| Description | Date | Identifier | |
| Sources of heat entering the driving compartment and proposed solutions. | 8th Sep 1932 | Box 136 \ 5 scan0056 | |
| Floorboard sealing, material choices like Plymax, and scuttle ventilation systems. | 8th Sep 1932 | Box 136 \ 5 scan0057 | |
| Methods to prevent heat from entering the driving compartment, referencing previous alterations and drawings. | 12th Sep 1932 | Box 136 \ 5 scan0058 | |
| Investigating the issue of hot air entering the driving compartment through the gear lever quadrant. | 20th Sep 1932 | Box 136 \ 5 scan0059 | |
| Methods to prevent hot air and gases from entering the vehicle's front compartment around the gear and brake levers. | 20th Sep 1932 | Box 136 \ 5 scan0060 | |
| Page 2 of a memo regarding an urgent scheme to prevent heat from entering the front compartment of cars. | 20th Sep 1932 | Box 136 \ 5 scan0061 | |
| Proposal with a diagram for a method to prevent gas from entering the car body from under the floorboards. | 16th Sep 1932 | Box 136 \ 5 scan0062 | |
| Combined gas and draught shield to prevent heat in the driving compartment. | 23th Sep 1932 | Box 136 \ 5 scan0063 | |
| Correcting a drawing number concerning heat in the driving compartment. | 27th Sep 1932 | Box 136 \ 5 scan0064 | |
| Rejection of a General Motors body ventilation scheme due to its negative impact on appearance and weight. | 27th Feb 1933 | Box 136 \ 5 scan0065 | |
| Advocating for the adoption of a superior U.S.A. car ventilation system, criticising current efforts as feeble. | 15th Jul 1933 | Box 136 \ 5 scan0066 | |
| The review of car ventilation, referencing a Buick scheme. | 17th Jul 1933 | Box 136 \ 5 scan0067 | |
| Testing the Buick 'No Draft' ventilation system on a 20/25 HP car. | 18th Jul 1933 | Box 136 \ 5 scan0068 | |
| Options for sourcing and implementing a car ventilation system. | 19th Jul 1933 | Box 136 \ 5 scan0069 | |
| Delay in fitting the Buick 'No Draft' ventilation system due to parts availability from General Motors. | 1st Aug 1933 | Box 136 \ 5 scan0070 | |
| Customer complaints about excessive heat from the front floorboards on Phantom II & 20/25 HP chassis models. | 29th Aug 1933 | Box 136 \ 5 scan0071 | |
| The reinstatement of the recommendation for top scuttle ventilators on Rolls-Royce and Bentley chassis. | 19th Sep 1933 | Box 136 \ 5 scan0072 | |
| Petrol tank ventilation tests, recommending sealing the filler compartment rather than fitting a special breather pipe. | 30th Aug 1938 | Box 136 \ 5 scan0073 | |
| Circulating recommendations for petrol tank ventilation to coachbuilders. | 28th Sep 1933 | Box 136 \ 5 scan0074 | |
| Negotiation terms for a licence for the Fisher Ventilating System. | 6th Nov 1933 | Box 136 \ 5 scan0075 | |
| Adoption of the Fisher body ventilation scheme and its superiority over existing systems. | 6th Nov 1933 | Box 136 \ 5 scan0076 | |
| The poor state of car ventilation and the plan to license and test the Fisher ventilation system. | 7th Nov 1933 | Box 136 \ 5 scan0077 | |
| Delays in fitting a Fisher ventilation scheme to car GRW-70 due to issues with obtaining parts from the U.S.A. | 1st Nov 1933 | Box 136 \ 5 scan0078 | |
| Requesting two sets of semi-isolated floorboards to prevent booming for Phantom II and 25 HP chassis. | 5th Jan 1934 | Box 136 \ 5 scan0079 | |
