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 test report on undershield designs for gearboxes, specifically for the Indian market.
| Identifier | WestWitteringFiles\Q\December1926-January1927\ 109 | |
| Date | 24th January 1927 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/AJL. c. to BJ. WOR.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/AJL/T24.1.27. INDIA UNDERSHIELDS. X5290 Comparative tests have been carried out between the gear box undersheet to LeC.2253 (at present fitted to 9-GIII) and the standard system of undersheeting. In LeC.2253 the gear box undersheet has been modified with the following two objects :- (1) To give the maximum amount of ground clearance. (2) To prevent as much mud as possible hitting the front of the guard and being blown up through the engine side tray slots. The new undersheet is a very great improvement over its predecessor; a certain amount of mud still finds its way through the slots, but the amount is comparatively small. The majority enters through the rear slots on the off side. The last four slots on this side (steering column side) could be deleted to considerable advantage and replaced by a one-piece of undersheeting. We cannot imagine that by making this slight alteration we shall, to any noticeable extent, increase the heat to the front passengers. The fact that mud is blown up through these slots indicates that there is no appreciable air flow from under the bonnet outwards at this point. The near side of the car is kept clean in this position by the starter motor pocket. The proposed alteration to the off-side engine guard does not extend so far forward as the starter motor pocket on the near side. HS{Lord Ernest Hives - Chair}/A.J.L./deov | ||