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
Log sheet detailing the results and failures during a bumper test on vehicle springs and shock absorbers.30th Aug 1920Box 119 \ 2  scan0125
Log sheet detailing component failures, repairs, and total run times over several days in August 1920.26th Aug 1920Box 119 \ 2  scan0126
Log detailing the total running hours of fittings on a bumper chassis.12th Jan 1921Box 119 \ 2  scan0127
Front bumper spring test report detailing Brinell hardness and run time.4th Oct 1920Box 119 \ 2  scan0128
Front bumper spring test report detailing specifications and results after a durability test.21th Sep 1920Box 119 \ 2  scan0129
Bumper test report for a front chassis spring, detailing Brinell hardness and test results for each leaf.14th Oct 1920Box 119 \ 2  scan0130
Results of a bump test on new bronze engine feet for the 40/50 chassis.27th Sep 1920Box 119 \ 2  scan0131
Test report detailing the results of bumper spring tests on a front chassis.14th Oct 1920Box 119 \ 2  scan0132
Bumper test report on a 10-leaf spring (F.5629), detailing Brinell hardness and failures after a timed run.16th Oct 1920Box 119 \ 2  scan0133
Log from a bump test performed on a front chassis, detailing observations and component failures over time.2nd Oct 1920Box 119 \ 2  scan0134
Test report on a front bumper, new engine rear suspension brackets, and Dunlop wire wheels with 72 spokes.20th Oct 1920Box 119 \ 2  scan0135
Log sheet detailing the results of a bumper test, including component failures over time.23th Nov 1920Box 119 \ 2  scan0136
Bumper test results for 11 leaves detailing their Brinell hardness and condition after a timed run.26th Nov 1920Box 119 \ 2  scan0137
Bumper test report for an 11-leaf spring, showing Brinell hardness and failure results.23th Dec 1920Box 119 \ 2  scan0138
Log detailing the total running hours of various fittings on a Bumper Chassis.12th Jan 1921Box 119 \ 2  scan0139
The results of a bumper test on a Goshawk 11 chassis, noting spring and steering lever failures.26th Oct 1921Box 119 \ 2  scan0140
Bumper test for the Goshawk 11 chassis, detailing failures of front springs and steering levers.28th Oct 1921Box 119 \ 2  scan0141
Results of a bumper test on the Goshawk 11 chassis.28th Oct 1921Box 119 \ 2  scan0142
The Goshawk 11 chassis bump test, detailing failures of the rear spring and a front support bracket after 48 hours.1st Nov 1921Box 119 \ 2  scan0143
Modification to the Goshawk 11 front cross member after a bump test failure.6th Nov 1921Box 119 \ 2  scan0144
Request to order 12 spare top leaves for the Goshawk due to breakages.16th Nov 1921Box 119 \ 2  scan0145
Broken rear spring bracket being sent to Mr. Royce for examination.16th Nov 1921Box 119 \ 2  scan0146
Bump test for the Goshawk 11, detailing bracket and rear spring failures.17th Nov 1921Box 119 \ 2  scan0147
Goshawk 11 bump test, reporting a fractured front axle and the need for urgent modifications.26th Nov 1921Box 119 \ 2  scan0148
Failed bump test for the Goshawk 11 chassis, detailing a recurring frame fracture at the dumb iron.1st Dec 1921Box 119 \ 2  scan0149
The results of a bump test on a Goshawk 11 chassis frame.1st Dec 1921Box 119 \ 2  scan0150
Cracked radiator fixing gusset plate found after a Goshawk 11 chassis bump test.7th Dec 1921Box 119 \ 2  scan0151
Broken frame on a Goshawk 11 chassis after a bump test, with recommendations to improve material quality and thickness.12th Dec 1921Box 119 \ 2  scan0152
Intentional flexibility and consistent breakages of the Goshawk II radiator fixing following a bumping test.12th Dec 1921Box 119 \ 2  scan0153
Instructions and record of a 'Goshawk II' front bumping test, detailing parts fitted and breakages over time.14th Dec 1921Box 119 \ 2  scan0154
Instruction sheet detailing parts required due to breakage for a customer's vehicle.14th Dec 1921Box 119 \ 2  scan0155
