| Description | Date | Identifier | |
| List describing various fan designs and modifications tested, with their corresponding diameters. | 19th Mar 1925 | Box 75 \ 3 scan0061 | |
| Bench experiments conducted on EAC radiator fans. | 20th Mar 1925 | Box 75 \ 3 scan0062 | |
| The performance and design of various engine fans based on test results. | 20th Mar 1925 | Box 75 \ 3 scan0063 | |
| Fan modifications and the resulting power-thrust curves. | 20th Mar 1925 | Box 75 \ 3 scan0064 | |
| Fan blade curvature, performance, and selecting an optimal fan speed ratio. | 1st Mar 1925 | Box 75 \ 3 scan0065 | |
| Continuation discussing engine cooling fan and belt drive ratios. | 20th Mar 1925 | Box 75 \ 3 scan0066 | |
| Suggesting a new standard for a fan based on drive ratio improvements. | 25th Sep 1924 | Box 75 \ 3 scan0067 | |
| Graph comparing the speed, power, and axial thrust for various standard and experimental fan designs. | 18th Mar 1925 | Box 75 \ 3 scan0068 | |
| Graph comparing thrust and power consumption against fan speed for various fan designs. | 19th Mar 1925 | Box 75 \ 3 scan0069 | |
| Graph comparing the performance of a standard 40/50 fan against an experimental E.A.C. fan. | 27th Mar 1925 | Box 75 \ 3 scan0070 | |
| Graph comparing the speed, power, and axial thrust of a Standard Type 3A and an Experimental Type 10A EAC fan. | 10th Feb 1925 | Box 75 \ 3 scan0071 | |
| Table of ratios for 20 HP fans, showing fan speeds corresponding to various thrusts. | 10th Feb 1925 | Box 75 \ 3 scan0072 | |
| Data table of fan speeds corresponding to various thrusts for different fan models. | 10th Feb 1925 | Box 75 \ 3 scan0073 | |
| Development and testing of different engine fan models and their respective drive ratios. | 20th Mar 1925 | Box 75 \ 3 scan0074 | |
| Table of experimental fan results, comparing thrust, power, and thrust/power ratios at two different speeds. | 10th Mar 1925 | Box 75 \ 3 scan0075 | |
| Performance data sheet comparing test results for Fan No. 1 and Fan No. 15. | 23th Mar 1925 | Box 75 \ 3 scan0076 | |
| Technical memorandum discussing the driving radius of a V-belt for the engine fan and experimental belt ratios. | 23th Mar 1925 | Box 75 \ 3 scan0077 | |
| And finalising new experimental fan ratios. | 24th Mar 1925 | Box 75 \ 3 scan0078 | |
| The repetition of fan tests comparing a modified EFC fan against the standard R-R fan. | 25th Mar 1925 | Box 75 \ 3 scan0079 | |
| Design considerations for radiator fans to improve efficiency and reliability. | 31th Mar 1925 | Box 75 \ 3 scan0080 | |
| Request to produce experimental fan sets with higher speed ratios. | 2nd Apr 1925 | Box 75 \ 3 scan0081 | |
| Requesting the production of one set of fan parts, a blade and a flange, based on provided blueprints. | 24th Apr 1925 | Box 75 \ 3 scan0082 | |
| Experimental variations for the Phantom radiator fan to improve power-thrust and cooling. | 18th Jul 1930 | Box 75 \ 3 scan0083 | |
| Instruction from Mr. Royce to test if a three-bladed radiator fan performs as well as a six-bladed one for the 20 HP chassis. | 5th Jun 1919 | Box 75 \ 3 scan0084 | |
| Extract detailing the assembly of parts for chassis 1.E.X. | 30th Jun 1919 | Box 75 \ 3 scan0085 | |
| Test results comparing 3 and 6 blade fans, measuring water and air temperatures under various speed and road conditions. | 14th Jan 1919 | Box 75 \ 3 scan0086 | |
