
| Modification to the Hardy Spicer type propeller shaft for the Phantom III, Wraith, and Bentley models. | 27th Jan 1937 | Box 148 \ 4 scan0052 | |
| Directive to continue with the original weldless tube propeller shaft due to failures with the experimental welded tube. | 5th Feb 1937 | Box 148 \ 4 scan0053 | |
| Examination and report on the microstructure and strength of a welded propeller shaft. | 24th Feb 1937 | Box 148 \ 4 scan0054 | |
| Standardising the Hardy Spicer propeller shaft instead of experimenting with a welded swaged tube. | 25th Feb 1937 | Box 148 \ 4 scan0055 | |
| Request to Hardy, Spicer & Co. for a shorter propeller shaft for testing purposes. | 24th May 1937 | Box 148 \ 4 scan0056 | |
| Letter from Hardy Spicer & Co. Limited confirming they are proceeding with a new Propeller Shaft and enclosing an official acknowledgment. | 28th May 1937 | Box 148 \ 4 scan0057 | |
| Acknowledgment of order from Hardy Spicer & Co. Limited for one set of parts. | 25th May 1937 | Box 148 \ 4 scan0058 | |
| Cost-reduction modification to the propeller shaft damper for the 25/30 and Bentley models. | 31th May 1937 | Box 148 \ 4 scan0059 | |
| Damper issues proposing an alternative bonded friction material instead of phosphor bronze. | 31th May 1937 | Box 148 \ 4 scan0060 | |
| Requesting a confirmatory order for a propeller shaft with a modified length from Hardy Spicer Ltd. | 29th May 1937 | Box 148 \ 4 scan0061 | |
| Letter to Hardy Spicer & Co. Ltd. regarding balance and noise issues with propeller shafts supplied for testing. | 3rd Aug 1937 | Box 148 \ 4 scan0062 | |
| Letter from Hardy Spicer & Co. regarding the balancing of shafts, fitting lubricators, and joint types. | 9th Aug 1937 | Box 148 \ 4 scan0063 | |
| Letter to Messrs. Hardy Spicer & Co. Ltd. regarding a replacement propellor shaft. | 10th Aug 1937 | Box 148 \ 4 scan0064 | |
| Supply and balancing of propeller shafts from Hardy Spicer, specifically concerning the fitting of grease nipples. | 16th Aug 1937 | Box 148 \ 4 scan0065 | |
| The supply of Hardy-Spicer grease nipples for propeller shafts. | 19th Aug 1937 | Box 148 \ 4 scan0066 | |
| The supply of Propeller Shaft Dampers for Bentley and 25/30 HP chassis. | 1st Sep 1937 | Box 148 \ 4 scan0067 | |
| Non-standard Hardy Spicer propeller shaft coupling nuts on Wraith III and Bentley models. | 2nd Sep 1937 | Box 148 \ 4 scan0068 | |
| Revised method for joining the universal joint to the propeller shaft after a failure. | 11th Mar 1938 | Box 148 \ 4 scan0069 | |
| Letter to Hardy Spicer & Co. Ltd. enquiring about the guarantee for their propeller shafts. | 24th May 1938 | Box 148 \ 4 scan0070 | |
| Letter from Hardy Spicer & Co. Ltd. discussing guarantee periods and enclosing a quotation form. | 26th May 1938 | Box 148 \ 4 scan0071 | |
| Blank quotation letterhead from Hardy Spicer & Co. Ltd for supplying parts. | 30th May 1938 | Box 148 \ 4 scan0072 | |
| Guarantee for Hardy Spicer propellor shafts. | 30th May 1938 | Box 148 \ 4 scan0073 | |
| Letter to J.A. Daniell of Messrs. Hardy, Spicer & Co., Ltd. regarding the acceptance of a one-year guarantee. | 31th May 1938 | Box 148 \ 4 scan0074 | |
| Letter to Hardy Spicer & Co. Ltd. regarding a propeller shaft failure during a dynamometer test. | 5th Jul 1938 | Box 148 \ 4 scan0075 | |
| Requesting a broken propeller shaft be forwarded to the Hardy Spicer Co. for examination after failure. | 5th Jul 1938 | Box 148 \ 4 scan0076 | |
