P.2 Cooling Tests, specifically regarding air pressure under the bonnet.
| Identifier | Morton\M19\ img244 | |
| Date | 19th September 1931 | |
| ORIGINAL To R. {Sir Henry Royce} From Hs {Lord Ernest Hives - Chair} /Lid. {A. J. Lidsey} c. to Sg. {Arthur F. Sidgreaves - MD} Wor. {Arthur Wormald - General Works Manager} c. to E. {Mr Elliott - Chief Engineer} Da. {Bernard Day - Chassis Design} c. to By. {R.W. Bailey - Chief Engineer} Ha/Lid. {A. J. Lidsey} 1/WJ.19.9.31. X766 X7250 X7260 P.2 COOLING TESTS. Further to Hs {Lord Ernest Hives - Chair} /Lid. {A. J. Lidsey} 1/AD.17.9.31, we have recorded the air pressure existing under the bonnet fitted with flip-flap shutters. The results obtained show a decrease in pressure of approximately 25 % resulting from opening the shutters, this compares with 40% obtained by using a louvred bonnet. The differences in pressure are approximately proportionate to the difference in engine water temperature when running under these conditions. Hs {Lord Ernest Hives - Chair} /A.J.Lidsey. Print attached. | ||
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).