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).
Polar plot diagram showing the load on the centre journal 'D' of a flat 12-cylinder engine at 3500 RPM.
| Identifier | ExFiles\Box 115\2\ scan0511 | |
| Date | 16th November 1939 guessed | |
| FLAT 12 CYL. ENGINE LOAD ON CENTRE JOURNAL D @ 3500 R.P.M. O GIVES MAGNITUDE & DIRECTION OF THE LOAD WHEN No1 PISTON IS ON FIRING T.D.C. BORE 3 1/2" STROKE 4 1/2" CONN. ROD / CRANK 4.08 CONN. ROD WEIGHTS FORKED | PLAIN. LITTLE END 0.8 | 0.75 BIG END 2.0 | 1.27 BEARING DIMENSIONS 2.75" dia x 2.0" FIRING ORDER A.{Mr Adams} 1 4 2 6 3 5 B. 2 6 3 5 4 1 WT. OF PISTON, RINGS, AND PIN 1.61 lbs SHEET 5 LBS | ||