| Description | Date | Identifier | |
| Two schemes for mounting carburettors and induction pipes for an Eagle 16 engine bench test. | 30th Dec 1925 | Box 42 \ 1 Scan104 | |
| Modifications to a cylinder head, specifically the induction pipe flanges and adding reinforcement. | 30th Apr 1926 | Box 42 \ 1 Scan105 | |
| Outlining a procedure to determine the correct ramming length for an induction pipe to achieve high M.E.P. | 19th Aug 1926 | Box 42 \ 1 Scan106 | |
| Results of a 2-hour acceptance test for an E.XV1 engine, noting power, consumption, and system performance. | 14th Jan 1927 | Box 42 \ 1 Scan107 | |
| Dismantling of an engine for A.I.D. inspection and subsequent final acceptance test. | 12th Nov 1925 | Box 42 \ 1 Scan108 | |
| Magneto ignition system options and strategy for the Eagle 16 engine. | 12th Nov 1925 | Box 42 \ 1 Scan109 | |
| Magneto bracket for the Eagle 16 direct drive, referencing drawing LeC.2171. | 21th Nov 1925 | Box 42 \ 1 Scan110 | |
| Comparing the weight and performance of an 'Athmos' primer against a standard 'RR' primer. | 1st Feb 1925 | Box 42 \ 1 Scan111 | |
| The testing and features of the Athmos Primer. | 1st Feb 1925 | Box 42 \ 1 Scan112 | |
| The function of a fuel pulverizer and its specifications, including jet size. | 10th Feb 1925 | Box 42 \ 1 Scan113 | |
| Urgent request for the results of tests conducted on an Athmos Primer. | 26th Nov 1925 | Box 42 \ 1 Scan114 | |
| Requesting which engines to fit with newly made priming nozzles for testing. | 28th Oct 1927 | Box 42 \ 1 Scan115 | |
| On the F.XI engine, noting improvements in slow running but ongoing problems with starting. | 21th Nov 1927 | Box 42 \ 1 Scan116 | |
| From AJS to HS requesting an update on the results for RR. E. 16. and plain bearings. | 6th Nov 1925 | Box 42 \ 1 Scan117 | |
| Comparing drip feed and oil pressure fed bearings for the Eagle XVI engine. | 12th Jun 1925 | Box 42 \ 1 Scan118 | |
| Describing the design of a direct drive nose, including propeller shaft bearings and casing. | 18th Nov 1925 | Box 42 \ 1 Scan119 | |
| The failure of pressure and gravity fed Eagle plain bearings during testing. | 26th Nov 1925 | Box 42 \ 1 Scan120 | |
| Test report on a gravity-fed floating bearing, detailing failures at high speed and test results under various loads. | 28th Nov 1925 | Box 42 \ 1 Scan121 | |
| From 'E.' to 'Hs.' requesting clarification on the behaviour of a floating bush for the EAGLE XVI engine. | 28th Nov 1925 | Box 42 \ 1 Scan122 | |
| Unexpected bearing failure and outlining further tests for the Eagle XVI engine plain bearings. | 30th Nov 1925 | Box 42 \ 1 Scan123 | |
| Eagle XVI engine bearings, comparing oils, feed systems, and bush types. | 1st Dec 1925 | Box 42 \ 1 Scan124 | |
| Testing plain whitemetalised bearings for the Eagle XVI engine. | 1st Dec 1935 | Box 42 \ 1 Scan125 | |
| Page detailing results from the second and third bearing tests, including measurements, temperatures, and a seizure failure. | 12th Jun 1925 | Box 42 \ 1 Scan126 | |
| Results of thrust tests on a new direct drive nose and thrust bearing, No. 215. | 4th Dec 1928 | Box 42 \ 1 Scan127 | |
| The Eagle XVI thrust bearing. | 11th Dec 1925 | Box 42 \ 1 Scan128 | |
| Eagle XVI engine thrust bearing test. | 14th Dec 1925 | Box 42 \ 1 Scan129 | |
