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).
Summary of performance tests at Brooklands for a 6-Goshawk-11 car, covering car conditions, speed work, and hill climbs.
| Identifier | ExFiles\Box 77\4\ scan0338 | |
| Date | 22th August 1923 | |
| X4240 22/23rd. Aug. 1923. SUMMARY - BROOKLANDS. 6-Goshawk-11. X788 X4240 Car conditions. Open touring - two passengers. Rear tyres 50 lbs/sq.in. Front " 40 " Double wind-screen - hood. Wt. with passengers - 1.588 tons. Speed work. 54 m.p.h. lap - Lodge plugs - pre-ignition. 58.6 m.p.h. average lap - K.L.G. Sparking Plugs. 61 m.p.h. fastest lap - Magneto ignition. 60 m.p.h. fastest lap - Battery ignition. (speedometer reads 1.3 m.p.h. slow at 58 m.p.h.) 67 m.p.h. fastest speed - by speedometer. Fan on or off appears to have little or no effect on max. speed. Petrol consumption at max. speed 15 m.p.g. Hill climb - a) Standing start bottom of test hill in 1st. speed, 20 m.p.h. at top - speed falls off 1 m.p.h. on the 1 in 4 portion. b) 25 m.p.h. at bottom second speed. 20 m.p.h. at the top. c) Standing starts. 1 in 8 - easily. 1 in 5 - just. 1 in 4 - failed. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||