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).
List of ground clearances for the 26-EX model when both axles are clamped on to the buffers.
| Identifier | ExFiles\Box 4\1\ 01-page158 | |
| Date | 15th November 1934 guessed | |
| 26-EX Ground Clearances when both Axles are clamped on to the Buffers. Under Front Axle 8" * Jackall Jacks 4 5/8" * D.W.S. Jacks 7" * Crankcase 6 1/4" * Front Stg. Arm c.s. tube 7 1/2" * Battery Box 3 1/2" * Rear silencer 4 1/2" * Front silencer 5 1/4" * Rear Bano Cross Member 3 1/2" * Fish Tail. 6" | ||