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).
Data table showing crankcase and clutch pit pressure readings at various speeds without a breather but with a scoop on the clutch pit.
| Identifier | ExFiles\Box 2\3\ B002_X 116 117 119 120-page07 | |
| Date | 30th December 1932 | |
| -2- Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}2/KT.30.12.32. Without Breather but with Scoop on clutch pit. Speed Crankcase Clutch Pit. M.P.H. Press. of water. Press. of water. 30 .... .1" (Due to .... .1" (Due to 40 .... .2" loss of .... .2" effect of 50 .... .2" suction .... .3" scoop 60 .... .2" from .... .2" fitted to 70 .... .2" carb.) .... .3" clutch pit). 75 .... .2" .... .3" Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} | ||