Car test run detailing modifications and issues with the damper, gearbox, and carburetter.
| Identifier | ExFiles\Box 11\4\ 04-page022 | |
| Date | 3rd May 1932 | |
| To Hs. {Lord Ernest Hives - Chair} From G.W.H. Hotel de France, Chateauroux(French test region), FRANCE. 3rd May 1932. 19-EX. We have resumed running with the car today after having had the low inertia damper refitted with Ferodo discs, with complement of springs, and set to a load of 18 lbs. We have carefully noted and find no sign of engine gear rattles. We will report later with regard to the crankshaft period. We have fitted the Luvax bijur system as far as the rear axle; we have left this for a later date. GEARBOX. We have further strengthened up the spring for the selector shaft to see whether it overcomes the trouble of gears coming out of mesh. We shall be able to report upon this after this afternoon's run. CARBURETTER. Upon dismantling the air valve there were distinct signs of the valve having been tight. It would appear not to be quite concentric, as the hard marks on the valve were on one side only. We are going to get figures of acceleration before attempting to change the needle valve. The misfiring which occurs when picking up we shall deal with later. We had trouble with the throttle sticking and found that it was due to the ball race of the controls for the governor. This had been fitted up dry and had rusted up, causing it to partially seize. This has been made O.K. We have not fitted the stop to the carburetter, but have altered the controls so that the throttle remains always slightly open, to keep the engine slow running. We find that the stop or definite slow opening of the throttle is necessary for starting up the engine from cold, otherwise the action of the governor closes the throttle, and several attempts have to be made to keep the engine going, with this type of carburetter. G.W.H. G.W.H. Hancock | ||
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).