The bump test failures of the Goshawk 11, with a comparison to the 40/50 HP chassis.15th Dec 1921Box 119 \ 2  scan0156
Potential failures on the Goshawk car and the need for modifications before production.15th Dec 1921Box 119 \ 2  scan0157
Component breakages and their time to failure during a bump test on a Goshawk front chassis.15th Dec 1921Box 119 \ 2  scan0158
Test log detailing failures on a 40/50 Bumper Chassis Front over running hours.10th Dec 1920Box 119 \ 2  scan0159
Log of failures recorded during a bumping test on the rear of a 40/50 chassis.15th Dec 1921Box 119 \ 2  scan0160
Bump test for the Goshawk 11, comparing its failures to the standard 40/50 HP chassis.15th Dec 1921Box 119 \ 2  scan0161
Potential fatal flaws in the Goshawk car and the need for pre-production modifications.15th Dec 1921Box 119 \ 2  scan0162
Log of breakages and remarks from a bump test on a Goshawk chassis front.15th Dec 1921Box 119 \ 2  scan0163
Test report logging component failures on a 40/50 front bumper chassis over a 94-hour period.10th Dec 1920Box 119 \ 2  scan0164
Log of failures recorded during a 100-hour bumping test on a 40/50 chassis.28th Dec 1921Box 119 \ 2  scan0165
Bump test for the Goshawk 11, detailing a frame fracture after modification.28th Dec 1921Box 119 \ 2  scan0166
50-hour Coshawk 11 bumping test detailing spring bracket performance and subsequent spring failures.2nd Feb 1922Box 119 \ 2  scan0167
Copy of a letter from J. Woodhead & Sons Ltd. regarding a set of springs sent for a bumping test.6th Feb 1922Box 119 \ 2  scan0168
Instruction note detailing a Gos. II rear bump test with a log of hours run and parts tested.14th Feb 1922Box 119 \ 2  scan0169
105-hour bumping test of a Goshawk II chassis, detailing spring failures and future test plans.2nd Feb 1922Box 119 \ 2  scan0170
To Mr. Warwick requesting the equivalent speed of the chassis on the bumping rig.4th Apr 1922Box 119 \ 2  scan0171
The average speed of a Goshawk chassis on a bumper rig.6th Apr 1922Box 119 \ 2  scan0172
Bump test conducted on a Goshawk-11 chassis, detailing component failures over time.1st Sep 1922Box 119 \ 2  scan0173
Steering part failures and potential improvements for front shock absorbers.26th Nov 1923Box 119 \ 2  scan0174
Bump tests conducted on a 40/50 chassis equipped with 4-wheel brakes.26th Nov 1923Box 119 \ 2  scan0175
Experimental bump test report for a 40/50 HP model, detailing component failures over time.26th Nov 1923Box 119 \ 2  scan0176
Failures of springs and steering components during testing.26th Nov 1923Box 119 \ 2  scan0177
Bumping tests of a 40/50 chassis, detailing failures in steering and spring life.12th Jul 1923Box 119 \ 2  scan0178
Log of breakages from a bump test on a new front axle and brake scheme.2nd Jan 1924Box 119 \ 2  scan0179
Log sheet detailing breakages on springs and steering components for a 40/50 model.2nd Jan 1924Box 119 \ 2  scan0180
Log sheet detailing breakages of Woodhead springs and Houdaille shock absorbers during running time tests.2nd Jan 1924Box 119 \ 2  scan0181
Analysis of spring failures during testing, detailing average life and fracture positions.10th Mar 1924Box 119 \ 2  scan0182
The despatch of a frame section for examination.10th Mar 1924Box 119 \ 2  scan0183
Bumping test that caused failures in the front springs and chassis frame.1st Mar 1924Box 119 \ 2  scan0184
Drawing illustrating cracks found on a crank mechanism.13th Mar 1924Box 119 \ 2  scan0185
Weak point in a frame with springs anchored at the rear, proposing a stiffener design for further testing.13th Mar 1924Box 119 \ 2  scan0186
Bump test report on the front springs rear anchorage, detailing running time, failures, and average life.26th Mar 1924Box 119 \ 2  scan0187
Potential over-stressing of the Goshawk chassis with added weight and the consideration of destructive bumping tests.1st Jan 1924Box 119 \ 2  scan0188
Bump test for the 40/50 model's front brakes and chassis components.1st Apr 1924Box 119 \ 2  scan0189
