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 note on 'bar rattles' and chatter experienced at various speeds and conditions.
| Identifier | ExFiles\Box 25\3\ Scan018 | |
| Date | 14th June 1911 | |
| B.R. 148 (20 H) (W57. 24.1.11) G 1410. <strike>Gear</strike> box X634 Bar rattles. - from S.B. 4100 Tested on 1649. - <strike>no stiffer wheel on wheel</strike> testing, crank shaft periods noticed distinct chatter in S.B. at. 660 revs. 22 m per hr. 670 revs. 22 m per hr. (22 axle) <strike>also bad,</strike> Under power. Also bad chatters on retard at various speeds after running at high speed. (? cured by taking off brake drum - done on <strike>other</strike> cars). E.P. 14/6/11 | ||