| Description | Date | Identifier | |
| Note confirming receipt of a Claudel Carburetter type AVT.70 from Mr. Davy. | 18th Jan 1926 | Box 42 \ 3 Scan001 | |
| New carburetter heating system from Claudel Hobson and a Bi-Fuel System. | 21th Jan 1926 | Box 42 \ 3 Scan002 | |
| Two development paths for testing the Eagle 16 engine, focusing on the blower and induction system. | 19th Feb 1926 | Box 42 \ 3 Scan003 | |
| Invoice from Messrs. H.M. Hobson Ltd. for various jets and chokes supplied for testing. | 29th Apr 1926 | Box 42 \ 3 Scan004 | |
| Carburetter selection for the F.X. engine, comparing Stromberg and Claudel-Hobson models. | 21th May 1926 | Box 42 \ 3 Scan005 | |
| Follow-up communication regarding an outstanding invoice for parts left by H.M. Hobson Ltd. | 28th May 1926 | Box 42 \ 3 Scan006 | |
| Modifications to the carburettor and induction pipe system for a Falcon 10 engine. | 3rd Jun 1926 | Box 42 \ 3 Scan007 | |
| Sketch for the stud arrangement on the Falcon.X horizontal carburetter. | 5th Jun 1926 | Box 42 \ 3 Scan008 | |
| Carburettor and induction pipe designs and placement for the Falcon 10 engine. | 7th Jun 1926 | Box 42 \ 3 Scan009 | |
| The procurement and design of carburetters for the Falcon.10 engine. | 15th Jun 1926 | Box 42 \ 3 Scan010 | |
| Progress and plans for vertical and horizontal carburettors for the Falcon.10 engine. | 15th Jun 1926 | Box 42 \ 3 Scan011 | |
| Drawing LeC.2283 for a 2.5' horizontal duplex carburetter for the Falcon engine. | 28th Aug 1926 | Box 42 \ 3 Scan012 | |
| Testing the fitting and running of new CH. AVT.64 carburetters on a Falcon X engine. | 1st Oct 1926 | Box 42 \ 3 Scan013 | |
| Test report on the Falcon X supercharger, detailing test conditions, results, and an impeller failure. | 15th Oct 1926 | Box 42 \ 3 Scan014 | |
| Supercharger impeller blade fracture during testing, noting clearances and material hardness figures. | 21th Dec 1934 | Box 42 \ 3 Scan015 | |
| Performance graph for a Falcon X Supercharger with a Claudel Hobson A.V.T. carburetter at 18,000 RPM, plotting various metrics against air flow. | 16th Oct 1926 | Box 42 \ 3 Scan016 | |
| Blank page with a red ink stamp from the Derby Print Room. | 16th Oct 1926 | Box 42 \ 3 Scan017 | |
| Performance graphs for the Falcon X Supercharger with a Claudel Hobson A.V.T. Carburetter at 20,000 RPM. | 16th Oct 1926 | Box 42 \ 3 Scan018 | |
| Heavily faded document with a red 'Print Room' stamp in the bottom right corner. | 16th Oct 1926 | Box 42 \ 3 Scan019 | |
| Invitation to Claudel Hobson Ltd. to attend carburetter tests in Derby. | 25th Oct 1926 | Box 42 \ 3 Scan020 | |
| Letter from H.M. Hobson Ltd. to E.W. Hives confirming a visit to assist with carburettor adjustments. | 26th Oct 1926 | Box 42 \ 3 Scan021 | |
| Three possible carburation systems for the F.10 engine. | 28th Oct 1926 | Box 42 \ 3 Scan022 | |
| Adjustments and modifications to the Falcon X carburettor from Claudel Hobson. | 3rd Nov 1926 | Box 42 \ 3 Scan023 | |
| Operation and advantages of annular chokes, including a diagram and reference to testing on the Falcon X engine. | 11th Nov 1926 | Box 42 \ 3 Scan024 | |
| Poor acceleration and engine stalling issues with the Falcon X carburetters. | 11th Nov 1926 | Box 42 \ 3 Scan025 | |
| Experiments investigating factors that affect engine acceleration, specifically carburettor performance. | 11th Nov 1926 | Box 42 \ 3 Scan026 | |
