| Description | Date | Identifier | |
| Bentley frame distortion test results with dashboard and 2nd crossmember. | 27th Apr 1935 | Box 86 \ 4 scan0197 | |
| Blueprint for an experimental stiffener for the front of a Bentley chassis frame. | 7th May 1935 | Box 86 \ 4 scan0198 | |
| Request to twist a distorted Bentley chassis frame back to its normal position for fitting a new stiffener. | 7th May 1935 | Box 86 \ 4 scan0199 | |
| Blueprint of the front cross bracing for a Bentley chassis. | 10th May 1935 | Box 86 \ 4 scan0200 | |
| Data sheet detailing measurements for a Bentley Chassis Frame fitted with diamond bracing at the front end. | 21th Jun 1935 | Box 86 \ 4 scan0201 | |
| Test data showing deflection measurements for a Bentley frame under various loads. | 19th Jul 1935 | Box 86 \ 4 scan0202 | |
| Measurement data for a Bentley chassis frame, boxed at the front end and complete with a dashboard. | 7th Aug 1935 | Box 86 \ 4 scan0203 | |
| Measurement and specification sheet for a Bentley Frame complete with Dashboard and 2nd Crossmember. | 10th Aug 1935 | Box 86 \ 4 scan0204 | |
| Measurement data for a Bentley frame, complete with dashboard and without the 2nd crossmember. | 10th Aug 1935 | Box 86 \ 4 scan0205 | |
| Requesting a Cadillac type cross be made and fitted to a Bentley test frame, with considerations for side channels. | 13th Aug 1935 | Box 86 \ 4 scan0206 | |
| Modification to the cross-member in a Bentley frame to test for improved stiffness. | 16th Sep 1935 | Box 86 \ 4 scan0207 | |
| Requesting comparative tests on Bentley frame side members, evaluating boxing versus Daimler-style cross-bracing. | 18th Sep 1935 | Box 86 \ 4 scan0208 | |
| Chassis torsion test results for a Bentley chassis. | 20th Sep 1935 | Box 86 \ 4 scan0209 | |
| Outlining proposed modifications for a stiffened chassis frame on a Big Bore Bentley. | 9th Nov 1935 | Box 86 \ 4 scan0210 | |
| Experiments to prevent column shake in the Bentley frame by boxing it in. | 12th Dec 1935 | Box 86 \ 4 scan0211 | |
| The completion and assembly of a stiffened chassis frame for a Big Bore Bentley. | 1st Jan 1935 | Box 86 \ 4 scan0212 | |
| Proposal to test the effect of a stiffer side member for the Bentley chassis frame. | 26th Mar 1936 | Box 86 \ 4 scan0213 | |
| The proposed stiffening of a Bentley frame for test purposes. | 14th May 1936 | Box 86 \ 4 scan0214 | |
| Chassis and body torsion test results for a Bentley 5-B-IV with a stiffened frame. | 18th May 1936 | Box 86 \ 4 scan0215 | |
| The Bentley frame's obsolescence and the development of a stiffened chassis to cure faults. | 16th Jun 1936 | Box 86 \ 4 scan0216 | |
| Technical memorandum comparing vehicle body stiffness, vibration, and ride comfort between different models. | 16th Jun 1936 | Box 86 \ 4 scan0217 | |
| Graph showing the results of chassis and body torsion tests under various loads and configurations. | 16th Jun 1936 | Box 86 \ 4 scan0218 | |
| Graph showing the results of chassis and body torsion tests for a Bentley 5 B IV with a stiffened frame. | 16th Jun 1936 | Box 86 \ 4 scan0219 | |
| Graph showing chassis and body torsion test results for a Bentley frame. | 16th Jun 1936 | Box 86 \ 4 scan0220 | |
| Graph plotting vibration amplitude against excitation frequency for various aircraft components. | 25th Nov 1936 | Box 86 \ 4 scan0221 | |
| Confirming a request for information on side-way shake and shock dampers. | 25th Nov 1936 | Box 86 \ 4 scan0222 | |
| Correspondence regarding feedback on the Bentley III chassis frame cross design from Rubery Owen. | 3rd Mar 1937 | Box 86 \ 4 scan0223 | |
| The development of the Bentley III frame, comparing its weight and cost to the Wraith frame. | 25th Oct 1937 | Box 86 \ 4 scan0224 | |
| Report presenting the results of frame stiffness and torsion tests for various car models. | 25th Oct 1937 | Box 86 \ 4 scan0225 | |
| Table of stiffness measurements in lbs.ft/degree for various Bentley III frame configurations. | 25th Oct 1937 | Box 86 \ 4 scan0226 | |
| Comparative table of chassis dimensions for various car models. | 25th Oct 1937 | Box 86 \ 4 scan0227 | |
| Vehicle frame design, comparing Wraith and B.III frames, riveting vs. welding, and chassis stiffness. | 25th Oct 1937 | Box 86 \ 4 scan0228 | |
| Typed note discussing modifications to a car frame to reduce weight and compare it to Bentley and Wraith models. | 25th Oct 1937 | Box 86 \ 4 scan0229 | |
