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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Letter to Joseph Sankey & Sons Ltd. regarding armature plates for dynamos.12th May 1933Box 62 \ 3  scan0354
Letter from Joseph Sankey & Sons Ltd. confirming the material analysis of Delco-Remy Armature laminations.12th May 1933Box 62 \ 3  scan0355
Letter from Joseph Sankey & Sons confirming they have sent samples of STALLOY and LOHYS brand steel for experimentation.22th May 1933Box 62 \ 3  scan0356
Letter to Joseph Sankey & Sons Ltd. acknowledging receipt of sample armature plates for comparative testing.24th May 1933Box 62 \ 3  scan0357
Request to transfer a vibrator controlled dynamo and C.A.V. vibrator unit from car 58-GN to Sg's new car 104-MY.9th Jun 1933Box 62 \ 3  scan0358
Dynamo control and charging schemes for the 25 HP and Phantom II chassis.13th Jun 1933Box 62 \ 3  scan0359
The dynamo control on the 40/50 chassis, addressing overcharging issues and the reasons for not adopting a three-rate charge system.15th Jun 1933Box 62 \ 3  scan0360
Proposal to improve commutation on the Phantom II and Bensport shunt dynamo by using four brushes instead of two.21th Jun 1933Box 62 \ 3  scan0361
Inspection and test specification for a large shunt dynamo.22th Jun 1933Box 62 \ 3  scan0362
Instructions for testing springs, insulation resistance, and the bedding of dynamo brushes.22th Jun 1933Box 62 \ 3  scan0363
Procedure for bedding and quieting dynamo brushes, including final testing under load.22th Jun 1933Box 62 \ 3  scan0364
Series of test procedures for a dynamo, covering electrical and mechanical performance.4th Jul 1933Box 62 \ 3  scan0365
Accompanying wiring diagrams for a new dynamo control scheme on the Bensport Chassis.4th Jul 1933Box 62 \ 3  scan0366
The production specification and testing for new shunt dynamos for the Bensport and 40/50 chassis.6th Jul 1933Box 62 \ 3  scan0367
Specification of inspection and tests for a large shunt dynamo.22th Jun 1933Box 62 \ 3  scan0368
Page 2 of instructions for testing springs and bedding brushes on a dynamo.22th Jun 1933Box 62 \ 3  scan0369
Procedure for the final bedding and testing of dynamo brushes and commutator.22th Jun 1933Box 62 \ 3  scan0370
Test procedures for a dynamo, outlining speed, voltage, and load conditions for mechanical and electrical checks.6th Jul 1933Box 62 \ 3  scan0371
Request for two Zenith sliding resistances for testing a new Bentley vibrator controlled dynamo.6th Jul 1933Box 62 \ 3  scan0372
Letter from supplier Joseph Sankey & Sons regarding the satisfaction of sample Armature Plates.13th Jul 1933Box 62 \ 3  scan0373
Letter to supplier Joseph Sankey & Sons Ltd. regarding a delay in testing stamped armature plates.14th Jul 1933Box 62 \ 3  scan0374
Modifications for the Phantom II vibrator control and electrical system for the 27-EX chassis.25th Jul 1933Box 62 \ 3  scan0375
Changes to the 20/25 type, including the ignition warning light, instrument board layout, and a list of related drawings.26th Jul 1933Box 62 \ 3  scan0376
Line drawing of the 40/50 model instrument board layout.28th Jul 1933Box 62 \ 3  scan0377
Outlining a 10,000-mile gold standard test for the Phantom II Vibrator Control installation.28th Jul 1933Box 62 \ 3  scan0378
Test results and performance data for a 20/25 Shunt Dynamo.31th Jul 1933Box 62 \ 3  scan0379
Request to modify a dynamo armature by using a thicker wire and widening the slots.31th Jul 1933Box 62 \ 3  scan0380
Performance issues with shunt dynamos for vibrator control, specifically regarding output at high speeds for night driving.1st Aug 1933Box 62 \ 3  scan0381
Instrument board layout for the Phantom II, questioning the starter button position and proposing the addition of a cubby hole.3rd Aug 1933Box 62 \ 3  scan0382
Proposal to improve the performance of a 20/25 Shunt Dynamo.9th Aug 1933Box 62 \ 3  scan0383
Request for 9 springs and 6 distance pieces to be made for a Bensport Dynamo spring coupling.10th Aug 1933Box 62 \ 3  scan0384
Layout of the starter button and cubby hole for the Phantom II Vibrator Control.23th Aug 1933Box 62 \ 3  scan0385
