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).
Tests and modifications to address high-speed wobbles.
| Identifier | ExFiles\Box 29\1\ Scan300 | |
| Date | 12th May 1927 | |
| 4457. To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rml/LG12.5.27. X457 X8420 HIGH SPEED WOBBLES. We have the following work we should like to do in connection with these tests. (1) Remove present axle and pivots from 98-NK and fit a standard axle with Westinghouse air springs on the front dumb irons (now in the Stores - dumb irons require drilling). (2) Arrange castor pivots taken off 98-NK. so that when fitted to the vertical pivot axle they give vertical wheels and centre point steering. You suggested that this might be done in the same way as on the previous vertical pivots by putting packings behing the stub axle. [Diagram of vertical centre-point] Vertical centre-point. (3) By means of a second packing, arrange the castor pivots on the vertical axle to give the wheels slightly leaning in at the top as per sketch. [Diagram showing wheel lean] Wheels lean in 3° (4) Fit spring and bob weight to pivot on bumper chassis axle. (5) Arrange disc wheel hubs so that we can pack the disc wheels out 2" from their std. position. P.T.O. | ||