| Description | Date | Identifier | |
| Proposed permanent design of radiator shutters for the Goshawk 11, raising concerns about cooling efficiency. | 26th Jul 1922 | Box 77 \ 4 scan0252 | |
| Temporary radiator shutters being fitted to a Goshawk car. | 26th Jul 1922 | Box 77 \ 4 scan0253 | |
| Production of the Goshawk 11 radiator and the need for a shutter design for the existing model. | 27th Jul 1922 | Box 77 \ 4 scan0254 | |
| Dispatching drawings for Goshawk radiator and fan components. | 28th Jul 1922 | Box 77 \ 4 scan0255 | |
| Letter from an instrument company discussing the feasibility of a vapour tension thermostat and proposing an alternative design. | 28th Jul 1922 | Box 77 \ 4 scan0256 | |
| Cross-sectional diagram of a Samson brand regulator and valve assembly. | 1st Jan 1922 | Box 77 \ 4 scan0257 | |
| Letter from The Steam Fittings Co. regarding the production of 'Sylphon' tubes for thermostats and enclosing a drawing for a shutter regulator. | 27th Jul 1922 | Box 77 \ 4 scan0258 | |
| Blueprint of a Sylphon Thermostat for the Goshawk II engine. | 19th Jul 1922 | Box 77 \ 4 scan0259 | |
| Blueprint of a thermostat-controlled radiator louvre system. | 1st Aug 1922 | Box 77 \ 4 scan0260 | |
| Fitting of temporary and permanent radiator shutters on Goshawk cars. | 1st Aug 1922 | Box 77 \ 4 scan0261 | |
| Fitting of permanent and temporary radiator shutters on Goshawk cars. | 4th Aug 1922 | Box 77 \ 4 scan0262 | |
| Arranging for a car fitted with shutters to be examined by C.J. in London on its way to Mr. Royce. | 11th Aug 1922 | Box 77 \ 4 scan0263 | |
| Note regarding arrangements for the inspection of a Goshawk II car at either Lillie Hall or Conduit Street. | 14th Aug 1922 | Box 77 \ 4 scan0264 | |
| Options for updating the bodywork on car 4-Goshawk-11 to fit a new radiator, bonnet and dashboard. | 21th Aug 1922 | Box 77 \ 4 scan0265 | |
| Authorizing an increase in the radiator order from 50 to 100 due to delays with an improved design. | 24th Aug 1922 | Box 77 \ 4 scan0266 | |
| Extract regarding the fitting of temporary shutters to Goshawks to differentiate them from the 40/50 model. | 9th Sep 1922 | Box 77 \ 4 scan0267 | |
| Goshawk 11 engine tests of different radiator fans, pulleys, and cowlings to improve cooling. | 1st Sep 1932 | Box 77 \ 4 scan0268 | |
| Comparison of Cowhawk fans from tests measuring wind velocity at three points on a Cowhawk-11 car. | 9th Sep 1922 | Box 77 \ 4 scan0269 | |
| Sending drawings for Goshawk 11 radiator shutters. | 9th Sep 1922 | Box 77 \ 4 scan0270 | |
| Request from Mr. Royce to test the Goshawk 11 engine cowling on the road under full power with a following wind. | 14th Sep 1922 | Box 77 \ 4 scan0271 | |
| Drawings for hand-operated shutter controls for the Goshawk-11 engine. | 15th Sep 1922 | Box 77 \ 4 scan0272 | |
| Sample radiator shutter for the Goshawk 11, with suggestions for improvement. | 20th Sep 1922 | Box 77 \ 4 scan0273 | |
| The despatch of a Goshawk Radiator Shutter section to Mr. Elliott. | 20th Sep 1922 | Box 77 \ 4 scan0274 | |
| Drawing for a Goshawk hand lever for shutters. | 21th Sep 1922 | Box 77 \ 4 scan0275 | |
| From 'E.' to 'Hs.' regarding the design and production of radiator shutters for the Goshawk 11. | 30th Sep 1922 | Box 77 \ 4 scan0276 | |
| Telegram received by telephone with instructions for modifying vehicle parts. | 2nd Oct 1922 | Box 77 \ 4 scan0277 | |