| Successful identification of a double conical thrust bearing and comparing it to a less efficient Curtiss model. | 15th Dec 1925 | Box 42 \ 1 Scan130 | |
| Rough stress curve for the RR. E.XVI. direct drive propeller shaft and requesting modifications to the bore. | 21th Dec 1925 | Box 42 \ 1 Scan131 | |
| Weight and potential modifications of E.16 engine units, specifically the propeller shaft and nose piece. | 12th Jan 1926 | Box 42 \ 1 Scan132 | |
| Successful test of a new departure thrust bearing for the Condor engine, noting a potential weight saving. | 1st Feb 1926 | Box 42 \ 1 Scan133 | |
| Thrust tests for a new No. 216 bearing intended to replace the existing thrust bearing on the Condor engine. | 26th Jan 1926 | Box 42 \ 1 Scan134 | |
| Comparative weight analysis of a Condor thrust bearing versus a New Departure bearing. | 8th Feb 1926 | Box 42 \ 1 Scan135 | |
| Progress update on plain bearing experiments with floating bushes and rigid external housing. | 8th Feb 1926 | Box 42 \ 1 Scan136 | |
| Reduction of weight for the RR. E.16 Direct Drive Nose by changing the thrust bearing. | 11th Feb 1926 | Box 42 \ 1 Scan137 | |
| Request for individual component weights of a propeller shaft assembly to compare an existing design with a new, lighter one. | 17th Feb 1926 | Box 42 \ 1 Scan138 | |
| Redesign modifications for weight reduction on the E.XVI direct drive nose. | 25th Feb 1926 | Box 42 \ 1 Scan139 | |
| Design modifications to an engine's aluminium extension, bolts, nose, and coupling for weight and cost reduction. | 26th Feb 1926 | Box 42 \ 1 Scan140 | |
| Weight reduction of the RR. E. XVI direct drive nose from 42 lbs to 27.79 lbs. | 26th Feb 1926 | Box 42 \ 1 Scan141 | |
| From Hs. to AJS. providing an update on delayed bearing tests and initial results. | 1st Mar 1926 | Box 42 \ 1 Scan142 | |
| Comparative test request for a double-row ball bearing for the Eagle XVI reduction gear. | 19th Oct 1925 | Box 42 \ 2 Scan001 | |
| Delay with the supercharger for the Eagle XVI engine due to gear grinding problems. | 28th Jan 1926 | Box 42 \ 2 Scan002 | |
| Delays in completing the Eagle XVI engine due to problems with the gear supplier. | 28th Jan 1926 | Box 42 \ 2 Scan003 | |
| Experiments and testing procedures for floating bush bearings on the Eagle XVI engine reduction gear. | 17th Oct 1925 | Box 42 \ 2 Scan004 | |
| Cross-sectional diagram of a trunnion pin assembly with lubrication points and modification notes. | 17th Oct 1925 | Box 42 \ 2 Scan005 | |
| Confirmation of a telegram regarding a Wormald Eagle rod failure, its probable cause, and proposed testing. | 21th Mar 1918 | Box 42 \ 2 Scan006 | |
| Connecting rod failure during engine testing, attributing it to a forging crack rather than a design fault. | 26th Mar 1918 | Box 42 \ 2 Scan007 | |
| Proposal for testing connecting rods of various materials and heat treatments following a failure. | 26th Mar 1918 | Box 42 \ 2 Scan008 | |
| Connecting rod failures in Eagle engines, discussing potential causes such as forging defects and ongoing material tests. | 28th Mar 1918 | Box 42 \ 2 Scan009 | |
| Analysis of failed C.V.S. connecting rods detailing the steel composition and a conclusion that overheating was the cause of failure. | 26th Apr 1917 | Box 42 \ 2 Scan010 | |
| Longitudinal flaw in a connecting rod due to forging the metal when too cold. | 3rd Apr 1918 | Box 42 \ 2 Scan011 | |
