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).
Chart showing the gain or loss in speed from altering a vehicle's standard configuration during Brooklands speed tests.
| Identifier | ExFiles\Box 29\3\ Scan168 | |
| Date | 8th September 1927 | |
| BROOKLANDS SPEED TESTS Handwritten Text: 788 Crosby STANDARD CONDITION = COMP RATIO 4.95-1 TURBULENT HEAD ALUM ENGINE SPORTS TAIL UNDERSHIELD SPECIAL WINGS C.O. OPEN R.R. CARB. DOUBLE VALVE SPRINGS TOTAL LOAD VALVE OPEN 110.7 LBS VALVE CLOSED 77.0 LBS TABLE: ALTERATION FROM STANDARD CONDITION ABOVE | GAIN OR LOSS IN M.P.H. FROM STANDARD CONDITION AS ABOVE ROW: BALLOON TYRES GAIN: NONE ROW: UNDERSHIELD OFF LOSS: .5 M.P.H. ROW: PLAIN BONNET LOSS: 1 M.P.H. ROW: 16 TOOTH AXLE LOSS: 1.4 M.P.H. * ROW: HOOD UP LOSS: 2.5 M.P.H. ROW: TAIL REMOVED LOSS: 2.5 M.P.H. ROW: C.O. CLOSED LOSS: 4 M.P.H. ROW: WINGS REMOVED GAIN: 3.3 M.P.H. ROW: REVERTING TO 10 E.X. OLD BODY LOSS: 7.4 M.P.H. ROW: NORMAL TOURING CAR LOSS: 11.4 M.P.H. * SEE REPORT RE CONDITIONS. | ||