| Description | Date | Identifier | |
| Customer complaints and proposed solutions for exhaust boom issues on the Phantom II model. | 3rd Apr 1933 | Box 14 \ 6 Scan293 | |
| Request to prepare for a series of tests on the Phantom II large exhaust silencer. | 3rd Jul 1933 | Box 14 \ 6 Scan294 | |
| Power loss found in the exhaust systems for the Phantom II (8-litre). | 1st Mar 1934 | Box 14 \ 6 Scan295 | |
| Comparative test results for various exhaust systems on the Phantom II engine. | 1st Mar 1934 | Box 14 \ 6 Scan296 | |
| Analysis of power loss in various exhaust system components, comparing standard, Vokes, and large resonant silencer setups. | 1st Mar 1934 | Box 14 \ 6 Scan297 | |
| Summary report on the efficiency of a large resonant silencer compared to the production model. | 1st Mar 1934 | Box 14 \ 6 Scan298 | |
| Analysis of power loss to a large resonant exhaust system for a Phantom (8 Litre) engine. | 24th Feb 1934 | Box 14 \ 6 Scan299 | |
| Stamped document cover or reverse page from the company's print room. | 10th Apr 1934 | Box 14 \ 6 Scan300 | |
| Graph comparing the power output and back pressure of an 8-litre Phantom engine with various exhaust systems. | 26th Feb 1936 | Box 14 \ 6 Scan301 | |
| Page with a receiving stamp from the T Room in Derby. | 10th Apr 1934 | Box 14 \ 6 Scan302 | |
| Scheme for modifying the exhaust system on the 20/25 & 40/50 HP chassis. | 20th Apr 1934 | Box 14 \ 6 Scan303 | |
| Issues with exhaust systems on Terraplane mountings and evaluating alternative suspension designs. | 26th Apr 1934 | Box 14 \ 6 Scan304 | |
| The failure of the spring mounting on the 28-EX exhaust system. | 5th May 1934 | Box 14 \ 6 Scan305 | |
| Approving the standardisation of an adjustable exhaust nozzle for the 25 HP and Phantom chassis. | 7th May 1934 | Box 14 \ 6 Scan306 | |
| Solution for a one-beat exhaust noise on Phantom models by fitting an improved C.I. bend. | 9th May 1934 | Box 14 \ 6 Scan307 | |
| Standardisation of a C.I. bend for an exhaust hot spot to reduce one beat note. | 15th May 1934 | Box 14 \ 6 Scan308 | |
| Cost estimation for extra jigs, tools, equipment, and scrap related to production on the 'T' series chassis. | 15th Jun 1934 | Box 14 \ 6 Scan309 | |
| Standardisation of parts for an adjustable exhaust nozzle. | 7th Jun 1934 | Box 14 \ 6 Scan310 | |
| Estimated cost for standardizing parts fitted to the 'S' series. | 20th Jun 1934 | Box 14 \ 6 Scan311 | |
| Proposal to delete the exhaust cut-out fitting on the Phantom II chassis due to new flexible engine mountings. | 31th Aug 1934 | Box 14 \ 6 Scan312 | |
| Discontinuation of the exhaust cut-out on the Phantom II chassis due to the flexible engine mounting. | 6th Sep 1934 | Box 14 \ 6 Scan313 | |
| Standardisation of parts for a flexible exhaust mounting. | 16th Oct 1934 | Box 14 \ 6 Scan314 | |
| Note on the estimated cost of extra jigs, tools and equipment for the 'T.2' series chassis. | 7th Dec 1934 | Box 14 \ 6 Scan315 | |
| Instructions regarding new drawings for 40/50 HP Chassis exhaust fittings and silencer modifications. | 29th Jan 1935 | Box 14 \ 6 Scan316 | |
| Instruction to manufacture and fit a 40/50 HP exhaust silencer for a short type chassis. | 1st Feb 1935 | Box 14 \ 6 Scan317 | |
| Test results for Phantom II exhaust hot spot temperatures under different driving conditions. | 13th Apr 1935 | Box 14 \ 6 Scan318 | |
