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).
Test report on carburetters, brakes, rear engine bearing leak, and chassis lubrication.
| Identifier | ExFiles\Box 91\4\ scan0147 | |
| Date | 27th July 1935 | |
| ( 2 ) without getting bubbles, rising in the petrol a foot from the tank. The test he gives is useless. We have run all the petrol out of the Carburetters, let the Engine stand for an hour, switched the petrol and as soon as the pumps ceased pumping started up, result tons of black smoke. We have done a host of work on the Carburetters and we are getting results, but until we are satisfied that the results can be justified, it is no use reporting. To say insulating the Carburetters would not do any good might be wrong, but to touch any part of the Engine when it comes in, is asking for burns. It takes 25 minutes with a cold Engine to remove one Carburetter, 8 to 10 minutes to remove the Silencer. To refit 4 Carburetters takes half a day. We have got over the worst of the strong mixture, but we are not as yet satisfied. BRAKES. We have reported that the Brakes were better balanced with the increased front braking, and no trouble had been experienced with the steering, due to the increased braking. It is not any too much. We think they are good. LEAK FROM THE REAR ENGINE BEARING. We are entirely satisfied with the results obtain-ed{J. L. Edwards} by our method. We have made a 100% cure of what was the worst leak of oil ever seen. 5000 miles is a sufficient proof. The felt at the back is as dry as the day we put it in. The following are the pressures recorded in the cavity of the rear back plate, where the felt used to be :- Inches of Water. M.P.H. 0 0 ........ 10 0.2 0.1 ........ 20 0.4 0.2 ........ 30 0.8 0.4 ........ 40 1.2 0.6 ........ 50 1.50 0.75 ........ 60 2.0 1.00 ........ 70 2.40 1.20 ........ 80 2.80 1.40 ........ 85 We fitted a pipe permanently into the cavity, so that we should be positive of the figures obtained. CAM ADJUSTMENT TO BRAKES. The reduced height of Cam to the rear Brakes has given no trouble. In to-days daily Report, you will see the trouble we are in, with lubrication of the Chassis parts. The rear is serious. It is incomprehensible why we go into the trouble of making expensive spherical bearings with shims for the torsion rod; when vulcanized rubber will do more than what you get with expensive bearings. | ||