| Testing of mild steel connecting rods for the 'Eagle' engine to investigate a potential design fault. | 14th Jun 1918 | Box 42 \ 2 Scan012 | |
| Requesting an update on the testing of mild steel connecting rods to determine the cause of breakages. | 23th Jul 1918 | Box 42 \ 2 Scan013 | |
| The fitting of mild steel connecting rods to the Experimental 'D' Engine. | 13th Aug 1918 | Box 42 \ 2 Scan014 | |
| Analysis and testing report on mild steel used for Eagle connecting rods. | 13th Aug 1918 | Box 42 \ 2 Scan015 | |
| Testing mild steel main rods for an Eagle engine, concluding failures are due to material flaws rather than design. | 13th Aug 1918 | Box 42 \ 2 Scan016 | |
| Cover note for a report on Eagle connecting rods made from mild steel, noting their running time. | 28th Jan 1926 | Box 42 \ 2 Scan017 | |
| Analysis and testing of Eagle connecting rods made of mild steel. | 13th Aug 1918 | Box 42 \ 2 Scan018 | |
| Continuation of a report on connecting rod testing, attributing failures to material flaws rather than design. | 19th Mar 1918 | Box 42 \ 2 Scan019 | |
| Letter from the designer and patentee of a carburettor offering the design for inspection and potential use in aero and car engines. | 19th Mar 1918 | Box 42 \ 2 Scan020 | |
| Letter to Mr. Davidson requesting arrangement drawings of a Carburetter for examination. | 26th Mar 1918 | Box 42 \ 2 Scan021 | |
| Letter discussing alterations to drawings, specifically to the throttles and a needle to prevent air leaks and improve starting efficiency. | 27th Mar 1918 | Box 42 \ 2 Scan022 | |
| Letter from Stephen R. Townsend discussing carburettor design improvements and a new idea for a slide valve engine. | 10th Apr 1918 | Box 42 \ 2 Scan023 | |
| Letter rejecting a patent carburetter design, outlining five points of failure for a modern aero engine. | 10th Apr 1918 | Box 42 \ 2 Scan024 | |
| Cancelling specific plug parts for the 'Eagle' engine hand starter. | 23th Apr 1918 | Box 42 \ 2 Scan025 | |
| Replacement parts for the 'Eagle' engine hand starter and starting handles. | 23th Apr 1918 | Box 42 \ 2 Scan026 | |
| Parts, testing, and production for a hand starter on 'Eagle' engines. | 26th Apr 1918 | Box 42 \ 2 Scan027 | |
| Modifications to hand starter casings for 'Eagle' engines. | 1st May 1918 | Box 42 \ 2 Scan028 | |
| The arrangement of a hand starter for 'Eagle' engines. | 2nd May 1918 | Box 42 \ 2 Scan029 | |
| Internal memorandum regarding hand starter arrangements for 'Eagle' engines. | 3rd May 1918 | Box 42 \ 2 Scan030 | |
| Confirming an experiment for a hand starter, operated from either side of the engine, has now become a production job. | 6th Jun 1918 | Box 42 \ 2 Scan031 | |
| Cancelling experiments for sheathed wires for seaplanes and an electrical water heating device. | 21th Jan 1918 | Box 42 \ 2 Scan032 | |
| Induction pipe tests, comparing six-cylinder pipes to four carburetters and planning future tests on an Eagle engine. | 4th Apr 1918 | Box 42 \ 2 Scan033 | |
| Extract discussing the use of a six-cylinder induction pipe to eliminate blowback and allow for a straight-through carburetter. | 23th Mar 1918 | Box 42 \ 2 Scan034 | |
| Cancellation notice for an experiment on Claudel type carburetters with a concentric ring float. | 13th Dec 1918 | Box 42 \ 2 Scan035 | |