| Performance test data from a hill climb at Tucknall Hill, comparing different fan blade configurations. | 4th Jul 1919 | Box 75 \ 3 scan0087 | |
| Tests on a 40/50 chassis comparing a fan fitted with 3 blades against the standard 6-bladed fan. | 26th Nov 1919 | Box 75 \ 3 scan0088 | |
| Test results for maximum temperatures during hill climb and level running with 3-bladed and 6-bladed fans. | 26th Nov 1919 | Box 75 \ 3 scan0089 | |
| Required number of fan blades and a request to remove three from a trials car. | 4th Dec 1919 | Box 75 \ 3 scan0090 | |
| Extract from a report on vehicle 2.EX detailing dynamo and fan belt adjustments and battery maintenance. | 11th Feb 1920 | Box 75 \ 3 scan0091 | |
| Complaint regarding unsatisfactory Whittle belts causing noise and clearance issues on the dynamo and fan drives. | 9th Sep 1920 | Box 75 \ 3 scan0092 | |
| Test report on special fan belts, questioning whether to revert to the original Whittle belt due to potential scrap costs of £1000. | 25th Oct 1920 | Box 75 \ 3 scan0093 | |
| The unsatisfactory performance of fan belts composed of leather and grey fibre links, noting elongation, breakage and vibration issues. | 20th Oct 1920 | Box 75 \ 3 scan0094 | |
| Condemning the use of Whittle type fan belts with fibre inserts due to noise and risk of breakage. | 28th Oct 1920 | Box 75 \ 3 scan0095 | |
| Replacing problematic fibre-wearing link belts with Whittle belts for fan and dynamo drives due to vibration issues. | 20th Oct 1920 | Box 75 \ 3 scan0096 | |
| Comparison of different belts and arranging to sell condemned stock. | 29th Oct 1920 | Box 75 \ 3 scan0097 | |
| Suggestion to test a fan pulley made from a new 'specialalloy' as a potential replacement for the current malleable cast iron version. | 18th Jan 1921 | Box 75 \ 3 scan0098 | |
| Schedule of performance and comparison tests for radiators and cooling fans to be conducted at Brooklands. | 12th Oct 1934 | Box 75 \ 3 scan0099 | |
| Test schedule for radiator and component testing over two days. | 12th Oct 1934 | Box 75 \ 3 scan0100 | |
| List of tests comparing bonnet temperatures, radiator matrix area, and induction pipes at various speeds. | 1st Aug 1921 | Box 75 \ 3 scan0101 | |
| Improving the 40/50 HP armoured car's cooling by experimenting with an aluminium radiator cowl. | 1st Aug 1921 | Box 75 \ 3 scan0102 | |
| Fan blades breaking in service and proposing a reinforcement piece as a solution. | 20th Oct 1921 | Box 75 \ 3 scan0103 | |
| Cover note for a standardization sheet regarding an experiment on a reinforcing plate for a fan blade. | 2nd Nov 1931 | Box 75 \ 3 scan0104 | |
| Request for costing on a standardisation sheet for a reinforcing plate on a fan blade. | 2nd Nov 1921 | Box 75 \ 3 scan0105 | |
| Cause and liability for three broken fan blades and a damaged radiator. | 15th Nov 1921 | Box 75 \ 3 scan0106 | |
| Missing standardisation sheets and scheduling a visit to Derby for Goshawk 11 tests. | 20th Dec 1921 | Box 75 \ 3 scan0107 | |
| Standardisation sheet regarding the introduction of additional parts to strengthen the Fan Blade. | 1st Jan 1922 | Box 75 \ 3 scan0108 | |
| Standardisation of a reinforcing plate for fan blades. | 2nd Nov 1921 | Box 75 \ 3 scan0109 | |
| Costing document for fitting reinforcing plates to an existing fan on a 40/50 chassis. | 30th Nov 1921 | Box 75 \ 3 scan0110 | |
| Adopting the half-link type of Whittle Belt for the fan and dynamo drive on the 40/50 chassis to eliminate a 'drumming' noise. | 21th Jul 1922 | Box 75 \ 3 scan0111 | |
