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).
Testing and failures of rear shock absorbers, specifically issues with bolts stretching and levers working loose.
| Identifier | WestWitteringFiles\D\February1920\ Scan0 | |
| Date | 1st February 1920 | |
| R R.{Sir Henry Royce} 235 A (100 T) (S.F 846 6-8-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2460 ORIGINAL To P From Hs.{Lord Ernest Hives - Chair} C. to CS. C. to EH C. to DA{Bernard Day - Chassis Design} C. to ST C. to IH C.R. Hsl/LG2. 2.20. 4 X.3461. RE REAR SHOCK ABSORBERS. X.3443 X.1331 We are running a set of these shock absorbers on the bumping rig. They are fitted with all the latest modifications. After 6 hours running we noticed that the levers were slightly slack where they fix on the square end of the rotor. We tightened up the bolt very tightly and ran on again for another 2 hours and found that they had worked slack again. It appears as though the bolt stretches. 2.EX Car which is running the 10,000 miles has also had trouble with the rear shock absorbers. The explanation which has been given is that the bolt stretched and the lever worked loose on the rotor and that the biting-in-bolt was not let into the square end of the rotor sufficiently so that the lever fell off altogether. The drawing shews the biting-in-bolt let in .050". For the lever to have come right off, it does not appear as though this could have been carried out, until we see the pieces it is impossible to say. We have found a case where the large diameter taper bolt which fixes the bracket to the axle has worked loose. At present this is a drilled bolt but it does appear that it would be better if it was solid. X.1295 We are asking the rear shock absorbers to do a lot of work now the maximum friction is 95 lbs. If we abandon the Contd. | ||