| Description | Date | Identifier | |
| Letter from J. & E. Hall, Ltd. explaining a delay in sending proposals and providing a new timeline. | 18th May 1934 | Box 151 \ 3 scan0307 | |
| Letter from J. & E. Hall, Ltd. declining a proposal for the special design of a refrigerating plant. | 12th Jul 1934 | Box 151 \ 3 scan0308 | |
| Letter from J. & E. HALL, LTD discussing the difficulties and costs of a plant system. | 12th Jul 1934 | Box 151 \ 3 scan0309 | |
| Letter from J. & E. Hall, Ltd. discussing proposals for an insulated chamber for the Engine Test Department. | 12th Jul 1934 | Box 151 \ 3 scan0310 | |
| Proposal outlining the necessity of a cold chamber for the Experimental Department, detailing various unresolved cold-weather vehicle failures. | 15th Mar 1935 | Box 151 \ 3 scan0311 | |
| Use of a cold chamber as a silent room and attaching its specifications for reconsideration. | 15th Mar 1935 | Box 151 \ 3 scan0312 | |
| Proposal from J. & E. Hall Ltd. for a cold chamber plant. | 18th Mar 1935 | Box 151 \ 3 scan0313 | |
| Cold starting tests performed on a Phantom III chassis in an ice room. | 14th Nov 1935 | Box 151 \ 3 scan0314 | |
| Withdrawing a request for heating equipment to avoid further delay in acquiring a Cold Chamber. | 18th Nov 1935 | Box 151 \ 3 scan0315 | |
| The urgent need for a freezing chamber to develop cold starting capabilities. | 19th Nov 1935 | Box 151 \ 3 scan0316 | |
| Cold starting tests performed on a Phantom III chassis in an ice room. | 14th Nov 1935 | Box 151 \ 3 scan0317 | |
| Request to place an order for cold chamber equipment for the Experimental Department. | 4th Feb 1938 | Box 151 \ 3 scan0318 | |
| List of exclusions, payment terms, delivery details, and electrical component specifications for a works project. | 4th Feb 1936 | Box 151 \ 3 scan0319 | |
| Changes to the construction and insulation specifications for an experimental cold chamber. | 6th Aug 1936 | Box 151 \ 3 scan0320 | |
| Summary of prices for a refrigerating plant and a request to adjust an order based on an amended quotation. | 1st Jan 1932 | Box 151 \ 3 scan0321 | |
| Bulletin for Ross Refrigerating Units, from Ross Heater & Mfg. Co., Inc. | 1st Jan 1932 | Box 151 \ 3 scan0322 | |
| Technical bulletin describing the Ross Refrigerating Unit, including a flow diagram. | 1st Jan 1932 | Box 151 \ 3 scan0323 | |
| Photographs and specifications for a 25-Ton and a 180-Ton Refrigeration Unit. | 26th Aug 1937 | Box 151 \ 3 scan0324 | |
| Request to obtain 2-5 gallons of Sheel-Hall refrigeration lubricating oil for the experimental department's cold chamber engine. | 26th Aug 1937 | Box 151 \ 3 scan0325 | |
| Request to obtain six coats with specific features for use in the cold chamber. | 2nd Sep 1937 | Box 151 \ 3 scan0326 | |
| Return of a blue sample coat to Gardiner & Company after inspection. | 2nd Sep 1937 | Box 151 \ 3 scan0327 | |
| Letter concerning the return of a sample donkey coat and a forthcoming order. | 2nd Sep 1937 | Box 151 \ 3 scan0328 | |
| Letter to J. & E. Hall Ltd. concerning frosting and icing on a Compound Vertical NH3 Compressor. | 25th Oct 1937 | Box 151 \ 3 scan0329 | |
| Letter discussing the lack of frosting or ice, suggesting an abnormal leak in a rotary plug. | 25th Oct 1937 | Box 151 \ 3 scan0330 | |
| Cold starting issues on a Phantom III car, attributing the problem to engine oil and comparing performance with other test cars. | 29th Oct 1937 | Box 151 \ 3 scan0331 | |
