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 testing procedures for Bentley II No.4 and B.60 No.3 units, detailing oil consumption, blow-by, and power curve checks.
| Identifier | ExFiles\Box 155\2\ scan0307 | |
| Date | 27th March 1939 | |
| -3- NO.2 BED. Bentley II No.4. Having completed the oil consumption curves on the tinned rings to a constant figure, take the following:- (1) Blow-by figure over power curve range. (2) Oil flow to the bearings, i.e. total minus auxilliary. This can be carried out by means of an external tank, the standard sump running dry, together with a tapped auxilliary feed. Other than the actual flow, the inlet and outlet temperatures to be taken to obtain the heat flow to oil. (3) The big ends then to be grooved and an extra hole in the con. rod opposite to existing oil jet hole to be drilled. These holes should both be .040 dia. Then repeat test (2). Drawings are required for these mods. (4) Refit normal sump etc. and take oil consumption tests over 2 hrs. at 4000 R.P.M. (5) Fit special pistons which have Hepworth & Grandage rings. After running in check "blow-by" whilst taking a power curve, then commence 2 hr. oil consumptions at 4000 R.P.M. Continue until a constant figure is obtained. It should be ensured that the same oil is used throughout the tests. NO. 5 TEST HOUSE. B.60 No.3 Unit. Continue as previous memos Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}22/ER.15.2.39 and Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}3/JH.6.2.39 with the following addition (1) Transfer unit to other bed and take check power curve. | ||