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).
Blueprint graph illustrating valve timing profiles relative to crankshaft angle around Top Dead Center (TDC).
| Identifier | ExFiles\Box 179\2\ img235 | |
| Date | 8th February 1929 | |
| INLET OPENING TDC (DEGREES) 260 280 300 320 340 360 380 400 R.H.R 8.2.29 | ||