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).
Modifications to the front anchorage of the rear springs for the Japan 3 model.
| Identifier | ExFiles\Box 106\1\ scan0228 | |
| Date | 14th February 1931 | |
| R.{Sir Henry Royce} FROM DA.{Bernard Day - Chassis Design} SECRET. X 540 DA{Bernard Day - Chassis Design}1/M14.2.31. C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} C. to HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} HY.{Tom Haldenby - Plant Engineer} JAPAN 3. FRONT ANCHORAGE OF REAR SPRINGS. With reference to R2/M3.2.31., we send herewith print of N. sch. 3223. shewing the following modifications: The centre rib of the anchorage bracket is made broad and afterwards milled out from the back. The cross member flange is shortened and forged in pairs. The cross member is dropped and the tubular part of the anchorage bracket is raised. The brake cables now wrap round the cross member on full bump a small amount. The simplified connection for conveying oil on to the rear axle referred to in R2/M3.2.31. It is now suggested that with this method of conveying oil on to the rear axle it is not necessary to go through the spring bracket and down the outside, but the pipe could go direct to the shackle pin head. It is suggested that if, due to the shackle pin bearing clearance, which is considerably more than the largest drip plug and may increase with wear, oil is drawn into the main pipe line, a non-return valve could be used where the pipe joins the shackle pin similar to that used on all the Bijur plugs, which closes when the pressure from the pump ceases. This proposal is shewn on N. sch. 3224. A filter is usually added but we have omitted this for simplicity. It is also suggested that the pipe along the spring should be secured into the spring eye by a small union with an 'acorn' sleeve similar to the latest Bijur connections, which have the virtue of gripping the pipe without soldering, and would enable it to be added at the last minute, and so prevent damage to the pipe during handling of the spring. The original of N. schs. 3223/4 are attached to BY's copy of this memo. DA.{Bernard Day - Chassis Design} | ||