Potential fault with the brakes on the Bentley dynamo pinion.25th Aug 1933Box 62 \ 3  scan0386
Error in providing special parts for the Bentley chassis damping brake on the dynamo pinion.28th Aug 1933Box 62 \ 3  scan0387
Preliminary experiments comparing stamped slotted armature plates with milled slotted plates for shunt dynamos.28th Aug 1933Box 62 \ 3  scan0388
Letter to Joseph Lucas Ltd. regarding the testing and modification of two special ammeters.1st Sep 1933Box 62 \ 3  scan0389
Letter to Joseph Lucas & Co. Ltd. concerning test results of a C.A.V. voltage regulator.5th Sep 1933Box 62 \ 3  scan0390
Letter detailing the decision to standardize a regulator on both Bentley and 40/50 chassis due to safety concerns with the existing dynamo.9th Sep 1933Box 62 \ 3  scan0391
Dynamo charging requirements for tank engines.9th Sep 1933Box 62 \ 3  scan0392
Proposition to the War Office regarding experimental work on a new machine and its funding.9th Sep 1933Box 62 \ 3  scan0393
Request to rewind the armature on an experimental Bensport & 40/50 dynamo with new specifications.14th Sep 1933Box 62 \ 3  scan0394
Standardisation of a shunt dynamo controlled by a C.A.V. type B constant voltage vibrator regulator.24th Sep 1932Box 62 \ 3  scan0395
Standardisation form for chassis parts.1st Jul 1933Box 62 \ 3  scan0396
Urgent request to experiment with a new dynamo armature to supersede the existing 40/50 and Bensport dynamo due to poor high-speed performance.29th Sep 1933Box 62 \ 3  scan0397
Instruction to modify a 20/25 HP Dynamo by winding it with a dummy coil to improve commutation.18th Oct 1933Box 62 \ 3  scan0398
Experiments and proposed modifications to improve dynamo performance.20th Oct 1933Box 62 \ 3  scan0399
Proposal to supersede the existing Bentley dynamo with a new experimental machine.20th Oct 1933Box 62 \ 3  scan0400
Modification instructions for the dynamo lubrication on a 40-50 HP Chassis.30th Oct 1933Box 62 \ 3  scan0401
Instruction to modify the armature end connections on an experimental Bensport Dynamo PB1.30th Oct 1933Box 62 \ 3  scan0402
Specification of inspection and tests for a large shunt dynamo.31th Oct 1933Box 62 \ 3  scan0403
Inspection and testing procedures for dynamo components including springs and brushes.31th Oct 1933Box 62 \ 3  scan0404
Procedure for the main bedding of dynamo brushes.31th Oct 1933Box 62 \ 3  scan0405
Test procedures for dynamo brush bedding, output calibration, and noise assessment.31th Oct 1933Box 62 \ 3  scan0406
Instructions for examining and testing a dynamo's insulation, components, and end cover fit.13th Dec 1933Box 62 \ 3  scan0407
Request for electrical particulars for a 20/25 HP tank engine dynamo.13th Dec 1933Box 62 \ 3  scan0408
Work request to have the commutator skimmed on Experimental Bentley Dynamo No.P.2.28th Dec 1933Box 62 \ 3  scan0409
Material supply and standardisation for a new vibrator control dynamo for the 20/25 HP D.2. Series chassis.9th Jan 1934Box 62 \ 3  scan0410
Lack of road and bench testing experience for a new dynamo for the 20/25 Chassis (D.2 Series).11th Jan 1934Box 62 \ 3  scan0411
Chassis GUB-5 modifications, specifically moving the hand brake forward and a query about fitting a dynamo voltage regulator.22th Jan 1934Box 62 \ 3  scan0412
Future fitting of an up-to-date constant voltage controlled dynamo system to chassis GUB-5.22th Jan 1934Box 62 \ 3  scan0413
Production test specification for the new 40/50HP switchbox.29th Jan 1934Box 62 \ 3  scan0414
Production tests and inspection points for a 40/50 Switchbox designed for use with a Shunt Dynamo.27th Jan 1934Box 62 \ 3  scan0415
Instructions for testing electrical terminals and switch positions using a lamp.19th Feb 1934Box 62 \ 3  scan0416
Request to have the commutator skimmed on the 40/50 Experimental Dynamo No. XP15 for further brush tests.19th Feb 1934Box 62 \ 3  scan0417
Information notice for electricians regarding ammeter overload capacity and battery discharge from accessories.20th Feb 1934Box 62 \ 3  scan0418
Request to wind an experimental armature core for a 20/25 Tank Dynamo.15th Mar 1934Box 62 \ 3  scan0419
Experimental department report on laboratory bench tests of the R.R.Sch.481 dynamo.21th Mar 1934Box 62 \ 3  scan0420
