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 load magnitude and direction on the end journals of a flat 12-cylinder engine at 3500 RPM.
| Identifier | ExFiles\Box 115\2\ scan0513 | |
| Date | 16th November 1939 guessed | |
| FLAT 12 CYL. ENGINE - LOAD ON END JOURNALS A-G @ 3500 RPM JOURNAL A - O GIVES MAGNITUDE & DIRECTION OF LOAD WHEN N.1 PISTON IS ON FIRING T.D.C. JOURNAL G - N.6 BORE 3 1/2 STROKE 4 1/2 CONN.ROD 4.08 CRANK WT OF PISTON, RINGS, AND PIN 1.61 lbs. 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 1 4 2 6 3 5 B 2 6 3 5 4 1 Graph Data: Y-AXIS (LBS): 4000, 3000, 2000, 1000, 0, 1000, 2000, 3000, 4000 Degrees: 360, 330, 300, 270, 240, 210, 180, 150, 120, 90, 60, 30 Plot Points: 690, 660, 630, 600, 570, 560, 510, 480, 450, 420, 390, 20 SHEET 3. | ||