| Description | Date | Identifier | |
| Instructions for rebuilding a Bentley III bump chassis. | 11th Oct 1936 | Box 119 \ 1 scan0144 | |
| Plan to fit rear dampers to the Wraith Bumper Chassis after front-end testing. | 14th Oct 1938 | Box 119 \ 1 scan0145 | |
| Crack found on an engine support bracket for a Wraith Bumper Chassis after testing. | 26th Oct 1938 | Box 119 \ 1 scan0146 | |
| Photograph of a bracket removed from a Wraith bumper chassis. | 26th Oct 1938 | Box 119 \ 1 scan0147 | |
| Cracks found on the Front Engine Suspension Brackets for the Bentley III Bumper Chassis. | 26th Oct 1938 | Box 119 \ 1 scan0148 | |
| Photograph showing two cracked brackets removed from a Bentley III bumper chassis. | 8th Nov 1938 | Box 119 \ 1 scan0149 | |
| Request to fit new interleaving for the springs of a B.III BUMP chassis. | 8th Nov 1938 | Box 119 \ 1 scan0150 | |
| Requesting the current specifications for a portable arc welder to ensure power supply adequacy in the Bump House. | 9th Nov 1938 | Box 119 \ 1 scan0151 | |
| Requesting an immediate order for a Wraith Frame Cruciform member from supplier Rubery Owen. | 10th Nov 1938 | Box 119 \ 1 scan0152 | |
| Weakness in the rear springs of the Bentley III Bumper Chassis and a proposed fix. | 10th Nov 1938 | Box 119 \ 1 scan0153 | |
| Requesting the fitting of a new cross for the Wraith Bump Chassis. | 11th Nov 1938 | Box 119 \ 1 scan0154 | |
| Request to order a B.50 frame for the bump chassis with specified material thicknesses. | 24th Nov 1938 | Box 119 \ 1 scan0155 | |
| Specification list for rebuilding the front end of a B.V. Bump Chassis. | 28th Nov 1938 | Box 119 \ 1 scan0156 | |
| Order from Firth's for one pair of rear road springs for a B.V. Bumper Chassis. | 29th Nov 1938 | Box 119 \ 1 scan0157 | |
| The decision not to run dampers with balanced valves on the rear of a Wraith Bumper Chassis. | 8th Dec 1938 | Box 119 \ 1 scan0158 | |
| Instruction to fit two new silentbloc bushes to the yokes of a Bentley V Bumper Chassis. | 29th Dec 1938 | Box 119 \ 1 scan0159 | |
| Investigation into a fractured O.S. rear damper lever from a Wraith Bumper Chassis. | 6th Jan 1939 | Box 119 \ 1 scan0160 | |
| Instructing the shop to fit a new welded front pan to the Wraith Bumper Chassis following a 50-hour bump test. | 7th Jan 1939 | Box 119 \ 1 scan0161 | |
| Request to issue instructions to build up aluminium front shock damper cases for the Bentley V bumper chassis. | 7th Jan 1939 | Box 119 \ 1 scan0162 | |
| To order front road springs for a Wraith Bumper Chassis. | 11th Jan 1939 | Box 119 \ 1 scan0163 | |
| Request to test a spotwelded steering box bracket on the test rig. | 11th Jan 1939 | Box 119 \ 1 scan0164 | |
| Request to prepare a Bentley V Bumper Chassis for a brake torque rig demonstration. | 12th Jan 1939 | Box 119 \ 1 scan0165 | |
| Cracked R.H. End Plate and sheared bolts from a Wraith III Bumper Chassis rear axle test. | 14th Jan 1939 | Box 119 \ 1 scan0166 | |
| Photograph of a cracked end plate of a Wraith III rear axle centre case. | 14th Jan 1939 | Box 119 \ 1 scan0167 | |
| Photograph displaying sheared end plate bolts and their associated nuts. | 18th Jan 1939 | Box 119 \ 1 scan0168 | |
| Request to the Pattern Shop for a stained wooden box cover for a newly constructed accelerometer. | 18th Jan 1939 | Box 119 \ 1 scan0169 | |
| Suitability of bump testing for spot-welded components on the Wraith Bumper Chassis. | 18th Jan 1939 | Box 119 \ 1 scan0170 | |
| Cracked welded steel pan on a Wraith Bumper Chassis during testing. | 13th Jan 1939 | Box 119 \ 1 scan0171 | |
| Revisions and specifications for a Bentley V Bumper Chassis. | 19th Jan 1939 | Box 119 \ 1 scan0172 | |
| List of required modifications and checks for vehicle suspension and frame components. | 19th Jan 1939 | Box 119 \ 1 scan0173 | |
| Specification document for building a bumper chassis. | 23th Jan 1939 | Box 119 \ 1 scan0174 | |
| Laboratory report on the failure of an O.S. Rear Damper Lever from a Wraith Bumper Chassis. | 31th Jan 1939 | Box 119 \ 1 scan0175 | |
| Laboratory report on a failed O.S. rear damper lever from a Wraith Bumper Chassis. | 31th Jan 1939 | Box 119 \ 1 scan0176 | |
| Laboratory report cover with two microphotographs of a Wraith Bumper Chassis rear damper lever. | 31th Jan 1939 | Box 119 \ 1 scan0177 | |
