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).
Responding to a complaint about a 'want of acceleration', defending the carburettor's low-speed performance over high-speed power.
| Identifier | ExFiles\Box 113\2\ scan0126 | |
| Date | 16th September 1927 | |
| Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to BJ. Mr. Fuller. Mr. Olley. Mr. Nadin. X/1725 R1/M16.9.27. SPRINGFIELD COMPLAINT X.1725 OF WANT OF ACCELERATION. X.3614 X.8080 I disagree with this, but we know that our carb. is somewhat defective in want of power at high speeds, but for any conditions at low speeds (if correctly made and set) it excels over all others, and it is for this that we make the sacrifice at high speeds. I demonstrated this to Mr. Nadin. Our acceleration tests shew excellent torque from 15 m.p.h., also that the torque is the max. possible from 10 m.p.h. upwards. In future, when taking acceleration tests, we might get a mark in the recorder of the instant when the throttle is opened, to see if any lag is shewn other than enough to allow the gas to get into the cyls., and compressed and fired say between one and two revs., [crossed out text] and suddenly opening the throttle from different speeds of say 10. 15. and 20 m.p.h. We have always been satisfied that we excel in this feature. If the gear is too high for the weight, or the air valve acts too quickly, or too slowly. etc., they cannot blame us, and I am sure that if it really exists, one of these two are wrong. R.{Sir Henry Royce} | ||