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).
Cylinder gudgeon pin measurements and engine oiling performance.
| Identifier | ExFiles\Box 48\1\ Scan101 | |
| Date | 20th September 1919 | |
| R.M. 235 a-100 T. (N.F. 376. 16-4-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2354 Contd. -2- CYLINDERS. | | 1 | 2 | 3 | 4 | 5 | 6 |---:|---:|---:|---:|---:|---:|---:| | Twist on Gudgeon Pin | .007" | O.K. | .002" | .004" | .001" | .002" | | Tilt on Gudgeon Pin. | .003" | .002" | .007" | .006" | .003" | .002" | | Gudgeon Pin hole in Piston. | .002" | .001" | .001" | .001" | .002" | .002" | Compared with some of the Production Engines we have tried, 1. EX is very true. We too an ordinary production chassis and measured the alignment of the rods and found that it was as follwos:- CYLINDERS. | | 1 | 2 | 3 | 4 | 5 | 6 |---:|---:|---:|---:|---:|---:|---:| | Twist on Gudgeon Pin | .006" | .005" | .018" | .007" | .005" | .005" | | Tilt on Gudgeon Pin. | .007" | .020" | .015" | .004" | .009" | .006" | | Gudgeon Pin hole in Piston | .002" | .002" | .002" | .001" | .002" | .001" | X.3437 X.3056 OILING. As regards oiling, we have run 1. EX with the extra oil on the whole time; we have had no trouble with oily plugs but the oil consumption on a run of 600 miles worked out to 1600 miles to the gallon. This is about half as much as we did before we had the extra oil on the whole time. The condition inside the cylinder shewed that a fair amount of carbon deposit had formed on the piston tops. The Test Dept: have tried several new Contd. | ||