Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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Instructions regarding blueprints for the Wraith 11 petrol tank.28th Jan 1938Box 10 \ 2  02-page43
Requesting the scheme for the remote vent tube (FCD.489) on the Wraith petrol tank be applied to the first 100 chassis.28th Feb 1938Box 10 \ 2  02-page45
Report cover sheet for the Aero Engine Design Department outlining publication restrictions.23th Sep 1929Box 10 \ 2  02-page46
Instruction to change the petrol filler elbow lower connection tube for the 25/30 HP (Wraith III) petrol tank.29th Nov 1938Box 10 \ 2  02-page47
Modification to the oil pump drive for later Kestrel aero engines.11th Sep 1936Box 10 \ 2  02-page48
Advising against soldering the petrol feed pipe to the anti-surge tower on Wraith models due to vibration concerns.27th Feb 1939Box 10 \ 2  02-page49
The document is completely illegible due to severe fading and poor image quality.16th Mar 1939Box 10 \ 2  02-page50
Petrol supply failure on the Wraith model due to the feed pipe design.16th Mar 1939Box 10 \ 2  02-page51
Test report comparing the breaking load of riveted and welded petrol tank support straps for the Wraith model.5th Apr 1939Box 10 \ 2  02-page53
Heavily faded and almost entirely illegible typed document.12th Apr 1939Box 10 \ 2  02-page54
The practicality of spotwelding Wraith petrol tank straps.12th Apr 1939Box 10 \ 2  02-page55
The petrol filler pipe for the Wraith chassis being too short, suggesting a Phantom III part as an alternative.24th May 1939Box 10 \ 2  02-page57
Test report detailing a modification to a gilled cooler fitting on Kestrel engines to resolve a 'kink' issue.31th Aug 1939Box 10 \ 2  02-page58
Cost-saving and reliability improvement by changing the petrol pumps for the next 100 Wraith chassis.6th Jul 1939Box 10 \ 2  02-page59
Fault with Wraith HP petrol pumps causing fuel siphoning and a potential fire risk.20th Nov 1940Box 10 \ 2  02-page61
Outlining Mr. Royce's questions regarding engine side thrust, connecting rods, and crank web designs.22th Nov 1940Box 10 \ 2  02-page62
Customer issues and maintenance procedures for Wraith high-pressure petrol pumps.23th Nov 1940Box 10 \ 2  02-page63
Heavily faded, typewritten internal procedural notice or memorandum.23th Nov 1940Box 10 \ 2  02-page64
Urgent memo regarding noise from bouncing engine oil relief valves on the Wraith II and the proposed solution.22th Jan 1937Box 10 \ 3  03-page001
Test of an Aero Carburettor II Circuit following modifications to the diffuser tube.26th Mar 1934Box 10 \ 3  03-page002
Initial test results and issues with the Wraith oil relief valve and filter system.28th Jan 1937Box 10 \ 3  03-page003
Analysis of cooling test data and radiator drag for the Fairey 'Battle' aircraft.22th Dec 1938Box 10 \ 3  03-page004
Comparing different oil filter and pressure relief valve systems, recommending the use of the external filter LeC.4692.28th Jan 1937Box 10 \ 3  03-page005
Study on the aerodynamic efficiency of fixed and variable pitch aerial propellers.28th Jan 1937Box 10 \ 3  03-page006
The necessity of the LeC.4412 rocker control relief valve and results of a 10,000-mile test.28th Jan 1937Box 10 \ 3  03-page007
Addendum regarding increasing oil pressure in the Falcon III engine by replacing a spring.4th Dec 1918Box 10 \ 3  03-page008
Request for double sets of valve gear for the Wraith II engine to be made from Low Carbon Case Hardening Steel for testing.12th Feb 1937Box 10 \ 3  03-page009
Notice of cancellation for a drawing of B.HP & petrol consumption curves for the 'F' type engine.18th Nov 1927Box 10 \ 3  03-page010
Testing new Bentley valve springs on the Wraith III engine.1st Mar 1937Box 10 \ 3  03-page011
Typed document where the text is too faded to be read.3rd Mar 1937Box 10 \ 3  03-page012
Secret memo detailing modified valve rockers for the Wraith III model to suit a reduced cam lift.3rd Mar 1937Box 10 \ 3  03-page013
