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).
Modifications to the radiator, luggage grid, and gearbox mechanism.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan19 | |
| Date | 1st July 1925 | |
| R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF HGM/LG6. 7. 25. C the same as 'V' series. The radiator cap has been modified. It is arranged that when the radiator cap is screwed on it opens the vent to the radiator which is set at the correct level. This means that the radiator cannot be over-filled or at least, if it is over-filled, the level is automatically correct when the cap is screwed on. The radiator cap has slightly different dimensions than the present standard. The shutters are enclosed in the radiator and the method of operation is modified which does away with the rod at the back of the radiator. R-R design luggage grid. The rear end of the frame side channels have been extended to carry the luggage grid. We think this is a desir-able thing to do whatever type of luggage grid is fitted. The grid fitted to this car is enormously strong compared with the 20 HP. or the usual coachbuilders grid. The weight of it is not excessive - 14 lbs. It may however be possible to improve the appearance. The grid fouls the sockets and tail lamp connections. The exhaust outlet blows on to the lower rail of the grid when it is fixed downwards. There is a tendency, when the grid is worked up and down, for the bolts which hold the grid to unscrew owing to the stiff spring washer and taper socket. Gearbox and change gear mechanism. This box is fitted with torsionally free pinions and standard splines. The change gear mechanism has been made contd :- | ||