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).
Results of an engine rebuild and component examination.
| Identifier | ExFiles\Box 83\1\ scan0227 | |
| Date | 27th September 1936 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} [Handwritten: gny S.H. 24/x AP/VV] Levallois, September 27th, 1936. 6-B-IV. We have rebuilt the engine and taken an oil test. At the present moment, although the escape of oil from the main bearings is great there is sufficient at the connecting rods to prevent a seizure, but I do not advise too much high speed work. The test with the two induction systems will be carried out, then arrangements will be made for the car to return. I have read your memo to Waller criticising my report upon the B-56-BN{W.O. Bentley / Mr Barrington} main bearings. I make no comments but may be both yourself and Swindall have over looked the fact, that, although the bearing wear may be only .002" the slackness of the bearing in the housing is equal to bearing wear under running conditions. If there is say .008" slack in the housing and .002" in the bearing, the actual bearing clearance under oil pressure is .010" and so was the case with B-56-BN{W.O. Bentley / Mr Barrington}, the con rod seized through lack of oil. We have examined the crankshaft damper of 6-B-IV. The fabrics have grooved the centre plate fairly heavy. There was more sludge collected on the inside rim than is usual. The friction load is 17 lbs. at 17¾ radius The bearing surface and general conditions are good. The engine will be fitted into the car by tomorrow and the car should be on the road by Tuesday. I have arranged to get 22-G-V up here to have the roll rod and new front springs fitted. Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||