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).
Confirmation of a phone message to Derby regarding improvements to aero engines.
| Identifier | ExFiles\Box 179b\1\ img321 | |
| Date | 17th February 1933 | |
| sc. FROM R.{Sir Henry Royce} CONFIRMATION OF 'PHONE MESSAGE TO DERBY. C. to WGR. BG. BS.{A J. Barnes - Assistant Manager} C. to RY. & HY.{Tom Haldenby - Plant Engineer} re. AERO ENGINES. ORIGINAL RECEIVED I telephoned to Derby this morning as follows: I am very pleased to hear that the oil flow into the crankshaft makes such a great improvement. (1) Don't for heaven's sake reduce this but try to better retain the oil by the big end. (2) If (1) is impossible to improve make pistons so that oil spray does not so easily get into the combustion chamber. (3) Spray is good for well lubricating the liners and cooling the pistons. (4) The oil is the best way of carrying away the heat. (5) I cannot see that we be forced to use 50 lbs. oil pressure if 30 lbs. lubricates the whole engine properly. (6) I am hoping to hear soon the result of test of pressure in the crankpin. (7) You will realise that engine speed of 2750 is high, and oil consumption will for this reason be greater than normal. (8) Look upon it that the increase of oil flow is shouting out that the non-grooved bearings were seriously defective. (9) From HS{Lord Ernest Hives - Chair}/FMR's memo. it would seem that all the pump is only feeding high pressure oil to the main bearings, but I think there is a restricted jet spray to the gearing. This may be taking a very large percentage of the pump's capacity. (10) I would if necessary much rather increase the capacity (width of the pump) than decrease the flow into the crankshaft. (11) I expect you will be running again by now, and perhaps soon be able to test if engines under the rating and speed of the recent failures can go on any longer without showing signs of distress. (12) I am particularly anxious to get in the two piece block at the first possible minute, certainly for Goshawk. R.{Sir Henry Royce} | ||