| Urgent request to fit a fan dynamo coupling with new bushes and pins for the cold chamber. | 12th Nov 1937 | Box 151 \ 3 scan0332 | |
| Requesting modifications to an experimental cold chamber to prevent water splashing and freezing. | 19th Nov 1937 | Box 151 \ 3 scan0333 | |
| Letter to The Laycock Engineering Co. Ltd. acknowledging instructions for hoist maintenance. | 19th Nov 1937 | Box 151 \ 3 scan0334 | |
| Cold chamber starting issues with the Phantom III silent tappet mechanism. | 11th Dec 1937 | Box 151 \ 3 scan0335 | |
| Cold chamber starting tests for Phantom III, 25/30, and Bentley models using various oils. | 10th Dec 1937 | Box 151 \ 3 scan0336 | |
| Engine R.P.M. tests conducted with various oil types at low temperatures. | 10th Dec 1937 | Box 151 \ 3 scan0337 | |
| Engine start test results at low temperatures using different oils with the clutch disengaged. | 10th Dec 1937 | Box 151 \ 3 scan0338 | |
| Cold starting test for a Phantom III production chassis using Mobiloil Arctic. | 10th Dec 1937 | Box 151 \ 3 scan0339 | |
| Chassis cold starting test results using Arctic Mobiloil and Castrol CW.20. | 10th Dec 1937 | Box 151 \ 3 scan0340 | |
| Test log sheet for chassis cold starting performance using Castrol AA and Shell Light oils at various temperatures. | 10th Dec 1937 | Box 151 \ 3 scan0341 | |
| Record of cold starting tests for a 5.B.IV chassis using Duckham's and Castrol oils. | 10th Dec 1937 | Box 151 \ 3 scan0342 | |
| Test log documenting cold starting performance with Mobiloil Arctic and Castrol X.L. at various temperatures. | 14th Dec 1937 | Box 151 \ 3 scan0343 | |
| Request to rig up a Wraith engine with a dynamo charging apparatus for testing in the cold chamber. | 14th Dec 1937 | Box 151 \ 3 scan0344 | |
| The continuous operation of the fan in the Experimental Department's Cold Chamber. | 22th Dec 1937 | Box 151 \ 3 scan0345 | |
| Phantom 111 starting mechanism's performance in freezing chamber conditions versus domestic conditions. | 22th Dec 1937 | Box 151 \ 3 scan0346 | |
| A misdiagnosis of an engine fault, clarifying the real issue may be with the valves, not the starter motor. | 17th Dec 1937 | Box 151 \ 3 scan0347 | |
| Cold starting issues with the Phantom III starting mechanism, specifically automatic tappets and gear ratios. | 17th Dec 1937 | Box 151 \ 3 scan0348 | |
| Investigation into the cause of poor starting on the Phantom III, particularly in hot weather due to an over-rich mixture and fuel flooding. | 21th Dec 1937 | Box 151 \ 3 scan0349 | |
| Test report on carburetter taper packing and its effect on engine performance on gradients. | 21th Dec 1937 | Box 151 \ 3 scan0350 | |
| Letter to Delco-Remy & Hyatt regarding cold starting tests and the failure of rubbing blocks. | 24th Dec 1937 | Box 151 \ 3 scan0351 | |
| Starting performance of 4¼-litre Bentleys and the use of thin oils in cold weather. | 5th Jan 1938 | Box 151 \ 3 scan0352 | |
| Starting difficulties with 4 1/4-Litre Bentleys and the advisability of using thinner oil for customers. | 8th Jan 1938 | Box 151 \ 3 scan0353 | |
| The starting troubles of 4 1/4 Litre Bentley cars, referencing specific complaints from a customer. | 12th Jan 1938 | Box 151 \ 3 scan0354 | |
| Defective starter motor and the conclusion that troubles are due to low battery from being parked in winter. | 12th Jan 1938 | Box 151 \ 3 scan0355 | |
