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 1294 of 2367        Sort by   Box   Date   Description

Filter      from        to             identifier   [all]
DescriptionDateIdentifier
Strengthening a 20 HP chassis crankshaft to eliminate a 'bus' knock, noting it is still an experimental issue.26th May 1930Box 103 \ 3  scan0003
Test report on a 25 HP Nitralloy crankshaft for the China Engine C.11.21th Jun 1930Box 103 \ 3  scan0004
Comparison of wear marks on a standard crankshaft versus a Nitralloy crankshaft.31th Aug 1931Box 103 \ 3  scan0005
Crankshaft webs fouling the stiffening ribs on the China Engine Unit.2nd Jul 1930Box 103 \ 3  scan0006
Potential solutions for crankshaft vibration in a 25HP engine when approaching 70MPH.1st Oct 1930Box 103 \ 3  scan0007
Design decisions and improvements for the 25HP chassis and engine.12th Nov 1930Box 103 \ 3  scan0008
List of proposed engineering changes and improvements to various engine and chassis components.18th Dec 1930Box 103 \ 3  scan0009
Outlining the features of a proposed balanced crankshaft for a 25 HP engine.18th Dec 1930Box 103 \ 3  scan0010
Blueprint of a 20 HP crankshaft with 8 balance weights.17th Dec 1930Box 103 \ 3  scan0011
Proposed design and trial of an interlaced crankshaft for 6 and 12 cylinder engines.1st Dec 1930Box 103 \ 3  scan0012
Crankshaft balancing, materials, and vibration issues for 25HP and 45HP engines.20th Dec 1930Box 103 \ 3  scan0013
Engine and suspension improvements for the 25HP and 45HP models.23th Dec 1930Box 103 \ 3  scan0014
Design and balancing of a 25HP & 45HP crankshaft.23th Dec 1930Box 103 \ 3  scan0015
Engine crankshaft balancing, counterweights, and flywheel modifications for smoother high-speed operation.7th Jan 1931Box 103 \ 3  scan0016
Polar diagrams of big end bearing loads for the Condor III engine.7th Jan 1931Box 103 \ 3  scan0017
Polar diagram of main bearing loads for the Condor III engine.18th May 1923Box 103 \ 3  scan0018
Polar diagram showing the main bearing loads for the Condor III engine.17th May 1923Box 103 \ 3  scan0019
Polar diagram of main bearing loads for the Condor III engine at 1900 R.P.M.16th Jul 1924Box 103 \ 3  scan0020
Polar diagram showing the main bearing loads for the Condor III engine.16th Jul 1924Box 103 \ 3  scan0021
Resetting the friction load on a low inertia crankshaft damper.13th Jan 1931Box 103 \ 3  scan0022
Torsional periods found on a 25 HP unit with 12 balance weights.15th Jan 1931Box 103 \ 3  scan0023
Standardisation of chassis parts for the 20/25 HP Chassis, specifically the Low Inertia Spring Drive.15th Jan 1931Box 103 \ 3  scan0024
Decision not to proceed with the production of a new part, including associated costs.15th Jan 1931Box 103 \ 3  scan0025
Tests on 25 HP crankshaft dimensions and critical speeds.15th Jan 1931Box 103 \ 3  scan0026
Report analyzing crankshaft pin sizes, balance weights, and their effect on critical speed and inertia.15th Jan 1931Box 103 \ 3  scan0027
Design of a crankshaft damper and spring drive for the Japan 3 project.15th Jan 1931Box 103 \ 3  scan0028
Design of a simplified crankshaft damper and spring drive for the Japan 3 project.1st Jan 1931Box 103 \ 3  scan0029
Design improvements for the 'Japan Engine', focusing on crankshafts, bearings, and structural stiffness.21th Jan 1931Box 103 \ 3  scan0030
Sketch of a starter handle shaft tube and a telegram discussing design simplification for economical production.21th Jan 1931Box 103 \ 3  scan0031
Confirmation of a telegram suggesting tests on available China crankshafts with different pin diameters.22th Jan 1931Box 103 \ 3  scan0032
Revisions to the Japan 3 general engine scheme, specifically regarding shaft diameters and cylinder skirts.22th Jan 1931Box 103 \ 3  scan0033
Telegram from Elliott to Hives suggesting tests on available China crankshafts with different pin diameters.22th Jan 1937Box 103 \ 3  scan0034
The 'Japan 3' crankshaft, attaching a print showing the pinion formed solid with the shaft.24th Jan 1931Box 103 \ 3  scan0035
