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).
Rolls-Royce Experimental Archives                
Choose Archive


Browsing Records        Page 2016 of 2367        Sort by   Box   Date   Description

Filter      from        to             identifier   [all]
DescriptionDateIdentifier
Letter to S. Smith & Sons, Ltd. requesting a sample electrical rev counter for laboratory tests.14th Nov 1935Box 165 \ 4  img334
Letter from S. Smith & Sons (Motor Accessories) Ltd regarding a sample Electrical Rev Indicator for testing purposes.15th Nov 1935Box 165 \ 4  img335
Letter from S. Smith & Sons regarding Electric Revolution Indicators and associated generators.15th Nov 1935Box 165 \ 4  img336
Letter to S. Smith & Sons regarding generator speed and instrument dial diameter for a sample instrument.18th Nov 1935Box 165 \ 4  img337
Letter from S. Smith & Sons concerning an Electrical Revolution Indicator and generator speed specifications.20th Nov 1935Box 165 \ 4  img338
Urgent calibration of a 100 m.p.h A.T. speedometer for an experimental chassis.22th Nov 1935Box 165 \ 4  img339
Letter from a speedometer company regarding a delay in re-calibrating an instrument due to special requirements.2nd Dec 1935Box 165 \ 4  img340
Requesting particulars on a new Jaeger chrono-electric aero engine revolution indicator for aircraft.4th Dec 1935Box 165 \ 4  img341
The failure and repair of a speedometer cable for an experimental Phantom III chassis.5th Dec 1935Box 165 \ 4  img342
Despatch note sending a speedometer cable to A.T. Speedometer Co. Limited for examination and report.7th Dec 1935Box 165 \ 4  img343
The purchase of Jaeger electric rev counters for aircraft.9th Dec 1935Box 165 \ 4  img344
The procurement of a Jaeger rev counter for aircraft.12th Dec 1935Box 165 \ 4  img345
Letter regarding the procurement of a Jaeger rev counter for aircraft.30th Dec 1935Box 165 \ 4  img346
Letter to a speedometer company regarding the failure of a recently recalibrated instrument and the lubrication of its cables.18th Dec 1935Box 165 \ 4  img347
Letter discussing a method to reduce noise from drives by lagging cable casings with rubber.20th Dec 1935Box 165 \ 4  img348
Letter from the A.T. Speedometer Co., Ltd. regarding a fault with a hand-made speedometer guard.20th Dec 1935Box 165 \ 4  img349
Letter from the speedometer supplier regarding cable lubrication and noise reduction.20th Dec 1935Box 165 \ 4  img350
Letter to A.T. Speedometer Co. Ltd. regarding speedometer cables and requesting a sample Bentley speedometer for testing.23th Dec 1935Box 165 \ 4  img351
Letter from The A.T. Speedometer Co. regarding a special canvas-rubber covered speedometer cable.30th Dec 1935Box 165 \ 4  img352
Letter from S. Smith & Sons regarding the progress of an Electric type Speedometer with recorder.6th Jan 1936Box 165 \ 4  img353
Internal memorandum regarding the failed testing of a Smith electrical rev-counter and its subsequent return.10th Jan 1936Box 165 \ 4  img354
Letter from S. Smith & Sons regarding the damping of an A.T. Speedometer needle.15th Jan 1936Box 165 \ 4  img355
Letter from S. Smith & Sons arranging a visit to discuss electric speedometers.27th Jan 1935Box 165 \ 4  img356
Letter from S. Smith & Sons rescheduling a visit to discuss electric speedometers.28th Jan 1936Box 165 \ 4  img357
Letter to Messrs. S. Smith & Sons, Ltd. regarding the postponement of a visit by Mr. V. Russell.28th Jan 1936Box 165 \ 4  img358
Letter from S. Smith & Sons arranging a visit to discuss Electric Speedometers.29th Jan 1936Box 165 \ 4  img359
Order be placed with A.T. Speedometer Co. Ltd. for a speedometer and specially insulated cables.17th Feb 1936Box 165 \ 4  img360
Testing an A.T. speedometer with increased damping and concluding it offers no significant improvement.21th Feb 1936Box 165 \ 4  img361
Proposing a new, adjusted rev-counter for car 3-B-IV due to incorrect readings after an alteration to the dynamo drive.29th Feb 1936Box 165 \ 4  img362
Internal request to send a covering order for a speedometer to A.T. Speedometer Co. Ltd.7th Apr 1936Box 165 \ 4  img363
Confirmation of an alternative tachometer drive for chassis S-B-IV with the wider frame and its running speed.24th Apr 1936Box 165 \ 4  img364
Investigation into the Phantom III speedometer drive running dry and the proposed modifications to resolve the issue.15th May 1936Box 165 \ 4  img365
Letter to the A.T. Speedmoeter Co. arranging a meeting to discuss noisy drives and comparing them to American units.15th Jun 1936Box 165 \ 4  img366
