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).
Need to increase initial radiator movement on P.2 and N.2 series cars.
| Identifier | ExFiles\Box 16\2\ Scan064 | |
| Date | 21th March 1932 | |
| 87250. To By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} C. to MX.{John H Maddocks - Chief Proving Officer} E.{Mr Elliott - Chief Engineer} C. to Wor.{Arthur Wormald - General Works Manager} Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie}/KT. 21.3.32. 1457. INCREASED INITIAL RADIATOR MOVEMENT ON P.2. N.2 SERIES ONWARDS. We find that the required initial movement of the radiator on its centre mounting in this country is not sufficient to conceal frame jellying on bad pave' French roads. We have recently tested two cars having the present amount of initial radiator movement on bad pave' French roads and the radiator movement and bonnet knocks have been far too excessive. In some cases the radiator movement is limited by the radiator control rubbers each side of the centre mounting. We have obtained some new rubbers which are .075" shorter. This means that the radiator will have this amount of movement before the rubbers come into action. As there is only a small percentage of cars that require large radiator movement, we do not think it is advisable to give all radiators the large amount of movement. We do, however, want sufficient clearance between the radiator and the crossmember so that the large clearance can be given to a car with a complaint of radiator movement, by only changing the radiator rubbers. We are still too close with the clearances between the radiator and the crossmember. The erecting bay still have to remove material from the crossmember in order to get the present amount of initial radiator movement. The erecting bay are now working to a minimum clearance of .375" in each direction, measured at a point 2.750" below the top of the shutters. In view of our recent experience in France, where 80.JS{Mr Johnson's Secretary}, a trials car, was useless to the Paris Depot for fast drivers until more initial movement had been given to the radiator, the minimum movement of .375" must be increased to .500" in each direction. These measurements should be taken on a complete chassis less the radiator control rubbers and the bonnet. This is to ensure clearance for the bottom water connections etc. We had hoped that with the future radiator crossmember which is .325" further forward in the frame, there would be ample clearance for the radiator. However it appears that the forward crossmember is going | ||