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).
Axle strength test results for a 1600 type standard axle with a tie rod fitted.
| Identifier | ExFiles\Box 49\1\ Scan014 | |
| Date | 13th October 1911 | |
| R.B. 449 (20 H) (W953 13.10.11) G 2051. TBB 500 Axle strength tests, old type axle 1600 type standard axle tie rod fitted, load applied on the top of box Weight | Deflection bottom of box | Deflection across flanges tested on edge | Deflection across bottom flanges | End of tie bar to bottom of axle tube 0 | 0 | 0 | -.024" | 11.765" 2278 lbs | .038" | -.007" | -.025" | 11.750 3622 " | .081" | -.018" | -.027" | " " 4966 " | .117" | -.035" | -.037" | 6310 " | .168" | -.039" | -.036" | 11.735" 7654 " | .216" | -.065" | -.037" | 11.720" 8998 " | .286" | -.104" | -.041" | 11.705" 10342 " | .493" | -.11[hole] | -.049" | 11.685" 11686 " | collapsed | collapsed | collapsed | | ||