| Carburettor testing and adjustments concerning petrol level, diffuser, and slow running slot. | 11th Nov 1926 | Box 42 \ 3 Scan027 | |
| Typed report page detailing tests and modifications on a carburetter to fix acceleration issues. | 11th Nov 1926 | Box 42 \ 3 Scan028 | |
| Test report on carburetter modifications using a Claudel diffuser from an Eagle carburetter to improve acceleration. | 11th Nov 1926 | Box 42 \ 3 Scan029 | |
| Technical report on carburetter experiments concerning acceleration and idler jet performance, recommending modifications. | 11th Jan 1926 | Box 42 \ 3 Scan030 | |
| Blueprint detailing experiments with Claudel jets in a duplex carburettor. | 11th Jan 1926 | Box 42 \ 3 Scan031 | |
| Heavily faded document with a 'PRINT ROOM' stamp from Derby. | 12th Nov 1926 | Box 42 \ 3 Scan032 | |
| Confirming the decision to completely redesign the F.10 carburettors for improved functionality and accessibility. | 12th Nov 1926 | Box 42 \ 3 Scan033 | |
| Modifications and issues with engine components like carburetors, ignition, and altitude control. | 12th Nov 1926 | Box 42 \ 3 Scan034 | |
| Critique of Claudel carburettor defects and piston performance, outlining areas for investigation and noting improvements from wet liners. | 12th Nov 1926 | Box 42 \ 3 Scan035 | |
| Letter from H.M. Hobson, Ltd. acknowledging order No. 61015 and discussing the production schedule for carburettors. | 12th Nov 1926 | Box 42 \ 3 Scan036 | |
| Letter from H.M. Hobson Ltd. discussing delivery schedules for order 61015 and requesting sizes for chokes and jets. | 12th Nov 1926 | Box 42 \ 3 Scan037 | |
| Performance data for Claudel carburetters fitted to a 'V' type engine, with a proposal for further tests on a 6-cylinder unit. | 12th Nov 1926 | Box 42 \ 3 Scan038 | |
| From Wd. to Hs. forwarding a letter from H.M. Hobson Ltd. | 17th Nov 1926 | Box 42 \ 3 Scan039 | |
| Letter from H.M. Hobson Ltd. regarding the conversion and calibration of jet sizes for AVT.64.B. carburetters. | 15th Nov 1926 | Box 42 \ 3 Scan040 | |
| Experiments to improve the Falcon X induction system and cold distribution using Claudel Hobson carburetters. | 29th Nov 1926 | Box 42 \ 3 Scan041 | |
| Manifold design tests for a 6 cylinder F.X. engine, aiming to improve distribution and efficiency. | 29th Nov 1926 | Box 42 \ 3 Scan042 | |
| Testing and performance of new vertical carburettors compared to the Claudel model. | 29th Nov 1926 | Box 42 \ 3 Scan043 | |
| Letter from H.M. Hobson Ltd. regarding the first models of the type AV48B carburettor. | 30th Nov 1926 | Box 42 \ 3 Scan044 | |
| Page 2 of a letter from H.M. Hobson, Ltd. regarding carburettor delivery and trials. | 30th Nov 1926 | Box 42 \ 3 Scan045 | |
| The performance characteristics of a Falcon X supercharger, detailing inefficiencies in the diffuser and inlet guide vanes. | 1st Dec 1926 | Box 42 \ 3 Scan046 | |
| With calculations regarding vane dimensions and airflow characteristics for a supercharger. | 1st Dec 1926 | Box 42 \ 3 Scan047 | |
| Calculations of comparative gas and wheel velocities at the inlet guide vanes during testing. | 1st Dec 1926 | Box 42 \ 3 Scan048 | |
| Calculations for guide vane angles and a description of supercharger testing methods. | 1st Dec 1926 | Box 42 \ 3 Scan049 | |
| Page detailing the methodology for testing supercharger performance, including torque and air measurement, and efficiency estimation. | 1st Dec 1926 | Box 42 \ 3 Scan050 | |
