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).
Blueprint diagram of an X-shaped cross-member fitted to the 10-EX model.
| Identifier | ExFiles\Box 29\1\ Scan342 | |
| Date | 5th July 1918 guessed | |
| ENGINE MOUNTING IS PIVOTTED HERE TO OBTAIN 2-POINT FRONT MOUNTING, DOWELS ARE INSERTED HERE. 1/4" DEEP FISH PLATES X-SHAPED CROSS-MEMBER FITTED TO 10-EX | ||