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).
Issues with Peregrine piston stiffness, comparing it to other models, and proposing a more flexible design.
| Identifier | ExFiles\Box 2\1\ B002_136 137-page03 | |
| Date | 2nd August 1932 | |
| To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} *136- STIFFNESS OF PISTONS When we were in trouble with the Peregrine piston tightening up, we started to some tests to ascertain if the Peregrine piston was very much more rigid than the 25 HP. or the 40/50, and the attached print shows the results obtained. Since this time we have increased the clearance of the Peregrine piston slightly and have not had very much more trouble. The results seem to show, however, that the Peregrine is definitely somewhat stiffer than the other pistons relatively, particularly at the top of the skirt where the gudgeon pin exerts the major influence on it, and we think it is well worth trying out something rather more flexible. We should be glad to have particulars of anything you propose to instruct. Print Hs.{Lord Ernest Hives - Chair}686 attached. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||