| Analysis of supercharger pressure measurements and calculations for adiabatic efficiency. | 1st Dec 1926 | Box 42 \ 3 Scan051 | |
| The total efficiency formula and a weight breakdown for the Falcon X supercharger components. | 4th Dec 1936 | Box 42 \ 3 Scan052 | |
| Performance graph for a Falcon X Supercharger with a Claudel Hobson A.V.T. Carburetter at 18,000 RPM. | 4th Dec 1936 | Box 42 \ 3 Scan053 | |
| Blank page with a Print Room date stamp from Derby. | 6th Dec 1926 | Box 42 \ 3 Scan054 | |
| Performance graphs for a Falcon X Supercharger with a Claudel Hobson A.V.T. carburetter at 20,000 R.P.M. | 4th Dec 1926 | Box 42 \ 3 Scan055 | |
| Blueprint diagram of a supercharger testing rig. | 3rd Dec 1926 | Box 42 \ 3 Scan056 | |
| Stamped document page from the Photo Room in Derby. | 6th Dec 1926 | Box 42 \ 3 Scan057 | |
| Technical drawing detailing the layout of a diffuser with specific angles and diameters. | 1st Oct 1926 | Box 42 \ 3 Scan058 | |
| Urgent internal memo requesting an order for two AV-48-B type carburetters from Messrs. H.M. Hobson. | 9th Dec 1926 | Box 42 \ 3 Scan059 | |
| Letter to H.M. Hobson Ltd. regarding the purchase of two AV-48-B type carburetters. | 9th Dec 1926 | Box 42 \ 3 Scan060 | |
| Letter from H.M. Hobson, Ltd. confirming an order for two AV-48-B carburetters. | 10th Dec 1926 | Box 42 \ 3 Scan061 | |
| Tests conducted on the valve bounce phenomenon in the F.10 engine. | 13th Dec 1926 | Box 42 \ 3 Scan062 | |
| Engine tests observing valve and cam motion under different carburetor and timing settings, including a diagram of a cam and roller. | 13th Dec 1926 | Box 42 \ 3 Scan063 | |
| Investigation into the causes of valve rotation, erosion, and bounce in engines. | 17th Dec 1926 | Box 42 \ 3 Scan064 | |
| List of carburetter parts received on loan from Messrs. Claudel Hobson. | 17th Dec 1926 | Box 42 \ 3 Scan065 | |
| Preliminary test results for the new F.10 carburetters fitted on a 6-cylinder Vee unit. | 31th Dec 1926 | Box 42 \ 3 Scan066 | |
| Carburettor adjustments for improved acceleration in car and aeroplane engines. | 31th Dec 1926 | Box 42 \ 3 Scan067 | |
| Examination of Stromberg and Claudel carburettor designs, focusing on fuel levels and float chamber arrangements for aircraft engines. | 31th Dec 1926 | Box 42 \ 3 Scan068 | |
| Carburetter and choke adjustments for Condor, Eagle, and Falcon aero engines. | 31th Dec 1926 | Box 42 \ 3 Scan069 | |
| Sketch showing how petrol feed to a diffuser is influenced by the position of the plane, including a diagram of a Stromberg float chamber. | 3rd Jan 1927 | Box 42 \ 3 Scan070 | |
| Heavily faded and mostly illegible single-page document with a red ink stamp in the bottom right corner. | 3rd Jan 1927 | Box 42 \ 3 Scan071 | |
| Modifications to the carburettor float design for the Vee engine. | 7th Jan 1927 | Box 42 \ 3 Scan072 | |
| Failure of a Spanish carburetter and proposing further tests and modifications. | 1st Jan 1927 | Box 42 \ 3 Scan073 | |
| Design proposals and modifications for 'V' engine carburettors. | 1st Jan 1927 | Box 42 \ 3 Scan074 | |
| Design improvements for V-engine carburettors, including the float pivot and diffuser emulsion scheme. | 23th Jan 1927 | Box 42 \ 3 Scan075 | |
| Design improvements for F.10 carburetters, focusing on the diabolo float, throttle adjustments and idling jet. | 27th Jan 1927 | Box 42 \ 3 Scan076 | |
