| Description | Date | Identifier | |
| Cooling system inefficiencies, electrolytic corrosion, and potential design improvements for radiators. | 21th Aug 1929 | Box 15 \ 1 Scan144 | |
| Page from a typed report discussing radiator and filter performance. | 21th Aug 1929 | Box 15 \ 1 Scan145 | |
| Instructions on cleaning a radiator with Kleanwell Solution and a warning about its corrosive effect on aluminium. | 21th Aug 1929 | Box 15 \ 1 Scan146 | |
| Comparing different cooling system radiator designs regarding gap size, area, and hydraulic mean depth. | 24th Aug 1929 | Box 15 \ 1 Scan147 | |
| Aspects of radiator design, including the top tank, tubes, and shutter control. | 30th Aug 1929 | Box 15 \ 1 Scan148 | |
| Hydraulic resistance and choking issues in F2B, S.S., and V series radiator cooling systems. | 30th Aug 1929 | Box 15 \ 1 Scan149 | |
| Radiator obstruction, comparing F2B series cars with V series cars, and the role of the aluminium head. | 30th Aug 1939 | Box 15 \ 1 Scan150 | |
| Dimensional drawing for V Series, F2B Series, and S.S. Chassis components. | 30th Aug 1939 | Box 15 \ 1 Scan151 | |
| Radiator corrosion and cooling system water treatment for the 40/50 HP 'J-2' Series Chassis. | 31th Aug 1929 | Box 15 \ 1 Scan152 | |
| Standardisation of wider gap radiator tubes to reduce blockage in service. | 16th Aug 1929 | Box 15 \ 1 Scan153 | |
| Customer complaints and overheating issues related to radiators. | 27th Sep 1929 | Box 15 \ 1 Scan154 | |
| Radiator design alterations due to corrosion issues from aluminium cylinder heads. | 28th Sep 1929 | Box 15 \ 1 Scan155 | |
| Series of radiator tests for the Phantom II model. | 28th Sep 1929 | Box 15 \ 1 Scan156 | |
| Comparison of cooling performance and silting for two different diameter radiator matrix tubes. | 4th Oct 1929 | Box 15 \ 1 Scan157 | |
| Persistent choked radiator issue on chassis 56-WR belonging to H. Mills. | 4th Oct 1929 | Box 15 \ 1 Scan158 | |
| Letter of complaint from a customer regarding a persistently overheating vehicle. | 30th Sep 1929 | Box 15 \ 1 Scan159 | |
| Use of Staybright and Chromium finishes for various car parts, particularly the radiator. | 4th Oct 1929 | Box 15 \ 1 Scan160 | |
| Cross-sectional drawing, designated Section T.T., of a mechanical component with various dimensions. | 6th Nov 1929 | Box 15 \ 1 Scan161 | |
| Sketch comparing the top tank outlet areas to the matrix for the Phantom I and Phantom II models. | 6th Dec 1929 | Box 15 \ 1 Scan162 | |
| Scheme for thermostatically operated radiator shutters and requesting a new design for the 20 HP chassis. | 5th Oct 1929 | Box 15 \ 1 Scan163 | |
| 'SS. Radiator Filter' and an associated drawing, Lec. 2753. | 14th Oct 1929 | Box 15 \ 1 Scan164 | |
| List of recommended improved parts for the Phantom II model. | 15th Oct 1929 | Box 15 \ 1 Scan165 | |
| Report page discussing potential modifications to luggage grids, radiator filters, central lubrication, and shock absorbers. | 15th Oct 1929 | Box 15 \ 1 Scan166 | |
| Issues with shock absorber joints, load, and wear rates. | 26th Oct 1929 | Box 15 \ 1 Scan167 | |
| Requesting to test a frame with great vertical stiffness to improve radiator steadiness and steering. | 26th Oct 1929 | Box 15 \ 1 Scan168 | |
| Issue of radiator silting and proposing a meeting to determine further preventative action. | 11th Nov 1929 | Box 15 \ 1 Scan169 | |
