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).
Graph showing Power at Road Wheels (B.HP) versus Engine R.P.M. for Standard and Continental Phantom models.
| Identifier | ExFiles\Box 92\2\ scan0003 | |
| Date | 1st February 1929 | |
| POWER AT ROAD WHEELS. STD AND CONTINENTAL PHANTOM WITH 5:1 COMPRN RATIO & 4.75 AXLE RATIO 15x52 Y-Axis: ROAD WHEEL B.H.P. X-Axis: ENGINE R.P.M Graph Data Labels: x 5:1 o 5:1 4.75:1 4:1 3RD GEAR Legend: R=4 ------- STANDARD PHANTOM CUTOUT CLOSED R=5.0 -o- CONTINENTAL PHANTOM CUTOUT CLOSED R=5.0 -x- CONTINENTAL PHANTOM CUTOUT OPEN R=4.75 xxxxxxxxx CONTINENTAL PHANTOM CUTOUT CLOSED Date/Signature Box: FEB. 1929 H | ||