| Letter to H.M. Hobson Ltd. expressing disappointment with small car carburetters and inquiring about potential aero carburetter alternatives. | 27th Jan 1927 | Box 42 \ 3 Scan077 | |
| Letter from H.M. Hobson Ltd. regarding carburettor issues and air intake position on a 40-50 HP engine. | 28th Jan 1927 | Box 42 \ 3 Scan078 | |
| Page 2 of a letter from H. M. Hobson Ltd. regarding the placement of baffles inside a tank. | 28th Jan 1927 | Box 42 \ 3 Scan079 | |
| Proposed new design of carburettors for the 'Vee' engine, focusing on float chamber and emulsion tube placement. | 22th Jan 1927 | Box 42 \ 3 Scan080 | |
| List of desirable features and modifications for a carburetter system, page 2. | 22th Jan 1927 | Box 42 \ 3 Scan081 | |
| Concluding with an agreement to proceed with preliminary air tests. | 2nd Feb 1927 | Box 42 \ 3 Scan082 | |
| The procurement of two CZP model carburettors from Messrs. Hobson Ltd. on a sale or return basis. | 2nd Feb 1927 | Box 42 \ 3 Scan083 | |
| Poor results from Stromberg carburetters and proposing to test Claudel carburetters. | 2nd Feb 1927 | Box 42 \ 3 Scan084 | |
| Letter from H.M. Hobson regarding the testing and return of two copper air intake liners and a follow-up on a sales agreement. | 11th Feb 1927 | Box 42 \ 3 Scan085 | |
| Letter to H.M. Hobson Ltd. regarding carburettor tests, a telegage unit for a 20 HP car, and delays with a 40/50 HP car. | 12th Feb 1927 | Box 42 \ 3 Scan086 | |
| Make-or-buy decision for carburettors for the F.10 engine. | 1st Feb 1927 | Box 42 \ 3 Scan087 | |
| Endurance test report on carburettor freezing issues leading to increased petrol consumption. | 14th Feb 1927 | Box 42 \ 3 Scan088 | |
| Report page discussing carburettor freezing tendencies in aircraft engines and potential solutions, with an extract from a Curtiss engine test. | 14th Feb 1927 | Box 42 \ 3 Scan089 | |
| Report discussing engine weakening at high altitude due to potential carburettor freezing in various aero engines. | 14th Feb 1927 | Box 42 \ 3 Scan090 | |
| Carburetter freezing and requesting information on carburetter design used by a record-breaking pilot. | 14th Feb 1927 | Box 42 \ 3 Scan091 | |
| Recommendations from a conference on carburetter design and modifications. | 1st Feb 1927 | Box 42 \ 3 Scan092 | |
| Carburettor issues related to slow running plugs, throttles, and jet levels. | 2nd Jan 1941 | Box 42 \ 3 Scan093 | |
| Continuation page of a typed memo regarding points for carburetter production. | 20th Mar 1927 | Box 42 \ 3 Scan094 | |
| Carburetter icing, hot water jacketing, and comparing carburetter designs and supercharger configurations. | 20th Mar 1927 | Box 42 \ 3 Scan095 | |
| Letter to H. M. Hobson Ltd. regarding the calibration of a gauge face for a 40/50 HP model and the return of four carburettors. | 21th Feb 1927 | Box 42 \ 3 Scan096 | |
| Letter to H.M. Hobson Ltd. requesting a representative to assist with unsatisfactory carburettor test results on a Vee aero engine. | 1st Mar 1927 | Box 42 \ 3 Scan097 | |
| Bristol-Jupiter Claudel carburettor and suggesting it be acquired for testing. | 10th Dec 1927 | Box 42 \ 3 Scan098 | |
| Delivery of chassis rear springs with specific modifications, following a telephone conversation with Mr. Alfred Woodhead. | 5th May 1920 | Box 42 \ 3 Scan099 | |
| Proposal from Jonas Woodhead & Sons Ltd. for supplying and modifying rear chassis springs. | 13th May 1920 | Box 42 \ 3 Scan100 | |
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