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 moments of inertia for various wheel and tyre combinations to investigate high-speed wobbles.
| Identifier | ExFiles\Box 45\1\ Scan383 | |
| Date | 26th November 1926 | |
| X4050 26.11.26 HIGH SPEED WOBBLES. X3775 / X457 I of 6.75 tyre and tube - 70.4 lbs. ft. units. I of 6.00° tyre and heavy tube - 78.4 lbs.ft.units. I of disc and steel rim and wheel - 58.6 lbs.ft.units. I of disc and wheel - 33.5 lbs. ft. units. I of wheel alone - 17.4 lbs.ft.units. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||