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).
Three sample Make and Break Cam Followers made from American Bone Grey Fibre, comparing them to the existing red fibre.
| Identifier | ExFiles\Box 69\1\ scan0342 | |
| Date | 13th August 1924 | |
| X. 4646. EFC. BY1/H.{Arthur M. Hanbury - Head Complaints} 13.8.24. We are handing you herewith three sample Make and Break Cam Followers supplied to us by America, made in Bone Grey Fibre. We understand that you are testing these out, and therefore the further three samples will be of advantage to you. It is worth noting that this particular material is no better than the red fibre in regard to humidity effects. So far as we can judge from an examination of same, it appears to be structurally very much the same as ordinary hard red fibre, and as pointed out, is equally effective with the red fibre as bone grey. BY.{R.W. Bailey - Chief Engineer} | ||