The testing and development of a 20/25 Dynamo with voltage control.21th Mar 1934Box 62 \ 3  scan0421
Request to modify a dynamo with a new armature and brush bearing bracket to enable a tachometer drive to be fitted for testing on a Bentley chassis.27th Apr 1934Box 62 \ 3  scan0422
Proposal to test a new, smaller, and lighter dynamo on a Bentley chassis.25th Apr 1934Box 62 \ 3  scan0423
Instruction to fit a new vibrator controlled dynamo and unit to a 20/25 HP chassis.2nd May 1934Box 62 \ 3  scan0424
The standardisation of an eccentrically mounted dynamo drive pinion for 20/25 and 40/50 HP chassis.2nd May 1934Box 62 \ 3  scan0425
Impressions from a test run from Boulogne, noting engine detonations, bonnet rattles, and a significant overrun period.11th Jun 1934Box 62 \ 3  scan0426
Road test report evaluating the performance of the steering, clutch, brakes, dampers, and dynamo.18th Jun 1934Box 62 \ 3  scan0427
Urgent decision to fit a voltage-controlled electrical system to the 20/25 HP chassis.18th Jun 1934Box 62 \ 3  scan0428
The status of parts for a new fuse box and additional fuses.18th Jun 1934Box 62 \ 3  scan0429
Confirming the decision to standardise the constant voltage scheme for the 20/25 HP chassis.20th Jun 1934Box 62 \ 3  scan0430
Query regarding the start date for standardising the constant voltage scheme on the 20/25 HP chassis.22th Jun 1934Box 62 \ 3  scan0431
Confirming the introduction of chassis voltage control on the 20/25HP F.2 series chassis.23th Jun 1934Box 62 \ 3  scan0432
Requesting a status report on the results of modifications made to a dummy coil for dynamo commutation.28th Jun 1934Box 62 \ 3  scan0433
Results of tests on dynamo commutation, comparing different armature coil configurations.29th Jun 1934Box 62 \ 3  scan0434
Standardisation of a dynamo drive pinion to facilitate the quietening of engine gears.27th Jun 1934Box 62 \ 3  scan0435
Cost estimate for extra jigs, tools, and equipment for the standardization of a dynamo drive pinion.19th Jun 1934Box 62 \ 3  scan0436
Experimental department report on the air cooling of chassis dynamos for R.R. & Bentley models.23th Jul 1934Box 62 \ 3  scan0437
Bench tests to ascertain the effect of air cooling on the output of a Bentley dynamo.24th Jul 1934Box 62 \ 3  scan0438
Increasing dynamo output, discussing limits, air cooling, and recommending an experimental model with a fan.24th Jul 1934Box 62 \ 3  scan0439
The air cooling of R.R. & Bentley chassis dynamos.23th Jul 1934Box 62 \ 3  scan0440
Bench tests to ascertain the extent of increased output from a Bentley dynamo when cooled by an air stream.24th Jul 1934Box 62 \ 3  scan0441
Dynamo output limitations and a recommendation for an experimental air-cooled dynamo.24th Jul 1934Box 62 \ 3  scan0442
Letter from the Sales Director's office regarding a Bentley dynamo charging issue and satisfaction with new Jaeger instruments.2nd Aug 1934Box 62 \ 3  scan0443
Letter addressing dynamo trouble and arranging a change of headlamps to P.100 type.7th Aug 1934Box 62 \ 3  scan0444
Comparison between a proposed new smaller dynamo and the existing dynamo for a Bentley chassis.7th Sep 1934Box 62 \ 3  scan0445
Standardisation of a Shunt Dynamo to R.R.SCH.431 for a voltage controlled system.21th Jun 1934Box 62 \ 3  scan0446
Estimated cost for extra jigs, tools and equipment for the 'F' series.23th Jul 1934Box 62 \ 3  scan0447
Order request for armature stampings for an Experimental Spectre Dynamo.25th Sep 1934Box 62 \ 3  scan0448
Graph showing the output curves of two different shunt dynamos for various chassis models.21th Dec 1933Box 62 \ 3  scan0449
Blueprint for Armature Stampings D.B.511 and D.B.512.21th Dec 1933Box 62 \ 3  scan0450
Request to fit a dynamo from one chassis to another for testing purposes.28th Sep 1934Box 62 \ 3  scan0451
Preparations for a 10,000-mile test on car 21.G.IV, including work on the dynamo and voltage regulator.20th Oct 1934Box 62 \ 3  scan0452
Specification of inspection and test for a new small shunt dynamo.26th Oct 1934Box 62 \ 3  scan0453


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