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).
Preventing engine coolant from boiling by pressurizing the cooling system.
| Identifier | ExFiles\Box 24\4\ Scan101 | |
| Date | 14th September 1923 | |
| X766 EXPERIMENTAL REPORT. COPIES TO: R.CJ. Mr. WOR.{Arthur Wormald - General Works Manager} By.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} EP.{G. Eric Platford - Chief Quality Engineer} Mr. OY. Rs.{Sir Henry Royce's Secretary} Expl. No. X.766 REF. He1/LG14.9.23. OBJECT OF TEST. To provide means to prevent water boiling so readily. TESTER. A.C.Lovesey. G.W.Hancock. CONDITIONS. Tests carried out on 40/50 HP. Test Bench. Tests carried out on the road on 40/50 HP. car. SUMMARY OF TEST. At Rg{Mr Rowledge}'s suggestions we have carried out tests with running the cooling system under pressure. We believe this scheme is being used in U.S.A. for water-cooled aero engines. We have considered using 6 lbs. pressure which would put up the boiling point from 100°C to 110°C. With 6 lbs. pressure there is no noticeable bulging of the flat surfaces on the radiator - at 10 lbs. pressure there is. The disadvantages we have noted with this scheme are :- (1) On the 40/50 HP. there is an increased tendency for detonation. We do not consider this very serious because we advise running on a lower gear with engine throttled. (2) All rubber connections and joints must be tight to prevent leakage. contd:- | ||