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).
Proposed water pump modifications for the 20/25 engine to address a boiling issue.
Identifier | ExFiles\Box 131\1\ scan0036 | |
Date | 11th January 1932 | |
BY.{R.W. Bailey - Chief Engineer} FROM E.{Mr Elliott - Chief Engineer} C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} HS.{Lord Ernest Hives - Chair} X766. EL/M11.1.32. X.5770 X.766 20/25 ENGINE - re. BOILING AT 200 RPM. We do not know what difference in head was eventually measured by HNK. at 200 RPM. of the engine, but had concluded that 10% on the rotor dia would not be sufficient. It must be remembered however that the head is proportional to the square of the velocity and therefore perhaps 20% on the dia will be enough. The other features we wish to introduce is a big reduction in the cross sectional area of the volute to choke off the circulation at high speeds. We think it will be necessary to reduce the cross sectional area to one half. These improvements could be standardised at the same time as the water pump end cover and bend in one piece, and the pump body could be aluminium, using the same gland parts as P. 2., J.{Mr Johnson W.M.} 3., and Peregrine. E.{Mr Elliott - Chief Engineer} | ||