Performance graph comparing Road Wheel B.HP against Engine R.P.M. for various car configurations at Brooklands.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan140 | |
| Date | 18th November 1925 | |
| STAMP: ROLLS-ROYCE, LIMITED, PRINT ROOM, 18 NOV 1925, DERBY. HEADER: BROOKLANDS Nov. 1925 TABLE: CONDITION OF CAR | LAP SPEED | HALF MILE SPORTS CAR HIGH COMPRN. 17 TOOTH AXLE. STANDARD CONDITION C.O. Closed | 79.2 | 80.4 STANDARD CONDITION C.O. OPEN. | 80.5 | 82.6 STANDARD TOURING CAR 4-1 COMPRN 15 TOOTH AXLE. STANDARD CONDITION C.O. CLOSED | 74.13 SPORTS CAR FRONT WINGS REMOVED TOP PANEL OF WIND SCREEN RAISED. C.O. OPEN | 87.8 | 89.6 GRAPH AXES: Y-AXIS: ROAD WHEEL B.H.P. X-AXIS: ENGINE R.P.M. GRAPH ANNOTATIONS: Top Curve: C.O OPEN Middle Curve: C.O CLOSED Bottom Curve: C.O CLOSED Right Annotation: 2750 R.P.M. 89 M.P.H. 17 x 52 AXLE Lower Right Annotations: STANDARD CAR COMP. RAT. 4-1, HIGH COMPRESSION 5.2 - 1 WATERMARK: MADE IN GT. BRITAIN | ||
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).