| Ventilation system on new Bentley cars, comparing it unfavorably to the Fisher scheme. | 5th Feb 1934 | Box 136 \ 5 scan0080 | |
| Comparing the Fisher (American) and Quicktho (British) car ventilation systems. | 9th Feb 1934 | Box 136 \ 5 scan0081 | |
| Comparing the 'Fisher' and 'Quicktho' window schemes, discussing patent licensing and application in different car bodies. | 8th Feb 1934 | Box 136 \ 5 scan0082 | |
| Test report on rubber-covered metal floorboards for a Bentley vehicle. | 23th Feb 1934 | Box 136 \ 5 scan0083 | |
| Instructing the despatch of Bentley floorboards and other parts to be sent for rubber covering. | 25th Apr 1954 | Box 136 \ 5 scan0084 | |
| Comparing different body ventilation and window schemes. | 4th May 1934 | Box 136 \ 5 scan0085 | |
| Operation and complexity of a window and deflector mechanism. | 4th Aug 1934 | Box 136 \ 5 scan0086 | |
| Production of new metal floorboards for the Streamlined Bentley. | 25th May 1934 | Box 136 \ 5 scan0087 | |
| Design and standardization of metal floorboards for a Bentley chassis. | 25th May 1934 | Box 136 \ 5 scan0088 | |
| Reviewing a patent 'No-Draught Ventilation' scheme by Mr. Simms of Cleveland. | 16th Jul 1934 | Box 136 \ 5 scan0089 | |
| Cost-effectiveness and standardization of sheet metal floorboards for various chassis models. | 18th Jul 1934 | Box 136 \ 5 scan0090 | |
| Costs and feasibility of fitting sheet metal floorboards on Bentley cars. | 25th Jul 1934 | Box 136 \ 5 scan0091 | |
| Use of sheet metal floorboards on Bentley cars, questioning their advantages and issues with heat transmission. | 26th Jul 1934 | Box 136 \ 5 scan0092 | |
| Secret memo discussing the advantages of using sheet metal pressings for floorboards on the Bentley chassis. | 30th Jul 1934 | Box 136 \ 5 scan0093 | |
| Chassis modifications considering tool cost, gearbox placement, and floorboard shape. | 30th Jul 1934 | Box 136 \ 5 scan0094 | |
| Issues with Bentley florboards softening and a proposal to increase material gauge and stiffener rigidity. | 7th Nov 1934 | Box 136 \ 5 scan0095 | |
| Laboratory memo discussing the material hardness, specifications, and cost for aluminium sheet floorboards. | 7th Nov 1934 | Box 136 \ 5 scan0096 | |
| Costs and benefits of introducing sheet metal floorboards for Bentley vehicles. | 8th Nov 1934 | Box 136 \ 5 scan0097 | |
| Use of sheet metal floorboards in Bentley bodies to prevent 'booming' and contact with the gearbox. | 12th Nov 1934 | Box 136 \ 5 scan0098 | |
| The failure of Bentley metal floorboards and proposed improvements. | 22th Nov 1934 | Box 136 \ 5 scan0099 | |
| Comparison between a mild steel and an aluminium rear board, with a note on floorboards for a Bentley. | 22th Nov 1934 | Box 136 \ 5 scan0100 | |
| Experiments and modifications for sheet metal floorboards on a Bentley, noting clearance issues. | 26th Nov 1934 | Box 136 \ 5 scan0101 | |
| Standardisation of sheet metal floorboards. | 30th Oct 1934 | Box 136 \ 5 scan0102 | |
| Cost estimate for extra jigs, tools and equipment for the 'D' series chassis. | 20th Sep 1934 | Box 136 \ 5 scan0103 | |
| The production and modification of Bentley sheet metal floorboards. | 5th Apr 1935 | Box 136 \ 5 scan0104 | |
| Invoice for verbally ordered rubber-covered floorboards. | 15th Apr 1935 | Box 136 \ 5 scan0105 | |