| Letter from Hardy Spicer & Co. Ltd. discussing issues with a shaft following dynamometer tests. | 6th Jul 1938 | Box 148 \ 4 scan0077 | |
| Letter to Hardy Spicer & Co. Ltd. discussing a shaft failure during dynamometer testing due to heat and seizing. | 7th Jul 1938 | Box 148 \ 4 scan0078 | |
| Letter from Hardy Spicer & Co. Ltd. discussing joint performance in dynamometer tests for different engine types. | 8th Jul 1938 | Box 148 \ 4 scan0079 | |
| Letter to Hardy Spicer & Co. regarding the analysis of a star centre from a joint after a dynamometer test. | 14th Sep 1938 | Box 148 \ 4 scan0080 | |
| Requesting a Trunnion part be posted to the Hardy Spicer Company. | 14th Sep 1938 | Box 148 \ 4 scan0081 | |
| Letter from Hardy Spicer & Co. Limited acknowledging receipt of a letter and advising of a delay. | 15th Sep 1938 | Box 148 \ 4 scan0082 | |
| Letter from Hardy Spicer & Co. Ltd. discussing joint hardness specifications and measurements. | 6th Oct 1938 | Box 148 \ 4 scan0083 | |
| The second page of a typed letter to G. H. Grylls Esq. signed by a Director. | 6th Oct 1938 | Box 148 \ 4 scan0084 | |
| Letter from Hardy Spicer & Co. providing a layout for a Rubber Mounted Needle Bearing Midship Housing. | 12th Oct 1938 | Box 148 \ 4 scan0085 | |
| Suggestion to modify propeller shaft joints on B.111, B.50 and Silver Wraith models. | 14th Oct 1938 | Box 148 \ 4 scan0086 | |
| Letter from Hardy Spicer & Co. Ltd. discussing journal investigation and radial clearance tolerances. | 1st Nov 1938 | Box 148 \ 4 scan0087 | |
| Adoption of the RR universal joint with needle bearings, weighing its benefits against the increased cost. | 9th Nov 1938 | Box 148 \ 4 scan0088 | |
| Letter from Hardy Spicer & Co. discussing the case depth of a journal and a proposed new joint design. | 10th Nov 1938 | Box 148 \ 4 scan0089 | |
| Letter to Hardy Spicer & Co. Ltd. regarding drawing GCD.1011 for a 1350 type joint for the Wraith chassis, requesting three test shafts. | 10th Nov 1938 | Box 148 \ 4 scan0090 | |
| Letter from Bendix Limited concerning the Weiss constant velocity universal joint. | 11th Nov 1938 | Box 148 \ 4 scan0091 | |
| Requesting a hardness check on Hardy Spicer propeller shaft spiders and R.R. Ph.III outer races. | 15th Nov 1938 | Box 148 \ 4 scan0092 | |
| Letter from Hardy Spicer & Co. regarding a proposed change from 1300 to 1350 series splines and a discrepancy in Rockwell hardness tests. | 16th Nov 1938 | Box 148 \ 4 scan0093 | |
| Letter from Hardy, Spicer & Co. regarding the supply and testing of shafts and joints. | 16th Nov 1938 | Box 148 \ 4 scan0094 | |
| Letter from the Experimental Department to a supplier requesting a specific propeller shaft slip joint for a Bentley chassis. | 23th Nov 1938 | Box 148 \ 4 scan0095 | |
| Letter from Hardy Spicer & Co. Ltd. discussing the specifications and availability of different types of universal joints. | 25th Nov 1938 | Box 148 \ 4 scan0096 | |
| Testing and implementing a larger 1350 type joint for the Wraith propellor shaft. | 25th Nov 1938 | Box 148 \ 4 scan0097 | |
| Advice note from Hardy Spicer & Co. Ltd. for the dispatch of Spicer Joints and associated parts. | 26th Nov 1938 | Box 148 \ 4 scan0098 | |
| Letter to J.A. Daniell of Hardy Spicer & Co. regarding the supply and specification of joints. | 28th Nov 1938 | Box 148 \ 4 scan0099 | |
| Laboratory report on the results of Rockwell hardness tests for propeller shaft spiders and Phantom III outer races. | 29th Nov 1938 | Box 148 \ 4 scan0100 | |
