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).
Test report on the life of front springs during bumping tests.
| Identifier | ExFiles\Box 119\2\ scan0014 | |
| Date | 27th May 1914 | |
| Wor{Arthur Wormald - General Works Manager}/Mcr5/L27514. May 27th. 1914 LIFE OF PARTS ON BUMPING TESTS. FRONT SPRINGS Central Solid Eyes. 3" Humps at 105 revs. per minute. Piece No. | Description. | Time Hrs. Mins. | Results. | Reference. F.4145 | Front Spring. | 12 - 0 | Broke top plate. | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}11/L9214 " | " | 13 - 15 | ditto. | " " | " | 11 - 40 | Cracked top plate. | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}4/L161213 " | Front Spring Top plate Vickers steel. | 5 - 50 | Broke top plate. | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}15/L17214. " | ditto. | 5 - 28 | ditto. | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}20/L3314. " | " | 4 - 57 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}15/L17214 " | " | 4 - 0 | " | " " | Front Spring, top plate Woodhead's steel. | 6 - 37 | " | " " | ditto. | 8 - 11 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}9/L20214 " | " | 8 - 25 | " | " | ||