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).
Outlining the extensive requirements and frustrations regarding the testing of Firths springs for the Goshawk 11.
| Identifier | ExFiles\Box 52\2\ Scan030 | |
| Date | 3rd January 1922 | |
| To Wd. {Mr Wood / Mr Whitehead} from Hs. {Lord Ernest Hives - Chair} c. to EY. c. to Wor. {Arthur Wormald - General Works Manager} c. to Roy. {Sir Henry Royce} c. to Ms/Dn. X4429 Hs {Lord Ernest Hives - Chair} 4/LGS3.1.22. FIRTHS SPRINGS FOR GOSHAWK 11. X4429 We should like to point out that it is quite impossible for us to make complete tests of Firths springs in a week. We have stated in a previous memo. that we should require Firths springs for three months before we could say they were satisfactory. It is also useless to think that we can report on one set of chrome vanadium and one set of silicon manganese springs. We want at least 6 sets of each because it is only by judging the average time for springs breaking that we can arrive at whether the springs are likely to be consistently reliable. It should be borne in mind that we have not got our bumping test waiting to test Firths springs. We have other parts of the chassis which require testing on the bumping rig and are equally as urgent as the road springs. We cannot understand how it is that Firths send us top leaves for springs and after it has cost a lot of time and money to test these out they agree that the brinell test and the fractured plates were too hard. Is it not possible for Firths to test the brinell and fracture some sample pieces before the leaves are sent to us? Hs. {Lord Ernest Hives - Chair} | ||