Specifications for the Wraith III valve lift curve, modifying the cam base circle diameter.3rd Mar 1937Box 10 \ 3  03-page015
The special radiator and shutter for Phantom II Chassis No. 182 JS.15th Dec 1930Box 10 \ 3  03-page016
Tests carried out on Wraith III valve gear springs on a Bentley unit.16th Mar 1937Box 10 \ 3  03-page017
From the Aero Engine Department regarding modifications to carburettor controls.9th Sep 1936Box 10 \ 3  03-page018
Test report tabulating results of valve bouncing with different spring sets at various engine speeds.16th Mar 1937Box 10 \ 3  03-page019
Heavily faded carbon copy of an internal memo regarding an experimental chassis.28th Aug 1944Box 10 \ 3  03-page020
Valve spring lengths for a Wraith III engine valve gear.18th Jan 1937Box 10 \ 3  03-page021
Consultation with Vauxhall regarding issues with Wraith tappets.16th Jun 1937Box 10 \ 3  03-page023
The document is completely illegible due to severe fading and low image quality.16th Jun 1937Box 10 \ 3  03-page024
Noisy camshafts, comparing them with Vauxhall and Chevrolet designs, and discussing tappet issues.16th Jun 1937Box 10 \ 3  03-page025
Blueprint detailing the casting and finished dimensions for a Vauxhall valve tappet.19th Jun 1937Box 10 \ 3  03-page027
Blank sheet of headed paper from the Print Room in Derby.19th Jun 1937Box 10 \ 3  03-page028
Technical drawing for a Vauxhall Valve Tappet.19th Jun 1937Box 10 \ 3  03-page029
Blank document with a 'Print Room' stamp from the Derby facility.19th Jun 1937Box 10 \ 3  03-page030
Blueprint detailing the specifications for a Vauxhall Valve Tappet.19th Jul 1937Box 10 \ 3  03-page031
Cover sheet for documents related to Wraith Tappets.19th Jul 1937Box 10 \ 3  03-page032
Comparison of the weights of Chevrolet and Wraith valve gear components.18th Jun 1937Box 10 \ 3  03-page033
Alteration note detailing modifications to a drawing or part.8th Apr 1931Box 10 \ 3  03-page034
Comparison of camshaft and tappet displacement specifications between a Chevrolet and a Wraith.18th Jun 1937Box 10 \ 3  03-page035
Trip to Belfast regarding high-speed cutting fluids.27th Feb 1932Box 10 \ 3  03-page036
Comparison of valve spring loads between a Chevrolet and a Wraith engine.18th Jun 1937Box 10 \ 3  03-page037
Heavily faded typewritten memorandum or test report form.10th Oct 1938Box 10 \ 3  03-page038
Request for the production of specific tappet guides and top spring washers for the Wraith III model.25th Jun 1937Box 10 \ 3  03-page039
Instructions for fitting valve springs and top washers to Wraith III units.9th Jul 1937Box 10 \ 3  03-page041
This document is unreadable due to the extremely poor quality and faded nature of the image.12th Jul 1937Box 10 \ 3  03-page042
Instruction to manufacture a set of Wraith III push rods with a new diameter of .312.12th Jul 1937Box 10 \ 3  03-page043
Trials to determine the temperature drop of water passing through condenser tubes.5th Oct 1911Box 10 \ 3  03-page044
The machining of 24 tappet blanks for Wraith III units.12th Jul 1937Box 10 \ 3  03-page045
Extremely faint and illegible typed document.9th Aug 1937Box 10 \ 3  03-page046
Urgent request for drawings of the valve mechanism of the Wraith engine.9th Aug 1937Box 10 \ 3  03-page047
Heavily faded document where the content is illegible.4th Aug 1937Box 10 \ 3  03-page048
List of drawings required for experiments on Wraith engine rockers and bottom tappets.4th Aug 1937Box 10 \ 3  03-page049
Experimental modification to valve rockers on the Wraith III to reduce valve lift.19th Aug 1937Box 10 \ 3  03-page051
Experimental modification to the Wraith III valve rockers to reduce valve lift.19th Aug 1937Box 10 \ 3  03-page053
Requesting the production of experimental Wraith tappet guides to test using the crankcase material directly.24th Aug 1937Box 10 \ 3  03-page055
Issues with Merlin engine fuel and requesting a sample of a different fuel type.18th Dec 1934Box 10 \ 3  03-page056
