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 aluminium pistons seizing during dynamometer tests due to reduced clearance.
| Identifier | ExFiles\Box 35\2\ scan 135 | |
| Date | 25th September 1919 | |
| EH. from EP.{G. Eric Platford - Chief Quality Engineer} C. to En. x 2748 Chassis. EP{G. Eric Platford - Chief Quality Engineer}7/F25.9.19. Re. Fitting of Aluminium Pistons. With the present reduced clearance I find that we are having trouble of pistons seizing up during their dynamometer test, and on examination of the pistons it appears that there is a tendency for the seizing to commence at the gudgeon pin end. It was our pre-war practice to ease more off the sides of the pistons than is the practice with the aluminium pistons, and as we have now to be prepared to carry out our pre-war practice as regards the curing of piston knocks, etc., I am anxious that we should arrange for the pistons to be eased more at the sides than is the present standard practice. I am trying one or two sets on cars on test, and should be glad if you will keep in touch with this job, as I am anxious that you should recommend such as standard for production, and so avoid our having to do this when the cars come on test. EP.{G. Eric Platford - Chief Quality Engineer} [Signature] [Inverted text at bottom] N R 338/1(200 T) 8.S.(P.) 623 22-8-19. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2316 | ||