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).
List comparing induction pipe depressions for the E.A.C. and 40/50 HP engines at various speeds.
| Identifier | ExFiles\Box 75\2\ scan0301 | |
| Date | 5th May 1925 | |
| X2758 To BY/C. from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG26. 5. 25. (Handwritten: X8010 (crossed out), X2758) Herewith is a list of the induction pipe depressions of the EAC. and 40/50 HP. taken under full throttle conditions at each speed. It will be observed that at the higher speeds the difference between these two engines is rather marked. RELATIVE INDUCTION PIPE DEPRESSIONS. E.A.C. AND 40/50. ------------------------------------------------ | | Induction pipe depression | | | ins. H20. | | R.P.M. |------------------------------| | | E.A.C. | 40/50. | |----------|------------|-----------------| | 650 | 13.55" | 14.25" | | 750 | 15.25" | 16.6" | | 1000 | 19.00" | 21.9" | | 1250 | 21.40" | 29.6" | | 1500 | 26.40" | 37.3" | | 1750 | 31.90" | 46.1" | | 2000 | 38.4" | 60.0" | ------------------------------------------------ Full throttle - depression measured ins. of water. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||