| The silting up of radiators, proposing a switch to cast iron heads on the Phantom II. | 14th Nov 1929 | Box 15 \ 1 Scan170 | |
| Instruction to stop work on Phantom II thermostatically operated radiator shutters due to a supply issue. | 22th Nov 1929 | Box 15 \ 1 Scan171 | |
| New, cleanable radiator design for testing. | 25th Nov 1929 | Box 15 \ 1 Scan172 | |
| Conference decision to instruct 40/50 HP chassis users to add Sodium Phosphate to their radiator systems. | 26th Nov 1929 | Box 15 \ 1 Scan173 | |
| Requesting the correct chemical symbol and weight for Sodium Phosphate to be used in radiator cooling water. | 26th Nov 1929 | Box 15 \ 1 Scan174 | |
| Specifications and required alterations for Phantom II radiators. | 3rd Dec 1929 | Box 15 \ 1 Scan175 | |
| Tests to determine the effects of outlet pipe restriction on radiator cooling efficiency. | 7th Dec 1929 | Box 15 \ 1 Scan176 | |
| Radiator silting and water loss in Phantom II cars, recommending a change to the red warning light's operating temperature. | 7th Dec 1929 | Box 15 \ 1 Scan177 | |
| Tests comparing radiator performance with a 33% Glycerine and water mixture versus pure water during hill climbing and high-speed driving. | 12th Dec 1929 | Box 15 \ 1 Scan178 | |
| Radiator jellying and the proposed stiffening of the Phantom II frame. | 18th Dec 1929 | Box 15 \ 1 Scan179 | |
| Responding to a query about radiator jellying and confirming that drawings for an approved proposal will be sent soon. | 20th Dec 1929 | Box 15 \ 1 Scan180 | |
| List of information required on the existing water system for a Phantom II steam cooling installation. | 23th Dec 1929 | Box 15 \ 1 Scan181 | |
| The shipment of Sylphon tubes for Phantom II radiator thermostats. | 23th Dec 1929 | Box 15 \ 1 Scan182 | |
| Letter from Rolls Royce of America confirming an order for six thermostat assemblies from The Fulton Sylphon Company. | 9th Dec 1929 | Box 15 \ 1 Scan183 | |
| Testing the force required to operate radiator shutters and proposing geometry changes. | 24th Dec 1929 | Box 15 \ 1 Scan184 | |
| Corroded and leaking aluminium tubes in Phantom cylinder heads, suggesting trials of different materials and anodical treatment. | 27th Dec 1929 | Box 15 \ 1 Scan185 | |
| Proposal and cost for experimenting with square tube radiators on the Phantom II. | 31th Dec 1929 | Box 15 \ 1 Scan186 | |
| Issues with cylinder head tubes and the detrimental effects of using Sodium Phosphate in the radiator. | 1st Jan 1930 | Box 15 \ 1 Scan187 | |
| Loss of water issue and cylinder head tube trouble on chassis 56-WR, suspected to be caused by excessive Sodium Phosphate. | 1st Jan 1930 | Box 15 \ 1 Scan188 | |
| Dissatisfaction with the 'wingle guide' for the Phantom radiator shutter thermostat and proposing a new double guide design. | 1st Jan 1930 | Box 15 \ 1 Scan189 | |
| Cancelling a modification to the radiator inlet flange due to leaks caused by back pressure. | 3rd Jan 1930 | Box 15 \ 1 Scan190 | |
| Request to modify an obsolete radiator from flow tests for a Phantom II test car. | 6th Jan 1930 | Box 15 \ 1 Scan191 | |
| Blueprint detailing a light radiator for an experimental test. | 16th Jan 1930 | Box 15 \ 1 Scan192 | |
| Heavily faded document page with a purple ink stamp from the printing department. | 16th Jan 1930 | Box 15 \ 1 Scan193 | |
