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).
Recommendations for modifications to the water pump, exhaust, fan, steering, and radiator on the Goshawk 11.
| Identifier | ExFiles\Box 180\M1\4\ img001 | |
| Date | 1st November 1921 | |
| ORIGINAL 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 EY. c. to EF. c. to Wor.{Arthur Wormald - General Works Manager} X4219 GOSHAWK 11. WATER PUMP. We have had a case of the rotor becoming unscrewed on the spindle. We consider that the thread on the spindle should be made left-hand so that if there is any obstruction on the rotor, the drive will not tend to unscrew it as at present. We think this is very essential because one anticipates that even if the water is drained out, there will be a thin coating of ice formed in the pump which, with the present thread, would certainly cause it to fail. We also recommend that the rotor should stand back to be definitely clear of the end of the spindle. At present there is a risk of the lignum-vitae stop rubbing on the rotor instead of the end of the spindle. We also recommend that the drain tap on the water pump is fixed vertical. At present the water squirts out over on to the spring shackle. We also suggest that the gland nut on the water pump should be made left-handed. We have had one case of this running back. This was caused by the split pin in the nuts of the fabric coupling rubbing against the gland nut and unscrewing it. We believe that more clearance has been given at this point. We feel, however, that the left-hand thread should be used. STAY FOR EXHAUST PIPE. The exhaust pipe for the back axle vibrates badly and sometimes makes a noise against the petrol tank. We think that it should be stayed off the frame. This was done on Goshawk 1. FAN LUBRICATION. At present there is no means of lubricating the fan. We recommend that provision should be made for an "ENOTS" Lubricator. STEERING STOPS. We recommend that when the front axle is being increased in section, that the steering stops should be re-considered. The present stops are relatively very heavy and are not very effective because they are easily bent. RADIATOR VENT PIPE. The vent pipe from the radiator is fixed by means of a flange joint and two studs. The clip for the pipe at the bottom of the radiator is not firm enough to prevent it from rattling. We know of no reason why the vent pipe should not be permanently soldered to the radiator in a similar manner to what we have always used on the 40/50 H.P. chassis. If this is done we can easily prevent the pipe from rattling by soldering it. Hs.{Lord Ernest Hives - Chair} | ||