Design of crankshaft pinions and timing gears to address flywheel vibration issues on a 25HP engine.26th Jan 1931Box 103 \ 3  scan0036
Four comparative cross-sectional sketches of a journal and flywheel flange with annotations.27th Jan 1931Box 103 \ 3  scan0037
Sending an experimental double rear crank bearing for testing on a 20/25 engine.27th Jan 1931Box 103 \ 3  scan0038
Investigation into three schemes for crankshaft balance weights for the 'China IV' engine, including a comparative table of bearing loads.9th Mar 1931Box 103 \ 3  scan0039
Comparative load tests on a new crankshaft design (Des.1364) and the instruction for a new shaft for development.9th Mar 1921Box 103 \ 3  scan0040
Blueprint comparing three different balance weight schemes.9th Mar 1921Box 103 \ 3  scan0041
Secret memorandum discussing design proposals for a crankshaft damper and engine suspension system.14th Mar 1931Box 103 \ 3  scan0042
Technical note on the application and effects of crankshaft balance weights for aero and car engines.2nd Apr 1931Box 103 \ 3  scan0043
Analysis of crankshaft balancing schemes for a 7-bearing, 6-cylinder engine.2nd Apr 1931Box 103 \ 3  scan0044
Discussion and comparison of different crankshaft balancing schemes, including one for aero use and another used by Chrysler.2nd Apr 1931Box 103 \ 3  scan0045
Comparison of five alternative crankshaft balance weight schemes.2nd Apr 1931Box 103 \ 3  scan0046
Comparison table of bearing loads for various crankshaft balancing schemes.2nd Apr 1931Box 103 \ 3  scan0047
Secret memo referencing a print about crankshafts and bearings.9th Apr 1931Box 103 \ 3  scan0048
Objectives and different schemes for using engine balance weights.12th Apr 1931Box 103 \ 3  scan0049
Request to fit an eight balance weight scheme on a large pin 25 HP crankshaft.5th May 1931Box 103 \ 3  scan0050
Scheme detailing the balance weight setup for a 25 HP shaft.4th May 1931Box 103 \ 3  scan0051
Data sheet detailing torsional periods, balance metrics, and weights for Phantom II and 25 HP engine components.1st May 1931Box 103 \ 3  scan0052
Road tests of a 25 HP crankshaft to determine its critical speed and torsional oscillation.9th May 1931Box 103 \ 3  scan0053
Blueprint for a Crankshaft Balance Weight for a 20 HP Chassis.12th May 1931Box 103 \ 3  scan0054
Technical memorandum detailing component specifications and modifications for the 25 HP - JAPAN 1 model.12th May 1931Box 103 \ 3  scan0055
Modifications to the crankchamber, brakes, rear axle, and petrol pump.2nd May 1931Box 103 \ 3  scan0056
Use and testing of balance weights on crankshafts for the 25 HP and Phantom II engines.16th May 1931Box 103 \ 3  scan0057
Crankshaft balance weights and critical speeds for the 25 HP and Phantom 11 engines.16th May 1931Box 103 \ 3  scan0058
Schematic drawing and calculations for crankshaft balance weight schemes.16th May 1931Box 103 \ 3  scan0059
Engine smoothness, the effects of balance weights on the flywheel, and various weight schemes.18th May 1931Box 103 \ 3  scan0060
Design and experimentation of engine balance weights, comparing 8 and 12 weight schemes.19th May 1931Box 103 \ 3  scan0061
Flywheel balance weights and design improvements for the 25 HP engine.19th May 1931Box 103 \ 3  scan0062
Technical memorandum on the effect of balance weights on flywheel wobble in Phantom II and 25 HP models.23th May 1931Box 103 \ 3  scan0063
Flywheel and crankshaft testing, comparing performance with 0, 6, and 12 balance weights.23th May 1931Box 103 \ 3  scan0064
Request to rebuild a cast iron crankcase unit with parts from a 16-G4 engine.27th May 1931Box 103 \ 3  scan0065
Requesting the production of twelve balance weights for a 25 HP crankshaft.29th May 1931Box 103 \ 3  scan0066
Fitting twelve balance weights to the big pin 25 HP crankshaft.29th May 1931Box 103 \ 3  scan0067
Insufficient material found on 20/25HP crankshaft forgings and the necessary alterations to existing dies.9th Jul 1931Box 103 \ 3  scan0068
Experiments using balance weights to eliminate flywheel vibrations on a 25 HP engine.22th Jul 1931Box 103 \ 3  scan0069
