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).
The poor quality of Goshawk engine tappets, detailing issues with non-hardened, incorrectly sized nuts, screws, and spanners.
| Identifier | WestWitteringFiles\I\June1922\ Scan52 | |
| Date | 2nd June 1922 | |
| To By.{R.W. Bailey - Chief Engineer} & Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} RB{R. Bowen} c. to Sj. Wor.{Arthur Wormald - General Works Manager} Da.{Bernard Day - Chassis Design} c. to Ev.{Ivan Evernden - coachwork} Sp.{Mr Spinney} Hy.{Tom Haldenby - Plant Engineer} RECEIVED JUN 8 ORIGINAL R1/M2.6.22. RE NO. 4. GOSHAWK TAPPETS. X4226 On readjusting the tappets of this engine I was very disappointed in the lasting qualities of the parts. The hexagons of the nut and screw were not hardened, they were too small in depth for long life and the spanner did not fit them. I am not surprised to hear that one worked loose in practice. This must be made a much better job - correct to size, and the spanners provided must also be correct to size. The depth of the hexagon should be increased in the nut at least. I found 3 spanners for which we were responsible all very slack (possibly nuts much undersize) and one of which I closed up by hammering together cold. This was the one for the 5/16 check nut. With good fitting spanners and good hexagons, the work should be quite easy to carry out with precision. R.{Sir Henry Royce} | ||