| Cover note regarding figures obtained for hot-spot temperatures on a Phantom exhaust. | 15th Apr 1935 | Box 14 \ 6 Scan319 | |
| Material choice and testing for Phantom II & 25/30 HP exhaust silencers. | 28th Aug 1936 | Box 14 \ 6 Scan320 | |
| Standardisation proposal for a new fan with duralumin flanges and blades to reduce weight. | 23th Sep 1926 | Box 14 \ 7 Scan001 | |
| Standardising the 40/50 HP Chassis fan with Duralumin flanges and blades following failures of the steel version. | 23th Nov 1926 | Box 14 \ 7 Scan002 | |
| Outstanding work on a car, specifically the steering, rear brake drums, and an experimental fan fitting. | 14th May 1927 | Box 14 \ 7 Scan003 | |
| Confirming a drawing for a Top Water Pipe and Fan has been attached. | 1st Jun 1928 | Box 14 \ 7 Scan004 | |
| Fan noise on the Phantom Chassis G2B series and the results of tests to resolve it. | 17th Aug 1928 | Box 14 \ 7 Scan005 | |
| Clearance of the 'SS' radiator and fan and a modification to the starting handle bracket. | 18th Oct 1928 | Box 14 \ 7 Scan006 | |
| Noting that if the 'SS' fan belt stretches it can foul controls, proposing the fan be dropped lower. | 1st Mar 1929 | Box 14 \ 7 Scan007 | |
| Drawings and parts for an 'India 4' Fan with Phantom Shaped Blades. | 10th May 1929 | Box 14 \ 7 Scan008 | |
| Request to investigate increasing the J.2 series fan diameter to improve the radiator system's cooling capacity. | 27th May 1929 | Box 14 \ 7 Scan009 | |
| Brooklands tests of a car's cooling system in response to overheating complaints with the Phantom II model. | 25th Jun 1930 | Box 14 \ 7 Scan010 | |
| Vehicle cooling system tests, focusing on ventilation and bonnet shutters to prevent overheating. | 25th Jun 1930 | Box 14 \ 7 Scan011 | |
| Engine cooling issues, recommending ventilated bonnets for cars in hot climates and discussing radiator performance. | 1st Jun 1930 | Box 14 \ 7 Scan012 | |
| Track testing, detailing oil temperature issues, petrol supply problems, and recorded lap speeds for various cars. | 25th Jun 1930 | Box 14 \ 7 Scan013 | |
| Performance tests on cars 18-EX and 19-XX, identifying the causes for the 'American car's' slow speed and noting a cylinder head failure during testing. | 25th Jun 1930 | Box 14 \ 7 Scan014 | |
| Test report on radiator and water circulation performance, including a comparison with an American Phantom II. | 25th Jun 1930 | Box 14 \ 7 Scan015 | |
| Summary of findings and proposed developments for the Phantom II concerning bonnet ventilation, fan efficiency, and radiator design. | 25th May 1930 | Box 14 \ 7 Scan016 | |
| The necessity of ventilated and louvered bonnets for cooling on high-speed Continental roads. | 25th Jun 1930 | Box 14 \ 7 Scan017 | |
| Graph showing the temperature of top water, bottom water, and oil against miles run. | 2nd Jul 1930 | Box 14 \ 7 Scan018 | |
| Blank document page with a purple ink date stamp from Derby. | 2nd Jul 1930 | Box 14 \ 7 Scan019 | |
| Graph comparing car overheating temperatures under various bonnet and undershield ventilation configurations. | 2nd Jul 1930 | Box 14 \ 7 Scan020 | |
| Graph showing top and bottom water temperatures under various bonnet configurations at 62 MPH. | 2nd Jul 1930 | Box 14 \ 7 Scan021 | |
