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).
Standardisation report for longer skirt pistons to safeguard against piston knocks.
| Identifier | ExFiles\Box 171\1\ img247 | |
| Date | 17th April 1931 | |
| RR 78B (10M) (B459. 24-10-30) 6/3185. COMPLETED 6.5.31. STANDARDISATION of CHASSIS PARTS. Date 17.4.31. X No. 7040. Drawing No. E.8204. Part List Description of Parts. LONGER SKIRT PISTON. Origin. To safeguard against development of piston knocks. Experimental Test Report. The longer skirt pistons have been helpful in overcoming piston knocks. These have been a standard production on Springfield Cars for a number of years. Road Test Report. we have tried five sets of these pistons on the dynamometer and considerable mileage on the road. The results have been very satisfactory. [Stamp: ACTION, For R.H. and L.H. cars.] A Scrap and replace at all costs, including Chassis already delivered to Customers. B Scrap and replace on Chassis in Works. [Ticked] C Scrap present stock and replace on all Chassis not yet handed to test. [Ticked] D Use existing stock Alteration effective on future Chassis. [Ticked] Weight of Old Part. Weight of New Part. Difference per Car. Cost of Old Part. £ 2.4.2. Cost of New Part. £ 2.6.2. Difference per Car. £ 0.2.0. Increase. Signature from Cost Dept. that above is correct. G/Rb.{R. Bowen} 2.5.31. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 4.5.31. Cost of Parts in Works which will be scrapped if commenced on:- Series............£......... Series............£......... Series............£......... INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 5.5.31. | Agreed SG.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | 22/4/31 | Agreed R.HR. There has been many modifications to keep WOR.{Arthur Wormald - General Works Manager} | 21.4.31. | Agreed Wor.{Arthur Wormald - General Works Manager} Adler, such as reducing the pin nearer C. | 21.4.31. | Agreed. C. it is. We still want and the lower part of the pistons are RG.{Mr Rowledge} | 21.4.31. | Agreed Rg.{Mr Rowledge} We must look for the, In the face of bronze pistons DA.{Bernard Day - Chassis Design} | 22.4.31. | Agreed Da.{Bernard Day - Chassis Design} since the cause, we must be very careful about increased BY.{R.W. Bailey - Chief Engineer} | 21.4.31. | Agreed By.{R.W. Bailey - Chief Engineer} no weight of pistons EP.{G. Eric Platford - Chief Quality Engineer} | 22.4.31. | Agreed. Very good on test. Should use on U.S.A. chassis immediately. EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 22.4.31. | Agreed AE. PN.{Mr Northey} | 21.4.31. | Agreed PN.{Mr Northey} HS.{Lord Ernest Hives - Chair} | | Agreed Hs.{Lord Ernest Hives - Chair} | ||