| Description | Date | Identifier | |
| Brake test results for a starter motor. | 2nd Feb 1922 | Box 35 \ 4 scan 098 | |
| Brake test report for a Goshawk starter motor. | 2nd Feb 1922 | Box 35 \ 4 scan 099 | |
| Brake test results for a Goshawk starter motor. | 2nd Feb 1922 | Box 35 \ 4 scan 100 | |
| Brake test results for an R.R. Goshawk 2 starter motor with brushes 75% advanced. | 22th Feb 1922 | Box 35 \ 4 scan 101 | |
| Brake test report for a R.R. Goshawk starter motor with brushes 75% advanced. | 22th Feb 1922 | Box 35 \ 4 scan 102 | |
| Brake test results for an R.R. Goshawk starter motor with brushes fully advanced. | 24th Feb 1922 | Box 35 \ 4 scan 103 | |
| Brake test results for a R.R. Goshawk starter motor with brushes fully advanced. | 24th Feb 1922 | Box 35 \ 4 scan 104 | |
| Brake test results for an RR. Goshawk starter motor. | 27th Feb 1922 | Box 35 \ 4 scan 105 | |
| Brake test report for an RR Goshawk starter motor. | 9th Mar 1922 | Box 35 \ 4 scan 106 | |
| Test results for a torque of 66 lb inches under various conditions. | 16th Mar 1914 | Box 35 \ 4 scan 107 | |
| Use of an existing crankshaft diameter and balance weights, weighing advantages against the risk of torsional vibration. | 16th Mar 1914 | Box 35 \ 4 scan 108 | |
| Graph showing the brake efficiency and performance characteristics of a Zenith starter motor during a brake test. | 3rd May 1921 | Box 35 \ 4 scan 109 | |
| Blank graph for plotting Starter Motor Brake Efficiency and performance characteristics. | 7th Mar 1922 | Box 35 \ 4 scan 110 | |
| Brake test of a starter motor. | 7th Mar 1922 | Box 35 \ 4 scan 111 | |
| Brake test report for a Goshawk starter motor. | 7th Mar 1922 | Box 35 \ 4 scan 112 | |
| Brake test results for a Goshawk starter motor with brushes 3° advanced. | 9th Mar 1922 | Box 35 \ 4 scan 113 | |
| Brake test report for a Goshawk starter motor. | 11th Mar 1922 | Box 35 \ 4 scan 114 | |
| Record of tests carried out on a Goshawk motor, detailing brush position adjustments and results. | 5th Mar 1922 | Box 35 \ 4 scan 115 | |
| Instructions detailing points to be noted in the production of R.R.S. motors. | 25th Mar 1922 | Box 35 \ 4 scan 116 | |
| List of instructions regarding the insulation and connections of brushes, terminals, and field coils. | 25th Mar 1922 | Box 35 \ 4 scan 117 | |
| Table listing the dynamo, motor, and battery specifications for various Goshawk chassis. | 26th Apr 1922 | Box 35 \ 4 scan 118 | |
| Bench test results for the R.R. Goshawk starter motor. | 14th Jul 1922 | Box 35 \ 4 scan 119 | |
| Comparing the performance of different starter motors for the Goshawk engine. | 14th Jul 1922 | Box 35 \ 4 scan 120 | |
| Graph of speed-torque and ampere-torque curves for R.R. CAV and Lucas starter motors for the Goshawk chassis. | 14th Nov 1932 | Box 35 \ 4 scan 121 | |
| Mostly blank document with a 'Print Room' date stamp. | 19th Jul 1929 | Box 35 \ 4 scan 122 | |
| Proposal to make and test a Goshawk dynamo and starter motor with solid field poles. | 14th Jul 1922 | Box 35 \ 4 scan 123 | |
| Satisfactory performance and efficiency of the Goshawk starter motor compared to competitors. | 27th Jul 1932 | Box 35 \ 4 scan 124 | |
| Specification for the inspection and testing of a Goshawk starter motor. | 19th Aug 1922 | Box 35 \ 4 scan 125 | |
