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
Testing of malleable iron exhaust manifolds for a Phantom II to prevent fractures caused by thermal expansion.17th Apr 1931Box 14 \ 6  Scan193
Delay of improved exhaust manifolds for P. 1. & G. 1. models due to illness.23th Apr 1931Box 14 \ 6  Scan194
Comparison of engine capacity, downtake, and swanneck dimensions for the 40/50 and 20/25 models.6th May 1931Box 14 \ 6  Scan195
Standardization of extended exhaust tail pipes for P.2 & 25 HP models.2nd Jun 1931Box 14 \ 6  Scan196
Increased cost of a hinged support for exhaust tail pipes on Phantom II and 25 HP models.5th Jun 1931Box 14 \ 6  Scan197
Power loss in the Phantom II exhaust system and the need to reduce back pressure.13th Jun 1931Box 14 \ 6  Scan198
Graph of power tests on a PI Unit, comparing performance with an open exhaust against a standard silencer system.15th Jun 1931Box 14 \ 6  Scan199
Page marked with a receiving stamp from the H.T. Room in Derby.15th Jun 1931Box 14 \ 6  Scan200
From Sg. to Hs. regarding Hancock's report on valve clearance issues under hard usage.14th Jul 1931Box 14 \ 6  Scan201
Modifications to the P. 2. long duration camshaft to improve engine performance.21th Jul 1931Box 14 \ 6  Scan202
Experiments in France to fix exhaust valves losing clearances, suggesting salt-cooled valves from the 'R' engines as a solution.22th Jul 1931Box 14 \ 6  Scan203
Inquiring about the progress of an investigation into frequent complaints about the short life of exhaust silencers.6th Aug 1931Box 14 \ 6  Scan204
Design and material of exhaust valves for the P.2 model following a 10,000-mile test.13th Aug 1931Box 14 \ 6  Scan205
Suggestion to address power limitation on the Phantom II by trying cooler, possibly salt-cooled, valves.17th Aug 1931Box 14 \ 6  Scan206
Improved exhaust and inlet valves and the potential need for a longer duration cam due to their increased weight.1st Aug 1931Box 14 \ 6  Scan207
Standardisation of chassis parts, specifically for a lengthened rear exhaust pipe.27th Jun 1931Box 14 \ 6  Scan208
Replacement of Staybrite exhaust downtake pipes with fescolised steel pipes for Phantom II and 20/25 HP chassis.8th Oct 1931Box 14 \ 6  Scan209
The failure of experimental 'fescalised' mild steel exhaust pipes during testing.9th Oct 1931Box 14 \ 6  Scan210
The failure of a mild steel exhaust chamber and the need for further experimental work.9th Oct 1931Box 14 \ 6  Scan211
Note about testing a new mild steel front suspension member and pipe for a 15,000-mile run.9th Oct 1931Box 14 \ 6  Scan212
Power loss in the P.2 exhaust system and the effect on continental type cars with existing silencers.9th Oct 1931Box 14 \ 6  Scan213
Graph showing the results of power tests on a PII unit, comparing performance with an open exhaust versus a standard silencer.9th Oct 1931Box 14 \ 6  Scan214
Blank document page with a purple date stamp from Derby.9th Oct 1931Box 14 \ 6  Scan215
Request to issue marked up prints for testing Phantom II exhaust system fittings without lagging.12th Oct 1931Box 14 \ 6  Scan216
Providing marked-up blueprints for Phantom II exhaust fittings and experiment instructions.13th Oct 1931Box 14 \ 6  Scan217
Suggesting a testing method for the P.2 exhaust system to identify the source of significant horsepower loss.1st Oct 1931Box 14 \ 6  Scan218
Requirement for larger exhaust silencers on the P. 2 and 25HP cars.20th Oct 1931Box 14 \ 6  Scan219
Distortion issues and the need for stiffening the Phantom II exhaust system flange.22th Oct 1931Box 14 \ 6  Scan220
Request to manufacture a modified exhaust fish-tail with a 50% larger outlet area for testing on a Continental P.II.2nd Nov 1931Box 14 \ 6  Scan221
Tests on the Phantom II exhaust system to investigate power losses and potential improvements.2nd Nov 1931Box 14 \ 6  Scan222
Graph plotting Brake Horse Power and Brake Mean Effective Pressure against RPM to show power losses from different exhaust system configurations.2nd Nov 1931Box 14 \ 6  Scan223
