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).
Specification revision for a Kestrel FS 6 Cylinder No.2 Unit, detailing changes to crankcase bearings and piston rings.
| Identifier | ExFiles\Box 54\4\ Scan155 | |
| Date | 11th August 1933 | |
| To Hs. {Lord Ernest Hives - Chair} from RHC {R. H. Coverley - Production Engineer} /WSC. {W. S. Cassel} c. Hs {Lord Ernest Hives - Chair} /Ryc. RHC {R. H. Coverley - Production Engineer} /WSC. {W. S. Cassel} 2/AP.11.8.33. Kestrel FS. {F. Steele} 6 Cylinder No.2. Unit. Specification of the above Unit is revised as follows:- Passed to Test 4.8.33. Previous Specification. Revised Specification. Crankcase & Brgs.LOP.E.36040. Crankcase & Brgs.LOP.E.36040. 1-Each E.40165/6 Main Brg. The following new parts fitted:- No.4. RR.Lead Bronze. Removed. 1-Ex.11956 Main Brg.-RR. Lead Bronze. 1-Ex.11958 Dowel. Pistons LOP.E.36091.H.D.Y. Pistons LOP.E.36091.H.D.Y. (6.1 Ratio) (6.1 Ratio) 6-E.29208 Piston rings-Top. The following new parts fitted:- 12-E.29207 Piston rings-Inter. 6-E.34929 Scraper rings. 3-E.40984 Piston rings - Bricromium Iron-Top. 6-E.40985 Piston rings - Bricromium Iron-Inter. Removed. The above rings fitted to Nos.2.4.& 6 Cylinders. 3-E.29208 Piston rings - Wellworthy - top. 6-E.29207 Piston rings - Wellworthy - Inter. Above rings fitted to Nos. 1.3 & 5 cylinders. 6-E.30648/1 Scraper rings. continued. | ||