| Graph showing the results of chassis and body torsion tests for an Oldsmobile Saloon with a Fisher body. | 15th Jun 1937 | Box 86 \ 4 scan0230 | |
| Graph of chassis and body torsion test results for a Wraith chassis. | 17th Jun 1937 | Box 86 \ 4 scan0231 | |
| Graph showing chassis and body torsion tests on a Packard chassis with front wings. | 8th Jun 1937 | Box 86 \ 4 scan0232 | |
| Graph and diagram illustrating the torsional twist characteristics of a welded Bentley III frame. | 8th Jun 1937 | Box 86 \ 4 scan0233 | |
| Photograph of a Bentley Mark III frame with welded gussets, showing its thickness and torsional rigidity. | 8th Jun 1937 | Box 86 \ 4 scan0234 | |
| The torsional rigidity of a Bentley III frame with welded gussets. | 8th Jun 1937 | Box 86 \ 4 scan0235 | |
| Photograph of an all-welded Bentley B frame with a 12ft track. | 8th Jun 1937 | Box 86 \ 4 scan0236 | |
| Specifications for a Bentley III all-welded frame, detailing torsional rigidity for different thicknesses. | 8th Jun 1937 | Box 86 \ 4 scan0237 | |
| The torsional rigidity of an unwelded Bentley III frame at different thicknesses. | 8th Jun 1937 | Box 86 \ 4 scan0239 | |
| Photograph of a lightened car chassis frame on a workshop floor. | 8th Jun 1937 | Box 86 \ 4 scan0240 | |
| Torsional stiffness measurements for a Bentley III frame with varying hole configurations. | 3rd May 1939 | Box 86 \ 4 scan0241 | |
| The production of Bentley rebound straps. | 3rd May 1939 | Box 86 \ 4 scan0242 | |
| Proposed scheme for a fan pulley on the camshaft for the Bensport Fan Drive. | 27th Aug 1932 | Box 86 \ 5 scan0001 | |
| Proposed scheme for the Bensport Fan Mounting. | 23th Sep 1932 | Box 86 \ 5 scan0002 | |
| Recommending the use of a Chrysler fan on the 3½ Litre Bentley to improve cooling performance. | 14th Sep 1933 | Box 86 \ 5 scan0003 | |
| Graph comparing the power absorbed and B.M.E.P. for various cooling fans at different RPM. | 18th Sep 1933 | Box 86 \ 5 scan0004 | |
| Blueprint graph showing the results of fan tests on a 3 1/2 Litre Bentley, charting water temperature rise over time. | 9th Sep 1933 | Box 86 \ 5 scan0005 | |
| Performance of a Chrysler-type asymmetrical fan on a 3.5-litre Bentley and proposing further tests with a symmetrical design. | 15th Sep 1933 | Box 86 \ 5 scan0006 | |
| Tests on the power absorbed by three different cooling fans on a Bentley unit. | 16th Sep 1933 | Box 86 \ 5 scan0007 | |
| Blueprint for an experimental Bentley Fan with equally spaced blades. | 26th Sep 1933 | Box 86 \ 5 scan0008 | |
| From Hs/Rm to RHC requesting a Bentley Fan for testing. | 27th Sep 1933 | Box 86 \ 5 scan0009 | |
| Clearing a Bentley fan for future production cars after successful testing. | 17th Oct 1933 | Box 86 \ 5 scan0010 | |
| Standardisation of the fan to prevent engine water boiling when the engine is idling. | 2nd Nov 1933 | Box 86 \ 5 scan0011 | |
| The failure of a fan from a 3½ Litre Bentley chassis during engine testing. | 1st Jan 1934 | Box 86 \ 5 scan0012 | |
| Failure analysis report for a 3½ Litre Bentley Chassis fan, detailing the cause and proposed remedies. | 5th Jan 1934 | Box 86 \ 5 scan0013 | |
| Failure of an experimental Bentley fan on test, comparing it with a standardised production fan. | 12th Jan 1934 | Box 86 \ 5 scan0014 | |
| Shear stress and required size of rivets for the 3.5 litre Bentley chassis fan. | 12th Jan 1934 | Box 86 \ 5 scan0015 | |
| Design history, different versions, and concerns over rivet sizes for the Bentley fan. | 13th Jan 1934 | Box 86 \ 5 scan0016 | |
| The difficulty of removing the Bentley fan belt and proposed modifications. | 30th Jan 1934 | Box 86 \ 5 scan0017 | |
| Bentley fan blade measurements from quietness and running tests. | 14th Mar 1934 | Box 86 \ 5 scan0018 | |
| Tests on the deflection of Bentley fan blade tips. | 14th Mar 1934 | Box 86 \ 5 scan0019 | |
| Instructional error with the Bentley fan's position and proposing modifications for it and the starting handle dog. | 28th Mar 1934 | Box 86 \ 5 scan0020 | |
| Design modification to the starter dog nut and fan hub to simplify the removal of the Bentley fan belt. | 27th Apr 1934 | Box 86 \ 5 scan0021 | |
| The difficulty of removing the Bentley fan belt and proposing a modification to simplify the process. | 30th Apr 1934 | Box 86 \ 5 scan0022 | |