| Request to place an official order for one sample pair of rubber-covered floorboards. | 26th Apr 1935 | Box 136 \ 5 scan0106 | |
| Issues with deflecting sheet metal floorboards and proposing material and design changes. | 4th Nov 1935 | Box 136 \ 5 scan0107 | |
| Gas-tightening of levers for the 20/25 HP chassis floorboards. | 4th Dec 1935 | Box 136 \ 5 scan0108 | |
| Stiffening of Bentley floorboards to prevent drumming around the headlamp foot switch. | 6th Dec 1935 | Box 136 \ 5 scan0109 | |
| Request to fit improved sheet metal floorboards to specific chassis. | 11th Dec 1935 | Box 136 \ 5 scan0110 | |
| Noise insulation options for Bentley and Phantom III floorboards, comparing rubber mats to rubberised felt. | 3rd Apr 1936 | Box 136 \ 5 scan0111 | |
| Continued use of rubberised floorboards on the Bentley and Ph.III chassis. | 3rd Apr 1936 | Box 136 \ 5 scan0112 | |
| Attached invoice received from Messrs. H.J. Townsend & Son. | 21th Oct 1936 | Box 136 \ 5 scan0113 | |
| Letter to Messrs. Park Ward & Co. Ltd. recommending a 3/4 inch thickness for 'Rhino' cork core plywood floorboards. | 13th Oct 1936 | Box 136 \ 5 scan0114 | |
| Letter from coachbuilders Park Ward & Co. Ltd concerning 'Rhino' cork core plywood for a new experimental car, 24-G-6. | 10th Oct 1936 | Box 136 \ 5 scan0115 | |
| Proposal to order experimental chassis floorboards for the Wraith III, comparing cork core and Balsa core plywood. | 3rd Jun 1937 | Box 136 \ 5 scan0116 | |
| Performance and fitting issues of different chassis floorboard materials for the Wraith III. | 16th Jun 1937 | Box 136 \ 5 scan0117 | |
| Request for a new scheme for the Phantom III floorboards to accommodate a new Lucas foot dipping switch. | 2nd Jul 1937 | Box 136 \ 5 scan0118 | |
| Recommending Balsa wood over Rino cork ply wood for the Wraith floorboards due to its superior water resistance. | 18th Nov 1937 | Box 136 \ 5 scan0119 | |
| Scheme for a modified dash bracket on the Wraith III to carry the floorboards, making them interchangeable. | 22th Nov 1937 | Box 136 \ 5 scan0120 | |
| Modifications to the Wraith III floorboards and rear angle piece to reduce pressing costs. | 3rd Dec 1937 | Box 136 \ 5 scan0121 | |
| The schemes and construction of floorboards for the Bentley 111. | 21th Jan 1938 | Box 136 \ 5 scan0122 | |
| The design and supply of Bentley SO floorboards and a centre floorboard scheme. | 7th Apr 1938 | Box 136 \ 5 scan0123 | |
| Scheme for a spring-loaded Rear Bore Dipstick Cover Hinge for Bentley 3 and 50 floorboards. | 9th Jul 1938 | Box 136 \ 5 scan0124 | |
| Floorboard scheme for Bentley 111, Bentley 50, and Wraith 80 models. | 3rd Dec 1938 | Box 136 \ 5 scan0125 | |
| Floorboards and an experimental foot switch for Bentley 5, Bentley 50, and Wraith 80 models. | 23th Dec 1938 | Box 136 \ 5 scan0126 | |
| Instruction to change the specification of the floorboard pedal gap plate for Bentley and Wraith models. | 10th Mar 1939 | Box 136 \ 5 scan0127 | |
| Letter to Motor Panels (Coventry) Ltd. regarding a blueprint for floorboard fixing screws and replacement bushes. | 23th Jun 1939 | Box 136 \ 5 scan0128 | |
| Letter to Park Ward & Co. Ltd. regarding blueprints for floorboard fixing screws and floorboard alterations. | 26th Jun 1939 | Box 136 \ 5 scan0129 | |
