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).
Engine component testing report covering tappets, bearings, an exhaust silencer, oil pressure, and ignition.
| Identifier | ExFiles\Box 4\1\ 01-page244 | |
| Date | 21th January 1935 guessed | |
| -4- New bottom tappets, existing ones having been badly grooved, being decided to run A side as standard solid tappets with normal clearance and B side with hydraulic tappets for comparative wear. Unit return to RHC.{R. H. Coverley - Production Engineer} on 22.11.34 after run of 94 hours, a total of 751 hours, the bearings being very tight. Unit No. 2 again on test 27.11.34, the bearings having been eased. This unit developed 199.4 BHP. at 3750 RPM. and a maximum MEP. of 110.3 at 2000 r.p.m. Experimental type of exhaust silencer Hs.{Lord Ernest Hives - Chair}1526 improved from losing 55 BHP. to 35 BHP. Investigation of low oil pressure when idling and hot, shows necessity of larger pump, with an improved release for the oil when cold. Ignition advance tests carried out and development of suitable governor springs (Hs.{Lord Ernest Hives - Chair}1676) to follow the ideal advance line. Unit returned to RHC.{R. H. Coverley - Production Engineer} for examination 15.1.35. having run a total of 123 hrs, 494 hours since last inspection and 7 weeks on test. Both A and B side tappets badly worn. | ||