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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DescriptionDateIdentifier
Confirming agreements and discussing faults regarding condensers for the 40/50 & 20 HP chassis.14th Jun 1923Box 34 \ 1  Scan327
Producing and examining condensers for the first 50 cars to check for faults.14th Jun 1923Box 34 \ 1  Scan328
Test report for a returned condenser, confirming it is functioning correctly.6th Jul 1923Box 34 \ 1  Scan329
Note directing to a file regarding the Phantom Condenser for further correspondence.6th Jul 1923Box 34 \ 1  Scan330
Water outlet connections with rubber joints for the Falcon and Eagle engines.28th Jun 1916Box 34 \ 2  Scan001
Proposal to simplify water connections on jackets by replacing screw unions with steel tubes and clips.4th Jul 1916Box 34 \ 2  Scan002
Modifications to water connection fittings on the 'Hawk' aero engine.5th Jul 1916Box 34 \ 2  Scan003
Technical memorandum discussing improvements and alternative designs for water pipe clips.17th Jul 1916Box 34 \ 2  Scan004
Recommendation to adopt plain water connections without unions as standard on the Falcon and Hawk Engines.27th Dec 1916Box 34 \ 2  Scan005
Requesting a blueprint for a standardized plain water connection part for the Eagle engine, which is being tested in aluminium.1st Jan 1917Box 34 \ 2  Scan006
Design flaw in a standardized aluminium plain water connection for an experimental engine.5th Jan 1917Box 34 \ 2  Scan007
Standardisation of spherical type unions and a fault found in smaller gunmetal sizes.25th Jun 1925Box 34 \ 2  Scan008
Redesign, material changes, and testing of spherical seated unions for standardization.19th Dec 1925Box 34 \ 2  Scan009
The decision to omit pegs for locking pipe unions in aluminium castings.1st Aug 1926Box 34 \ 2  Scan010
The principle of using a taper pin to locate a nipple for a union in an aluminium boss.25th Aug 1926Box 34 \ 2  Scan011
New design for Spherical Seated Unions, comparing dimensions and thread standards.5th Jan 1927Box 34 \ 2  Scan012
Design, material, and standardization of new pipe unions.9th Jan 1927Box 34 \ 2  Scan013
Design and approval by Mr. Royce of spherical seated unions with reduced dimensions.12th Jan 1927Box 34 \ 2  Scan014
Experiment to enlarge drain holes on a hand magneto casing, as per Mr. Royce's instructions.6th Jun 1916Box 34 \ 2  Scan015
Internal memorandum regarding an issue with a hand magneto filling with oil.30th May 1916Box 34 \ 2  Scan016
Enlargement of drain holes in the hand magneto casing.15th Jun 1916Box 34 \ 2  Scan017
Quoting Mr Royce on rectifying an issue with a hand-starting magneto filling with oil.31th Jul 1916Box 34 \ 2  Scan018
Cancelled modification note for an Eagle Engine's hand magneto concerning larger drain holes.15th Aug 1916Box 34 \ 2  Scan019
Extract detailing the strength testing procedure for hand magnetos and starting gear.30th May 1916Box 34 \ 2  Scan020
Experiment involving prematurely firing an engine while it is being slowly revolved.6th Jun 1916Box 34 \ 2  Scan021
Request for a hand starter for an experiment on the RE 250 HP engine.19th Jun 1916Box 34 \ 2  Scan022
Instruction sheet confirming a 250 HP hand starter experiment is complete and ready for testing.15th Aug 1919Box 34 \ 2  Scan023
Agreement to cancel an engine experiment concerning premature firing due to difficulty obtaining the necessary equipment.1st Jan 1917Box 34 \ 2  Scan024
Cause of hand starter gear breakages on 'Eagle' engines and proposals for strengthening the components.3rd Jun 1916Box 34 \ 2  Scan025
The necessity of hardening sun wheel teeth and requesting information on worm and shaft failures.3rd Jun 1916Box 34 \ 2  Scan026
Initiating an experiment regarding hand starter gear breakages on Eagle engines.6th Jun 1916Box 34 \ 2  Scan027
Issues with bending wormwheel shafts on hand starters and the plan to replace them with strengthened versions.6th Jun 1916Box 34 \ 2  Scan028
Failed worm wheel shaft, clarifying a description error, and detailing old and new part numbers.8th Jun 1916Box 34 \ 2  Scan029
Cancellation notice for a static torque test on a hand starter's larger wormwheel shaft.27th Feb 1917Box 34 \ 2  Scan030