| Telegram message received by telephone regarding parts for Halliday at St Pancras. | 9th Jul 1918 | Box 77 \ 4 scan0278 | |
| Telegram requesting the despatch of strip leather and castle nuts for shutter frames. | 4th Oct 1922 | Box 77 \ 4 scan0279 | |
| Telegram requesting shutter controls and associated small parts. | 22th Oct 1935 | Box 77 \ 4 scan0280 | |
| Telegram reporting that a supplied radiator is unsatisfactory and incorrectly drilled. | 22th Oct 1935 | Box 77 \ 4 scan0281 | |
| Confirmation to proceed with producing 250 sets of Goshawk 11 radiator shutters without modification. | 10th Oct 1922 | Box 77 \ 4 scan0282 | |
| Goshawk 11 fan tests measuring air velocities through the radiator at varying speeds and conditions. | 26th Oct 1922 | Box 77 \ 4 scan0283 | |
| Water temperature test results for the Goshawk 11 engine under various cooling configurations and speeds. | 26th Oct 1922 | Box 77 \ 4 scan0284 | |
| Goshawk 11 temperature test results with varying speed and cowling configurations. | 30th Oct 1922 | Box 77 \ 4 scan0285 | |
| Water temperature and velocity test results for a 3-Goshawk-11 engine. | 30th Oct 1922 | Box 77 \ 4 scan0286 | |
| Test results for an 18-inch fan with shutters closed during a throttling down test on Swinscoe Hill. | 31th Oct 1922 | Box 77 \ 4 scan0287 | |
| Test report on heat generation with performance data at half and full throttle. | 7th Nov 1922 | Box 77 \ 4 scan0288 | |
| Summary of results from air velocity tests on the fan and radiator shutters. | 9th Nov 1922 | Box 77 \ 4 scan0289 | |
| Velocity tests in ft. per min. through a radiator with and without an 18' fan cowl. | 9th Nov 1922 | Box 77 \ 4 scan0290 | |
| Fitting a prototype radiator with built-in shutters to a 20 HP experimental car. | 10th Nov 1922 | Box 77 \ 4 scan0291 | |
| From B.J. to Hs. requesting a sample of the new 20 HP radiator louvres for inspection. | 10th Nov 1922 | Box 77 \ 4 scan0292 | |
| Test results for fan, shutter, and cowl performance related to engine cooling. | 16th Nov 1922 | Box 77 \ 4 scan0293 | |
| The issues with manual radiator shutters on 20 HP cars and the cost of retrofitting thermostat control. | 20th Nov 1922 | Box 77 \ 4 scan0294 | |
| Goshawk radiator shutters, discussing hand-controlled versus thermostat-controlled systems and associated issues. | 21th Nov 1922 | Box 77 \ 4 scan0295 | |
| Testing of Goshawk radiator shutters and concerns about unexpected electrical failures. | 28th Nov 1922 | Box 77 \ 4 scan0296 | |
| Radiator shutter operation and the design of the dashboard thermometer for the 20 HP model. | 24th Nov 1922 | Box 77 \ 4 scan0297 | |
| Standardisation of chassis parts, specifically radiator shutters. | 26th Oct 1922 | Box 77 \ 4 scan0298 | |
| Improvements for the Goshawk radiator shutters, including a boiling water warning system and dial visibility. | 30th Nov 1922 | Box 77 \ 4 scan0299 | |
| Burnt exhaust valve from a Goshawk-11 engine, attributing the failure to pre-ignition from boiling water and suggesting a radiator modification. | 2nd Dec 1922 | Box 77 \ 4 scan0300 | |
| Confirming an arrangement to view the latest radiator shutters fitted to a Goshawk chassis. | 5th Dec 1922 | Box 77 \ 4 scan0301 | |
| Arrangement to examine a car fitted with a radiator with built-in shutters. | 13th Dec 1922 | Box 77 \ 4 scan0302 | |
