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).
Summary of car body dimensions and design recommendations for the 19-EX Hooper Sedaica model.
| Identifier | ExFiles\Box 5\2\ 02-page237 | |
| Date | 19th March 1929 guessed | |
| contd :- 19-EX HOOPER SEDAICA A.{Mr Adams} Width between rails.......... 43.000 B. Thickness of finishers O.S...... 1.625 N.S...... .625 Width at elbow line........... 45.750 Door thickness................ 3.750 Like 14-G4 due to the abnormal finisher thickness on the offside, the driver has only the elbow room of a body of 44.750 at the elbow line. That is why the car seems more cramped than that on 18-EX although it is wider between the rails. SUMMARY. (1) Hooper doors are thicker than Barker doors. On experimental cars Barkers standard doors are like Hoopers but they say they propose adopting the doors made to our specifications. (2) No door need be more than 3.250 rail width (example 18-EX) (3) No finishers need be more than .375 thick. (4) Actual width at elbow line for 20 HP. bodies should be never less than 45.5 on closed bodies. (5) Actual width at elbow line on Phantom closed bodies should not be less than 46". (6) The signal window, with a box catch, which calls for such a thick finisher, as built by Hoopers, should not be fitted on any cars we are responsible for, and they should be asked to attempt to devise a smaller catch. (7) The Hobson window lifter, standard pattern, is heavy and clumsy. Other lighter and smaller types are as satisfactory, and save .500 on the door thickness. (8) Dropping rear quarter lights, with mechanical lifters, are not to be be commended as they call for complications and increased weight, while the amount they can drop owing to the close proximity of the wheel arch is too small to make them useful. As a matter of interest we measured the following cars in Hoopers showrooms for the actual width at elbow line of front seat: Bentley 6 1/2 litre............. 45.000 Daimler 35 HP............... 44.500 Lanchester.................. 44.000 Maximum RR. Phantom......... 47.500 DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} | ||