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).
Tests conducted on Goshawk induction pipes to investigate petrol distribution and engine performance issues.
| Identifier | WestWitteringFiles\I\July1922\ Scan117 | |
| Date | 1st July 1922 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} ORIGINAL HSB/LG26. 7. 22. GOSHAWK - INDUCTION PIPES. X4227 X4390 X1487 X4228 We have carried out a number of tests lately on Goshawk 11. induction pipes. We fitted a pipe with suitable baffles and drains so that we could collect any liquid petrol passing into the engine, and we have tested this pipe on the test bench and on the road. The tests showed that the dis- tribution under all conditions was very good. There was relatively the same amount of liquid petrol passing into the cylinders and this amount was very small indeed. In a run of 100 miles, the total amount of liquid petrol collected was approximately 6 teaspoonfuls. The faults on Goshawk 11. with bad petrol are not like the faults we have had on the 40/50 or like those experienced in America. On the 40/50 we had the fault of, either consider- able loss of power due to bad distribution at low speeds full throttle or actual missing fire due to bad distribution or load- ing up. The fault which is apparent on Goshawk 11. with bad petrol is that there is a definite hesitation in picking up quickly full throttle. It does not appear to be bad distrib- ution because the whole of the cylinders fire weakly when the throttle is open quickly. If the throttle is opened slowly the engine performs quite well with inferior petrol even with 20% paraffin added. contd:- | ||