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).
Measured wear on six pistons from a Shop Car.
| Identifier | ExFiles\Box 35\2\ scan 240 | |
| Date | 27th October 1920 | |
| OCT 27 To Hs.{Lord Ernest Hives - Chair} From RHC.{R. H. Coverley - Production Engineer} X.2448 R.F.E. RHC{R. H. Coverley - Production Engineer}2/LG27.10.20. RECEIVED. X2448 RE SHOP CAR PISTONS. With reference to the pistons which were taken off the Shop Car and which you requested should be measured up - we give below the amount of wear on the piston skirt - | | Top. | Bottom. | Aver:wear. | |---|---|---|---| | 1. | .0015 | .00225 | .001875 | | 2. | .001 | .00225 | .0016 | | 3. | .00175 | .00275 | .00225 | | 4. | .0015 | .003 | .00225 | | 5. | .0015 | .00225 | .00187 | | 6. | .00225 | .0035 | .00237 | RHC.{R. H. Coverley - Production Engineer} R.R. 252A (100 'D' SHS) H.{Arthur M. Hanbury - Head Complaints} 139. H.{Arthur M. Hanbury - Head Complaints} 11-20. G.2800 | ||