| Letter from Hardy Spicer & Co. Ltd. regarding a joint with a 26-degree angle and an enclosed print. | 30th Nov 1938 | Box 148 \ 4 scan0101 | |
| Acknowledgment of order from Hardy Spicer & Co. Limited for a single part with a note about pricing. | 1st Dec 1938 | Box 148 \ 4 scan0102 | |
| Letter to Hardy Spicer & Co. Ltd. regarding the replacement of a wide-angle joint with a standard 1550 type joint. | 5th Jan 1939 | Box 148 \ 4 scan0103 | |
| Letter from Hardy Spicer & Co. Ltd. confirming an order modification for a joint layout. | 9th Jan 1939 | Box 148 \ 4 scan0104 | |
| Inquiry to Hardy Spicer & Co. about servicing the 1350 type propellor shaft on the Wraith chassis. | 18th Jan 1939 | Box 148 \ 4 scan0105 | |
| Letter from Hardy Spicer & Co. Ltd. explaining the use of pressings in nipple threads during transit. | 19th Jan 1939 | Box 148 \ 4 scan0106 | |
| Confirming a telephone order for a propeller shaft from supplier Hardy Spicers. | 5th Apr 1939 | Box 148 \ 4 scan0107 | |
| Telegram received by telephone concerning the arrival of a shaft in Derby. | 13th Apr 1939 | Box 148 \ 4 scan0108 | |
| Telegram confirming the arrival details for shaft 90071 in Derby. | 13th Apr 1934 | Box 148 \ 4 scan0109 | |
| Letter to a supplier regarding measurements and distortion of a joint. | 28th Apr 1939 | Box 148 \ 4 scan0110 | |
| Letter to Delco-Remy & Hyatt Ltd. requesting three New Departure Seal Bearings for immediate test. | 5th May 1939 | Box 148 \ 4 scan0111 | |
| Letter from Delco-Remy & Hyatt Ltd regarding the urgent supply of bearings for experimental purposes. | 6th May 1939 | Box 148 \ 4 scan0112 | |
| Trial and fitting of a new type of Propellor Shaft Centre Bearing following a failure. | 8th May 1939 | Box 148 \ 4 scan0113 | |
| Requesting a rig test on a propeller shaft centre bearing to compare grease retaining life. | 12th May 1939 | Box 148 \ 4 scan0114 | |
| Letter to a supplier clarifying manufacturing tolerances for propeller shaft universal joint components. | 12th May 1939 | Box 148 \ 4 scan0115 | |
| Letter to Messrs. Hardy Spicer & Co. Ltd. regarding the sending of universal joint parts for inspection against a drawing. | 12th May 1939 | Box 148 \ 4 scan0116 | |
| The correct fitting position of the propeller shaft sliding joint. | 6th Jun 1939 | Box 148 \ 4 scan0117 | |
| Instruction on fitting the sliding joint of the rear propeller shaft for B.V. B.50 & Silver Wraith models. | 6th Jun 1939 | Box 148 \ 4 scan0118 | |
| Confirming a request to hand over a new propeller shaft bearing for endurance testing. | 24th Jun 1939 | Box 148 \ 4 scan0119 | |
| Letter to Hardy Spicer & Co. Ltd. specifying the balance and run-out limits for divided propellor shafts. | 27th Jun 1939 | Box 148 \ 4 scan0120 | |
| Letter to Messrs. Hardy Spicer & Co. Ltd. regarding the return of divided shafts for corrective treatment. | 27th Jun 1939 | Box 148 \ 4 scan0121 | |
| Requesting the despatch of a B.V. propeller shaft to Messrs. Hardy Spicer & Co. Ltd. for re-balancing and straightening. | 27th Jun 1939 | Box 148 \ 4 scan0122 | |
| Unbalance issues with rationalised chassis propellor shafts and supplier coordination. | 29th Jun 1939 | Box 148 \ 4 scan0123 | |
| Instruction to return all shafts received for the fitting of new nose pieces with machining allowance and re-balancing. | 29th Jun 1939 | Box 148 \ 4 scan0124 | |
| Letter from Hardy Spicer & Co. regarding divided propeller shafts and revisions to the concentricity of midship bearing shafts. | 29th Jun 1939 | Box 148 \ 4 scan0125 | |