Letter from A.T. Speedometer Co. Ltd. regarding a visit by Mr. Arrowsmith.17th Jun 1936Box 165 \ 4  img367
Letter to A.T. Speedometer Co. Ltd. agreeing to the creation of a sample speedometer drive for testing, based on a part from an American Packard car.3rd Jul 1936Box 165 \ 4  img368
Letter from Foster Instrument Co Ltd advising they no longer make electrical revolution indicators and suggesting other suppliers.12th Aug 1936Box 165 \ 4  img369
Letter to Salford Electrical Instruments, Ltd. requesting particulars of electrical revolution indicators.13th Aug 1936Box 165 \ 4  img370
Letter acknowledging an enquiry for Electrical Revolution Indicators and forwarding it to the Birmingham branch.20th Aug 1936Box 165 \ 4  img371
Request to order and supply a replacement synchronous speed motor for the rev counter rig.16th Oct 1936Box 165 \ 4  img372
Request to place an order with Messrs. A.T. Speedometer Co. Ltd. for a Bentley rev-counter.16th Oct 1936Box 165 \ 4  img373
Request to order an A.T. Speedometer for Experimental Car 5-B-IV, specifying the back-axle ratio and calculated revolutions per mile.19th Oct 1936Box 165 \ 4  img374
Faulty speedometer from a Phantom III (36-EX) being returned for overhaul and repair.30th Oct 1936Box 165 \ 4  img375
Instruction to despatch a speedometer for overhaul as per order.3rd Nov 1936Box 165 \ 4  img376
Letter from Dobbie McInnes & Clyde Ltd to Bentleys Motors promoting the 'Farnboro' Electric Indicator for engine testing.3rd Nov 1936Box 165 \ 4  img377
Promotional leaflet for the 'Dobie-McInnes' 'Farnboro' Electric Indicator, detailing its use with time-base diagrams for high-speed engines.14th Dec 1934Box 165 \ 4  img378
Analysis of indicator diagrams showing the effects of fuel injection timing and engine speed on combustion pressures.1st Oct 1936Box 165 \ 4  img379
Investigation report into a Magneto unit that was cutting out during endurance tests.1st Oct 1936Box 165 \ 4  img380
Letter to the Air Ministry requesting a recommendation for a reliable method of checking revolution indicators.4th Nov 1936Box 165 \ 4  img381
Failed Hasler rev-counter on a test rig, requesting it be returned to the makers for repair.6th Nov 1936Box 165 \ 4  img382
Specification document for the speedometer drive on the Wraith II gearbox.23th Nov 1936Box 165 \ 4  img383
Faulty speedometer from Phantom car 32-EX reading 3 MPH fast.3rd Dec 1936Box 165 \ 4  img384
Experimental ignition parts dismantled from chassis 93-NK.23th Feb 1925Box 165 \ 5  img001
Requesting the deletion of the flexible earthing connection for the condenser from production instructions following a successful test.22th Sep 1926Box 165 \ 5  img002
Production test procedure for a paper dielectric condenser for battery ignition.15th Oct 1926Box 165 \ 5  img003
Testing procedures and specifications for condensers, detailing capacity and static charge retention checks at various temperatures.11th Jan 1928Box 165 \ 5  img004
Proposal to test paraffin wax-impregnated paper for use in ignition coils and condensers.11th Jan 1928Box 165 \ 5  img005
Proposal to test three coils and three condensers wound with wax paper as insulation.25th Jan 1928Box 165 \ 5  img006
To EFC regarding the dispatch of two P.W.P. condensers and the modification of coils to meet capacity limits.24th Feb 1928Box 165 \ 5  img007
Testing of new insulating papers from a British source for use in ignition coils and condensers.9th May 1928Box 165 \ 5  img008
Temperature leakage tests conducted on various insulating papers.8th May 1928Box 165 \ 5  img009
Properties of a new material and recommending tests before its adoption for coils and condensers.7th Jun 1928Box 165 \ 5  img010
Comparative tests of varnished and waxed papers for ignition coils and condensers.7th Jun 1928Box 165 \ 5  img011
Tests on various insulating papers to compare their performance under heat and electrical stress.31th May 1928Box 165 \ 5  img012
Test results on the conductance and dielectric strength of various papers after heating cycles.31th May 1928Box 165 \ 5  img013
Comparison of varnished and waxed papers for use in condensers and ignition coils, considering dielectric strength and temperature effects.8th Aug 1928Box 165 \ 5  img014
Instructing the construction of ignition coils and condensers, with a later handwritten amendment cancelling the condensers.8th Aug 1928Box 165 \ 5  img015