Blank document page with a purple ink stamp from the Print Room in Derby.2nd Nov 1931Box 14 \ 6  Scan224
Performance graph analyzing losses in a Phantom II short type silencer exhaust system.2nd Nov 1931Box 14 \ 6  Scan225
Performance graph analysing power losses in a Phantom II short type silencer exhaust system.2nd Nov 1931Box 14 \ 6  Scan226
Cover sheet with a 'Print Room' stamp.2nd Nov 1931Box 14 \ 6  Scan227
Exhaust silencers for P. 2. & 'U' Series 25HP, suggesting spot welding instead of riveting.20th Nov 1931Box 14 \ 6  Scan228
Request to make an experimental silencer for a Phantom II car with a 2.50' downtake pipe.27th Nov 1931Box 14 \ 6  Scan229
Blueprint for an experimental silencer designed to suit a 2.50 inch diameter intermediate pipe.25th Nov 1931Box 14 \ 6  Scan230
Proposed modification to the Phantom II exhaust system to reduce noise.27th Nov 1931Box 14 \ 6  Scan231
Blueprint of a PTT exhaust system with small diameter pipes.27th Nov 1931Box 14 \ 6  Scan232
The results of tests on exhaust system losses using a 114° camshaft.2nd Dec 1931Box 14 \ 6  Scan233
Performance graph comparing a full exhaust system against a manifold-only system with the cut-out open.30th Nov 1931Box 14 \ 6  Scan234
Stamped by the print room.1st Dec 1931Box 14 \ 6  Scan235
Performance graph analyzing a short type exhaust system under various configurations.30th Nov 1931Box 14 \ 6  Scan236
Almost entirely faded document with a 'Print Room' stamp in the bottom right corner.1st Dec 1931Box 14 \ 6  Scan237
Quarterly complaints report regarding noise issues with the Phantom II exhaust cut-out system.1st Feb 1932Box 14 \ 6  Scan238
The discontinuation of exhaust cutouts on 40/50's (Phantom II) from the N.2 series onwards.2nd Feb 1932Box 14 \ 6  Scan239
Customer complaints about the Phantom II exhaust cut-out and proposing a modification.2nd Feb 1932Box 14 \ 6  Scan240
Work on intake & exhaust silencers and steering systems for cars.14th Apr 1932Box 14 \ 6  Scan241
Work and modifications for a P.2 resonance-type exhaust silencer.20th Apr 1932Box 14 \ 6  Scan242
Blueprint for a fishtail exhaust adaptor for 40/50 or 25 HP models.22th Apr 1932Box 14 \ 6  Scan243
Largely blank or faded document with a date stamp from the Print Room.22th Apr 1932Box 14 \ 6  Scan244
Blueprint of a double resonance unit designed to be fitted onto a pipe.22th Apr 1932Box 14 \ 6  Scan245
Blueprint showing two pipe assemblies, one standard and one for a 25 HP application with a fishtail exhaust.22th Apr 1932Box 14 \ 6  Scan246
Largely illegible or blank document with a 'Print Room' date stamp.22th Apr 1932Box 14 \ 6  Scan247
Modifications to resonance type exhaust silencers for long and short Phantom II chassis.25th Apr 1932Box 14 \ 6  Scan248
Request to modify exhaust pieces for the Phantom II Resonance Exhaust System according to specific sketches.1st Jun 1932Box 14 \ 6  Scan249
Duplicate report detailing a series of comparative tests on exhaust systems for two experimental car models.8th Jun 1932Box 14 \ 6  Scan250
Log of daily tests conducted on an exhaust system, modifying components and measuring performance improvements.29th Oct 1931Box 14 \ 6  Scan251
Series of tests on exhaust system configurations, materials, and their performance.1st Nov 1931Box 14 \ 6  Scan252
Test results for different straight-through exhaust pipe configurations and a cast iron expansion box.26th Nov 1931Box 14 \ 6  Scan253
Proposed changes to the 40/50 exhaust system, from Staybright to Mild Steel, to eliminate noise.9th Jun 1932Box 14 \ 6  Scan254
Phantom II exhaust system and silencer design for the 20/25 and 40/50 models.29th Jul 1932Box 14 \ 6  Scan255
Continued note on testing a Silver Ghost, detailing a 7 BHP performance increase by modifying a pipe.29th Jul 1932Box 14 \ 6  Scan256
Graph of resonance silencer exhaust tests comparing BHP and back pressure against RPM.20th Apr 1927Box 14 \ 6  Scan257
Stamped document from the print room in Derby.8th Aug 1932Box 14 \ 6  Scan258
Exhaust valve failure on a Phantom II during an endurance run.2nd Aug 1932Box 14 \ 6  Scan259