| Urging the completion of a slow Bentley Bump Chassis rebuild for important bump tests. | 11th Feb 1939 | Box 119 \ 1 scan0178 | |
| The failure of an experimental spot-welded front pan on a Wraith Bumper Chassis during testing. | 15th Feb 1939 | Box 119 \ 1 scan0179 | |
| Confirmation of instruction to cease bump testing on a Wraith frame due to a welded front pan failure. | 23th Feb 1939 | Box 119 \ 1 scan0180 | |
| Requesting the build-up of a new steering gear for the B.V. Bumper Chassis. | 24th Feb 1939 | Box 119 \ 1 scan0181 | |
| 46-hour bump test of a Wraith Bumper Chassis rear end, detailing a stud failure. | 25th Feb 1939 | Box 119 \ 1 scan0182 | |
| The failure of studs on a Wraith Bumper Chassis rear end after a 46-hour test. | 25th Feb 1939 | Box 119 \ 1 scan0183 | |
| The failure of pressed steel upper triangle levers on a Bentley V Bump Chassis. | 6th Mar 1939 | Box 119 \ 1 scan0184 | |
| Requesting the rebuild of a Wraith III Bump Chassis to make it movable. | 8th Mar 1939 | Box 119 \ 1 scan0185 | |
| Requesting the build-up of the front end for the Wraith Bumper Chassis. | 9th Mar 1939 | Box 119 \ 1 scan0186 | |
| Attached photograph showing a support rubber engine mounting on a Bentley III Bumper Chassis after testing. | 20th Mar 1939 | Box 119 \ 1 scan0187 | |
| Photograph showing two views of a flexible mounting component. | 22th Mar 1939 | Box 119 \ 1 scan0188 | |
| The bumping test of welded components for the Wraith Bumper Chassis. | 22th Mar 1939 | Box 119 \ 1 scan0189 | |
| Test report on the Bentley V Bumper Chassis after 50 hours of running, detailing component failures and recommendations. | 24th Mar 1939 | Box 119 \ 1 scan0190 | |
| Test report detailing the failure of a front roll bar and outlining future investigations for other components. | 24th Mar 1939 | Box 119 \ 1 scan0191 | |
| Internal memorandum requesting the ordering of various road springs for Bentley cars. | 31th Mar 1939 | Box 119 \ 1 scan0192 | |
| Investigation into the cause of failure for three broken main leaves from a Bentley Bumper Chassis. | 31th Mar 1939 | Box 119 \ 1 scan0193 | |
| Failure of a front anti-roll rod on a Bentley V Bumper Chassis. | 3rd Apr 1939 | Box 119 \ 1 scan0194 | |
| Photograph showing a fractured front anti-roll rod. | 12th Apr 1939 | Box 119 \ 1 scan0195 | |
| Requesting to fit lightened levers to the rear shock dampers on a Bentley Bumper Chassis. | 12th Apr 1939 | Box 119 \ 1 scan0196 | |
| Request to fit a new Firth rear road spring to a Bentley V. Bump Chassis. | 13th Apr 1939 | Box 119 \ 1 scan0197 | |
| Internal memorandum requesting the construction of wooden shelves for material storage at Bumper House. | 8th May 1939 | Box 119 \ 1 scan0198 | |
| Requesting to scrap the Phantom III bump chassis. | 9th May 1939 | Box 119 \ 1 scan0199 | |
| Laboratory report on the rear road springs of a Bentley Bumper Chassis, concluding manufacturing methods led to defects. | 11th May 1933 | Box 119 \ 1 scan0200 | |
| Laboratory examination report on failed rear road springs from a Bentley Bumper Chassis. | 11th May 1939 | Box 119 \ 1 scan0201 | |
| Examination report on a failed spring, including micro-examination, hardness tests, conclusions, and a note on the investigation. | 11th May 1939 | Box 119 \ 1 scan0202 | |
| Laboratory report page with photographs showing the fracture and inner surface roughness of a 9hr spring. | 11th May 1939 | Box 119 \ 1 scan0203 | |
| Laboratory report showing micrographs of pits and decarburisation on the inner surface of a spring. | 11th Jun 1939 | Box 119 \ 1 scan0204 | |
| Laboratory report showing the appearance of a fractured 13 hrs. spring. | 11th May 1939 | Box 119 \ 1 scan0205 | |
| Laboratory report with two microscopic images showing an oxidised seam in a spring at different magnifications. | 11th May 1939 | Box 119 \ 1 scan0206 | |
| Laboratory report cover showing a photomicrograph of decarburisation on a spring. | 11th May 1939 | Box 119 \ 1 scan0207 | |
| Request for blueprints for a drilling machine handle for use in the Bump Test House. | 25th May 1939 | Box 119 \ 1 scan0208 | |
| Request to fit a new Toledo Woodhead spring to the near side of the bump chassis. | 8th Jun 1939 | Box 119 \ 1 scan0209 | |
