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).
Bar chart illustrating the gain or loss in lap speed (M.P.H.) for the 10 E.X. model under various configurations.
| Identifier | ExFiles\Box 69\4\ scan0191 | |
| Date | 7th September 1927 | |
| STANDARD CONDITION HOOD DOWN. C.O OPEN TAIL UNDERSHIELD AND WINGS ON H.P TYRES AND LOUVRED BONNET. GAIN OR LOSS IN LAP SPEED M.P.H. OVER STANDARD CONDITION GAIN LOSS C.O. CLOSED: LOSS 3.25 HOOD UP: LOSS 1.50 PLAIN BONNET: LOSS 1.00 UNDERSHIELD OFF: LOSS .50 TAIL OFF: LOSS .94 BALLOON TYRES: LOSS .82 FRONT WINGS OFF: GAIN 1.00 EFFECT OF VARIOUS CONDITIONS ON THE SPEED OF 10 E.X. STAMP: ROLLS-ROYCE, LIMITED PRINT ROOM 7 SEP 1927 | ||