| Magneto ignition, automatic advance, and hand control for the 20 HP engine. | 14th Dec 1922 | Box 77 \ 4 scan0303 | |
| Management of a press visit regarding a new radiator with built-in shutters. | 15th Dec 1922 | Box 77 \ 4 scan0304 | |
| Customs clearance for three 'Goshawk 11' experimental thermostats from the Fulton Co. | 2nd Jan 1923 | Box 77 \ 4 scan0305 | |
| Letter from The Fulton Company regarding charging three shutter thermostats. | 15th Dec 1922 | Box 77 \ 4 scan0306 | |
| Sales request to hide the bolt heads on the side plates of the 20 HP radiator shutters. | 9th Jan 1923 | Box 77 \ 4 scan0307 | |
| Effectiveness of louvres on the Goshawk model and proposing standardization on the 40/50 model. | 10th Jan 1923 | Box 77 \ 4 scan0308 | |
| Tests on the Goshawk bonnet, concluding that shutters are preferable to louvres for radiator ventilation. | 23th Jan 1923 | Box 77 \ 4 scan0309 | |
| Experimental thermostat for the 'Goshawk 11' and related correspondence from the Fulton Co. | 30th Jan 1923 | Box 77 \ 4 scan0310 | |
| Letter from The Fulton Company regarding the specifications and performance of three returned shutter thermostats. | 16th Jan 1923 | Box 77 \ 4 scan0311 | |
| Concluding page of a letter from The Fulton Company regarding the installation and testing of parts. | 16th Jan 1923 | Box 77 \ 4 scan0312 | |
| Design of a non-rattling cooling shutter as an alternative to louvres on the Goshawk bonnet. | 6th Feb 1923 | Box 77 \ 4 scan0313 | |
| Particulars for three types of shutter thermostats built and loaded in the U.S.A. | 1st Feb 1923 | Box 77 \ 4 scan0314 | |
| The despatch of a thermostat for fitting to a 5-Goshawk-11 car. | 1st Feb 1923 | Box 77 \ 4 scan0315 | |
| Sending a thermostat for a 5-Goshawk-11 engine and requesting feedback on its operating temperature. | 10th Feb 1923 | Box 77 \ 4 scan0316 | |
| Fitting and road testing a new thermostat for a Goshawk 11, with suggestions for design improvements. | 24th Feb 1923 | Box 77 \ 4 scan0317 | |
| Investigation into a sticking thermostat for car 5.GOS:11, identifying the cause as an eccentric lower guide which was subsequently filed for clearance. | 27th Feb 1923 | Box 77 \ 4 scan0318 | |
| Request to test a siren for the radiator steam escape pipe as a boiling water alarm. | 1st Mar 1923 | Box 77 \ 4 scan0319 | |
| Finish of radiator shutters on the 20HP model, comparing nickel silver to black enamel. | 7th Mar 1923 | Box 77 \ 4 scan0320 | |
| Information sheet detailing specifications and performance data for radiator tests. | 7th Mar 1923 | Box 77 \ 4 scan0321 | |
| Graph showing the delivery performance of a GII water pump against engine RPM. | 27th Mar 1923 | Box 77 \ 4 scan0322 | |
| The delayed implementation of an improved 20HP radiator with thermostat-operated louvres. | 27th Mar 1923 | Box 77 \ 4 scan0323 | |
| Complaint about a leaking radiator on a 20-HP car from the shutter frame's centre bolt tube. | 7th May 1923 | Box 77 \ 4 scan0324 | |
| The Goshawk 11 radiator, listing capacities and weights for the tube matrix and cylinder block. | 4th Jul 1923 | Box 77 \ 4 scan0325 | |
| Overheating test on car 73A7 where the water boiled, questioning if this is acceptable for a chassis destined for France. | 23th Jul 1923 | Box 77 \ 4 scan0326 | |
