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).
Drawing showing a revised arch with notes on a new clearance for the axle.
| Identifier | WestWitteringFiles\T\March1929-December1929\ Scan199 | |
| Date | 5th September 1929 guessed | |
| NOTE ORIGINAL THIS NEW CLEARANCE SHOULD ONLY EXTEND 4.5 INS EITHER SIDE OF THE AXLE, WHEN IT CAN HAVE MERGED INTO THE ORIGINAL ONE REVISED ARCH 21.000 7.500 4.750 LEVEL TOP OF SUBFRAME FIG 1. | ||