Bump test detailing breakages for a new front spring rear anchorage scheme.1st Apr 1924Box 119 \ 2  scan0190
Log of component breakages detailing piece numbers and corresponding running times.1st Apr 1924Box 119 \ 2  scan0191
Log sheet detailing component breakages and failures during running tests.1st Apr 1924Box 119 \ 2  scan0192
Log sheet detailing component breakages, piece numbers, and running times.1st Apr 1924Box 119 \ 2  scan0193
Log of important component failures, excluding the frame and springs.1st Apr 1924Box 119 \ 2  scan0194
Bump test comparison report on the failure rates, lifespan, and fracture points of new Firth road springs versus standard pattern springs.1st Apr 1924Box 119 \ 2  scan0195
Summary report of frame failures observed during bump testing, with accompanying sketches.1st Apr 1924Box 119 \ 2  scan0196
Failures observed during a bump test on 40/50 front brakes, concerning a worm tube and cross steering lever.5th Apr 1924Box 119 \ 2  scan0197
Broken worm tube failure during bump tests on 40/50 front brakes.7th Apr 1924Box 119 \ 2  scan0198
Log of steering arm failures recorded during a bump test.28th Apr 1924Box 119 \ 2  scan0199
Bump tests and subsequent fracture analysis on road springs.30th Sep 1924Box 119 \ 2  scan0200
Comparing the hardness and life of Woodhead and Firth leaf springs.20th Sep 1924Box 119 \ 2  scan0201
Analysis and life comparison of Woodhead front springs detailing chemical composition and performance under various loads.10th Jun 1924Box 119 \ 2  scan0202
Bump tests of Woodhead design road springs, comparing failure rates and deflections with cams at 0° versus the standard 180°.10th Jun 1924Box 119 \ 2  scan0203
Results of previous bump tests on standard road springs.8th Oct 1924Box 119 \ 2  scan0204
Bump tests on road springs and proposing a new testing apparatus.10th Oct 1924Box 119 \ 2  scan0205
Bump tests conducted on road leaf springs.10th Oct 1924Box 119 \ 2  scan0206
Bump test report for 40/50 front springs, detailing test conditions and fracture analysis.9th Oct 1924Box 119 \ 2  scan0207
Bump test report on Woodhead 12 1/2% type front springs, detailing fracture analysis.8th Oct 1924Box 119 \ 2  scan0208
Bump tests for 12½% thin leaf front springs.14th Oct 1924Box 119 \ 2  scan0209
Bump test report for latest pattern Woodhead 12.5% type springs.14th Oct 1924Box 119 \ 2  scan0210
Results of a bump test on Woodhead springs, analyzing failure points and suggesting design modifications.16th Oct 1924Box 119 \ 2  scan0211
Page 2 of a memo detailing instructions for modifications to a tapering end.16th Oct 1924Box 119 \ 2  scan0212
Testing of front springs from two different manufacturers, Firth and Woodhead.16th Oct 1924Box 119 \ 2  scan0213
Comparing the reliability of Firths springs to Woodheads springs through bumping tests.27th Oct 1924Box 119 \ 2  scan0214
Bumping tests comparing 12 1/4% Firths road springs with Woodheads springs.29th Oct 1924Box 119 \ 2  scan0215
Bump test performed on the latest pattern Firth springs for 40/50 Front Springs.29th Oct 1929Box 119 \ 2  scan0216
Bump test report detailing fracture analysis on two Firth leaf springs.29th Oct 1924Box 119 \ 2  scan0217
The tests of front road springs from suppliers Firths and Woodheads.5th Nov 1924Box 119 \ 2  scan0218
Comparison table of particulars for 1150 lbs Firths and Woodhead front springs.5th Nov 1924Box 119 \ 2  scan0219
Tests on 12 1/4% thin leaf Woodhead springs following consistent failures.20th Nov 1924Box 119 \ 2  scan0220
Bumping tests for Firths 12¼% thin leaf front springs.21th Nov 1924Box 119 \ 2  scan0221
Bumping tests on Firths front springs, comparing them to Woodhead springs.26th Nov 1924Box 119 \ 2  scan0222
Bump test results for four special type Firth leaf springs.26th Nov 1924Box 119 \ 2  scan0223
Requesting the urgent repair of a bumping rig by the Millwrights.11th Nov 1924Box 119 \ 2  scan0224


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