Arrangement for making six sets of continuous current revolution indicators for the Admiralty.13th May 1916Box 34 \ 2  Scan031
Instruction request for the production of five sets of Magneto Speedometers for 250 HP engines.21th Aug 1916Box 34 \ 2  Scan032
Advising Mr. Clark of an experimental Electrical Speed Indicator fitted to a 250 HP Engine A 2.12th Dec 1916Box 34 \ 2  Scan033
Instruction sheet for fitting experimental parts to a 260HP Engine A2.12th Dec 1916Box 34 \ 2  Scan034
Test report cover page for C.M. & C.M.1 Morganite brushes on a speedometer.11th Jan 1917Box 34 \ 2  Scan035
Confirmation of experiments fitted to an A2 engine, including an electrical speedometer and a wheelcase with lock nuts.11th Jan 1917Box 34 \ 2  Scan036
Successful bench test of a magneto speedometer and drive, with a suggestion for further testing on an aeroplane.30th Mar 1917Box 34 \ 2  Scan037
Extract regarding fitting an electrical speed indicator and a consumption tank to a car for testing.4th Jun 1918Box 34 \ 2  Scan038
Experimental parts fitted to chassis 7 C.A.13th Jun 1917Box 34 \ 2  Scan039
Extract detailing parts fitted to Mr. Royce's car, covering rear springs, shock absorbers, and an electrical speed indicator.15th Jun 1917Box 34 \ 2  Scan040
End play of a Hoffmann ball bearing for a magneto speedometer.4th Jul 1917Box 34 \ 2  Scan041
Letter from the Department of Aircraft Production enclosing an R.A.E. report on a Magneto Speedometer.2nd Aug 1918Box 34 \ 2  Scan042
Letter from the Department of Aircraft Production regarding a test report on a Magneto Speedometer.2nd Aug 1918Box 34 \ 2  Scan043
Letter to a tester regarding engine testing, a new radiator, an electric counter, and propeller trials.15th Aug 1918Box 34 \ 2  Scan044
Continued letter inquiring about the standard Eagle engine and the D.H.10 aircraft fitted with a Liberty engine.15th Aug 1918Box 34 \ 2  Scan045
Letter regarding the return of a magneto speedometer after testing at R.A.E.26th Sep 1918Box 34 \ 2  Scan046
Order for German Silver Resistance Wire for a Magneto Speedometer.19th Mar 1919Box 34 \ 2  Scan047
Voltage output particulars of the magneto speedometer, also known as a revolution counter.16th Aug 1922Box 34 \ 2  Scan048
Instructions detailing two generators for a Magneto Speed Indicator and their specific resistance values.5th Oct 1922Box 34 \ 2  Scan049
Specifications for a machine with aluminium end-plates, detailing its components.6th Nov 1918Box 34 \ 2  Scan050
Instructions detailing the characteristics of a Weston instrument, including its scale, voltage, current, and resistance.6th Nov 1918Box 34 \ 2  Scan051
Test results for a resistance bobbin, including calculations for volts, amperes, and a table of machine speed versus scale readings.6th Nov 1918Box 34 \ 2  Scan052
Test report for a Magneto Speed Indicator, detailing resistance adjustments and reading corrections.12th Oct 1922Box 34 \ 2  Scan053
Detailed specification for a Magneto Speed Indicator and its D.C. generator component.17th Oct 1922Box 34 \ 2  Scan054
The resistance characteristics and calibration of a Weston instrument.17th Oct 1922Box 34 \ 2  Scan055
Report page discussing eddy currents in an armature core, with a diagram showing slot dimensions.17th Oct 1922Box 34 \ 2  Scan056
Letter from Hightensite Limited promoting their Ebonite and Hightensite goods and services.29th Aug 1919Box 34 \ 2  Scan057
Advertisement for Hightensite Ltd's ebonite separators for battery accumulators and other related parts.1st Aug 1919Box 34 \ 2  Scan058
Letter to The Hightensite Co., Ltd. requesting samples of various insulating materials.1st Sep 1919Box 34 \ 2  Scan059
Letter from Hightensite Limited regarding sending product samples and proposing to cover an ignition tube with Ebonite.5th Sep 1919Box 34 \ 2  Scan060
Letter from Hightensite Limited regarding the dispatch of samples and an offer for Ebonite covering for ignition tubes.24th Sep 1919Box 34 \ 2  Scan061
Inquiry for a sample of ebonite covering for ignition tubes.6th Sep 1919Box 34 \ 2  Scan062