| Requesting the experimental department to produce new rocker lever rollers from a different steel to prevent scoring. | 15th Apr 1918 | Box 42 \ 2 Scan036 | |
| Requesting an experiment on a new steel material for 'Falcon' engine rocker roller levers. | 16th Apr 1918 | Box 42 \ 2 Scan037 | |
| Requesting to expedite an experiment on rocker lever tappet rollers made from special ball bearing steel. | 14th May 1918 | Box 42 \ 2 Scan038 | |
| Confirming that Valve Rollers E.12101 have been fitted to the 'Hawk' Cam and Rocker. | 2nd Oct 1918 | Box 42 \ 2 Scan039 | |
| Valve rockers for K.E. J.B.S. which were trialled on a 'Hawk' engine and found to offer no advantage. | 8th Sep 1919 | Box 42 \ 2 Scan040 | |
| Mr. Burton's calculations for torque variation and stress on the 'Eagle' engine crankshaft. | 12th Apr 1918 | Box 42 \ 2 Scan041 | |
| Proposal for a stress-testing apparatus to determine the breaking point of a crankshaft. | 28th Apr 1917 | Box 42 \ 2 Scan042 | |
| Crank breakage, potentially caused by torsional vibration, and a request to rig up a testing apparatus. | 18th Apr 1918 | Box 42 \ 2 Scan043 | |
| Scheme for a rig and test pieces for static torsional tests on crankshaft journals. | 18th Apr 1918 | Box 42 \ 2 Scan044 | |
| Design of a three-cylinder oil pump for experimental crankshaft testing. | 13th Jul 1918 | Box 42 \ 2 Scan045 | |
| The construction of a pump, with a sketch and component specifications. | 13th Jul 1918 | Box 42 \ 2 Scan046 | |
| Design of an oil pump, valve chest, and base plate. | 1st Jul 1918 | Box 42 \ 2 Scan047 | |
| Mr. Royce's feedback on proposals for crankshaft and piston testing apparatus. | 26th Jul 1918 | Box 42 \ 2 Scan048 | |
| Modified rig for testing crankshaft stress and torque using oil pressure. | 15th Feb 1916 | Box 42 \ 2 Scan049 | |
| Technical letter discussing methods for piston and crankshaft testing, including oil pressure application and pump configuration. | 15th Feb 1916 | Box 42 \ 2 Scan050 | |
| Requesting to proceed with an experimental test on an apparatus as per Mr. Royce's wishes. | 15th Aug 1916 | Box 42 \ 2 Scan051 | |
| Schematic diagram of an oil pump and motor cylinder for a piston and crank test. | 23th Jul 1918 | Box 42 \ 2 Scan052 | |
| Preparation of 'Eagle' model crankshafts for a torsion test. | 4th Oct 1918 | Box 42 \ 2 Scan053 | |
| The tensile tests conducted on model Eagle engine cranks. | 11th Nov 1919 | Box 42 \ 2 Scan054 | |
| Torsion tests on H-shaped and U-shaped test pieces and their fracture analysis. | 26th Apr 1917 | Box 42 \ 2 Scan055 | |
| Results and conclusions from static torsion tests on various crank and shaft test pieces. | 11th Nov 1919 | Box 42 \ 2 Scan056 | |
| Proposal to test full-size aero engine cranks cut from scrap shafts. | 1st Nov 1919 | Box 42 \ 2 Scan057 | |
| And a diagram detailing torsion test results on a miniature crankshaft. | 27th Oct 1919 | Box 42 \ 2 Scan058 | |
| The reverse of a document with a 'Print Room' date stamp from Derby. | 30th Oct 1919 | Box 42 \ 2 Scan059 | |
| Performance comparison of the Goshawk 11 car against the 40/50 HP model and other 20 HP cars. | 13th Mar 1922 | Box 42 \ 2 Scan060 | |
| Comparative table of British, Continental, and American car engine specifications against the Goshawk model. | 16th Mar 1922 | Box 42 \ 2 Scan061 | |
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