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).
Request to calculate the cooling surface of radiators being tested, comparing Orme Evans and Marstons tubes.
Identifier | ExFiles\Box 78\3\ scan0064 | |
Date | 5th March 1915 | |
R.R. 235A (150 H) (S.A. 209. 25-1-15) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0900. COPY. To E, from R.{Sir Henry Royce} Copy to J.{Mr Johnson W.M.} " " Na.{Mr Nadin} " " Wor.{Arthur Wormald - General Works Manager} fbr EH. 8/3/15 COPY. R5/IB5315. XC496 March 5th, 1915. Will you please work out the cooling surface of the radiators which Mr. Hives is testing, that is, take the inside area of each tube multiplied by its length, and that will give us a certain area in square inches per horse power. I believe it is somewhere in the neighbourhood of between 100 and 200. We are interested in the ones 4" and 5" thick, of [] tubes Orme Evans, and O tubes Marstons. The latter is my favourite, if it is proved to be mechanically strong enough. I want to know how much water these radiators will cool from 80 C. to 40 C. per minute, when subject to a current of air of 50 miles per minute, thus, and other speeds from 30 to 80 miles per hour. R.{Sir Henry Royce} OD [Diagram showing airflow from a fan through a tapering tube into a radiator] Propeller or other fans. <-- 12" space. --> Radiator tube larger than radiator. | ||