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).
Engine unit specification sheet detailing main components and performance data.
| Identifier | ExFiles\Box 90a\1\ Scan032 | |
| Date | 1st July 1934 | |
| B.11. Unit. Spec: RHC{R. H. Coverley - Production Engineer}/WSQ.4/EP.{G. Eric Platford - Chief Quality Engineer} 33-7-34. Main details. Cyl. head. Comp. Ratio. 7.75:1. EB 1237. % Inlet valve. Ex 12089 (1.500 dia). Exhaust " EB 1325 (1.200 dia). (Std. valve spring). Pistons. "Rendite" (racing)? .005" Clearance. Cyl. block. Std. production Camshaft. " EB. 1085 (113°) I.O 3.6 BT.{Capt. J. S. Burt - Engineer} E.o. 50 BB I.C 51 AT. E.C 5.5 AT. Bearings. Main. White metal: as standard. Big ends. R.R. 7/B. (without grooves). Petrol. 50% Shell hol.? 50% Benzol. Oil. Castrol. Aero 'C' heavy. Plugs. K.L.G. 827 Gasket. 3 piece sandwich: nickel gasket. Petrol Cons. @ { 4000. R.P.M. F.T. = 65 pts/hr. = .55 pts/BHP/hr GHP/112 { 4250 " " = 68 " = .59 " { 4500 " " = 69 " = .62 " Oil. Cons = .75 pts/hr. running at max revs. F.T. | ||