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).
Letter discussing National Advisory Committee reports on superchargers, accelerometers, and the effects of G-force on pilots.
| Identifier | ExFiles\Box 43\2\ Scan109 | |
| Date | 15th April 1926 | |
| ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X3900 Oy3-E-41526 April 15, 1926 Mr. E.{Mr Elliott - Chief Engineer} W. Hives, Rolls-Royce, Ltd., Derby, England. Re Reports of National Advisory Committee Dear Mr. Hives: You now have the Air Service Reports 523, 525, and 528 on engine tests. Report 230. I enclose a single copy of N.A.C.A. report No.230 on Roots Super-charger which they have just sent us apparently on their own initiative. Although the report is preliminary I think you will find it interesting. The final conclusion underlined in red is so very favorable as to amount to enthusiasm, in a report of this nature. Report 100. Accelerometer design. No.100 is old but describes the Norton accelerometer of which I sent you the sample blueprint chart. This was originally applied to aeroplanes to measure the accelerations in order to compute the stresses in the structure due to manoeuvring. Prof. Warner told me on Monday that they had measured accelerations in flattening a plane, as high as 6g. which of course would take up pretty nearly all the factor of safety in the machine. The psychological effect on the pilot of a huge downward acceleration of 6g. for a short time was not unbearable. Half this or 3g. for a longer time as in turning corners on a racing plane, produced blank unconsciousness. While prolonged and repeated accelerations of even as low as g/6 on a | ||