Instructions to fit different material tappet bushes to a Wraith III No. 6 unit for a comparative wear test.25th Aug 1937Box 10 \ 3  03-page057
Delay to engine/vehicle C.P.E.9 due to a leaking supplementary petrol tank.26th Feb 1913Box 10 \ 3  03-page058
Coolant jet tests for the Wraith III engine, comparing different jet configurations and recommending deletion from the specification.27th Aug 1937Box 10 \ 3  03-page059
The examination of Goshawk supercharger gears and proposed modifications to prevent fatigue cracks.28th Jun 1938Box 10 \ 3  03-page060
Examination of a broken exhaust valve from a Wraith vehicle following a failure.1st Sep 1937Box 10 \ 3  03-page061
Experimental condensed report on a 50-hour test and strip-down examination of a Condor III engine.23th Feb 1934Box 10 \ 3  03-page062
Urgent request to modify the Wraith valve gear by altering the rocker ratio.2nd Sep 1937Box 10 \ 3  03-page063
Confirming the dispatch of experimental 'B' pistons and connecting rods for an Eagle engine.8th Sep 1919Box 10 \ 3  03-page064
Modification to the tappets for the Wraith III model.6th Apr 1937Box 10 \ 3  03-page065
Minute detailing the Air Ministry's approval and required modifications for the Hucknall Extension project.26th Sep 1938Box 10 \ 3  03-page066
Modification to the tappets for the Wraith III model.4th Sep 1937Box 10 \ 3  03-page067
Instructions to representatives regarding the return procedure for defective or damaged material.31th Mar 1938Box 10 \ 3  03-page068
Instruction to chromium plate half a set of special bottom tappets for a 15,000 miles test on a Phantom III No.14 Unit.7th Sep 1937Box 10 \ 3  03-page069
Proposal to modify Wraith III valve guides by removing gland packings and experimenting with a new type on inlet valves only.7th Sep 1937Box 10 \ 3  03-page071
Page with completely faded and illegible text.10th Sep 1937Box 10 \ 3  03-page072
Laboratory report on the failure analysis of Wraith 26.C.VI KE.965 exhaust valves.10th Sep 1937Box 10 \ 3  03-page073
Confirmation memo regarding fitting dual ignition systems to Kestrel XIV, XV, and XVI engines.29th Aug 1935Box 10 \ 3  03-page074
Laboratory report showing photographs of a cracked and a broken exhaust valve from a Wraith.10th Sep 1937Box 10 \ 3  03-page075
Laboratory report featuring a cross-section photograph of a cast metal component.10th Sep 1937Box 10 \ 3  03-page077
Blank page or cover from a document.9th Sep 1937Box 10 \ 3  03-page078
Order for 10 - 4x17 wire wheels to be placed.9th Sep 1937Box 10 \ 3  03-page079
Instruction memo detailing modifications to the Wraith III Chassis, specifically valves and fittings.29th Sep 1937Box 10 \ 3  03-page081
Proposal to modify supercharger gear teeth for the Merlin engine to improve contact and increase service life.13th Nov 1939Box 10 \ 3  03-page082
Modifications to the Phantom and Wraith valve gear for improved lubrication.1st Oct 1937Box 10 \ 3  03-page083
Road test report on the first 20 HP Chassis, G.A.61, noting issues with the speedometer, clutch, and gearing.18th Nov 1924Box 10 \ 3  03-page084
Revised oil relief valves for the Wraith III to suit high front engine mounting.2nd Oct 1937Box 10 \ 3  03-page085
The testing of an experimental chassis.28th May 1921Box 10 \ 3  03-page086
The in-house production of Wraith III bottom tappets and the modification of drawing EW.1413.4th Oct 1937Box 10 \ 3  03-page087
Suggesting a revision to the wording for a notice about engines fitted with two-speed superchargers.3rd Sep 1929Box 10 \ 3  03-page088
Production instructions for an Oil Relief Valve for the Wraith III Chassis.15th Oct 1937Box 10 \ 3  03-page089
Modification record sheet, though the main content and list details are illegible.28th May 1934Box 10 \ 3  03-page090
Proposal for an experimental scheme to test a balancing cam on an existing Bentley engine.28th Oct 1937Box 10 \ 3  03-page091
Investigation into valve gear trouble on the Wraith III model due to a collapsing grummet.8th Nov 1937Box 10 \ 3  03-page093


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