| Difficulty of replacing the fan belt on Bentley chassis and proposing a new belt design. | 3rd May 1934 | Box 86 \ 5 scan0023 | |
| Request to trial a thinner Bentley fan belt from Goodrich Rubber Co. to ease removal. | 8th May 1934 | Box 86 \ 5 scan0024 | |
| Sourcing a modified fan belt for a Bentley, following a discussion with the British Goodrich Company. | 9th May 1934 | Box 86 \ 5 scan0025 | |
| Ordering and fitting modified fan belts for specific Bentley cars. | 29th May 1934 | Box 86 \ 5 scan0026 | |
| Invoice for a flat type fan belt from Goodrich Rubber Co. Ltd. | 4th Jun 1934 | Box 86 \ 5 scan0027 | |
| The return of a Flat Type Fan Belt and the crediting of the account. | 29th Jun 1934 | Box 86 \ 5 scan0028 | |
| Standardisation of parts report for improved starter dogs. | 25th Jun 1934 | Box 86 \ 5 scan0029 | |
| Cost estimate for extra tooling and a note on bringing the 'F' series chassis into production. | 5th Jun 1934 | Box 86 \ 5 scan0030 | |
| Proposal and specification for constructing and testing a new Bentley fan cowling. | 9th Nov 1934 | Box 86 \ 5 scan0031 | |
| Request to build a lightened Bentley fan with aluminium blades for car 5-B-IV. | 25th Mar 1935 | Box 86 \ 5 scan0032 | |
| Extensive damage caused by a fan failure on chassis B.116.HL belonging to Mr. Hauvette. | 2nd Apr 1935 | Box 86 \ 5 scan0033 | |
| Failure of a fan on Chassis B.116-BL, requesting the part for examination. | 4th Apr 1935 | Box 86 \ 5 scan0034 | |
| Letter concerning a broken fan on Chassis B.II6.BL, discussing the analysis of damaged parts and the fitting of a replacement. | 8th Apr 1935 | Box 86 \ 5 scan0035 | |
| Request to expedite the supply of larger pulleys for fan destruction tests. | 11th Apr 1935 | Box 86 \ 5 scan0036 | |
| Bentley fan failure tests, requesting a solid aluminium bronze bracket for further analysis. | 11th Apr 1935 | Box 86 \ 5 scan0037 | |
| Request to build a Bentley fan flange with aluminium blades for mechanical strength testing. | 27th Apr 1935 | Box 86 \ 5 scan0038 | |
| Balancing of fans, highlighting issues with breakages on the Bentley fan. | 3rd May 1935 | Box 86 \ 5 scan0039 | |
| Breakage during Bentley Fan Failure Tests, requesting modified trunnion housings. | 3rd May 1935 | Box 86 \ 5 scan0040 | |
| The dynamic re-balancing of chassis fans and the ordering of a special machine. | 14th May 1935 | Box 86 \ 5 scan0041 | |
| Investigation into a fractured engine fan failure on chassis B-34-AH, caused by an imbalance. | 24th May 1935 | Box 86 \ 5 scan0042 | |
| Proposal to circulate a Depot Sheet for Bentley vehicles regarding fan balance checks and improvements to the fan spindle and blade riveting. | 24th May 1935 | Box 86 \ 5 scan0043 | |
| Bentley fan balance issues and the circulation of a depot sheet to prevent failures. | 28th May 1935 | Box 86 \ 5 scan0044 | |
| Enamelling and fitting of a Bentley Aluminium bladed fan. | 29th May 1935 | Box 86 \ 5 scan0045 | |
| Failure tests conducted on Bentley fans to ascertain the cause of failures on customer cars. | 29th May 1935 | Box 86 \ 5 scan0046 | |
| Series of fan failure tests caused by deliberate imbalance. | 29th May 1935 | Box 86 \ 5 scan0047 | |
| Conclusions and recommendations drawn from observations of fan fractures to prevent future failures. | 29th May 1935 | Box 86 \ 5 scan0048 | |
| Blueprint diagram of a Bentley Fan Spindle showing fracture points and suggested design modifications. | 29th May 1935 | Box 86 \ 5 scan0049 | |
| Diagram showing the method of locking a trunnion housing on a Bentley fan. | 28th May 1935 | Box 86 \ 5 scan0050 | |
| Responding to a report of an unbalanced fan on Chassis B-34-AH, discussing production timelines and requesting the fan be returned for examination. | 30th May 1935 | Box 86 \ 5 scan0051 | |
| Depot sheet instruction regarding Bentley fan failures and the method for correction by balancing. | 4th Jun 1935 | Box 86 \ 5 scan0052 | |
| Depot sheet regarding Bentley fan failures and checking cars with suspected unbalanced fans. | 6th Jun 1935 | Box 86 \ 5 scan0053 | |
| Listing Bentley chassis numbers fitted with fans that may require attention due to being unbalanced. | 4th Jun 1935 | Box 86 \ 5 scan0054 | |
| Requesting to swap a special lightened fan from car 2-B-IV with a standard fan. | 27th Jun 1935 | Box 86 \ 5 scan0055 | |
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