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).
Log of engine test conditions, results, and remarks concerning fuel nozzles.
| Identifier | ExFiles\Box 179b\3\ img200 | |
| Date | 14th February 1933 | |
| -18- Hs{Lord Ernest Hives - Chair}/M.1/M14.2.33 contd. Test No. Test conditions & Results. Remarks. 4c. Power check gave only 90.5 lbs/ sq.in. nozzle suspected. 4d. New Bosch 8-hole nozzle tried Same power as 8-hole Power 90.5 lbs/sq.in. B.M.E.P. nozzle, hence 8-hole nozzle not giving power it should. 4e. Standard 8-hole nozzle holes Test proves that cleaned out with .010" drill. part cause of low Power B.M.E.P. 95.6 lbs/sq.in. power is carbon in Sp.{Mr Spinney}Cons. .477 lbs/BHP/Hr. nozzle holes. 4f. Power check with new R.R.-Bosch nozzle (ball race steel). Power 94.8 lbs/sq.in. Sp.{Mr Spinney}cons. .489 lbs. 4g. Power check with standard Bosch Power identical with nozzle with holes cleaned out. that obtained with Power 95.6 lbs/sq.in. B.M.E.P. redrilled Bosch Sp.{Mr Spinney} Cons. .477 lbs. nozzle. Test 4e. 4h. Motoring losses measured over Curve plotted in speed range 2100 - 1000 RPM. Fig.20. 33 lbs/sq.in. at 2000 R.P.M. 4i. Standard R.R-Bosch nozzle in S/ENGR. checked. Power 86.8 lbs/sq.in. B.M.E.P. Sp.{Mr Spinney}cons. .530 lbs/BHP/Hr. 4j. Above nozzle redrilled with .010" This test shows drill. Power 93.3 lbs/sq.in. effect of carbon in Sp.{Mr Spinney} Cons. .496 lbs. nozzle holes. 4k. R.R-Bosch nozzle 8 holes, Since reduction in .0115" dia., .025" long x 140° hole diameter by Power 92.7 lbs/sq.in. carbon caused drop Sp.{Mr Spinney} Cons. .506 lbs. in power, it was thought that larger hole might give increase in power. | ||