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).
Power tests with a 38 HP 'Silent Knight' Daimler Car, fitted with an R-R silencer.
| Identifier | ExFiles\Box 126\4\ scan0027 | |
| Date | 3rd February 1912 guessed | |
| Power tests with 38 HP "Silent Knight" Daimler Car Compression - 68 sq. Abs: Igo: 78 lbs by gauge Fitted with R-R silencer - ½" snout, pipe reduced to suit Daimler exhaust pipe. Oil was poured into the cocks in the induction pipe during the whole of these tests - power dropped off considerably otherwise. Revs. | Ignition Mag. only | Water temp: | H-P cut-out open | H-P cutout closed | Carburation --- | --- | --- | --- | --- | --- 1000 | 25º BDP | 65 | 26.6 | -- | Standard 1250 | 30" | 65 | 31.3 | 29.9 | " 1500 | 40" | 65 | 32.2 | 30.5 | " 1750 | 40" | 65 | 33 | 31.4 | " 2000 | 40" | 65 | 29.9 | 27.3 | " 1500 | 40 BDP | 65 | 42.4 | -- | Jets No.1 - .02, Bottom strainer .05 1750 | 40" | 65 | 47.8 & 49.5 | | Handwritten notes: X432 2. OH, N.3 .05. Bottom strainer taken off Carburettor, free air admitted at extra air tap & flange of throttle slasher off to give extra air. RP (initials) | ||