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).
Comparison test report for S.U. carburettor needles, type RR.X versus RR.A.
Identifier | ExFiles\Box 31\5\ Scan086 | |
Date | 27th July 1933 | |
X 1-181. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from F.Dodd. Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}10/KT.27.7.33. COMPARISON TESTS WITH S.U. CARB. NEEDLES - 4.B.IV. Acceleration Tests. AVERAGE BOTH WAYS. NEEDLES. TYPE. RR.X. RR.A. 10 - 30 mph. 7.6 sec. 8.1 sec. 10 - 40 mph. 11.9 sec. 12.7 sec. 10 - 50 mph. 16.0 sec. 17.2 sec. 10 - 60 mph. 20.9 sec. 22.2 sec. -------- Performance Test. Ticknall Hill. RR.X. RR.A. 56.2 sec. 73.6 mph. 58.5 sec. 72 m.p.h. --------- Consumption Test. with measured gallon :- RR.A. Average Speed 48.32 mph. 15.1 M.P.G. RR.X. " " 54 mph. 18.1 M.P.G. --------- RR.A. type needles are present production and we would recommend changing over to RR.X. as soon as possible. Hs{Lord Ernest Hives - Chair}/F.Dodd. | ||