| Radiator and fan specifications for cars intended for use in Switzerland and India. | 9th Oct 1922 | Box 75 \ 3 scan0112 | |
| Specifications for the 40/50 radiator and fan, including water capacity, pulley diameters, and a table of fan speeds. | 29th Sep 1923 | Box 75 \ 3 scan0113 | |
| Confirming Mr. Royce's agreement to a one-piece forging for the fan drive pivot and spindle. | 16th Oct 1923 | Box 75 \ 3 scan0114 | |
| Data sheet of test results showing the temperature of air at the rear of a fan in relation to water temperature at speeds of 25 and 45 m.p.h. | 15th Oct 1923 | Box 75 \ 3 scan0115 | |
| Suggestion to improve cooling on the 40/50 HP chassis by removing fan blades. | 26th Jun 1924 | Box 75 \ 3 scan0116 | |
| 40/50 HP chassis troubles related to belt drives. | 1st Jul 1924 | Box 75 \ 3 scan0117 | |
| Comparing the efficiency of a 6-bladed fan versus a 3-bladed fan. | 1st Jul 1924 | Box 75 \ 3 scan0118 | |
| Fan tests for car 98-NK, comparing a three-bladed fan to a standard fan. | 29th Jun 1924 | Box 75 \ 3 scan0119 | |
| Report comparing the engine temperature performance of a three-bladed fan versus a standard fan on vehicle 35-PK. | 29th Jun 1924 | Box 75 \ 3 scan0120 | |
| Engine cooling tests for a 40/50 HP engine, comparing the performance of six and three-bladed fans. | 8th Jul 1924 | Box 75 \ 3 scan0121 | |
| Temperature test results comparing a six-bladed fan and a three-bladed fan with shutters open and closed. | 8th Jul 1924 | Box 75 \ 3 scan0122 | |
| Improvements to car radiators, specifically matrix size and fan design for 20 HP and 40/50 HP models. | 29th Aug 1924 | Box 75 \ 3 scan0123 | |
| Continued discussion on engine overheating, fan efficiency, and cooling system limitations. | 9th Sep 1924 | Box 75 \ 3 scan0124 | |
| Letter to Messrs. Ogilvie & Partners requesting recommendations for a more efficient engine cooling fan for the 40/50 HP Chassis. | 9th Sep 1924 | Box 75 \ 3 scan0125 | |
| Tests conducted on 40/50 HP radiators to resolve boiling issues and compare them to Hispano models. | 11th Sep 1924 | Box 75 \ 3 scan0126 | |
| Engine fan efficiency and fan belt performance at various speeds. | 11th Sep 1924 | Box 75 \ 3 scan0127 | |
| Improving engine cooling through fan belt and bonnet ventilation enhancements. | 11th Sep 1924 | Box 75 \ 3 scan0128 | |
| Engine cooling improvements and tests related to water boiling. | 11th Sep 1924 | Box 75 \ 3 scan0129 | |
| Statement on the acceptable duration for a 20 HP or 40/50 HP car's engine to boil. | 11th Sep 1924 | Box 75 \ 3 scan0130 | |
| Bench experiments on the power required to drive a 40/50 radiator fan with six and three blades. | 18th Sep 1924 | Box 75 \ 3 scan0131 | |
| Fan power speed curves and issues with driving belt slippage at high speeds. | 18th Sep 1934 | Box 75 \ 3 scan0132 | |
| Power tests for six-blade and three-blade fans, discussing methodology and providing power-speed law formulas. | 18th Sep 1924 | Box 75 \ 3 scan0133 | |
| Report page detailing experiments on fan power, belt slip, and air stream velocity. | 18th Sep 1924 | Box 75 \ 3 scan0134 | |
| Methodology for measuring fan thrust and air velocity using a spring balance and revolving turntable. | 18th Sep 1924 | Box 75 \ 3 scan0135 | |
| Graph showing power absorbed by a 40/50 standard fan at various speeds, comparing three and six-bladed fans. | 18th Sep 1924 | Box 75 \ 3 scan0136 | |
