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).
Experimental car troubles from March 1940, covering engine mountings, pistons, oil leaks, and cylinder wear.
| Identifier | ExFiles\Box 135\2\ scan0206 | |
| Date | 14th August 1940 | |
| Copied by Rm{William Robotham - Chief Engineer}/KC. 23.12.41. 1134 To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}1/SW.14.8.40. Report on Experimental Car Troubles from March 1940 to Present date. ENGINE. Engine Mountings. Engine mountings for B.80's we can consider final-ized. Front engine mounting rubbers should be fitted horizontally as per scheme No.PL.222. The lightened type of rear engine mounting to GCD.1417 is not satisfactory, it does not control engine movement sufficiently, and allows the pedal mechanism to rattle, we therefore propose retaining the standard rear engine mounting. B.60 engine mounting position is not yet settled. The engine appears to require more torque control, but the position is aggravated by the fact that we have not yet fitted the correct scheme of engine controls, and engine movement is felt on the accelerator pedal. We propose to try correct engine controls before doing anything further with engine mountings. Flush Top Pistons. Tests have been done with flush-top pistons in 11-B-V and 9-B-V cars, and they give us an advantage of 2° in detonation. Rocker Cover Oil Leak. Rocker cover oil leak on 9-B-V was found to be due to the washer having shrunk ½". Lips have now been fitted inside the rocker cover to keep the washer in position. Design scheme required. Broken Oil Pipe. Broken oil pipe on 9-B-V from oil filter to crank-case is receiving design attention. Cylinder Bore Wear. Cylinder bore wear has been checked on 25-G-VI car this car has chromium plated bores, and the wear was only .0005" in 14,000 miles. -continued- | ||