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).
Reported issues with speedometer accuracy and gearbox rattles on a Goshawk-11 vehicle.
| Identifier | ExFiles\Box 46\2\ Scan121 | |
| Date | 4th April 1922 | |
| X4086 Hs.{Lord Ernest Hives - Chair} from Ep.{G. Eric Platford - Chief Quality Engineer} (Le CanadelHenry Royce's French residence) EP{G. Eric Platford - Chief Quality Engineer}3/LGS.4.22. 4.GOSHAWK-11. X4219(struck through) X4086 We have received your reports dated 2.4.22. the points of interest of which we have circulated. We have also received R's report on Carburation and Suggestions which we have also circulated. As far as we are concerned at the Works here, we are simply making it our business to convey to you suggestions which have been put to us and for you to make the best of and deal with as you think fit while you are with R.{Sir Henry Royce} Referring to your speedometer reading 5% too high. Could you please let me know the actual number of this speedometer. We understand they have been numbered 1, 2 and 3 and each of these speedometers give different readings for different revs. and there appears to have been a mistake made in the calculations. This is now having the attention of BY, which we hope to correct for production purposes. With regard to the period of rattles in the gear box on 6-Goshawk-ll referred to in my memo. of yesterday. We have not been able to do anything further with our investigations on this trouble owing to the rush we are now having to get 6/7-Goshawk-ll completed. The following facts, however, may be helpful in considering this trouble. The rattle at (handwritten: full throttle) 40 M.P.H. is there when driving or retarding. But the rattle at the lower speeds is only noticed when driving forward under lower speed conditions. The rattle immediately disappears under all conditions when the clutch is disengaged. One could also hear these rattles taking place when running on the 2nd. gear but they are nothing like as pronounced or definite, and it is difficult to say whether the periods agree with the engine revs. or propeller revs. To set up this period one must conceive that there is an even turning going on in the drive and this, I can only think, may be due to the action of the universal joints or uneven turning of the bevel pinion. Which may be the cause for the variation in the different powers. There certainly is at present considerable ground for investigation on this trouble and I trust we shall be able to give you more definite facts in regard to our investigations on this trouble during the next few days. EP.{G. Eric Platford - Chief Quality Engineer} | ||