| Description | Date | Identifier | |
| Questioning the delay in implementing new type springs and investigating the cause of defective ones. | 2nd Feb 1927 | Box 43 \ 3 Scan125 | |
| Design considerations for a new cam for rollerless rockers, focusing on spring pressure and operating characteristics. | 2nd Feb 1927 | Box 43 \ 3 Scan126 | |
| Proposal for a new inlet cam form submitted for criticism, detailing changes to acceleration and engine timing. | 10th Feb 1927 | Box 43 \ 3 Scan127 | |
| Design and urgent production of compensated cams for the F.10 engine. | 13th Feb 1927 | Box 43 \ 3 Scan128 | |
| Instructing the Drawing Office to proceed with a new exhaust cam and await a blueprint for a modified valve lift curve. | 15th Feb 1927 | Box 43 \ 3 Scan129 | |
| Alternative designs for valve gear rocker bars and their mounting. | 2nd Feb 1927 | Box 43 \ 3 Scan130 | |
| The failure of a camshaft vertical drive on an X.F.8. engine during endurance testing. | 24th Feb 1927 | Box 43 \ 3 Scan131 | |
| Aero engine reliability, focusing on piston failure from oil gumming and comparing various oils. | 1st Mar 1927 | Box 43 \ 3 Scan132 | |
| Continued memorandum discussing camshaft drive problems and logistical arrangements for personnel. | 3rd Mar 1920 | Box 43 \ 3 Scan133 | |
| Recalculation of special cam forms and valve lift curves for the F.10 engine. | 3rd Mar 1920 | Box 43 \ 3 Scan134 | |
| Modifications to valve lift curves for rockers without rollers, specifically regarding timing and rocker radius. | 7th Mar 1927 | Box 43 \ 3 Scan135 | |
| Two schemes for strengthening rocker bars and designing oilways for valve gear rockers without rollers. | 8th Mar 1927 | Box 43 \ 3 Scan136 | |
| Valve lift curves, cam timing adjustments, and the design considerations for making camshafts interchangeable. | 11th Mar 1927 | Box 43 \ 3 Scan137 | |
| Proposal to use an artificially weakened camshaft drive for hangar tests to evaluate improvements. | 11th Mar 1927 | Box 43 \ 3 Scan138 | |
| The failure of camshaft and magneto drives on a hangar test, suspecting torsional vibration as the cause. | 10th Mar 1927 | Box 43 \ 3 Scan139 | |
| Comparison of explosion impulses and inertia torque in 20 HP and Falcon engines, and analysis of crankshaft oscillations. | 10th Mar 1927 | Box 43 \ 3 Scan140 | |
| Summary of crankshaft vibration tests analysing resonance and the effects of running the engine with and without a propeller. | 10th Mar 1927 | Box 43 \ 3 Scan141 | |
| Crankshaft vibration tests, the effectiveness of a spring drive as a shock damper, and further testing with a flywheel. | 16th Mar 1927 | Box 43 \ 3 Scan142 | |
| Confirming instructions for adjusting the camshaft drive on F.10 hangar engines. | 16th Mar 1927 | Box 43 \ 3 Scan143 | |
| Resolution of camshaft troubles, proposed magneto drive modifications, and ongoing engine performance issues. | 16th Mar 1927 | Box 43 \ 3 Scan144 | |
| Test report on a Falcon 10 engine camshaft drive failure and subsequent endurance testing. | 8th Mar 1927 | Box 43 \ 3 Scan145 | |
| Camshaft spline and magneto drive issues, including proposed modifications for testing. | 29th Jul 1917 | Box 43 \ 3 Scan146 | |
| Camshaft drive endurance tests with an aluminium pin and frictional damper. | 22th Mar 1927 | Box 43 \ 3 Scan147 | |
| Cross-sectional diagram showing the arrangement for a camshaft driving pin. | 18th Mar 1927 | Box 43 \ 3 Scan148 | |
| Cover sheet with a handwritten reference number, date, and a stamped date. | 18th Mar 1927 | Box 43 \ 3 Scan149 | |
| Blueprint for rockers without rollers and its impact on cam and valve lift. | 23th Mar 1927 | Box 43 \ 3 Scan150 | |
| Confirmation of a telegram detailing engine design decisions and issues. | 21th Mar 1927 | Box 43 \ 3 Scan151 | |
| Camshaft drive failures, focusing on damping friction and proposing design improvements. | 24th Mar 1927 | Box 43 \ 3 Scan152 | |
| Excessive wear on valve rocker bushes in Condor III engines at Farnborough and potential design modifications. | 4th Apr 1927 | Box 43 \ 3 Scan153 | |
| Series of camshaft drive tests conducted on an X-F-10 engine. | 5th Apr 1927 | Box 43 \ 3 Scan154 | |
| Report page detailing the conditions and results of engine endurance tests, noting component wear and a premature test termination. | 1st Apr 1927 | Box 43 \ 3 Scan155 | |
| On a new, simpler camshaft drive for the F.10 high compression engine. | 1st Apr 1927 | Box 43 \ 3 Scan156 | |