| Procedure for conducting a light test on a motor to check mechanical friction and magnetic circuit integrity. | 19th Aug 1922 | Box 35 \ 4 scan 126 | |
| Procedure detailing the 'Load Test' (Test 2) for a motor. | 19th Aug 1922 | Box 35 \ 4 scan 127 | |
| Continued page of a technical document explaining the effects of circuit resistance and bad magnetic circuits on motor speed during testing. | 19th Aug 1922 | Box 35 \ 4 scan 128 | |
| Test procedures for an intermittent load test and inspection notes for motor commutators and brushes. | 19th Aug 1922 | Box 35 \ 4 scan 129 | |
| Electrical insulation breakdown and resistance testing procedures. | 19th Aug 1922 | Box 35 \ 4 scan 130 | |
| From EFC to Mr. Brock requesting the weights of various components for the R.R. Goshawk starter motor. | 20th Nov 1922 | Box 35 \ 4 scan 131 | |
| Production test checklist for a Goshawk starter motor. | 20th Nov 1922 | Box 35 \ 4 scan 132 | |
| Recommending the replacement of the Bendix starter motor pinion with a superior Bijur type for the Goshawk project. | 12th Dec 1922 | Box 35 \ 4 scan 133 | |
| Intense testing procedure for an altered Goshawk starter motor. | 15th Dec 1922 | Box 35 \ 4 scan 134 | |
| Confirming the arrangement to mark dynamos and motors on experimental Goshawk chassis. | 7th Dec 1922 | Box 35 \ 4 scan 135 | |
| Adoption of the Bijur Bendix starter motor for a 20 HP engine. | 12th Dec 1922 | Box 35 \ 4 scan 136 | |
| Examination report on a faulty starter motor from car 2G-II, detailing the issues found and the repairs made. | 23th Apr 1923 | Box 35 \ 4 scan 137 | |
| Brake test report for a Standard Goshawk starter motor. | 26th Apr 1923 | Box 35 \ 4 scan 138 | |
| Investigation into the suitability of adapting a Goshawk starter motor to an E.A.C. engine, with related E.M.F. calculations. | 5th May 1923 | Box 35 \ 4 scan 139 | |
| Calculations and considerations regarding polar flux density for Goshawk and E.A.C. motors. | 5th May 1923 | Box 35 \ 4 scan 140 | |
| Motor flux density and its effect on performance, with calculations for a Goshawk motor. | 5th May 1923 | Box 35 \ 4 scan 141 | |
| Calculations and discussion on the number of conductors required for E.A.C. and Goshawk starter motors. | 30th Apr 1923 | Box 35 \ 4 scan 142 | |
| Calculations for an E.A.C. starter motor based on given data. | 30th Apr 1923 | Box 35 \ 4 scan 143 | |
| Page of calculations for an electric motor, including flux, conductors, and EMF. | 30th Apr 1923 | Box 35 \ 4 scan 144 | |
| Calculations for the resistance and cross-sectional area of an armature turn. | 30th Apr 1923 | Box 35 \ 4 scan 145 | |
| Page of calculations for slot and teeth dimensions, including area, depth and width. | 30th Apr 1923 | Box 35 \ 4 scan 146 | |
| Table of calculations for the ampere turns necessary to produce the required magnetic flux. | 30th Apr 1923 | Box 35 \ 4 scan 147 | |
| Page of calculations for field winding resistance, cross-sectional area, and equivalent wire gauge. | 30th Apr 1923 | Box 35 \ 4 scan 148 | |
| Calculations for adapting a Goshawk size starter motor for an E.A.C. engine. | 30th Apr 1923 | Box 35 \ 4 scan 149 | |
| Page of calculations relating to useful flux per pole and the number of conductors. | 30th Apr 1923 | Box 35 \ 4 scan 150 | |
