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).
Cooling system tests for the Goshawk engine when operated with a reduced amount of water.
| Identifier | ExFiles\Box 24\4\ Scan060 | |
| Date | 19th June 1922 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} X766 Hs{Lord Ernest Hives - Chair}5/LG19.6.22. GOSHAWK COOLING. X.766 X.4240. We have carried out tests on a Goshawk engine to see the effect if the engine is started up short of water. We ran with a glass tube between the engine and radiator so that we could watch the flow of water. We found that with 2 gallons less than the standard amount there was no circulation at the speeds below 1000 R.P.M. After that, the circulation increased with the increase in speed. It was noticeable however that as soon as the water boiled, there was a rapid circulation of steam and water and even at the very lowest speed, this circulation was maintained. The circulation of steam and water cooled the engine sufficiently so that there was no drop in power when running full throttle and we could run on until there was less than one gallon of water in the system before the power fell off. We have since carried out a further test on he road with another Goshawk car. We ran it with the water boiling continuously for 43 miles; at the finish there was only ½ a gallon of water left. The oil and paint was frizzled but the head is not damaged. Hs.{Lord Ernest Hives - Chair} | ||