| Graph plotting oil and top water temperature against miles run under various speed and cooling settings. | 2nd Jul 1930 | Box 14 \ 7 Scan022 | |
| Graph comparing critical atmospheric temperature for spring-tensioned versus positively tensioned fan belts at 62 MPH. | 2nd Jul 1930 | Box 14 \ 7 Scan023 | |
| Graph comparing the top water temperatures of models 19 E.X. and 18 E.X. during a test run. | 2nd Jul 1930 | Box 14 \ 7 Scan024 | |
| Blueprint diagram illustrating a modification to a front undershield to improve the cooling system. | 2nd Jul 1930 | Box 14 \ 7 Scan025 | |
| Cover page with extremely faint, illegible text and a purple date stamp. | 2nd Jul 1930 | Box 14 \ 7 Scan026 | |
| Recommendations for resolving over-heating issues on a Phantom II, including fan belt adjustment and undershield removal. | 27th Jun 1930 | Box 14 \ 7 Scan027 | |
| To a client in France with troubleshooting advice for shock absorber pressure and high engine temperatures. | 5th Jul 1930 | Box 14 \ 7 Scan028 | |
| Second report on radiator and fuel supply tests conducted at Brooklands. | 9th Jul 1930 | Box 14 \ 7 Scan029 | |
| Analysis of fuel supply issues related to vacuum pump efficiency and high temperatures. | 9th Jul 1930 | Box 14 \ 7 Scan030 | |
| Technical report on cooling system fan belt performance and mixture strength analysis. | 9th Jul 1930 | Box 14 \ 7 Scan031 | |
| Engine pre-ignition, overheating, fuel supply, and radiator performance comparisons. | 9th Jul 1930 | Box 14 \ 7 Scan032 | |
| Engine cooling circulation tests and the increase of water temperature with vehicle speed. | 9th Jul 1930 | Box 14 \ 7 Scan033 | |
| Car overheating issues, discussing the effects of driving conditions, fans, and tyres on the cooling system. | 9th Jul 1930 | Box 14 \ 7 Scan034 | |
| Recommendations for improvements to the vehicle's cooling and fuel systems, including the fan belt, autovac, radiator and fuel supply. | 9th Jul 1930 | Box 14 \ 7 Scan035 | |
| Graph and bar chart illustrating the effects of the fan, speed, and ventilation on the engine cooling system. | 2nd Jul 1930 | Box 14 \ 7 Scan036 | |
| Blank document with a date stamp from the print room. | 12th Jul 1930 | Box 14 \ 7 Scan037 | |
| Graphs showing the effect of water circulation on overheating for a 19 E.X. Car water system. | 2nd Jul 1930 | Box 14 \ 7 Scan038 | |
| Graph plotting top and bottom water temperatures against a series of seven different engine and cooling test conditions. | 2nd Jul 1930 | Box 14 \ 7 Scan039 | |
| Graph showing the effect of temperature on complete car circulation. | 12th Jul 1930 | Box 14 \ 7 Scan040 | |
| From the Print Room marked with a date stamp. | 12th Jul 1930 | Box 14 \ 7 Scan041 | |
| Car cooling issues, fan tests, and proposed improvements to the fan belt. | 9th Jul 1930 | Box 14 \ 7 Scan042 | |
| Follow-up letter discussing temperature readings, cooling system performance, water loss, and potential remedies for detonations. | 9th Jul 1930 | Box 14 \ 7 Scan043 | |
| Technical letter discussing overheating issues, brake linings, and requesting cooling system temperature data. | 9th Jul 1930 | Box 14 \ 7 Scan044 | |
| Continuation page of a document discussing atmospheric temperatures and centre point lubrication. | 9th Jul 1930 | Box 14 \ 7 Scan045 | |
| Experimental variations and road tests for the Phantom radiator fan. | 8th Jul 1930 | Box 14 \ 7 Scan046 | |
