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).
Comparative performance test report between the 19-EX and a standard Phantom chassis.
| Identifier | ExFiles\Box 113\2\ scan0155 | |
| Date | 29th May 1929 | |
| Hs.{Lord Ernest Hives - Chair} from Mx.{John H Maddocks - Chief Proving Officer} X1725 29th May 1929. COMPARATIVE TESTS OF 19-EX and STANDARD PHANTOM CHASSIS We have today compared 19-EX with Phantom Chassis No. 73-OR - incidentally this is the car that Rm.{William Robotham - Chief Engineer} and myself used in making comparative temperature tests two days ago. The weight of 19-EX car complete without passengers was 2 tons. 7 cwts. 3 qrs. 4 lbs - the Phantom Chassis was loaded up to the same weight. We found that fast cornering on hills with 19-EX was very unstable as compared with the Phantom Chassis - although on Marchington Hill on one test each car rounded a rather bad bend at the same speed - 19-EX slid right across the road, whilst the Phantom Chassis was perfectly steady. STANTON HILL. Start. Finish. Time. 19-EX. 10 m.p.h. 30 m.p.h. - 73-OR. 10 " 30 " - 1st TICKNALL 19-EX. 10 m.p.h. 55 m.p.h. 38 secs. 73-OR. 10 " 52 " 38 " 2nd TICKNALL 19-EX. 10 " 60 " 55 " 73-OR. 10 " 59 " 59 " HANBURY 19-EX. 10 " - 54 " 73-OR. 10 " - 64 " MARCHINGTON 19-EX. 20 " - 52 " 73-OR. 20 " - 55 " MARCHINGTON 19-EX. 10 " - 56 " 73-OR. 10 " - 62 " We also made some comparative acceleration tests, chassis side by side, starting at 10 m.p.h. up to 23 m.p.h. the Phantom and S/S are equal. Starting at 20 m.p.h. chassis were equal until we were about 23 m.p.h then the S/S gained. Starting at 30 m.p.h. the S/S started to gain immediately. Mx{John H Maddocks - Chief Proving Officer} | ||