Specification revision for Kestrel FS 6 Cylinder Unit No.1, detailing changes to pistons and valves.
| Identifier | ExFiles\Box 54\4\ Scan119 | |
| Date | 4th November 1933 | |
| To Hs. {Lord Ernest Hives - Chair} from RHC {R. H. Coverley - Production Engineer} /WSC. {W. S. Cassel} C. Mr. Jaques. (A.I.D) 84659 RHC {R. H. Coverley - Production Engineer} /WSC. {W. S. Cassel} 1/AP.4.11.33. KESTREL(Aero Engine) FS. {F. Steele} 6 CYLINDER UNIT No.1. Specification of the above Unit is revised as follows:- PASSED TO TEST 1.11.33. Previous Specification. Pistons (7-1 Ratio) RR.59. 6-E.37724 Pistons. 6-E.29208 Piston rings -top. 12-E.29207 Piston rings - Inter. 6-E.30648/1 Piston rings- Scraper. 6-E.31595 Gudgeon Pins. Removed. Valves & Fittings. Complete as shewn in spec. RHC {R. H. Coverley - Production Engineer} /WSC. {W. S. Cassel} 3/LS26.1.33. Removed. Revised Specification. Pistons (6-1 Ratio) H.D.Y. The following replacement parts fitted ex. Kes.6 Cyl. No.2. Unit:- 6-E.40837 Pistons - ground to Drg.V.1372 - no oil holes in Gudgeon pin bores. E.40985-6 Bichromium Iron Piston rings - Top & Inter respectively, fitted to Nos. 2.4 & 6 Pistons. E.29208-7 Wellworthy Piston rings 7 Top & Inter Respectively - fitted to Nos.1.3 & 5 Pistons. 6-E.30648/1 Scraper Rings. 6-E.31595 Gud.Pins -S/ZNCR. Valves & Fittings.LOP.E.40218. Complete to the above LOP. fitted ex.Kes.6 Cyl.No.2. including:- 12-Ex.12548 Salt Cooled Exh. Valves-tulip head type - produced in KE.965. - Unstellited -450. 12-E.28651/1 Inlet Valves - S/SLV. continued | ||
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).