Graph showing crankcase deflections under various loads for a 25 HP engine.
| Identifier | ExFiles\Box 103\2\ scan0248 | |
| Date | 29th August 1931 guessed | |
| 25 H.P. CRANKCASE DEFLECTIONS CRANKCASE SUPPORTED BY TWO END MAIN BEARINGS; LOAD APPLIED TO CENTRE MAIN BEARING. DEFLECTION IN INCHES LOAD IN LBS GRAPH LINES (TOP TO BOTTOM): - CENTRE OF MIDDLE BRG CAP - SIDE OF MIDDLE BRG CAP - EDGE OF CRANKCASE - CENTRE & SIDE OF MIDDLE, BRG CAP - EDGE OF CRANKCASE - MIDDLE BRG CAP - MIDDLE BRG CAP CONDITIONS (TOP TO BOTTOM): - HORIZ. LOADING BLOCK OFF. - HORIZ. LOADING BLOCK OFF. - HORIZ. LOADING BLOCK OFF. - HORIZ. LOADING BLOCK ON. - HORIZ. LOADING BLOCK ON. - VERT. LOADING BLOCK OFF. - VERT. LOADING BLOCK ON. BOTTOM TEXT: RELATIVE STIFFNESS OF CRANKCASE IN VERTICAL PLANE TO HORIZONTAL PLANE = 5:1 STIFFENING EFFECT OF CYL. BLOCK = 2 1/2 X LOAD ON CENTRE DUE TO CRANKSHAFT ALONE AT 3000 R.P.M. = 2000 LBS. | ||
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).