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).
Safest testing procedure for the Continental Phantom II, comparing engine bench tests with road tests.
Identifier | ExFiles\Box 19\1\ Scan163 | |
Date | 31th December 1931 | |
K7120. To See From E.{Mr Elliott - Chief Engineer} <s>To see By: Hs.{Lord Ernest Hives - Chair} PHs</s> E.1/MJ.31.12.31. Re. Continental Phantom. Referring to your memo Sg.{Arthur F. Sidgreaves - MD}4/E30.12.31., we have now put in hand the design work in connection with the S.U. carburetter. Regarding the question of an engine bench test, the original suggestion was founded on a belief that the average speed would not be very much higher on a 10,000 miles test. Hs.{Lord Ernest Hives - Chair} However says that this is not so and with the roads available at Chateauroux there will be a considerable increase in average speed, in which case the engine should be adequately tested. It further appears that we have no established values for car engine bench tests. In some ways they are more severe, for example, we have already broken Phantom II crankcases on the bench and yet have had no trouble on the chassis. In other ways the road test is worse as is shown by exhaust valve failures not experienced on the bench. It was therefore decided that the safest procedure for Type Testing the Phantom II under the increased output is to adhere to the 10,000 miles road test but at a suitably increased average speed. E.{Mr Elliott - Chief Engineer} [Stamp] RECEIVED 1 JAN 1932 S.H. EVERSHEDS DEPT | ||