| Internal memorandum regarding the ordering and specification of propeller shaft centre bearings. | 30th Jun 1939 | Box 148 \ 4 scan0126 | |
| Request to add a balance tolerance note to the Intermediate Propeller Shaft drawing. | 1st Jul 1939 | Box 148 \ 4 scan0127 | |
| Brief review on the condition of the propellor shaft centre bearing G.C.D. 247 after a 90-hour test rig. | 3rd Jul 1939 | Box 148 \ 4 scan0128 | |
| Decision that suppliers will deliver finished machined intermediate propeller shafts due to machining difficulties. | 10th Jul 1939 | Box 148 \ 4 scan0129 | |
| Letter to supplier Hardy Spicer & Co. Ltd. regarding unsatisfactory welding and machining of the intermediate propeller shaft. | 18th Jul 1939 | Box 148 \ 4 scan0130 | |
| The improved lubrication of the propeller shaft centre bearing. | 19th Jul 1939 | Box 148 \ 4 scan0131 | |
| Drawing for a propellor shaft for the over-hung pinion axle on the Ripple car. | 21th Jul 1939 | Box 148 \ 4 scan0132 | |
| Request to Hardy Spicer & Co. Ltd. for drawings of joints smaller than the 1300 type for use in an experimental rig. | 11th Aug 1939 | Box 148 \ 4 scan0133 | |
| Proposal to use a gearbox with a single propeller shaft and the resulting body modifications. | 14th Nov 1939 | Box 148 \ 4 scan0134 | |
| Letter to Hardy Spicer & Co. Ltd. inquiring about a propeller shaft design seen on American cars. | 12th Mar 1940 | Box 148 \ 4 scan0135 | |
| Mandating the fitting of isolated propellor shaft bearings to all production B.V. cars following experimental tests. | 14th Mar 1940 | Box 148 \ 4 scan0136 | |
| Letter from Hardy Spicer & Co. Ltd. discussing the transfer of spline from the propeller shaft to the gearbox. | 14th Mar 1940 | Box 148 \ 4 scan0137 | |
| Confirmation memo regarding modifications to propeller shaft needle bearings and cages. | 21th Mar 1940 | Box 148 \ 4 scan0138 | |
| Letter to Hardy Spicer & Co. Ltd. regarding a propeller shaft sliding joint arrangement. | 28th Mar 1940 | Box 148 \ 4 scan0139 | |
| Cross-section diagram of a gearbox shaft featuring an oil retaining thread. | 2nd Apr 1940 | Box 148 \ 4 scan0140 | |
| Letter from Hardy Spicer & Co. Ltd. discussing the arrangement of splines on a propeller shaft compared to a sketch provided by Rolls Royce. | 2nd Apr 1940 | Box 148 \ 4 scan0141 | |
| Drawing illustrating stress or flow lines in a T-shaped component. | 6th Sep 1940 | Box 148 \ 4 scan0142 | |
| Blueprints for a modified propeller shaft for the Ripplet Chassis. | 6th Sep 1940 | Box 148 \ 4 scan0143 | |
| Request to arrange for an isolated centre bearing to be fitted to a propeller shaft on a car. | 22th Apr 1940 | Box 148 \ 4 scan0144 | |
| Requesting the handover of 12 sets of isolated propellor shaft bearing parts to Mr. Reid. | 24th Apr 1940 | Box 148 \ 4 scan0145 | |
| Confirming the completion of 12 sets of rubber-mounted support brackets for Bentley V Production Cars. | 12th Apr 1940 | Box 148 \ 4 scan0146 | |
| Project for a simplified propeller shaft centre bearing for the Senior Range. | 30th May 1940 | Box 148 \ 4 scan0147 | |
| On a project for a simplified propeller shaft centre bearing for the Senior Range. | 30th May 1940 | Box 148 \ 4 scan0148 | |
| Notes and calculations for propeller shaft specifications based on a formula from Vauxhall and Hardy Spicers. | 8th Jun 1940 | Box 148 \ 4 scan0149 | |
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