| Tests conducted on water pump cavitation for radiators. | 10th Jan 1930 | Box 15 \ 1 Scan194 | |
| Report page detailing the function and limitations of a radiator's cooling cycle, including cavitation. | 10th Jan 1930 | Box 15 \ 1 Scan195 | |
| Analysis of radiator performance, hydraulic resistance, and cooling system limitations for the Phantom II. | 10th Jan 1930 | Box 15 \ 1 Scan196 | |
| Engine cooling circulation issues, radiator choking, and potential solutions. | 10th Jan 1930 | Box 15 \ 1 Scan197 | |
| Report summarizing radiator design test results, including comparisons with Chrysler, cavitation findings, and shutter weight. | 10th Jan 1930 | Box 15 \ 1 Scan198 | |
| Comparative table of radiator specifications. | 13th Jan 1930 | Box 15 \ 1 Scan199 | |
| Tests conducted on the Phantom II water cooling system to determine the effect of temperature and restriction. | 13th Jan 1930 | Box 15 \ 1 Scan200 | |
| Engine cooling system performance, focusing on cavitation and pressure effects from a restriction valve. | 13th Jan 1930 | Box 15 \ 1 Scan201 | |
| Graph showing the effect of temperature and restriction on water flow and suction side depression in a Phantom II cooling system. | 13th Jan 1930 | Box 15 \ 1 Scan202 | |
| Graph showing pressure in the Phantom II cooling system against engine RPM with different nozzle and valve configurations. | 22th Jan 1930 | Box 15 \ 1 Scan203 | |
| Graph showing water flow and suction side depression for a Phantom II cooling system with varying temperatures and nozzle restrictions. | 13th Jan 1931 | Box 15 \ 1 Scan204 | |
| Graph showing the effect of temperature and a restricted delivery nozzle on water flow for a Phantom II cooling system. | 14th Jan 1930 | Box 15 \ 1 Scan205 | |
| Requesting modifications to the Phantom II thermo-operated shutters. | 14th Jan 1930 | Box 15 \ 1 Scan206 | |
| Requesting the results of an investigation into a 'jellying' issue on a Trials Sedanca car. | 21th Jan 1930 | Box 15 \ 1 Scan207 | |
| Short trial of the 20/60 Vauxhall, focusing on radiator wobble and engine smoothness. | 27th Jan 1930 | Box 15 \ 1 Scan208 | |
| Radiator movement and frame rigidity in relation to the steering box and front spring shackles. | 1st Jan 1930 | Box 15 \ 1 Scan209 | |
| Potential solutions to a radiator shimmy problem on Phantom models. | 1st Jan 1930 | Box 15 \ 1 Scan210 | |
| Design revisions to the radiator, bonnet, and dash for Sir Henry Segrave's Phantom II. | 31th Jan 1930 | Box 15 \ 1 Scan211 | |
| Modified dashboard shape for Continental Touring Cars. | 2nd Feb 1930 | Box 15 \ 1 Scan212 | |
| Tabular record of test times, part numbers, and gap sizes for various chassis. | 2nd Feb 1930 | Box 15 \ 1 Scan213 | |
| Radiator cooling performance, including frontal area, bonnet ventilation, and fan specifications. | 4th Feb 1930 | Box 15 \ 1 Scan214 | |
| Solution for radiator jellying on the 40/50 chassis using a Diabolo rubber support. | 5th Feb 1930 | Box 15 \ 1 Scan215 | |
| Issues with the Phantom II radiator filler cap seal and proposing modifications. | 7th Feb 1930 | Box 15 \ 1 Scan216 | |
| Blueprint showing a modification for a Phantom II radiator filler cap. | 10th Feb 1930 | Box 15 \ 1 Scan217 | |
| Design of the bonnet and radiator for the Phantom model. | 10th Feb 1930 | Box 15 \ 1 Scan218 | |