Blueprint for balance weights for a 25 HP crankshaft.23th Jul 1931Box 103 \ 3  scan0070
Sketch of balance weights used on the big pin 25 HP crankshaft.23th Jul 1931Box 103 \ 3  scan0071
Modifications to the 25 HP crankshaft to improve high-speed smoothness.4th Aug 1931Box 103 \ 3  scan0072
Blueprint for a stiffer 2-inch pin crankshaft for a 25 HP engine.5th Aug 1931Box 103 \ 3  scan0073
Proposal outlining potential performance improvements for the 25 HP car model.5th Aug 1931Box 103 \ 3  scan0074
Intentions and methods for balancing crankshafts, comparing different approaches.17th Aug 1931Box 103 \ 3  scan0075
Experimental crankshafts for the 20/25 HP chassis, concluding with a decision to alter the dies.19th Aug 1931Box 103 \ 3  scan0076
Internal memorandum discussing engine vibration issues on the 25HP model, focusing on balance weights and flywheel wobble.19th Aug 1931Box 103 \ 3  scan0077
Scheme for attaching intermediate half weights to an existing 20/25 crankshaft on the Chrysler principle.1st Aug 1931Box 103 \ 3  scan0078
Suggestion to produce future car crankshafts, particularly for the 25 HP model, from hardened material based on successful testing.21th Aug 1931Box 103 \ 3  scan0079
Crankshaft balance weights, test results, and production decisions for various engine models.21th Aug 1931Box 103 \ 3  scan0080
Scheme for fitting Chrysler type balance weights to a crankshaft, including a diagram of the webs.22th Aug 1931Box 103 \ 3  scan0081
Scheme for 20/25HP balance weights and a stiffer crank, based on the Chrysler principle.22th Aug 1931Box 103 \ 3  scan0082
1/2 balance weights for fitting to an IV-G6 crankshaft.22th Aug 1931Box 103 \ 3  scan0083
Analysis of three failures concerning the low inertia damper spring plate.24th Aug 1931Box 103 \ 3  scan0084
The production of crankshafts in nitrogen hardening steel for the 20/25 HP engine.24th Aug 1931Box 103 \ 3  scan0085
Confirming instructions to hold up production of 25 HP crankshaft dies due to a design alteration.26th Aug 1931Box 103 \ 3  scan0086
Tests on flywheel vibration and the effect of different balance weight configurations on a 25 HP engine.27th Aug 1931Box 103 \ 3  scan0087
Blueprint diagram showing three numbered line graphs or schematics.27th Aug 1931Box 103 \ 3  scan0088
Design and application of balance weights for the 20/25 HP crankshaft.27th Aug 1931Box 103 \ 3  scan0089
On harmonic balancer designs, comparing American cars and considering options for a 25 HP engine.27th Aug 1931Box 103 \ 3  scan0090
Balance weight schemes for the 25HP engine, covering production, experimental, and new shaft designs.28th Aug 1931Box 103 \ 3  scan0091
Sending a print of drawing LeC. 2938, concerning the J.3. crankcase, cylinder block, and crankshaft.29th Aug 1931Box 103 \ 3  scan0092
Instruction to manufacture a crankshaft for a new unit, 18-G4.29th Aug 1931Box 103 \ 3  scan0093
On a general scheme for crankcase, cylinder block and crankshaft, noting updates to rear main bearings and timing gear lubrication.5th Sep 1931Box 103 \ 3  scan0094
Request to issue a detail drawing for a 20/25 HP Crankshaft with a list of required modifications.9th Sep 1931Box 103 \ 3  scan0095
Modifications to a 20/25 crankshaft using existing forgings.9th Sep 1931Box 103 \ 3  scan0096
Proposal from Mr. Elliott for a balanced crankshaft for the 20/25 model.10th Sep 1931Box 103 \ 3  scan0097
Alterations to crankshafts for the future 'China' series.14th Sep 1931Box 103 \ 3  scan0098
Modifications to the 'China' modified crankshaft, including increasing web width and adjusting oilway drilling.16th Sep 1931Box 103 \ 3  scan0099
Providing instructions for machining a 25 HP crankshaft to specific dimensions and drawings.19th Sep 1931Box 103 \ 3  scan0100
Test of Chrysler balance weights on a 25 HP engine to eliminate flywheel vibration.21th Sep 1931Box 103 \ 3  scan0101
Manufacturing scheme for 20/25 HP crankshafts and holding the sinking of dies for further production.22th Sep 1931Box 103 \ 3  scan0102


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