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).
Wear measurements for engine bores and pistons for chassis B.86.G.A.
| Identifier | ExFiles\Box 103\2\ scan0099 | |
| Date | 11th December 1934 | |
| REPORT RE WEAR IN BORES & PISTONS. Fitter: Haggar. Chassis No: B.86.G.A. Date: 11.12.34 Job No: 7709 Total Mileage: 24650 after before: 16136 8,514 BORE TABLE: BORE | NOMINAL | TAPER | OVAL | M | C | T 1 | E.B.2929 | 3.510" | +.005 | .002 | 1 | 1 | 5 2 | H.S. | " | +.005 | .001 | N | 1 1/2 | 5 3 | " | " | +.0045 | .0005 | N | 1 | 4 1/2 4 | " | " | +.005 | .0015 | 1 | 1 | 5 5 | " | " | +.004 | .001 | N | 1 | 4 6 | " | " | +.004 | .001 | H | N | 4 SMALL ENDS:- Satisfactory REMARKS:- PISTONS TABLE: PISTONS. | TYPE. | TOP. | BOTTOM. 1 | E.B. 2844. | -.004 | -.003 2 | | -.004 | -.004 3 | | -.004 | -.004 4 | | -.003 | -.004 5 | | -.005 | -.005 6 | | -.004 | -.004 Signature: [Signature] | ||