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).
Power curves for a big bore engine and the effects of removing turbulent lips to improve performance.
| Identifier | ExFiles\Box 146\3\ scan0020 | |
| Date | 25th June 1936 | |
| X1245 W/P - Sr. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}18/KW.25.6.36. Sr/Dn.24/22.6.36. Herewith power curves of the big bore engine. (2) is the present standard curve and (1) is what we get by taking off the turbulent lips which we find are not necessary. We expect to be standardising (1) in about three months' time. The shape of curve (2) rather indicates why you find it so hard to get 4500 revs. If you put the losses in the exhaust system on top of this curve you will find you are probably 30 H.P. over the peak of the power curve at 4500 r.p.m. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||