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).
Carburettor performance and miscellaneous vehicle faults.
Identifier | ExFiles\Box 135\2\ scan0189 | |
Date | 17th September 1943 guessed | |
- 5 - Carburetters cont'd- To obtain a satisfactory petrol consumption we have found it necessary to remove the Standard B.V. Needle (C.3) and Jet with a .090" orifice, and replace them with a L.B.1 Needle and open out the standard Jet to .100" orifice. This change of Needles and Jets gave us an improved consumption of 2½ to 3 m.p.g. 3.B.50 has a remarkable petrol consumption of 19 m.p.g. but for some unknown reason and lack of time for investigation no other B.60 engine attains this figure, this is a case for investigation after the war. With regard to the Stromberg Carburetters fitted to B.80 Engines in 4.B.50 and 30.G.VII, they have been run with the Automatic Starting Device as developed and fitted by Wym.{G. Harold Whyman - Experimental Manager} Whilst these have been satisfactory having run 28,000 miles on 4.B.50 and 80,000 miles of 30.G.VII the scheme requires designing properly. M I S C E L L A N E O U S. The following are a few items which have been a constant source of trouble, and can be very annoying to a customer. (1) Rev counter and speedometer drives become noisy, and the needles fluctuate up and down the dial. (2) Wind toned horns are very temperamental in damp weather and refuse to blow just when you want them. Even when working correctly they may be satisfactory for town work, but are highly dangerous at high speeds on the open road. (3) Trafficators sticking. (4) Unreliable clocks. Wym{G. Harold Whyman - Experimental Manager} | ||