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 diagram of crankshaft inertia loadings at 4500 RPM for Crank Arrangement LeC.5433.
| Identifier | ExFiles\Box 115\1\ scan0347 | |
| Date | 24th March 1937 guessed | |
| INERTIA LOADINGS ONLY AT 4500 R.P.M. CRANK ARRGT. LeC.5433, BUT WITH WEBS .650 THICK & STD. 25/30 RODS. SEE RM.{William Robotham - Chief Engineer} 364 FOR BIG END LDGS. ANGULAR POSN OF No 1 CRANK. LBS/SQ" T.D.C. CENTRE BRG. LOADS, MAX. VALUE 1080 LBS/SQ" INTERMEDIATE BRG. LOADS, MAX VALUE 1270 LBS/SQ" WRAITH III JOURNAL LOADINGS COMPARATIVE MAXIMUM LOADINGS AT 4500 R.P.M TABLE: MODEL | BIG END. | CENTRE MAIN. | INTER. MAIN. 4 1/4 L. BENTLEY. | 2060 | 1770 | 2190 WRAITH III | 2120 | 1080 | 1270 WRAITH III WITH 5/8" BIGGER PINS | 2030 | 1100 | 1290 | ||