| Performance graph showing the brake efficiency characteristics of a standard starter motor for the R.R Goshawk engine. | 12th Feb 1925 | Box 35 \ 4 scan 151 | |
| Blank document page with a date stamp and a handwritten reference number. | 12th Feb 1925 | Box 35 \ 4 scan 152 | |
| Trouble with starter motor pole stampings on the 20 HP chassis. | 18th Nov 1925 | Box 35 \ 4 scan 153 | |
| Confirming there are no electrical objections to using thinner stampings for the HE 20 HP starter motor. | 18th Nov 1925 | Box 35 \ 4 scan 154 | |
| Table of chassis starter rolling condition figures for the 20 HP model, comparing Standard, Lucas, and C.A.V. motors. | 23th May 1927 | Box 35 \ 4 scan 155 | |
| Calculations for a 20 HP starter motor. | 4th Jul 1928 | Box 35 \ 4 scan 156 | |
| Cross-reference note for correspondence regarding the 20 HP starter motor. | 1st Dec 1925 | Box 35 \ 4 scan 157 | |
| Cover letter enclosing a circular and pamphlet for a Tungstone Accumulator and requesting an opinion on it. | 1st Dec 1925 | Box 35 \ 4 scan 158 | |
| Advertisement and trade notice for the Tungstone Accumulator, detailing product specifications, performance, and price/discount conditions. | 4th Dec 1925 | Box 35 \ 4 scan 159 | |
| Tungstone accumulators and postponing investigation pending further reports. | 4th Dec 1925 | Box 35 \ 4 scan 160 | |
| Correspondence with the Tungstone Accumulator Co. Ltd. regarding battery life and performance testing. | 9th Dec 1925 | Box 35 \ 4 scan 161 | |
| Request to obtain a single cell from a Tungstone battery for examination due to its unique construction. | 15th Dec 1925 | Box 35 \ 4 scan 162 | |
| Letter forwarding a reply from the Tungstone Accumulator Co. for consideration. | 21th Dec 1925 | Box 35 \ 4 scan 163 | |
| Letter to Tungstone Accumulator Co. Ltd. requesting a sample battery cell for examination. | 16th Dec 1925 | Box 35 \ 4 scan 164 | |
| Letter from Tungstone Accumulator Co. Ltd. offering a 12-volt battery on loan for practical testing. | 18th Dec 1925 | Box 35 \ 4 scan 165 | |
| Correspondence regarding the potential testing of a Tungstone accumulator battery. | 22th Dec 1925 | Box 35 \ 4 scan 166 | |
| Continued memorandum page discussing the desired behavior of a component, comparing it to a water tank. | 22th Dec 1925 | Box 35 \ 4 scan 167 | |
| 2-volt Tungstone Accumulator cell received on loan. | 31th Dec 1925 | Box 35 \ 4 scan 168 | |
| Instructions for the re-examination of a Tungstone cell, detailing its disadvantages in weight and dimensions. | 18th Jan 1926 | Box 35 \ 4 scan 169 | |
| Instructions regarding the estimated weight, dimensions, and internal resistance of a battery cell. | 5th Dec 1922 | Box 35 \ 4 scan 170 | |
| Instructions and results for a Tungstone cell capacity test. | 20th Jan 1926 | Box 35 \ 4 scan 171 | |
| The disadvantages of a Tungstone sample cell, focusing on its weight, dimensions, and potential for leakage. | 20th Jan 1926 | Box 35 \ 4 scan 172 | |
| Technical analysis of battery cell leakage, performance, and design considerations. | 20th Jan 1926 | Box 35 \ 4 scan 173 | |
| Continued memorandum on the testing of a new battery cell against standard cells, noting its unsuitable weight and dimensions. | 20th Jan 1926 | Box 35 \ 4 scan 174 | |
