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 on a Pontiac chassis.
| Identifier | ExFiles\Box 103\2\ scan0020 | |
| Date | 30th March 1939 | |
| REPORT RE WEAR IN BORES & PISTONS. ===================== Fitter: Podger Chassis No.: Pontiac (REG. J.K.5788) Job No.: 2588 Date: 30. 3. 1939 Mileage: 24,857 BORE TABLE: BORE | NOMINAL | TAPER | OVAL | M | C | T 1 | 3. 3/5 " | + .004" | NIL. | 1/2 | 4. 2 | " | + .0035" | NIL. | 1/2 | 2 1/2 3 | " | + .0035" | .0005" | 1/2 | 3 1/2 4 | " | + .0025" | .0015" | 1/2 | 2 1/2 5 | " | + .0025" | NIL | 1/2 | 2 1/2 6 | " | + .0025" | NIL. | 1/2 | 2 1/2 SMALL ENDS:- REMARKS:- PISTONS TABLE: PISTONS | TYPE | TOP | BOTTOM. 1 2 3 4 5 6 Signature: J.B | ||