| Inquiry to Croft Engineering Co. about a suitable variable speed pulley drive for two test rigs. | 19th Jun 1939 | Box 119 \ 1 scan0210 | |
| Request to remove, clean, and crack test 1% chromium yokes from a B.V. bump chassis. | 21th Jun 1939 | Box 119 \ 1 scan0211 | |
| Requesting the inspection of yokes and lower levers on a 'Bump Chassis B.V.' for cracks. | 21th Jun 1939 | Box 119 \ 1 scan0212 | |
| Quotation letter from Crofts (Engineers) Ltd. for a horizontal open type variable speed gear. | 23th Jun 1939 | Box 119 \ 1 scan0213 | |
| Quotation from Crofts (Engineers) Ltd. for a 25' size horizontal open type variable speed gear. | 23th Jun 1939 | Box 119 \ 1 scan0214 | |
| Leaflet detailing the specifications, diagrams, and operating instructions for variable speed gears. | 23th Jun 1939 | Box 119 \ 1 scan0215 | |
| Leaflet detailing the dimensions and specifications for Crofts Standard Design Variable Speed Gears. | 1st May 1938 | Box 119 \ 1 scan0216 | |
| Leaflet detailing standard shaft extensions for Crofts Variable Speed Gears. | 1st May 1938 | Box 119 \ 1 scan0217 | |
| Requested modifications to a shock damper indicator rig. | 28th Jun 1939 | Box 119 \ 1 scan0218 | |
| The specifications for building a Wraith 80 bump chassis for the Experimental Department. | 30th Jun 1939 | Box 119 \ 1 scan0219 | |
| Daily report on a frame test where front wheels were run on a dynamometer, detailing component failures over time. | 10th Sep 1913 | Box 119 \ 2 scan0001 | |
| The results of frame fracture tests conducted on a dynamometer. | 11th Sep 1913 | Box 119 \ 2 scan0002 | |
| Results and analysis of vehicle frame stress tests. | 12th Sep 1913 | Box 119 \ 2 scan0003 | |
| Experimental frame testing, tyre options, and maintaining consistent weight on test vehicles. | 26th Sep 1913 | Box 119 \ 2 scan0004 | |
| List of results from dynamometer bump tests on various vehicle frames. | 26th Sep 1913 | Box 119 \ 2 scan0005 | |
| Frame test conducted by bumping the front wheels, detailing a chronological list of component failures. | 26th Sep 1913 | Box 119 \ 2 scan0006 | |
| Test report on experimental front springs and frame durability, concluding that heat treatment was the reason for a longer life. | 1st May 1914 | Box 119 \ 2 scan0007 | |
| The life of springs during bumping tests. | 1st May 1914 | Box 119 \ 2 scan0008 | |
| Test results sheet for springs, detailing failures and test durations. | 27th Nov 1913 | Box 119 \ 2 scan0009 | |
| Log sheet detailing test results for front springs, showing failure times and break descriptions. | 15th Jan 1914 | Box 119 \ 2 scan0010 | |
| Test report detailing the results of endurance tests on springs. | 15th Jan 1914 | Box 119 \ 2 scan0011 | |
| Test report log for springs, detailing failure results, test durations, and reference numbers. | 15th Jan 1914 | Box 119 \ 2 scan0012 | |
| Test report detailing the breakage results and lifespan of vehicle springs. | 27th May 1914 | Box 119 \ 2 scan0013 | |
| Test report on the life of front springs during bumping tests. | 27th May 1914 | Box 119 \ 2 scan0014 | |
| Test report sheet for front springs made from Woodhead's steel, detailing test duration and results. | 1st May 1920 | Box 119 \ 2 scan0015 | |
| Comparison of the average life before breakage for front springs made from different types of steel. | 26th May 1914 | Box 119 \ 2 scan0016 | |
| The life of front springs during bumping tests. | 26th May 1914 | Box 119 \ 2 scan0017 | |
| Results of bumping tests on front springs. | 26th May 1914 | Box 119 \ 2 scan0018 | |
| The life of various front springs subjected to bumping tests. | 26th May 1914 | Box 119 \ 2 scan0019 | |
| Test results and average life before breakage for front springs. | 26th May 1914 | Box 119 \ 2 scan0020 | |
| The life of 2¼ inch springs during bumping tests. | 29th Apr 1914 | Box 119 \ 2 scan0021 | |
| Life of spring clips during bumping tests. | 11th May 1914 | Box 119 \ 2 scan0022 | |
| Test results log for near and off side spring clips, detailing running time and failures. | 11th May 1914 | Box 119 \ 2 scan0023 | |
| Test report detailing the breakage results and average life of spring clips. | 30th Apr 1914 | Box 119 \ 2 scan0024 | |
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