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).
The measurement of angular distortion in a crankcase bearing housing to assess rigidity and design.
Identifier | ExFiles\Box 137\4\ scan0122 | |
Date | 21th November 1930 guessed | |
-2- To decide whether this deflection was due to the bolts bending, we arranged to measure the angular distortion of the crankcase bearing housing by a clock at Y in the sketch. We then noted that the movement of X. (the continuation of the bearing cap bolt) was less than that at Z. also measurements taken on the crankcase web further from the centre line of the crankshaft than Y gave less angular movement than at Y. We see, therefore, that most of the distortion of the bearing cap is due to bending of the crankcase web and that this web bends less towards the edges of the crankcase. We therefore consider that our results emphasise the importance of the crankcase and cylinder block assembly rigidity. The ideal bearing cap construction for stiffness would appear to be that used in the F.{Mr Friese} and H.{Arthur M. Hanbury - Head Complaints} engines. Hs{Lord Ernest Hives - Chair}/H.Grylls. | ||