| The material specification and heat treatment for a new camshaft and rocker mechanism. | 7th Apr 1927 | Box 43 \ 3 Scan157 | |
| Improved key for the rear camshaft bearing following a failure report. | 14th Apr 1927 | Box 43 \ 3 Scan158 | |
| Drawing of a modified camshaft drive with a bayonet joint for easier engine timing. | 30th Apr 1927 | Box 43 \ 3 Scan159 | |
| Modifications to the camshaft drive, cylinder block casting, and carburettor. | 3rd May 1927 | Box 43 \ 3 Scan160 | |
| The manufacturing of F.11 engine camshafts and awaiting confirmation on the final cam form. | 25th Jun 1927 | Box 43 \ 3 Scan161 | |
| Camshaft and high compression piston modifications for 2b engines. | 28th Jun 1927 | Box 43 \ 3 Scan162 | |
| Recommendation to proceed with standard camshafts for F.11 engines due to RPM limitations. | 1st Jun 1927 | Box 43 \ 3 Scan163 | |
| The effect of using longer duration inlet camshafts and rollerless rocker type E.30006. | 8th Aug 1927 | Box 43 \ 3 Scan164 | |
| Comparative power curve graph for F.10 engines, testing the effect of a later inlet closing time. | 8th Aug 1927 | Box 43 \ 3 Scan165 | |
| Single page document with a handwritten reference at the top and a date stamp at the bottom. | 10th Aug 1927 | Box 43 \ 3 Scan166 | |
| Proposed Condor valve lift curve and its application to other aero engines. | 3rd Sep 1927 | Box 43 \ 3 Scan167 | |
| Timing procedures for F.11 and F.12 engines. | 6th Oct 1927 | Box 43 \ 3 Scan168 | |
| Procedure for timing the F.11 and F.12 engines. | 6th Oct 1927 | Box 43 \ 3 Scan169 | |
| Continued document detailing engine timing specifications, clearances, and variations. | 6th Oct 1927 | Box 43 \ 3 Scan170 | |
| Listing the allowances for engine timing and camshaft inspection inaccuracies and their potential causes. | 8th Apr 1928 | Box 43 \ 3 Scan171 | |
| Testing of aluminium alloy bearings for camshafts to save weight. | 8th Apr 1928 | Box 43 \ 3 Scan172 | |
| Confirming arrangements to add an oil drain hole to the camshaft drives on 'Fox' and 'Wizard' machines. | 1st Apr 1928 | Box 43 \ 3 Scan173 | |
| Amendment to the F.11 & F.XII engine timing instructions due to unsecured telescopic covers on the camshaft drives. | 1st May 1928 | Box 43 \ 3 Scan174 | |
| Instruction book page detailing the timing procedure for F.XI & XII engines. | 1st May 1928 | Box 43 \ 3 Scan175 | |
| Methods for accurately finding the engine's top dead centre (TDC). | 24th Aug 1928 | Box 43 \ 3 Scan176 | |
| Completed scheme to prevent the camshaft drive from coming out of mesh on F Type engines. | 24th Aug 1928 | Box 43 \ 3 Scan177 | |
| Modifications to the camshaft drive for existing engines. | 25th Aug 1928 | Box 43 \ 3 Scan178 | |
| Alterations for the A and B units and a future design for the RR.F. Camshaft Drive. | 1st Sep 1928 | Box 43 \ 3 Scan179 | |
| Letter to the Air Ministry assigning modification numbers to scheme drawings for F-type engine components, specifically camshaft oil pipes and petrol pipes. | 8th Sep 1928 | Box 43 \ 3 Scan180 | |
| Comparison of engine timing diagrams for standard and low lift camshafts, including clearance values. | 18th Sep 1928 | Box 43 \ 3 Scan181 | |
| Instructions for fitting new camshafts to the 'Pipit' and other machines, ensuring definite orders and payment. | 18th Sep 1928 | Box 43 \ 3 Scan182 | |
| Comparative power tests of the RR.F.XI.S. engine no.35, using standard versus long duration cams. | 1st Sep 1928 | Box 43 \ 3 Scan183 | |
| Engine performance tests conducted with air boxes and modified camshafts, including a comparison table of results. | 17th Sep 1928 | Box 43 \ 3 Scan184 | |
| Engine power improvements with long duration cams and collaboration with aircraft manufacturers. | 18th Sep 1928 | Box 43 \ 3 Scan185 | |
| Performance comparison graph for a Vickers Scout engine with standard and long duration cams at various pressure heights. | 18th Sep 1928 | Box 43 \ 3 Scan186 | |
| Cover page with a handwritten reference number, date, and a print room stamp. | 21th Sep 1928 | Box 43 \ 3 Scan187 | |
| Graph comparing the performance of standard versus long duration cams on Engine No 35 - Vickers Scout. | 21th Sep 1928 | Box 43 \ 3 Scan188 | |
| Blank page with a date stamp in the bottom right corner. | 21th Sep 1928 | Box 43 \ 3 Scan189 | |
| Performance graph showing altitude corrections for the FXI.S. engine with modified cams. | 19th Sep 1928 | Box 43 \ 3 Scan190 | |
