Specifications and results for a B-4 Unit 10-hour high-power endurance test.
| Identifier | ExFiles\Box 90a\3\ Scan098 | |
| Date | 1st July 1935 | |
| FOR FILES. 9 July, 1935. B-4 UNIT - 10 HOURS ENDURANCE (HIGH POWER). Cylinder Head: Comp. Ratio 8.35 to 1 Ex.17749. Inlet valve Ex.17456 (1.550). Exhaust " Ex.15604 (1.300). Standard valve springs. Induction System: 1 5/8" S.U. carbs on 1 5/8" pipe. Pistons: As standard production - "Aerolite", marked G-4. Cyl. Block: Standard production + .002 oversize bores. Camshaft: Standard production (EB-1085). Bearings: Main - white metal as standard, but grooved Nos. 2, 3, 5 & 6 (Ex.19004/5). Big Ends: RR. lead bronze. Petrol: 50% Shell No.1. 50% Benzol. Oil: Castrol XXL. Plugs: K.L.G. 827. Gasket: 3-piece sandwich, nickel gasket. Petrol Cons: at 4000 r.p.m. = .51 pts/BHP/Hr. Oil Cons: 2 pts/hr. (for the 10 hours). Power Output: 135 BHP. developed, using test bed exhaust system. Hs {Lord Ernest Hives - Chair} /C.T.Salt. | ||
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).