| Overheating issues and proposing to increase the 40/50 fan speed via a double pulley drive. | 13th Aug 1930 | Box 14 \ 7 Scan047 | |
| Overheating issues on the Phantom II model and proposing three modifications. | 9th Sep 1930 | Box 14 \ 7 Scan048 | |
| Ongoing tests on a Phantom II for overheating, specifically investigating the undershields. | 8th Sep 1930 | Box 14 \ 7 Scan049 | |
| Standardisation of a Goodrich endless canvas rubber fan belt to improve cooling system efficiency. | 11th Jul 1930 | Box 14 \ 7 Scan050 | |
| Modifications to the 20/25 fan drive to accommodate a deeper radiator. | 13th Jun 1931 | Box 14 \ 7 Scan051 | |
| Request for two new, stronger fan pulley springs for Diamond mounted cars. | 7th Dec 1931 | Box 14 \ 7 Scan052 | |
| The reduction of fan size on Phantom II cars after fitting a 'film' radiator. | 21th Mar 1933 | Box 14 \ 7 Scan053 | |
| Requesting parts for cooling experiments on the Phantom II model. | 23th Nov 1933 | Box 14 \ 7 Scan054 | |
| Drawing of a PII Fan Pulley, noting it is .500' smaller in diameter. | 22th Nov 1933 | Box 14 \ 7 Scan055 | |
| Two silent fan designs, LeC.3747 and LeC.3748, for trial on a 10,000 miles test car. | 1st Jan 1934 | Box 14 \ 7 Scan056 | |
| Urgent memo cancelling two Phantom II fan designs and submitting a revised design using Dural for the blades. | 15th Jan 1934 | Box 14 \ 7 Scan057 | |
| Requesting the design and construction of a variable pitch fan for the Phantom II. | 21th Jun 1934 | Box 14 \ 7 Scan058 | |
| Tests carried out on fans and a Vulture radiator at Brooklands. | 3rd Jul 1934 | Box 14 \ 7 Scan059 | |
| Radiator performance test results under various driving conditions. | 3rd Jul 1934 | Box 14 \ 7 Scan060 | |
| Test data sheet comparing cooling performance for various fan configurations at 30 MPH and 60 MPH. | 3rd Jul 1934 | Box 14 \ 7 Scan061 | |
| Conclusions on radiator tests, comparing heat dissipation and matrix area for Vulture and Spectre engines. | 3rd Jul 1934 | Box 14 \ 7 Scan062 | |
| Comparison of cooling efficiency and noise levels for different fan designs against a standard model. | 3rd Jul 1934 | Box 14 \ 7 Scan063 | |
| Graph charting the results of Phantom fan tests conducted at Brooklands Track. | 26th Jun 1934 | Box 14 \ 7 Scan064 | |
| Graph showing results of Vulture radiator tests at Brooklands Track. | 26th Jun 1934 | Box 14 \ 7 Scan065 | |
| Request to modify flexible fan blades and build them onto a hub for a 10,000-mile trial on a Phantom 28-EX. | 16th Jul 1934 | Box 14 \ 7 Scan066 | |
| Report comparing two modified Phantom fans against a standard fan for power loss, noise, and cooling efficiency. | 13th Sep 1934 | Box 14 \ 7 Scan067 | |
| Comparison document on the efficiency and performance of different cooling fans, including standard and staggered bladed types. | 13th Sep 1934 | Box 14 \ 7 Scan068 | |
| Graph comparing the cooling efficiencies of different Phantom fans. | 18th May 1934 | Box 14 \ 7 Scan069 | |
| Blank page with a 'Print Room' stamp. | 13th Sep 1934 | Box 14 \ 7 Scan070 | |
| Graph comparing power losses for different Phantom fan configurations against engine RPM. | 16th Mar 1934 | Box 14 \ 7 Scan071 | |
| Blank page stamped by the print room in Derby. | 18th Sep 1931 | Box 14 \ 7 Scan072 | |
| | | | |
