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 for a car undergoing tests in France, comparing it to a recently returned vehicle.
| Identifier | ExFiles\Box 71\4\ scan0108 | |
| Date | 1st April 1925 | |
| R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. [Handwritten] x8940 REF. HS{Lord Ernest Hives - Chair}3LG/1.4.25. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BJ. c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} S E C R E T. EAC. 'V' SERIES - TESTS IN FRANCE. [Handwritten] x8940 x8770 93-NK car will be leaving Derby tomorrow on its way to France. This car has the following modified pieces compared with 98-NK car which has just returned from France. 1. New pistons. These are sand-cast pistons with the stiffer diagonal web on the split side, 5 narrow rings with grooves below each ring. 2. Gudgeon pins. The pistons are heated up before the gudgeon pins are fitted. This enables the pin to be .0015" to .002" oversize. 3. Engine bearer arm. This is made of N.S., heat treated, no brazing. 4. Latest undershields - engine and gearbox. 5. Radiator with modified water inlet. 6. Radiator shutters. The shutters have been shortened so as to give more clearance at the bottom and so that they will not be jammed with mud and dirt. The bottom bearing for the shutters has been inverted to avoid water and mud draining into them. The controls on the radiator shutters have been modified. 7. Steering. The levers inside the box are now bolted together. The bracket holding the steering to the frame is solid without clamping bolts. 8. Exhaust choke valve. This has been modified to prevent the spindle distorting to overcome rattles. contd :- | ||