Letter to Messrs. Hightensite Limited acknowledging receipt of mouldings and enquiring about the supply of sample Ebonite Mouldings.30th Sep 1919Box 34 \ 2  Scan063
Record of Hightensite and Ebonite moulding samples with inserts sent by post.8th Oct 1919Box 34 \ 2  Scan064
Letter from Hightensite Limited regarding samples of Ebonite and Hightensite mouldings with embedded metal.30th Sep 1919Box 34 \ 2  Scan065
Experimental ebonite-covered ignition tube supplied by Messrs. Hightensite Ltd.13th Nov 1919Box 34 \ 2  Scan066
Examination of an ignition tube ebonite cover supplied by Messrs Hightensite Ltd.15th Nov 1919Box 34 \ 2  Scan067
Feedback on an ebonite-covered ignition tube supplied by Messrs. Hightensite Ltd.18th Nov 1919Box 34 \ 2  Scan068
Quality of ebonite covered ignition tubes from The Hightensite Co. Ltd.27th Nov 1919Box 34 \ 2  Scan069
Assessing a sample tube and concluding it is as good as the current material being used.27th Nov 1919Box 34 \ 2  Scan070
Letter from Hightensite Limited following up on a quotation for a sample Ebonite-covered Ignition Tube.8th Nov 1919Box 34 \ 2  Scan071
Letter from Hightensite Limited regarding a quotation for covering Ignition Tubes with Ebonite.30th Oct 1919Box 34 \ 2  Scan072
Quotation from Hightensite Limited for covering steel ignition tubes with Ebonite.30th Oct 1919Box 34 \ 2  Scan073
Letter from Hightensite Limited regarding the machining, polishing, and delivery of tubes.24th Oct 1919Box 34 \ 2  Scan074
Letter forwarding a booklet from Hightensite Ltd. on improvements in insulating material.1st Jun 1921Box 34 \ 2  Scan075
Booklet from Hightensite Limited regarding improvements in insulating materials.15th Jun 1921Box 34 \ 2  Scan076
Sending samples of Hightensite sheet and tubing for testing.15th Jun 1921Box 34 \ 2  Scan077
Forwarding a letter and samples of a heat-resisting material from Hightensite Ltd.21th Jun 1921Box 34 \ 2  Scan078
Copy of a letter from Hightensite Limited regarding a heat-resisting material, with samples sent for testing.20th Jun 1921Box 34 \ 2  Scan079
Requesting a report on the testing of samples from Hightensite Ltd.11th Jul 1921Box 34 \ 2  Scan080
Instruction regarding the delayed testing of 'Hightensite' samples.12th Jul 1921Box 34 \ 2  Scan081
Extract discussing the positioning of bolt holes and accessibility of ignition plugs for the Eagle engine.30th Mar 1915Box 34 \ 2  Scan082
Extract regarding alternative ignition setups for the Eagle engine's sparking plugs.22th Apr 1915Box 34 \ 2  Scan083
Requesting remarks on a small, porcelain type, Hobson aero engine ignition plug.18th Feb 1916Box 34 \ 2  Scan084
Unsatisfactory performance of ignition plugs for aero engines.18th Feb 1916Box 34 \ 2  Scan085
Potential solutions for sparking plug overheating, including suggestions from Mr. Royce.9th Sep 1916Box 34 \ 2  Scan086
Letter discussing the 'B' Eagle engine, focusing on ignition plug improvements after a 24-hour test run.11th Sep 1916Box 34 \ 2  Scan087
Spark plug insulation materials, fixing methods, and alternative washer suggestions for engine testing.15th May 1916Box 34 \ 2  Scan088
From 'R' to 'Hs' requesting a photostat copy of an enclosed sketch for Mr. Hives.15th Feb 1916Box 34 \ 2  Scan089
Experiment for an ignition plug firing in a pocket.22th Sep 1916Box 34 \ 2  Scan090
Follow-up letter from chemical engineers Guthrie & Co. regarding a lack of response on a sparking plug proposal.10th Aug 1917Box 34 \ 2  Scan091
The testing, repair and performance of a 260 HP Mercedes engine, including power curve data and spark plug analysis.10th Dec 1917Box 34 \ 2  Scan092
Analysis of engine performance, focusing on spark plug placement, compression ratios, and induction, comparing against a Mercedes engine.10th Dec 1917Box 34 \ 2  Scan093
Letter proposing a newly designed aero sparking plug.7th Apr 1918Box 34 \ 2  Scan094
Unreliability of sparking plugs and test methods to observe failure modes in 'Eagle' cylinders.8th May 1918Box 34 \ 2  Scan095
Technical report on the performance of various spark plugs, observing their temperature characteristics and pre-ignition points.8th May 1918Box 34 \ 2  Scan096


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