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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-
  
  


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