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 manufacture a set of pistons with specific modifications for the RE 250 HP experimental engine.
| Identifier | ExFiles\Box 33\2\ Scan021 | |
| Date | 23th November 1915 | |
| To Mr. Mills for Works. 169492 23rd November, 1915. By3/G231115. RE 250 HP. EXPERIMENTAL ENGINE. X Exp. No. 1915. Will you kindly instruct the works to make one complete set of 1/2 pistons for Mr. Hives, to be used for general testing purposes. They should be instructed as follows:- Finished generally to Piston drawing E.7772, the only point which they should differ from this drawing being that .125" must be left on the crown so as to increase the compression by that amount in the cylinders. This means that the finished piston should be .125 more from the gudgeon pin centre to the top of the piston. You will note that this will necessitate Mr. Cheetham leaving extra machining on this set of pistons. By.{R.W. Bailey - Chief Engineer} Recd 24/11/15 O.C.T. (Dup) 117 Gr.{George Ratcliffe} 5M. 10,000/2/15 (j) 193W | ||