| Promotional letter from Tungstone Accumulator Co., Ltd. regarding their batteries for car lighting and starting. | 25th Jan 1926 | Box 35 \ 4 scan 175 | |
| Requesting an opinion on Tungstone Accumulators. | 26th Jan 1926 | Box 35 \ 4 scan 176 | |
| From EFC to AJB detailing the disadvantages and advantages of the Tungstone Battery. | 27th Jan 1926 | Box 35 \ 4 scan 177 | |
| Correspondence with Tungstone Accumulator Co. Ltd. regarding their Tungstone Cell battery. | 2nd Feb 1926 | Box 35 \ 4 scan 178 | |
| Letter from a battery supplier discussing the weight, dimensions, and construction of their accumulator. | 29th Jan 1926 | Box 35 \ 4 scan 179 | |
| Letter from Tungstone Accumulator Co., Ltd. concerning battery leakage and specifications for 20 HP cars. | 2nd Feb 1926 | Box 35 \ 4 scan 180 | |
| Instruction sheet detailing the results of a capacity test on a Tungstone cell. | 2nd Feb 1926 | Box 35 \ 4 scan 181 | |
| Testing and durability of a Tungstone Cell from the Tungstone Accumulator Company. | 6th Feb 1926 | Box 35 \ 4 scan 182 | |
| Article reprinted from 'The Motor' magazine detailing the testing of a new design of Tungstone accumulator battery. | 26th Jan 1926 | Box 35 \ 4 scan 183 | |
| Leakage test conducted on a Tungstone Bell cell. | 11th Feb 1926 | Box 35 \ 4 scan 184 | |
| Instruction sheet detailing the failure of a Tungstone cell due to badly buckled plates, deeming it useless. | 20th Apr 1926 | Box 35 \ 4 scan 185 | |
| The return of a faulty sample Tungstone cell due to buckled positive plates. | 23th Apr 1926 | Box 35 \ 4 scan 186 | |
| Instructions detailing the re-examination of a Tungstone Cell, noting its construction and issues with loose negative plates. | 7th Jun 1926 | Box 35 \ 4 scan 187 | |
| The approximate weight of a 12-volt battery and its crate. | 9th Dec 1924 | Box 35 \ 4 scan 188 | |
| The examination and return of a faulty Tungstone cell. | 10th Jun 1926 | Box 35 \ 4 scan 189 | |
| Letter from The Chloride Electrical Storage Company regarding Tungstone Accumulator's claims about pure lead plate grids. | 17th Sep 1926 | Box 35 \ 4 scan 190 | |
| Letter discussing the materials and construction of accumulator grids, comparing pure lead, antimonial lead, and the Tungstone accumulator. | 18th Sep 1926 | Box 35 \ 4 scan 191 | |
| Letter discussing the comparative performance of battery cells, mentioning tests on separators, plates, and leakage. | 20th Sep 1926 | Box 35 \ 4 scan 192 | |
| Letter from Chloride Electrical Storage Co. Ltd. discussing the composition of Tungstone accumulator grids and plates. | 20th Sep 1926 | Box 35 \ 4 scan 193 | |
| Letter to Mr. E.C. McKinnon clarifying a misunderstanding about the material composition of lead accumulator grids. | 21th Sep 1926 | Box 35 \ 4 scan 194 | |
| Letter from The Chloride Electrical Storage Company Limited clarifying a misunderstanding regarding the term 'pure lead' for Tungstone Accumulator components. | 22th Sep 1926 | Box 35 \ 4 scan 195 | |
| Letter to Mr. E.C. McKinnon of The Chloride Elec. Storage Co. Ltd. regarding a misunderstanding about the Tungstone Battery. | 23th Sep 1926 | Box 35 \ 4 scan 196 | |
| List of points on why the Tungstone battery is considered inferior to other makes. | 17th Sep 1928 | Box 35 \ 4 scan 197 | |
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