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).
Wind tunnel equipment, oil cooler development, and radiator matrix efficiency improvements.
| Identifier | ExFiles\Box 173\1\ img219 | |
| Date | 6th February 1934 | |
| -2- They have decided that they cannot do wind tunnel work with anything but D.C. and have therefore installed a 64 H.P. D.C. generator. The dynamometer set-up has a 120 H.P. motor. They spent £50,000 on the development of the Viscon oil cooler alone. Naturally such a scale of research work is only made possible by the volume of production. They are making over 4,000 Chevrolet radiators a day. On this production saving a cent per radiator represents 10,000 dollars a year. RADIATOR CORES The radiator matrices that Serckstons are now producing for us to-day are 20% less efficient than the existing standard Harrison core. The core is of the same type, but the efficiency has been stepped up in two ways: (1) Instead of dents in the indirect cooling strips they use cut louvres. These are more effective in dissipating the stagnant layer of air than the dents, increasing the efficiency 10%. We should be able to get Serckstons to modify their tools to produce this alteration. (2) They have increased the density of the matrix from 4 indirect fins/1" to 16 fins/1", i.e. 4 This improves matters a further 10%. | ||