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).
Engine tests, figures obtained, and subsequent failures on a boat.
| Identifier | ExFiles\Box 174\4\ img006 | |
| Date | 27th February 1931 | |
| HS{Lord Ernest Hives - Chair}/Ormel/ATS. 5.31. contd. -4- Having now got a complete set of boxes, an effort was made to have the boat ready for Friday morning, by continuing through night everything was ready by Friday mid-day. FRIDAY 27.2.31. Previous to towing up to Parana we had agreed and arranged with Garner to use the priming pump to the exhaust system as much as possible during the preliminary running before getting up on the step. Engine started up, running O.K. Figures obtained :- New set K.L.G. 618 plugs. No.1 prop. 0 5 8 10 Mins. run R.P.M. 800 800/1600 1800 2000 Oil pressure 75 75 80 80 lbs/sq." Water In. C - 35 35 35 Water Out. C - 60 60 60 Petrol pressure - 1.5 1.5 1.5 lbs/sq." Scoop - 1.0 1.0 1.0 Oil Out. C .. - - - Boost - NIL - 65 Duration of run ..... 12 minutes. Aluminium exhaust manifolds again failed, boat not up on step. The boat was immediately towed back to Tigre. It was now obvious that something drastic would have to be done. The possibilities of towing Miss England II at fairly high speeds was suggested, for a check test on the exhaust cooling system, but Mr. Cooper would not allow this to be done. Mr. Cooper agreed that it was essential to fit a separate scoop to the exhaust system to overcome the climatical conditions here, they being much hotter than we had on any previous experiences. On all the trials the discharge from the exhaust cooling was always observed to be steaming before the boat was up on the step. | ||