| To simplify the ordering of floorboard parts by altering supplier notes on the List of Parts (LOP's). | 10th Jul 1939 | Box 136 \ 5 scan0130 | |
| Description of Gleason Hypoid Gears, outlining their function and advantages. | 26th Jan 1926 | Box 136 \ 5 scan0131 | |
| Analysis of hypoid gear design, load carrying capacity, wear characteristics, and comparison with spiral bevel gears. | 26th Jan 1926 | Box 136 \ 5 scan0132 | |
| Technical document detailing the characteristics, advantages, and production of hypoid gears and pinions. | 26th Jan 1926 | Box 136 \ 5 scan0133 | |
| The process and machinery for cutting and finishing gears and pinions using spherical cutters. | 6th Oct 1926 | Box 136 \ 5 scan0134 | |
| Design of a rear axle casing with hypoid gears. | 6th Oct 1926 | Box 136 \ 5 scan0135 | |
| Modifications for the EAC-9 and 10 hypoid gear rear axle. | 28th Oct 1926 | Box 136 \ 5 scan0136 | |
| Design and specifications of EAC-9 & 10 Hypoid Gears. | 29th Oct 1926 | Box 136 \ 5 scan0137 | |
| Experiences of American engineers with Hypoid bevel gears. | 3rd Nov 1926 | Box 136 \ 5 scan0138 | |
| Material choices for hypoid gears, specifically manganese and aluminium bronze. | 22th Nov 1926 | Box 136 \ 5 scan0139 | |
| Production challenges, materials, and industry intelligence concerning hypoid gears. | 30th Dec 1926 | Box 136 \ 5 scan0140 | |
| Testing a new gear construction on buses and subsequent issues with the ring gear. | 30th Dec 1926 | Box 136 \ 5 scan0141 | |
| Axle modifications and the use of hypoid gears. | 1st Apr 1927 | Box 136 \ 5 scan0142 | |
| Confirming the Gleason Company will produce hypoid gears to the latest drawings and an order has been placed for six sets. | 14th Apr 1927 | Box 136 \ 5 scan0143 | |
| Specifications and application of 1' and 2' off-set hypoid gears. | 14th Apr 1927 | Box 136 \ 5 scan0144 | |
| Lowering the chassis frame by using a smaller back axle bevel gear and a hypoid gear. | 5th Jun 1927 | Box 136 \ 5 scan0145 | |
| Design, modification, and procurement of hypoid rear axle gears. | 25th Jun 1927 | Box 136 \ 5 scan0146 | |
| The frame for experimental cars EAC.10 and EAC.12, requesting production of side members. | 8th Jul 1927 | Box 136 \ 5 scan0147 | |
| Layout for EAC.10 and detailing the similar EAC.12, which will feature hypoid axle gears. | 8th Jul 1927 | Box 136 \ 5 scan0148 | |
| Design and manufacturing of hypoid gears, focusing on issues with tooth abrasion and proposals for a new offset. | 9th Jul 1927 | Box 136 \ 5 scan0149 | |
| Letter from Rolls Royce of America to Rolls-Royce Ltd. regarding a promised delivery date for three pairs of Hypoid Gears. | 21th Sep 1927 | Box 136 \ 5 scan0150 | |
| Use of Whitmores' 'Zero' oil for Hypoid Gears. | 26th Sep 1927 | Box 136 \ 5 scan0151 | |
| Stating the dry weight of the Hypoid Axle according to a specific arrangement drawing. | 30th Dec 1927 | Box 136 \ 5 scan0152 | |
| Testing on hypoid rear axle gears and proposing a change. | 1st Jan 1928 | Box 136 \ 5 scan0153 | |
| Comparative table of weights for different types of bevel wheels and pinions for axles. | 3rd Jan 1928 | Box 136 \ 5 scan0154 | |
| Trial of a hypoid axle with a 1-inch offset, detailing bearing adaptations. | 14th Jan 1928 | Box 136 \ 5 scan0155 | |
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