| Starting troubles on the Phantom III model and proposing modifications. | 13th Jan 1938 | Box 151 \ 3 scan0356 | |
| Investigation into poor starting (startability) issues on the Phantom III model due to flooding. | 14th Jan 1938 | Box 151 \ 3 scan0357 | |
| Test report on engine starting performance on gradients with different under-bonnet temperatures and carburetter settings. | 14th Jan 1936 | Box 151 \ 3 scan0358 | |
| Delay in resolving starting troubles on the Phantom III model due to waiting for carburetter parts. | 21th Jan 1938 | Box 151 \ 3 scan0359 | |
| Reports on Wraith starting experiments, coil casing materials, and plug gaps. | 4th Feb 1938 | Box 151 \ 3 scan0360 | |
| Cold start tests conducted on the Wraith car to identify and resolve issues compared to the Bentley model. | 4th Feb 1938 | Box 151 \ 3 scan0361 | |
| The policy for changing batteries on models, with a specific comment on the Wraith battery. | 4th Feb 1938 | Box 151 \ 3 scan0362 | |
| Cold starting tests for the Wraith engine, comparing its performance with Bentley and other models. | 4th Mar 1938 | Box 151 \ 3 scan0363 | |
| Cold starting tests comparing different batteries and ignition coils on various chassis, concluding with a recommendation. | 4th Feb 1938 | Box 151 \ 3 scan0364 | |
| Comparison of engine torque between Bentley and Wraith models. | 4th Feb 1938 | Box 151 \ 3 scan0365 | |
| Battery comparison test report for various car models under cold conditions. | 4th Feb 1938 | Box 151 \ 3 scan0366 | |
| Comparison of cold start tests between the Wraith and Bentley engines. | 4th Feb 1938 | Box 151 \ 3 scan0367 | |
| Comparison of battery performance data, concluding on their suitability for the Wraith model. | 4th Feb 1938 | Box 151 \ 3 scan0368 | |
| Report comparing engine starting performance between Wraith and 25/30 chassis with different ignition coils and batteries. | 4th Feb 1938 | Box 151 \ 3 scan0369 | |
| Development of an automatic starting system for the Wraith model, including choke and carburettor options. | 22th Feb 1938 | Box 151 \ 3 scan0370 | |
| Complaint about the untidy and damaged state of the Experimental Cold Chamber after use. | 20th Jun 1938 | Box 151 \ 3 scan0371 | |
| Requesting an order of 4 fuses for the central control panel of the cold chamber. | 23th Jun 1938 | Box 151 \ 3 scan0372 | |
| Proposing safety regulations for men working on aero engine starting in the Cold Room. | 5th Feb 1940 | Box 151 \ 3 scan0373 | |
| Regulations for the use of a refrigerator chamber. | 8th Feb 1940 | Box 151 \ 3 scan0374 | |
| Cleanliness of the Cold Chamber and a threat to blacklist testers who do not clean up. | 8th Feb 1940 | Box 151 \ 3 scan0375 | |
| Letter from Rotol Airscrews requesting to use a cold chamber to test the effects of differential contraction on magnesium airscrew blades. | 15th Feb 1940 | Box 151 \ 3 scan0376 | |
| Continuation sheet of a letter from Rotol Airscrews Limited requesting assistance and comments. | 11th Feb 1940 | Box 151 \ 3 scan0377 | |
| Cross-section drawing of a Blade and Adaptor Assembly for a hydraulic airscrew. | 11th Feb 1940 | Box 151 \ 3 scan0378 | |
| Letter to Rotol Airscrews Ltd. regarding the capabilities of a Cold Chamber for temperature testing airscrew blades and hubs. | 16th Feb 1940 | Box 151 \ 3 scan0379 | |
| Letter from Rotol Airscrews Limited regarding assistance in testing blade root and adaptor parts. | 5th Mar 1940 | Box 151 \ 3 scan0380 | |