| Requirement to start the M.S/C. type test on engine No.113 and referencing another test on engine F.XI No.13. | 1st Sep 1928 | Box 43 \ 3 Scan191 | |
| Letter to Vickers Ltd. forwarding test results for the RR.F. XI supercharged engine, which has passed its Acceptance Test. | 22th Sep 1928 | Box 43 \ 3 Scan192 | |
| Comparative power tests of standard vs. long duration cams on the F.XI.S. engine no. 35. | 21th Sep 1928 | Box 43 \ 3 Scan193 | |
| Engine test results comparing performance with standard, flight-tested, and long-duration camshafts. | 17th Sep 1928 | Box 43 \ 3 Scan194 | |
| Agreeing to fit long duration camshafts to the second engine for the Pipit machine. | 1st Sep 1928 | Box 43 \ 3 Scan195 | |
| Confirming an agreement for the Air Ministry to pay for long duration camshafts for an engine. | 25th Sep 1928 | Box 43 \ 3 Scan196 | |
| New cam forms for valves and their application in various engines. | 6th Oct 1928 | Box 43 \ 3 Scan197 | |
| Procedure for a moderate supercharger type test, focusing on the comparison of new and old camshafts. | 10th Oct 1928 | Box 43 \ 3 Scan198 | |
| Camshafts for the M.S. Type Test engine No. 113. | 11th Oct 1928 | Box 43 \ 3 Scan199 | |
| Letter to the Air Ministry enclosing a certified test curve for the F. Type engine with new long duration camshafts. | 13th Oct 1928 | Box 43 \ 3 Scan200 | |
| Comparative power curves of standard and long-duration camshafts for the F.11 engine. | 16th Oct 1928 | Box 43 \ 3 Scan201 | |
| Power curve comparison between a long duration and a standard camshaft. | 12th Oct 1928 | Box 43 \ 3 Scan202 | |
| Cover page with a handwritten reference number, date, and a Print Room reception stamp. | 16th Oct 1928 | Box 43 \ 3 Scan203 | |
| The design and supply of drawings for long-duration camshafts for the F. Engine. | 19th Oct 1928 | Box 43 \ 3 Scan204 | |
| Instruction memo regarding the production and fitting of a new long duration camshaft for an F.XII engine following its type test. | 18th Oct 1928 | Box 43 \ 3 Scan205 | |
| The use and design of long duration camshafts for the F-type engine. | 27th Oct 1928 | Box 43 \ 3 Scan206 | |
| Requesting instructions and an order number for moving camshafts from Engine F.XII.S.99 to a type test engine F.XII.MS.113. | 5th Nov 1928 | Box 43 \ 3 Scan207 | |
| Requesting the retrieval of camshafts from a crashed Parnall Pipit engine to proceed with a full supercharged engine type test. | 14th Nov 1928 | Box 43 \ 3 Scan208 | |
| Decision to fit the full supercharged type test engine with new long duration camshafts. | 10th Nov 1928 | Box 43 \ 3 Scan209 | |
| Variable valve gear design from the R.A.E. for single-cylinder water-cooled engines. | 17th Nov 1928 | Box 43 \ 3 Scan210 | |
| Suitability of nitriding hardening for various aero engine components. | 19th Nov 1928 | Box 43 \ 3 Scan211 | |
| Design of a single-cylinder test unit, focusing on its variable valve gear mechanism. | 19th Nov 1928 | Box 43 \ 3 Scan212 | |
| The fitting of new camshafts to engines for the Interceptor Competition. | 21th Nov 1928 | Box 43 \ 3 Scan213 | |
| Urgent supply and fitting of new camshafts for F Engines in various interceptor aircraft. | 22th Nov 1923 | Box 43 \ 3 Scan214 | |
| The supply and fitting of new camshafts for Scout machines. | 23th Nov 1928 | Box 43 \ 3 Scan215 | |
| New camshafts for 'F' Engines in the Interceptor Competition. | 26th Nov 1928 | Box 43 \ 3 Scan216 | |
| Valve lift modifications and timing for the 'F' type supercharged engine. | 1st Dec 1928 | Box 43 \ 3 Scan217 | |
| Instruction regarding the design and fitting of new F. Type camshafts to a test engine. | 22th Dec 1928 | Box 43 \ 3 Scan218 | |
| Suggestions for camshaft and valve spring design to improve performance and reduce stress. | 29th Dec 1928 | Box 43 \ 3 Scan219 | |
| Simplification of mathematical expressions for cam lift using sinusoidal functions. | 3rd Jan 1929 | Box 43 \ 3 Scan220 | |
| Results of camshaft comparison tests on supercharged engines. | 3rd Jan 1929 | Box 43 \ 3 Scan221 | |
| Comparative power curves for a fully supercharged engine at 10,500 feet, comparing standard and long duration camshafts. | 20th Dec 1928 | Box 43 \ 3 Scan222 | |
| Reference number and date on a blank cover page with a purple ink stamp. | 8th Jan 1929 | Box 43 \ 3 Scan223 | |
| Comparative power curves at full throttle for a moderate supercharger engine, comparing standard and long duration camshafts. | 20th Dec 1928 | Box 43 \ 3 Scan224 | |
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