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).
Technical report on the steering, road springs, and carburetter of the 6-Goshawk-11 model.
| Identifier | ExFiles\Box 46\2\ Scan394 | |
| Date | 21th August 1922 | |
| To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} X4086 R1/M21.8.22. RE. 6-GOSHAWK-11! X.4219 X.4086. STEERING X.4264. The steering on this car seems distinctly better than 4-Goshawk-1 and in fact no-one would complain of it if it remains as it is and does not shew any worse shocks than I have experienced. I still think, however, that for safety we should allow the longitudinal tube to lengthen at least .4 without the spring buffer becoming choc-a-bloc. I think the amount that it should shorten might be kept to about .2" I have asked Mr. Day to send you particulars of springs that will give us a set-up pressure of 100 and 150 lbs. with as little increase as is convenient so that we could safely say we knew the maximum forces to which the steering gear is subject. The only part then will be the shocks received by the cross steering tube which we find difficult to eliminate. It is quite evident to me that the greatest trouble that we have experienced is due to the imperfection of the geometry between the longitudinal steering tube and the front spring, and the above is the best compromise to reduce this trouble to the minimum with the present standard chassis equipment. ROAD SPRINGS. X.4261. No.6.Goshawk 11. appears less flexible than 4-G-11. It does not ride as comfortably at slow speeds, in fact one would say to some extent we had spoilt the springing of the car, and that 4-G-11 was RR. springing and 6-G-11 might be anybody's springing. We must mind we do not get shock dampers which cause harshness, or use too stiff springs. CARBURETTER. X.4228. 6-Goshawk-11 engine owing to its present compression naturally runs better slowly, and seems very satisfactory, but 2 little points require attention:- (1) The needle valve does not seem quite right and this has been the case with all 3 carburetters which I have used. This results in a slow overflowing drip. (2) The ignition seems to require a somewhat increased range of control if we desire to be able to start the engine on the ignition control. 6-G-11 made contact which could not be broken on nearly every occasion that I have tried it. Contd:- | ||