| Graph plotting air velocity against fan speed for a 40/50 standard fan, comparing six-bladed and three-bladed versions. | 24th Sep 1924 | Box 75 \ 3 scan0137 | |
| Attaching a report from Dr. Watts of Ogilvie & Partners regarding the fan for the 40/50 HP chassis. | 24th Sep 1924 | Box 75 \ 3 scan0138 | |
| Letter from Ogilvie & Partners Ltd. detailing improvements for a 40-50 HP chassis fan. | 19th Sep 1924 | Box 75 \ 3 scan0139 | |
| Analysis of fan power in relation to speed, exploring blade design solutions like variable pitch and twisting. | 19th Sep 1924 | Box 75 \ 3 scan0140 | |
| Conclusion of a letter discussing the design limitations of a wooden screw. | 19th Nov 1924 | Box 75 \ 3 scan0141 | |
| Bench experiments on the thrust of various radiator fans at different speeds. | 19th Nov 1924 | Box 75 \ 3 scan0142 | |
| Continued technical discussion on ventilator fan tests, thrust, and cooling efficiency. | 19th Nov 1924 | Box 75 \ 3 scan0143 | |
| Analysis of radiator and fan efficiencies by combining thrust and power speed curves. | 19th Nov 1924 | Box 75 \ 3 scan0144 | |
| Comparison of the efficiency between a six-bladed fan and a three-bladed fan, referencing horsepower curves. | 19th Nov 1924 | Box 75 \ 3 scan0145 | |
| Continued report discussing fan efficiency, thrust, and power curves based on experimental data. | 19th Nov 1924 | Box 75 \ 3 scan0146 | |
| Additional notes comparing the performance and efficiency of six-bladed and three-bladed 40/50 fans. | 20th Nov 1924 | Box 75 \ 3 scan0147 | |
| Comparison of the performance of six-blader and three-blader fans, detailing experimental limitations. | 20th Nov 1924 | Box 75 \ 3 scan0148 | |
| Graph showing thrust-fan speed curves for seven different types of fans, plus a ventilator fan. | 20th Nov 1924 | Box 75 \ 3 scan0149 | |
| Graph of HP vs. Fan Speed for a standard 6-blade fan and a modified 3-blade fan. | 30th Nov 1934 | Box 75 \ 3 scan0150 | |
| Graph showing the power absorbed in horsepower versus thrust in pounds for a standard 40/50 6-bladed fan and a 3-bladed version. | 20th Nov 1924 | Box 75 \ 3 scan0151 | |
| Further bench experiments conducted on radiator fans, outlining a new apparatus arrangement. | 17th Dec 1924 | Box 75 \ 3 scan0152 | |
| Report comparing the performance and efficiency of various fans using curves representing power, thrust, and speed. | 17th Dec 1924 | Box 75 \ 3 scan0153 | |
| The performance of a four-bladed fan and plans for further modifications and experiments. | 17th Dec 1924 | Box 75 \ 3 scan0154 | |
| List of fans tested, detailing their type and fan tip diameter. | 16th Dec 1924 | Box 75 \ 3 scan0155 | |
| Graph comparing the speed, power required, and axial thrust for twelve different engine cooling fan designs. | 18th Dec 1924 | Box 75 \ 3 scan0156 | |
| Graph comparing the thrust and slip performance of various engine fan designs against engine speed. | 18th Dec 1924 | Box 75 \ 3 scan0157 | |
| Graph comparing the speed and power consumption of various fan designs against engine speed. | 18th Dec 1924 | Box 75 \ 3 scan0158 | |
| Water boiling issues, comparing a new fan design, and the effectiveness of bonnet louvres versus shutters. | 31th Dec 1924 | Box 75 \ 3 scan0159 | |
| Issues with a fan testing rig and proposing a chain drive modification to allow for more efficient testing of fan belts. | 3rd Mar 1925 | Box 75 \ 3 scan0160 | |
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