| Letter from Rotol Airscrews Limited arranging a cold chamber test for a dummy blade root and adaptor. | 11th Mar 1940 | Box 151 \ 3 scan0381 | |
| Letter to Rotol Airscrews Ltd. confirming availability for cold chamber tests. | 13th Mar 1940 | Box 151 \ 3 scan0382 | |
| Request for a cold chamber test to measure oil circulation time at 0 degrees C, and a review of cylinder wear records. | 18th Mar 1940 | Box 151 \ 3 scan0383 | |
| Letter from Rotol Airscrews arranging a visit to test a shrunk-on blade root adaptor. | 20th Mar 1940 | Box 151 \ 3 scan0384 | |
| Requesting the installation of emergency lighting in the cold room for safety during air raids. | 7th Jan 1941 | Box 151 \ 3 scan0385 | |
| Provision of blueprints for front shock damper gland rubbers for the Senior Range. | 23th Jan 1940 | Box 151 \ 3 scan0386 | |
| Specification sheet detailing shock damper displacements for various models. | 23th Feb 1940 | Box 151 \ 3 scan0387 | |
| Specification sheet for a rear damper, page 2. | 23th Feb 1940 | Box 151 \ 3 scan0388 | |
| Design error with the twin valve front dampers and proposing modifications. | 24th Mar 1941 | Box 151 \ 3 scan0389 | |
| Hydraulic shock absorbers from Alexander McNab and the potential for their manufacture. | 4th Jan 1932 | Box 152 \ 1 scan0001 | |
| Non-spring loaded gland design for a shock damper to reduce cost and save space. | 13th Jan 1932 | Box 152 \ 1 scan0002 | |
| Request for a few dozen sample Delco shock absorber glands for experimental trials. | 22th Mar 1932 | Box 152 \ 1 scan0003 | |
| Providing a sketch and further description of the latest Delco Shock Absorber Valve from America. | 8th Apr 1932 | Box 152 \ 1 scan0004 | |
| Blueprint diagram and functional description of a Delco valve with variable spring pressure. | 4th Apr 1932 | Box 152 \ 1 scan0005 | |
| Effectiveness and features of a Bentley & Draper shock absorber. | 4th Apr 1932 | Box 152 \ 1 scan0006 | |
| Description of the Bentley & Draper shock damper. | 4th Apr 1932 | Box 152 \ 1 scan0007 | |
| The method to prevent oil leakage and the material composition of a cylinder casting. | 5th Apr 1932 | Box 152 \ 1 scan0008 | |
| Blueprint of the Bentley & Draper Shock Damper. | 5th Apr 1932 | Box 152 \ 1 scan0009 | |
| Poor performance and design of Bentley-Draper Hydraulic shock dampers. | 16th Apr 1932 | Box 152 \ 1 scan0010 | |
| Letter to Lucas Ltd. discussing the adoption of Luvax shock absorbers, comparing spring loaded and orifice type controls. | 12th May 1932 | Box 152 \ 1 scan0011 | |
| Letter to Lucas Ltd. regarding the development of Luvax and N.P. type shock absorbers. | 18th May 1932 | Box 152 \ 1 scan0012 | |
| Letter from Joseph Lucas Ltd. regarding the sending of blueprints and acknowledging a previous letter. | 18th May 1932 | Box 152 \ 1 scan0013 | |
| Confirming six Gland Packings are being sent to stores for despatch to Mr. Day for inspection. | 2nd Jun 1932 | Box 152 \ 1 scan0014 | |
| The analysis of Delco shock absorber gland material and proposing tests on a similar design for the J.III damper. | 2nd Jun 1932 | Box 152 \ 1 scan0015 | |
| Promotional brochure for the McNab Rotor Hydraulic Shock Absorber. | 7th Jul 1932 | Box 152 \ 1 scan0016 | |
| Promotional leaflet detailing the features and function of the McNAB Rotor Hydraulic Shock Absorber. | 8th Jun 1932 | Box 152 \ 1 scan0017 | |
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