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).
Flexibility test on pedestal pistons compared to standard pistons.
| Identifier | WestWitteringFiles\P\October1926-November1926\ Scan048 | |
| Date | 12th October 1926 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/ACL. c. to BJ. Wor.{Arthur Wormald - General Works Manager}✓ c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer}✓ c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer}✓ ORIGINAL PEDESTAL PISTONS. X8040 X7040 We have several sets of pedestal pistons in use on test engines and cars and have found them to give satisfactory service. It will be remembered that the last 10,000 miles test car in France was fitted with 'Pedestals' and their operation at the end of that time was more silent than was usually the case with the present standard after the same time. In order to determine the relative flexibility of these pistons and the standard, we made the following simple test. The piston was supported on its side on a plate with the split part of the skirt (non pressure side) uppermost. A 'V' shaped bar parallel to the axis of the piston was placed along the uppermost part near the split and to it were attached weights. The deflection was measured by means of clock indicators. The following sketch shews the apparatus used :- A standard load of 30 lbs. was used in each case. The following are the results :- contd :- | ||