| Modifications to radiator and bonnet design, referencing the 'Segrave Experiment'. | 10th Feb 1930 | Box 15 \ 1 Scan219 | |
| Causes of radiator shimmy on the Phantom II, evaluating suspension options and suggesting experiments. | 10th Feb 1930 | Box 15 \ 1 Scan220 | |
| Proposed modification to a chassis to cure radiator shimmy, including a sketch. | 11th Feb 1930 | Box 15 \ 1 Scan221 | |
| Use of harder rubber for semi-isolation pieces to address radiator shimmy. | 11th Feb 1930 | Box 15 \ 1 Scan222 | |
| Revised bonnet and dash design for the Phantom II, including radiator modifications. | 13th Feb 1930 | Box 15 \ 1 Scan223 | |
| Various schemes to cure 'radiator jellying', requesting sketches for a single point body mounting solution. | 15th Feb 1930 | Box 15 \ 1 Scan224 | |
| Tests for a problem known as 'frame jellying', focusing on shock absorber mounting. | 15th Feb 1930 | Box 15 \ 1 Scan225 | |
| Outlining the methods of observation used to study the phenomenon of 'frame jellying'. | 19th Feb 1930 | Box 15 \ 1 Scan226 | |
| Analysis of 'frame jellying' and 'high speed wobble' through stationary and road tests. | 19th Feb 1930 | Box 15 \ 1 Scan227 | |
| Analysis of chassis frame twisting, radiator movement during 'jellying', and the effect of the frame on wobbles. | 19th Feb 1930 | Box 15 \ 1 Scan228 | |
| The effect of shock damper loading and experiments to alter frame periodicity to reduce chassis 'jellying'. | 19th Feb 1930 | Box 15 \ 1 Scan229 | |
| Experiments with body attachments, sub-frame mounting, and damping characteristics. | 19th Feb 1930 | Box 15 \ 1 Scan230 | |
| Experiments to improve steering and reduce wobble by altering the front axle assembly. | 19th Feb 1930 | Box 15 \ 1 Scan231 | |
| Summary of efforts to cure a chassis 'jellying' problem by exploring different methods of damping. | 19th Feb 1930 | Box 15 \ 1 Scan232 | |
| Note on fitting spare wheels and adding damping between the scuttle and dash. | 19th Feb 1930 | Box 15 \ 1 Scan233 | |
| Blueprint of a test rig and recording apparatus for measuring radiator movement. | 20th Feb 1930 | Box 15 \ 1 Scan234 | |
| Heavily faded document with a purple 'PRINT ROOM' stamp in the top left corner. | 20th Feb 1930 | Box 15 \ 1 Scan235 | |
| Design for an improved bonnet and dashboard for the Phantom II, referencing Sir Henry Segrave's car. | 27th Feb 1930 | Box 15 \ 1 Scan236 | |
| Tenth report of the design committee discussing frame jellying, rear axle failure, and battery recharging capacity. | 5th Mar 1930 | Box 15 \ 1 Scan237 | |
| Testing and investigation into a frame and radiator 'jellying' vibration issue. | 12th Mar 1930 | Box 15 \ 1 Scan238 | |
| Explanation of measurements from various test curves related to engine mounting and frame vibration. | 17th Mar 1930 | Box 15 \ 1 Scan239 | |
| Bumper tests measuring the relative amplitude of movement of the radiator and engine. | 17th Mar 1930 | Box 15 \ 1 Scan240 | |
| Proposed modified bonnet, radiator, and dash for two car models. | 14th Mar 1930 | Box 15 \ 1 Scan241 | |
| Depot sheet concerning the corrosion of aluminium cylinder head tubes and the recommendation for their replacement. | 21th Mar 1930 | Box 15 \ 1 Scan242 | |
| Fifteenth design committee report discussing the Phantom oil filter and radiator mounting, and a compression ignition unit. | 21th Mar 1930 | Box 15 \ 1 Scan243 | |
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