| List of questions regarding a 20-HP engine overheating issue to diagnose the cause. | 26th Jul 1923 | Box 77 \ 4 scan0327 | |
| Cooling performance of a 20 HP car, with reference to attached test results. | 27th Jul 1923 | Box 77 \ 4 scan0328 | |
| Series of five graphs showing the results of cooling tests on a 20 HP engine under various conditions. | 21th Jul 1923 | Box 77 \ 4 scan0329 | |
| Radiator tests performed on a 20-HP car during a hill climb. | 19th Jul 1923 | Box 77 \ 4 scan0330 | |
| Cover letter for a report on the cooling system of a 20 HP car, noting a previously supplied blueprint. | 27th Jul 1923 | Box 77 \ 4 scan0331 | |
| Radiator tests conducted on a 20-HP car. | 19th Jul 1923 | Box 77 \ 4 scan0332 | |
| The cooling and performance tests of a 20 HP chassis, noting issues with radiator shutters and slow speed performance. | 30th Jul 1923 | Box 77 \ 4 scan0333 | |
| Solutions for engine water boiling issues in 40/50 and Goshawk models. | 10th Aug 1923 | Box 77 \ 4 scan0334 | |
| Engine performance, Goshawk radiator shutters, and the cooling benefits of a by-pass radiator. | 11th Aug 1923 | Box 77 \ 4 scan0335 | |
| Requesting a copy of a report regarding Goshawk engine cooling, as Mr. Royce wants work done on the topic. | 11th Aug 1923 | Box 77 \ 4 scan0336 | |
| Covering note for an attached report and blueprint concerning the cooling of the 20 HP model. | 13th Aug 1923 | Box 77 \ 4 scan0337 | |
| Summary of performance tests at Brooklands for a 6-Goshawk-11 car, covering car conditions, speed work, and hill climbs. | 22th Aug 1923 | Box 77 \ 4 scan0338 | |
| Radiator tests for the 6-Goshawk-11, comparing a small and larger radiator under varying conditions. | 23th Aug 1923 | Box 77 \ 4 scan0339 | |
| Comparative table detailing the specifications of Goshawk 11, 40/50 HP, and Marmon radiators. | 14th Sep 1923 | Box 77 \ 4 scan0340 | |
| Customer request for integral radiator shutters on a 20-HP car. | 21th Sep 1923 | Box 77 \ 4 scan0341 | |
| The design of radiator shutters and louvres for the 20 HP chassis. | 30th Nov 1923 | Box 77 \ 4 scan0342 | |
| Seizure of the radiator shutter operating lever on the 20 HP model due to mud and grit. | 4th Feb 1924 | Box 77 \ 4 scan0343 | |
| Water boiling issues on 40/50 HP and 20 HP cars, comparing radiators and recommending shutters. | 1st Feb 1924 | Box 77 \ 4 scan0344 | |
| Potential solutions to water boiling issues in 40/50 HP and 20 HP cars. | 6th Feb 1924 | Box 77 \ 4 scan0345 | |
| Water boiling issues and potential solutions on 40/50 HP and 20 HP cars. | 1st Feb 1924 | Box 77 \ 4 scan0346 | |
| The seizure of the operating lever for the 20-HP radiator shutter controls and the testing of a preventative steel shield. | 8th Feb 1924 | Box 77 \ 4 scan0347 | |
| Comparing the actual capacity of thermostat and standard type 20 HP radiators. | 1st Apr 1924 | Box 77 \ 4 scan0348 | |
| Specifications for two types of 20 HP radiator, Standard and Thermostat. | 3rd Apr 1924 | Box 77 \ 4 scan0349 | |
| New 20 HP radiator with shutters, detailing mileage tests and efficiency compared to the previous model. | 4th Apr 1924 | Box 77 \ 4 scan0350 | |
| Engine water boiling issues on the 20 HP model and recommending a new radiator with thermostat-operated shutters. | 26th Apr 1924 | Box 77 \ 4 scan0351 | |
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