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).
Modifications to relief valve seatings and failures of the telegage, bijur tank, and windscreen wiper.
| Identifier | ExFiles\Box 5a\3\ 03-page036 | |
| Date | 9th February 1921 guessed | |
| -7- Insert Seatings to Relief Valve as shown on Arrgt: Ex.6631. Loads set - L.P.90 lbs. H.P.115 lbs. We deleted the holes in the H.P. valves of all the dampers when we arrived here. This was done to make the car hold the road better and to damp down the rebound of the springs. We did not alter the loading of the dampers which remain as set, i.e. L.P. 90 lbs. H.P. 115 lbs. These loads have remained consistent, and we have not experienced any lost movement of the lever with these dampers, as was experienced with the previous damper on 23-U. The slight leak from the rear glands, has reported, has not been sufficient to cause any detrimental loss of oil in the rear dampers. We have had a failure of the rear damper connecting links fooding the top bell pin. The failure was caused by the plunger in the connecting link having torn up the asbestos crumpet when the connecting links were fitted. We have sent a full report and a sketch showing this failure. The lubrication of the front connecting links has been ample. TELEGAGE. The telegauge gradually failed early in the test. We found the failure was caused by a faulty union in the tank unit, of the Balance line. The union had a faulty seam which had opened out. We replaced the faulty union. The telegauge has since given the correct reading of the quantity of petrol and is operating satisfactorily. BIJUR TANK. We have had a failure of the bijur tank due to the cork washer having fouled the outlet orifice. We have since reporting, received a memo. stating that the cork washer shrinks in diameter, which is the cause of the failure, the washer not being located and the piston apparently dislodged the washer. A steel washer has been fitted to overcome this trouble. LUCAS WINDSCREEN WIPER. The Lucas Windscreen Wiper failed entirely early on in the test. The failure is due to the bronze ratchet wheel becoming stripped through the severe action of the wind whilst driving in rough weather with the wiper in motion. This failure is common, and has been several times reported to Lucas'. We have just received a new wiper direct from Lucas' which we observe has less number of teeth which are broader. This wiper has been fitted. | ||