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).
Reconsideration of deleting an oil hole in connecting rods to manage oil consumption and lubrication.
| Identifier | ExFiles\Box 93\1\ scan0121 | |
| Date | 19th August 1936 | |
| To Mx.{John H Maddocks - Chief Proving Officer} c. to E.{Mr Elliott - Chief Engineer} X314 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}10/KW.19.8.36. Deleting Oil Hole in Connecting Rods. We have been reconsidering this move and are not too happy about it. With the L shaped ring we have decreased the oil consumption considerably. The Stromberg Carburetter is an entirely unknown quantity with regard to its effect on pistons when starting up. It seems unfortunate that at this particular moment we should have to cut down our lubrication supply to the cylinder walls. We are therefore anxious to see if we can overcome Mx{John H Maddocks - Chief Proving Officer}'s complaints and at the same time retain our jet of oil from the connecting rod. We feel sure that this must be possible. There is a bit of a mystery as to why the oil would rather go through a .032" hole at right angles to its normal movement than pass through a .125" hole. We have therefore asked Mx.{John H Maddocks - Chief Proving Officer} to try and let us have a chassis where the gudgeon pin knocks are in evidence, and we will have a go at putting it right without cutting off the oil supply from the centre of the rod. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||