Chrome iron exhaust manifold that failed during testing due to contraction and shrinkage.6th Sep 1932Box 14 \ 6  Scan260
Instructions for five new features to be incorporated into the Continental type Phantom II chassis, including the exhaust system.20th Sep 1932Box 14 \ 6  Scan261
Standardisation sheet for a non-resonant type of silencer to be fitted on all continental cars.22th Sep 1932Box 14 \ 6  Scan262
Standardisation and testing of the Phantom II resonance type silencer for Continental cars.23th Sep 1932Box 14 \ 6  Scan263
Fix for stretching exhaust valves on customer cars by fitting new heavy-type valves and stronger tappet springs.23th Sep 1932Box 14 \ 6  Scan264
Agreeing to standardise the P.II. resonance type silencer for the Continental model.27th Sep 1932Box 14 \ 6  Scan265
Proposal to modify exhaust valve guides and cylinder bosses for the Phantom model following a test failure.1st Oct 1932Box 14 \ 6  Scan266
P.2 exhaust valve guides overheating and the potential benefits of trying salt cooling.14th Oct 1932Box 14 \ 6  Scan267
Experimental work carried out on Phantom model valves and guides to resolve rattling and seizure issues.14th Oct 1932Box 14 \ 6  Scan268
Fitting of new exhaust valves and a modification to the valve guides to prevent rattling.14th Oct 1932Box 14 \ 6  Scan269
Accompanying two unnumbered blueprints for a P.2. resonance type silencer and swan neck.20th Oct 1932Box 14 \ 6  Scan270
Standardisation of a new type exhaust valve and stronger tappet springs for standard cars.22th Sep 1932Box 14 \ 6  Scan271
Standardisation of chassis parts form detailing costs and fitting dates for new parts on an O.2. Series chassis.19th Nov 1932Box 14 \ 6  Scan272
Standardisation of chassis parts, specifically improved exhaust valves made in S/SLV.6th Sep 1932Box 14 \ 6  Scan273
Report form concerning the standardization of chassis parts.25th Jan 1933Box 14 \ 6  Scan274
Requirement for elongated silencers due to body designs with luggage lockers and potential exhaust issues.25th Jan 1933Box 14 \ 6  Scan275
Exhaust system fumes and booms on Phantom models with overhanging backs.30th Jan 1933Box 14 \ 6  Scan276
Testing of extended exhaust pipes on Phantom models to address exhaust booming.6th Feb 1933Box 14 \ 6  Scan277
Experiments on the Phantom exhaust system for chassis 104-MY.22th Feb 1933Box 14 \ 6  Scan278
Vibration boom period issue with Phantom II chassis 12-MY.4th Mar 1933Box 14 \ 6  Scan279
Procedure to potentially reduce 'booming' in new cars and requesting information on its effectiveness.23th Feb 1933Box 14 \ 6  Scan280
Vibration boom periods, an invitation to test a new car, and the use of rubber for insulation.24th Feb 1933Box 14 \ 6  Scan281
Arrangement to test an extended exhaust pipe on a 20 MY car.24th Feb 1933Box 14 \ 6  Scan282
To J.L.E. arranging a trial of extended exhaust pipes on a 20.MY model.27th Feb 1933Box 14 \ 6  Scan283
Arranging a visit to London to test a trials car fitted with extended exhaust pipes.28th Feb 1933Box 14 \ 6  Scan284
Follow-up memo regarding the testing of extended exhaust pipes on a 20 MY vehicle.3rd Mar 1933Box 14 \ 6  Scan285
Design and testing of extended exhaust pipes and fishtails.6th Mar 1933Box 14 \ 6  Scan286
Fitting of extended 'fish tail' exhaust pipes on the 40/50 HP chassis.9th Mar 1933Box 14 \ 6  Scan287
Standardisation of a complete exhaust system with a resonant silencer to reduce cost and exhaust boom.22th Sep 1932Box 14 \ 6  Scan288
Record detailing the introduction of a new part to a chassis series, including costs and testing date.19th Nov 1932Box 14 \ 6  Scan289
Tests and issues with extended exhaust pipes, leading to a decision to cease providing them.4th Apr 1933Box 14 \ 6  Scan290
Modifications to the exhaust swan neck on chassis GLR-56 for Miss Lucy Logan.5th Apr 1933Box 14 \ 6  Scan291
Preparation and despatch of an extended exhaust pipe for chassis GLR-56, belonging to Miss Lucy Logan.6th Apr 1933Box 14 \ 6  Scan292


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