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).
Regained horsepower on an engine and the effect of air intakes.
| Identifier | ExFiles\Box 36\2\ scan 104 | |
| Date | 15th March 1927 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} X2934 F.10-12. X3804 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG15.3.27. We have regained some of our lost H.P. on the above engine. At the moment we have no satisfactory explanation for the increase obtained with this engine. It will be observed that the horizontal and vertical air intakes cause a 2 1/2% drop in H.P. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||