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).
Engine compression test results, calculating cylinder capacity and recording gauge pressures for 1906 and 1907 type engines.
| Identifier | ExFiles\Box 19\7\ Scan002 | |
| Date | 10th April 1907 | |
| Engine Compressions. X790 4400 Test taken on No 6 (first run) 1907 type Capacity of cylinder (top of stroke) 1 pint Price's 'B' weighs 18 ozs. amt. used in cylr = 10.835 ozs ∴ cap. = 10.835 / 18 = •602 pints = 90 lbs. Above straffer with 1/16" liners = 73 by calculated over No 6 (1906) car 60537 (in for repairs) later 10/4/07. No 3. good compression, by gauge. 70 lbs. P. 1907 engine 60551 ground cylinders. & good compression. 60 lbs by gauge | ||