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 the Peregrine II, No. 4 unit, detailing changes to crankshaft, pistons, and cylinder head components.
| Identifier | ExFiles\Box 169\4\ img156 | |
| Date | 27th January 1933 | |
| To Hs.{Lord Ernest Hives - Chair} from RHC{R. H. Coverley - Production Engineer}/WSC.{W. S. Cassel} RHC{R. H. Coverley - Production Engineer}/WSC{W. S. Cassel}4/LS.27.1.33. PEREGRINE II. No. 4 UNIT. Specification of the above Unit issued in RHC{R. H. Coverley - Production Engineer}/WSC{W. S. Cassel}4/LS.25.11.32. is revised as follows:- PASSED TO TEST 14.1.33. Previous Specification. Crankshaft LOP.E.100740. E.100529 Crankshaft-V.C.M. 4.000 stroke. E.100719/20 Balance Weights, Removed. Pistons LOP.E.100158. E.100544 Piston to suit 4.000 stroke Crankshaft removed. Cylinder Head LOP.E.100861. 6-E.100081 Exhaust Valve Guides I/C. - removed. Revised Specification. Crankshaft LOP.E.100740. The following New parts fitted- 1-E.100841 Crankshaft-V.C.M. 4.125 stroke. E.100884 Balance Weights-small. E.100720 " " -large. E.100059 Crankshaft Flange to suit G.100500 Flywheel. Pistons LOP.E.100158. Complete to the above LOP. E.100525 Piston to suit 4.125 stroke Crankshaft. E.100037/8 Piston Rings. Cylinder Head LOP.E.100861. LeC.3306. The following parts fitted, incorporating:- LeC.3306 - Strengthened Exhaust Valves. Existing Cylinder Head E.100578 modified to E.100931. 6-E.100926 Exhaust Valve Guides I/C. -continued- | ||