The testing and modification of paraffin waxed paper condensers for specific chassis.8th Jun 1929Box 165 \ 5  img016
Request for the production of two more paraffin waxed paper condensers for experimental chassis and bench testing.8th Jun 1929Box 165 \ 5  img017
The performance of paraffin waxed paper condensers for battery ignition systems.12th May 1930Box 165 \ 5  img018
Request to carry out condenser tests on a 20/25 HP chassis to observe effects on low-speed battery ignition.23th May 1930Box 165 \ 5  img019
Request for experimental tests on three condensers with modified capacities to improve contact point life.8th Sep 1930Box 165 \ 5  img020
The measured capacities of seven B.I. condensers borrowed from production.1st Sep 1930Box 165 \ 5  img021
Issues with production battery ignition condensers exceeding their capacity limits and proposing a new type of paraffin waxed paper condenser.24th Sep 1930Box 165 \ 5  img022
Requesting a second set of experimental condensers and detailing findings on ignition performance.24th Sep 1930Box 165 \ 5  img023
Letter to Mr. Minchin regarding ignition misfiring, 20 HP ignition duplication, and condenser capacity for tungsten points.24th Sep 1930Box 165 \ 5  img024
Letter regarding the testing of lower capacity condensers to address misfiring.24th Sep 1930Box 165 \ 5  img025
Request to obtain 2 rolls of 2-ply waxed paper for experimental condensers.26th Sep 1930Box 165 \ 5  img026
Clarifying condenser specifications, instructing the Works to reduce the number of turns from 28 to 25 and prioritize the capacity limit.29th Sep 1930Box 165 \ 5  img027
Fitting of a special waxed paper ignition condenser to chassis 18-GIV for standardization testing.10th Oct 1930Box 165 \ 5  img028
Performance of tungsten contact points in battery ignition systems and the required condenser capacity.4th Oct 1930Box 165 \ 5  img029
Investigation into condenser capacity, materials, and their effects on ignition distributor contact points.14th Oct 1930Box 165 \ 5  img030
Distributor bench tests investigating condenser capacity and its effect on screw point oxidation.4th Oct 1930Box 165 \ 5  img031
Condenser capacity testing on different chassis to address point oxidation and misfiring.4th Oct 1930Box 165 \ 5  img032
Letter to Mr. Minchin discussing 20 HP ignition, misfiring on the 20/25 model, and condenser capacity for tungsten points.24th Sep 1930Box 165 \ 5  img033
Letter to Messrs. Peto & Radford regarding the testing of lower capacity condensers to cure misfiring.24th Sep 1930Box 165 \ 5  img034
Request to supply two paraffin wax condensers of reduced capacity with specific materials.30th Oct 1930Box 165 \ 5  img035
10,000-mile test of paraffin waxed paper condensers, analysing capacity changes and contact point wear.26th Jan 1931Box 165 \ 5  img036
Request to fit a lower capacity paraffin wax paper ignition condenser and new tungsten contacts to chassis 20-EX.27th Jan 1931Box 165 \ 5  img037
Condensers for the 40-50 HP and 20 HP chassis, and a request for two modified condensers for a test car.22th Jun 1931Box 165 \ 5  img038
Standardisation of a paraffin waxed paper condenser, changing from .30 mf to .23 mf capacity with a reinforced case bottom.15th Oct 1931Box 165 \ 5  img039
Standardisation form for a reinforced case bottom part to improve surface condition.20th Jan 1932Box 165 \ 5  img040
Extract from a report on distributor contact points and condenser performance on an 18-GIV model after a 10,000-mile test.30th Jan 1931Box 165 \ 5  img041
The advantages and performance of lower capacity paraffin waxed paper condensers for ignition systems.9th Feb 1931Box 165 \ 5  img042
Battery ignition condenser's capacity and material composition.2nd Feb 1931Box 165 \ 5  img043
The results of a 10,000-mile test of a smaller capacity condenser for ignition distributors.29th Apr 1931Box 165 \ 5  img044
Returned Condenser from a 20/25 HP chassis, which was tested and found not to be faulty.14th May 1931Box 165 \ 5  img045
Explaining the failure to record mileage during a condenser change on chassis GLR-8.1st May 1931Box 165 \ 5  img046
Listing two suppliers for condenser tinfoil.9th Feb 1932Box 165 \ 5  img047
Requesting the production of three condensers for 'Japan III', listing the necessary parts and noting the need to order waxed paper.3rd Mar 1932Box 165 \ 5  img048
The construction of a new cylindrical condenser for the J.3. ignition system.14th Mar 1932Box 165 \ 5  img049


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